GridSeed 5-chip USB miner voltage mod - page 35.

powersup

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Quote from: wolfey2014 on April 23, 2014, 09:24:18 AM

Quote from: powersup on April 23, 2014, 09:11:27 AM

Quote from: wolfey2014 on April 23, 2014, 08:51:30 AM

I'm not going to do Zig's? mod. No point in it!
Just do the originally correct R52 49.9k mod and let it start making you more profits!
I seriously doubt we will ever need to revert our seeds back to mine SHA coins!
That's the only reason to even try a different approach. And if I was going to take a different approach, I'd simply add a DPDT switch to select between the original value of R52 (aka R139) and 49.9k.
End of story!
We KNOW without any doubt that the R52 mod works! Hundreds if not thousands of miners are now and have been using it successfully to make more profit$!

Well considering it took about 30sec to unscrew the heatsink, remove the resistor, and re-bridge R46, i would prefer this mod if it does work. I guess the point of this mod is it makes it very easy to revert to stock which i can vouch for first hand.

Well, based on your stellar record breaking fast resistor changing speed!!!, it would only take 2 minutes to revert the R52 mod!!!! Grin

Point is, based on your complaint, the mod doesn't seem to work as advertised, anyway!.....
We ALL KNOW that the R52 mod works, perfectly!
What are the odds that we will ever need to revert our pods back to stock anyway? Slim to none!
And, the most effective way to mod the pods, IF reversion is for some reason ever a desired feature, is to add a 33k and 49.9k resistors via a DPDT switch to R52's (aka R139), pads. Simple and permanent!
Never need to work on the pods again! EVER!
This DPDT mod (wolfey2014 and friends mod Cheesy

) is the ULTIMATE mod for our pods if one wants the option to select between SHA/DUAL or Scrypt overclock modes!
Someone also tried and evidently succeeded at overclocking SHA mode at 1000MHz. Not sure if any mods were made or not at the time.
I mean, let's just get this modding thing over-with and get back to mining and making money!

Firstly, In no way is my comment a complaint. I'm simply asking if anyone has this mod working and guide me in the right direction.

Secondly, its almost certain people will want to use their Gridseeds for sha256 if the price of BTC rises or a profitable SHA256 coin is released. There is also benefit in reverting back to stock for re-sale.

wolfey2014

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Activity: 378

Merit: 250

Quote from: Xer0 on April 23, 2014, 09:25:09 AM

Quote from: wolfey2014 on April 23, 2014, 08:24:17 AM

Quote from: happydaze on April 23, 2014, 08:09:18 AM

Is the point I've drawn the arrow to in this photo supposed to be bridged or not from the factory? I'm troubleshooting one of my gridseeds that has a few more errors than the others and I previously poked around that spot by mistake. I just can't see it well enough to tell if it is bridged or not. Any help would be much appreciated.

Not bridged.
Anything else I can do, let me know!

It is bridged!!

Once i "opened" it accidentally by too much heat nearby,
and the Miner was detected as nonworking-device on USB

Sorry but, looking at an unaltered factory pcb, it is UNBRIDGED on my pods.
But I do see it bridged on a picture of a modded pod.
Sorry for any misunderstandings though.
At any rate, glad to see you got your pod working again!
Good show!

Xer0

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Activity: 826

Merit: 1000

°^°

Quote from: wolfey2014 on April 23, 2014, 08:24:17 AM

Quote from: happydaze on April 23, 2014, 08:09:18 AM

Is the point I've drawn the arrow to in this photo supposed to be bridged or not from the factory? I'm troubleshooting one of my gridseeds that has a few more errors than the others and I previously poked around that spot by mistake. I just can't see it well enough to tell if it is bridged or not. Any help would be much appreciated.

Not bridged.
Anything else I can do, let me know!

It is bridged!!

Once i "opened" it accidentally by too much heat nearby,
and the Miner was detected as nonworking-device on USB

wolfey2014

sr. member

Activity: 378

Merit: 250

Quote from: powersup on April 23, 2014, 09:11:27 AM

Quote from: wolfey2014 on April 23, 2014, 08:51:30 AM

I'm not going to do Zig's? mod. No point in it!
Just do the originally correct R52 49.9k mod and let it start making you more profits!
I seriously doubt we will ever need to revert our seeds back to mine SHA coins!
That's the only reason to even try a different approach. And if I was going to take a different approach, I'd simply add a DPDT switch to select between the original value of R52 (aka R139) and 49.9k.
End of story!
We KNOW without any doubt that the R52 mod works! Hundreds if not thousands of miners are now and have been using it successfully to make more profit$!

Well considering it took about 30sec to unscrew the heatsink, remove the resistor, and re-bridge R46, i would prefer this mod if it does work. I guess the point of this mod is it makes it very easy to revert to stock which i can vouch for first hand.

Well, based on your stellar record breaking fast resistor changing speed!!!, it would only take 2 minutes to revert the R52 mod!!!! Grin

Point is, based on your complaint, the mod doesn't seem to work as advertised, anyway!.....
We ALL KNOW that the R52 mod works, perfectly!
What are the odds that we will ever need to revert our pods back to stock anyway? Slim to none!
And, the most effective way to mod the pods, IF reversion is for some reason ever a desired feature, is to add a 33k and 49.9k resistors via a DPDT switch to R52's (aka R139), pads. Simple and permanent!
Never need to work on the pods again! EVER!
This DPDT mod (wolfey2014 and friends mod Cheesy

) is the ULTIMATE mod for our pods if one wants the option to select between SHA/DUAL or Scrypt overclock modes!
Someone also tried and evidently succeeded at overclocking SHA mode at 1000MHz. Not sure if any mods were made or not at the time.
I mean, let's just get this modding thing over-with and get back to mining and making money!

powersup

sr. member

Activity: 406

Merit: 250

Quote from: wolfey2014 on April 23, 2014, 08:51:30 AM

I'm not going to do Zig's? mod. No point in it!
Just do the originally correct R52 49.9k mod and let it start making you more profits!
I seriously doubt we will ever need to revert our seeds back to mine SHA coins!
That's the only reason to even try a different approach. And if I was going to take a different approach, I'd simply add a DPDT switch to select between the original value of R52 (aka R139) and 49.9k.
End of story!
We KNOW without any doubt that the R52 mod works! Hundreds if not thousands of miners are now and have been using it successfully to make more profit$!

Well considering it took about 30sec to unscrew the heatsink, remove the resistor, and re-bridge R46, i would prefer this mod if it does work. I guess the point of this mod is it makes it very easy to revert to stock which i can vouch for first hand.

wolfey2014

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Activity: 378

Merit: 250

Quote from: powersup on April 23, 2014, 08:29:00 AM

So I had a go at the ZiG mod since I had some 16K resistors laying around. All seemed good, i check continuity, and resistance at the regulator leg was 49K so electrically everything looked fine. However when I plugged the unit in and tried hashing the red LED started flickering maybe at about 20-40hz, then started a flickering / stop cycle about every 3 seconds.

So has anyone tried this Mod and confirmed it worked? does the resistor need to be a 17K? I would have thought 1K difference wouldn't have mattered. Maybe I have missed something?

Note: miner worked fine once I removed the resistor and re-bridged R46 pads. I also did the R139 mod with a 47K resistor and it also worked.

I'm not going to do Zig's? mod. No point in it!
Just do the originally correct R52 49.9k mod and let it start making you more profits!
I seriously doubt we will ever need to revert our seeds back to mine SHA coins!
That's the only reason to even try a different approach. And if I was going to take a different approach, I'd simply add a DPDT switch to select between the original value of R52 (aka R139) and 49.9k.
End of story!
We KNOW without any doubt that the R52 mod works! Hundreds if not thousands of miners are now and have been using it successfully to make more profit$!

nst6563

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Activity: 252

Merit: 254

Quote from: wolfey2014 on April 23, 2014, 08:13:22 AM

Quote from: nst6563 on April 22, 2014, 11:18:47 PM

Quote from: wolfey2014 on April 22, 2014, 10:56:05 PM

*snip*
If I'm understanding this mod correctly. Reversing it will still require the same amount of work to reverse as reversing the R52 mod.
One thing that is better about this mod though is that all one has to do is remove the 17K resistor to put it back to original specs.
I for one do not look forward to soldering those two bridges again! I was happy we did away with that. It's a real pain to do, even for a master of soldering.
If all I have to do is solder on a 17K resistor to those two points, I agree that is it a better option than removing 'r139' (aka r52) and soldering in a replacement resistor only to later have to remove it then solder back in that tiny SMD resistor.
Still, why has no one yet figured out how to overclock SHA mode? Will any other value resistors allow this? A happy medium between SHA and Scrypt overclocking? I mean, it would be great to be able to overclock dual mode if the need ever arises.
The best thing to do is add a SPDT switch for MOD IN - MOD OUT.
I believe someone else envisioned this option a while back.

Yes, that was an idea I had and even hooked up a 50k pot to test things out. I just haven't had the chance to do anything more since the gridseed I've been testing things on hasn't been the same since it blew the 3022m mosfet while trying to dual mine at too high of a voltage/frequency (47k in place of r139 and running at 1100Mhz).

The real idea I had was to do the single bridge mod, and replace or even add a another resistor in parallel to get the value of 49k so removal of r139 wouldn't be necessary. This way if one wanted to run in vmodded overclocked mode for scrypt only they could simply use the voltage=1 parameter in the command line options. Omission of the voltage=1 parameter would be running it in stock mode.

However....I think it is possible to overclock the gridseeds and run in dual mode, just not anywhere near the level they are being voltmodded and overclocked for scrypt only. I think 1000Mhz would be possible.

So...really...there are quite a few options to explore as far as modding the gridseed to allow for this. We could simply do the single bridge, and replace the stock resistors to the voltage=1 parameter could be used, or forget about the voltage=1 parameter and use a physical switch. Obviously both methods have their merrits.....but then again we could do BOTH, and change the value of r66 (36k - which is activated with voltage=1) to 50k, and change r139 (33k - stock or voltage=0) to 38k-40k. What this would (in theory) is allow the gridseed to run at a slightly higher voltage which should let it reach 1000Mhz for dual mode (and not let out the magic blue smoke), and enable the use of voltage=1 parameter to set the VID to use r139 (49.9k/50k) to raise the voltage enough to allow 1200Mhz+ for scrypt mode.

Anyone is welcome to take this idea and run with it. I'm working on getting funds together for another gridseed since I can't really determine stability on the one the mosfet blew on.

EDIT: Obviously the merit of using voltage=1 would be if you don't have physical access to the gridseeds and wanted to switch from dual mining to scrypt, it could be done via software in cgminer.

Hey nst6563, when did you first have this idea and when did you write about it on here?

About switching between voltages using the software parameter voltage=1? That's been a while since I had the idea, but I posted about it a few days ago (apr 19th). It's not really fully my idea, but just an expansion on the original bridge mod which enabled the use of the voltage=1. Also, it was *just* an idea - I only tried to dual mine with a modded gridseed once and blew a mosfet. I've repaired the damage and left the 50k resistor at r139 and only scrypt mined since. The other couple gridseeds I have are using 50k pots at r139, and the one coming today I may try this latest mod to cut r46 and place a resistor there while leaving the stock resistors in place.

powersup

sr. member

Activity: 406

Merit: 250

So I had a go at the ZiG mod since I had some 16K resistors laying around. All seemed good, i check continuity, and resistance at the regulator leg was 49K so electrically everything looked fine. However when I plugged the unit in and tried hashing the red LED started flickering maybe at about 20-40hz, then started a flickering / stop cycle about every 3 seconds.

So has anyone tried this Mod and confirmed it worked? does the resistor need to be a 17K? I would have thought 1K difference wouldn't have mattered. Maybe I have missed something?

Note: miner worked fine once I removed the resistor and re-bridged R46 pads. I also did the R139 mod with a 47K resistor and it also worked.

wolfey2014

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Activity: 378

Merit: 250

Quote from: happydaze on April 23, 2014, 08:09:18 AM

Is the point I've drawn the arrow to in this photo supposed to be bridged or not from the factory? I'm troubleshooting one of my gridseeds that has a few more errors than the others and I previously poked around that spot by mistake. I just can't see it well enough to tell if it is bridged or not. Any help would be much appreciated.

Not bridged.
Anything else I can do, let me know!

sandor111

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Activity: 616

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Quote from: happydaze on April 23, 2014, 08:09:18 AM

Is the point I've drawn the arrow to in this photo supposed to be bridged or not from the factory? I'm troubleshooting one of my gridseeds that has a few more errors than the others and I previously poked around that spot by mistake. I just can't see it well enough to tell if it is bridged or not. Any help would be much appreciated.

Measure the resistance between those 2 points, if you're getting hardware errors at 850 MHz, the chance is that it's setting the voltage below the default.

wolfey2014

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Activity: 378

Merit: 250

Quote from: nst6563 on April 22, 2014, 11:18:47 PM

Quote from: wolfey2014 on April 22, 2014, 10:56:05 PM

*snip*
If I'm understanding this mod correctly. Reversing it will still require the same amount of work to reverse as reversing the R52 mod.
One thing that is better about this mod though is that all one has to do is remove the 17K resistor to put it back to original specs.
I for one do not look forward to soldering those two bridges again! I was happy we did away with that. It's a real pain to do, even for a master of soldering.
If all I have to do is solder on a 17K resistor to those two points, I agree that is it a better option than removing 'r139' (aka r52) and soldering in a replacement resistor only to later have to remove it then solder back in that tiny SMD resistor.
Still, why has no one yet figured out how to overclock SHA mode? Will any other value resistors allow this? A happy medium between SHA and Scrypt overclocking? I mean, it would be great to be able to overclock dual mode if the need ever arises.
The best thing to do is add a SPDT switch for MOD IN - MOD OUT.
I believe someone else envisioned this option a while back.

Yes, that was an idea I had and even hooked up a 50k pot to test things out. I just haven't had the chance to do anything more since the gridseed I've been testing things on hasn't been the same since it blew the 3022m mosfet while trying to dual mine at too high of a voltage/frequency (47k in place of r139 and running at 1100Mhz).

The real idea I had was to do the single bridge mod, and replace or even add a another resistor in parallel to get the value of 49k so removal of r139 wouldn't be necessary. This way if one wanted to run in vmodded overclocked mode for scrypt only they could simply use the voltage=1 parameter in the command line options. Omission of the voltage=1 parameter would be running it in stock mode.

However....I think it is possible to overclock the gridseeds and run in dual mode, just not anywhere near the level they are being voltmodded and overclocked for scrypt only. I think 1000Mhz would be possible.

So...really...there are quite a few options to explore as far as modding the gridseed to allow for this. We could simply do the single bridge, and replace the stock resistors to the voltage=1 parameter could be used, or forget about the voltage=1 parameter and use a physical switch. Obviously both methods have their merrits.....but then again we could do BOTH, and change the value of r66 (36k - which is activated with voltage=1) to 50k, and change r139 (33k - stock or voltage=0) to 38k-40k. What this would (in theory) is allow the gridseed to run at a slightly higher voltage which should let it reach 1000Mhz for dual mode (and not let out the magic blue smoke), and enable the use of voltage=1 parameter to set the VID to use r139 (49.9k/50k) to raise the voltage enough to allow 1200Mhz+ for scrypt mode.

Anyone is welcome to take this idea and run with it. I'm working on getting funds together for another gridseed since I can't really determine stability on the one the mosfet blew on.

EDIT: Obviously the merit of using voltage=1 would be if you don't have physical access to the gridseeds and wanted to switch from dual mining to scrypt, it could be done via software in cgminer.

Hey nst6563, when did you first have this idea and when did you write about it on here?

happydaze

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Is the point I've drawn the arrow to in this photo supposed to be bridged or not from the factory? I'm troubleshooting one of my gridseeds that has a few more errors than the others and I previously poked around that spot by mistake. I just can't see it well enough to tell if it is bridged or not. Any help would be much appreciated.

ZiG

sr. member

Activity: 406

Merit: 250

Quote from: gtraah on April 23, 2014, 01:15:23 AM

Thanks Zig, No I was not planning to put the 49.9k there but in the 139k position... If I find it EXTREMELY difficult then I will wait for the other ones >>> 16.9K to come in the mail.

16.9Kohm @ R46 = 49.9kohm @ R139 ?? Thats the exact equivalent right?

By the way there are no markings on the 49.9k But there is a Blackside and a White Side.

I am 99.9999999% sure the upside is the black side as this is what was facing up in the pack. Plus it will look VERY weird the White side facing up.

No Markings...At all...it is strange... Shocked

Yeah...the UP side...Black...as on the tape...is UP...LOL... Grin

Happy ~~Easter~~ ...modding...I mean...

EDIT ...: Yes...the R139 NEW value should be 49.9K (50K)...it is Marked as R139 on the board ("R52" on the top...R139 on the bottom of the board) and same R139 on the schematics...But the Value is 33KOhm...You should take this out and replace with 49.9K...Nemercry single resistor Mod...Don't mix with mine...

gtraah

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Activity: 420

Merit: 250

Thanks Zig, No I was not planning to put the 49.9k there but in the 139k position... If I find it EXTREMELY difficult then I will wait for the other ones >>> 16.9K to come in the mail.

16.9Kohm @ R46 = 49.9kohm @ R139 ?? Thats the exact equivalent right?

By the way there are no markings on the 49.9k But there is a Blackside and a White Side.

I am 99.9999999% sure the upside is the black side as this is what was facing up in the pack. Plus it will look VERY weird the White side facing up.

ZiG

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Activity: 406

Merit: 250

Quote from: gtraah on April 23, 2014, 12:39:56 AM

Quote from: ZiG on April 22, 2014, 10:04:31 PM

0402 (1005 metric): 1.0 mm × 0.5 mm (0.039 in × 0.020 in). Typical power rating for resistors = 0.1 [8] or 0.062 watt[9]
0603 (1608 metric): 1.6 mm × 0.8 mm (0.063 in × 0.031 in). Typical power rating for resistors = 0.1 watt[8]

Reference ...:

http://en.wikipedia.org/wiki/Surface-mount_technology

Hey Zig,

The 0603 would be easier right and at-least its larger?

Dam I just got my 49.9k resistor delivered now HMMM i am anxious to do this

Does it matter which way the resistor is facing up or down. I really doubt it matters but I just want to ask.

Also this looks right doesnt it? Aslong as it fits on the pads it will be fine? I am surprised no one got this one instead of the 0402, yes they are both small but atleast this is alittle bigger

RESISTOR THICK FILM, 16.9KOHM, 1%, 0603
Product Range: PANASONIC - ERJ Series
Resistance: 16.9kohm
Power Rating: 200mW
Resistance Tolerance: ± 1%
Resistor Case Style: 0603 [1608 Metric]
Resistor Element Material: Thick Film
Temperature Coefficient: ± 200ppm/°C
Voltage Rating: 150V
Packaging: Cut Tape
MSL: (Not Applicable)
SVHC: Diboron trioxide (19-Dec-2012)
SVHC (Secondary): Lead monoxide (lead oxide) (19-Dec-2012)

Yep...that's it...I believe that you should be able to fit them...

Top is always with the markings...UP...

EDIT...: ATTENTION Gtraah !!...DON'T try to solder 49.9K on R46 pads...IT IS TO BIG of a Value...You can BURN your Gridseed...YOU NEED 17K...but no MORE than 20K MAX...!!!

gtraah

sr. member

Activity: 420

Merit: 250

Quote from: ZiG on April 22, 2014, 10:04:31 PM

0402 (1005 metric): 1.0 mm × 0.5 mm (0.039 in × 0.020 in). Typical power rating for resistors = 0.1 [8] or 0.062 watt[9]
0603 (1608 metric): 1.6 mm × 0.8 mm (0.063 in × 0.031 in). Typical power rating for resistors = 0.1 watt[8]

Reference ...:

http://en.wikipedia.org/wiki/Surface-mount_technology

Hey Zig,

The 0603 would be easier right and at-least its larger?

Dam I just got my 49.9k resistor delivered now HMMM i am anxious to do this

Does it matter which way the resistor is facing up or down. I really doubt it matters but I just want to ask.

Also this looks right doesnt it? Aslong as it fits on the pads it will be fine? I am surprised no one got this one instead of the 0402, yes they are both small but atleast this is alittle bigger

RESISTOR THICK FILM, 16.9KOHM, 1%, 0603
Product Range: PANASONIC - ERJ Series
Resistance: 16.9kohm
Power Rating: 200mW
Resistance Tolerance: ± 1%
Resistor Case Style: 0603 [1608 Metric]
Resistor Element Material: Thick Film
Temperature Coefficient: ± 200ppm/°C
Voltage Rating: 150V
Packaging: Cut Tape
MSL: (Not Applicable)
SVHC: Diboron trioxide (19-Dec-2012)
SVHC (Secondary): Lead monoxide (lead oxide) (19-Dec-2012)

ZiG

sr. member

Activity: 406

Merit: 250

Quote from: happydaze on April 22, 2014, 11:40:39 PM

Thank you ZiG, that explains exactly what I saw happening. I'm new to this so lots to learn. I actually had to re-do the bridge again as the first re-do produced some errors when hashing. On the second re-do I could see a bit of copper and got a good solder bond. Now I know what to expect.

Wolfey - undoing this mod and going back to stock would be simply bridging the axial resistor at the solder points. You could even leave the resistor in place as you'd be bypassing it.
Also Wolfey, I did vmod1 (the two bridges) and ran dual mode 850MHz for half a day. SHA mode would take 1000 MHz but I could only get to 850MHz dual. 66 watts power consumption dual mode 850MHz vmod1. Kind of high and I'm not sure if it would shorten the device's life or not.

To sum up - you add one resistor with this mod. You don't remove any resistors. One bridge to reverse the mod if ever needed.

Thanks Happydaze for clarification...

I am happy that you, nemercry and some others are getting the concept and simplicity of my modding proposal...

I have been repeating the steps for this mod at least 10 times in my last postings, including (not very good ) drafts on the pictures of Sandor111...

Let me make another attempt to explain...this time with schematics...(excerpt from p.3 of the official Gridseed documentation ) ...here is the Voltage buck convertor / regulator ...with BLACK are the modifications...:

If somebody could not read the electronics schematics...fill free to ask the other participants in this thread...

Hope that helps for better understanding...or implementation...experimentation...whatever...

Enjoy... Grin

ZiG

EDIT...:

If you replace Rmod with Trimm(-er) Pot(-enciometer )...which is a Variable Resistor with Nominal value of 20K...one Could AJUST FINE and in a SMOOTH way the Voltage Supplied to the Gridseed chips...Capisco...?... Wink

wolfey2014

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Activity: 378

Merit: 250

Quote from: gtraah on April 23, 2014, 12:07:35 AM

Quote from: Ranma13 on April 22, 2014, 11:47:05 PM

I did the 49.9k resistor mod, but I'm having an issue:

For some reason, although the Gridseeds are running at 7.65 Mh/s collectively, I"m only getting around 3.6 Mh/s effective. It's like this no matter what pool I use. Is this normal, and if not, any idea on how I can fix it?

I heard this same issue with Bfg MIner, have you tried Cgminer?

cpuminer will solve this problem, I believe.
I've been using it for months and it works great!

gtraah

sr. member

Activity: 420

Merit: 250

Quote from: Ranma13 on April 22, 2014, 11:47:05 PM

I did the 49.9k resistor mod, but I'm having an issue:

For some reason, although the Gridseeds are running at 7.65 Mh/s collectively, I"m only getting around 3.6 Mh/s effective. It's like this no matter what pool I use. Is this normal, and if not, any idea on how I can fix it?

I heard this same issue with Bfg MIner, have you tried Cgminer?

I use Cgminer which shows the Hashrates and works perfectly

wolfey2014

sr. member

Activity: 378

Merit: 250

Quote from: happydaze on April 22, 2014, 11:40:39 PM

Thank you ZiG, that explains exactly what I saw happening. I'm new to this so lots to learn. I actually had to re-do the bridge again as the first re-do produced some errors when hashing. On the second re-do I could see a bit of copper and got a good solder bond. Now I know what to expect.

Wolfey - undoing this mod and going back to stock would be simply bridging the axial resistor at the solder points. You could even leave the resistor in place as you'd be bypassing it.
Also Wolfey, I did vmod1 (the two bridges) and ran dual mode 850MHz for half a day. SHA mode would take 1000 MHz but I could only get to 850MHz dual. 66 watts power consumption dual mode 850MHz vmod1. Kind of high and I'm not sure if it would shorten the device's life or not.

To sum up - you add one resistor with this mod. You don't remove any resistors. One bridge to reverse the mod if ever needed.

Right, makes sense. I first duplicated Sandor111's mod. He was the first one out with it. Then someone else, then Nemercry, then Me, then Zig and who knows who's next to come out with a new / better mod.
Lots of others have contributed to this whole thing since. And lets not forget the ones who asked if it was possible in the first place. Got some creative minds going and, look where we are now?

I for one feel that worrying about being able to switch these little seeds back to SHA or even DUAL mode is a waste of time, effort and worry over if/when SHA returns to general profitability. I doubt btc is ever going to go back to the good ol' days when even ANTs could make money mining it.
I'm running my miners flat out on Scrypt, achieving ROI and using the profits to upgrade to newer and better and faster and cheaper miners and eventually I will end up with a 2 or 3THs miner to finally hit btc or some other then hot SHA or Scrypt-N or Jane or what ever the heck algorithm.
The thing to keep firmly in mind is these are being modded for higher profits! So we can all ROI sooner than before. That's really all this is about. Mining for profit.
Mod them, mine them! Make profits! After they are not able to produce much profits anymore, they will eventually end up as paper weights or window ornaments or maybe even UFO's! Antiques!

Topic: GridSeed 5-chip USB miner voltage mod - page 35. (Read 156988 times)