GridSeed 5-chip USB miner voltage mod - page 74.

wolfey2014

sr. member

Activity: 378

Merit: 250

Quote from: jamieb81 on March 24, 2014, 01:06:22 PM

Same for me, pencil and bridge mod is pretty straight forward. resistor way less. And I also have the import duty problems, cannot send them to USA.

will this resistor be ok wolfey?

http://www.ebay.fr/itm/20-Resistenze-da-526-ohm-1-8-W-5-lotto-stock-/261430407080?pt=Componenti_elettronici_passivi&hash=item3cde776fa8

Same type but it has to be 38K to 40K.
I'm using 38K

Just like it says in the instructions located on page 6

Good luck, mate!

Wolfey2014

david123

legendary

Activity: 1036

Merit: 1005

Yeah, for changing the resistor a hot air soldering station is very useful. I wouldn't try it with without.

jamieb81

sr. member

Activity: 308

Merit: 250

Same for me, pencil and bridge mod is pretty straight forward. resistor way less. And I also have the import duty problems, cannot send them to USA.

will this resistor be ok wolfey?

http://www.ebay.fr/itm/20-Resistenze-da-526-ohm-1-8-W-5-lotto-stock-/261430407080?pt=Componenti_elettronici_passivi&hash=item3cde776fa8

Jemison

newbie

Activity: 8

Merit: 0

Quote from: vabchgent on March 24, 2014, 12:39:08 PM

Quote from: Jemison on March 24, 2014, 10:50:30 AM

Quote from: wolfey2014 on March 24, 2014, 09:30:45 AM

Quote from: SVK on March 24, 2014, 08:40:25 AM

Hi all,

thank you very much for sharing your modifications

I can't find 5% resistor so would 1% resistor be ok ?
http://www.ebay.co.uk/itm/VISHAY-DRALORIC-CRCW120638K3FKEA-RESISTOR-1206-38K3-1-/181228512324?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item2a320fa444

Thank you very much

Yes, 1% will work fine.
Still, it's just as easy, if not easier to install a standard axial 1/8W resistor in there.
You can bend the wires into an L shape to then bridge solder them on to the two terminals side by side.
They are wired in parallel as there is supposed to be a capacitor next to each resistor per the schematic.
I verified this with my DVM by the way. So that gives you two solder points per connection to fudge the resistor in place.
Much easier than working with nearly microscopic size resistor chips IMO. Wink

Plus you can buy them at Radio Shack. Wink

1/4W will work fine too.
Just keep the resistor inside the edge of the pcb so the fins won't touch it when re-assembled.
Piece of cake!
Wolfey2014

Pea Ess, remember, mods' are done at your own risk!

Hi Wolfey,

I'm interested in attempting this mod, but have no experience with soldering on boards.
Can you post a pic of you mods and would you mind providing a near-idiot-proof guide with
the equipment and steps required to make the change.

Obviously with the usual caveat of no guarantees, warranties, etc. Wink

Thanks!

Your best bet is to have someone else do it If you have no experience with soldering. I do laptop power jacks and I had a problem with these. Just a friendly suggestion. I think Wolfey is offering it as a service. You might want to ask him.

Understood!

A month ago, I would never have attempted to build a mining rig, but thanks to this forum, I'm up and running with relatively few hitches.

I saw Wolfey's offer - unfortunately, I'm not in the US - so it would cost me a few for shipping & duties.

The pencil mod seems fairly straightforward. The resistor mod has me intimidated. Having the steps would help me figure out if it's even something I'd attempt.
I'd probably experiment on some old boards for confidence/experience. In the end, if it's beyond my skill level, maybe I'll just stay one of the slow pokes!

wolfey2014

sr. member

Activity: 378

Merit: 250

I've been thinking about offering new pods with the mods Wink

If there is a market for this, I just might do it!
I certainly can do these mods without bricking them....
I'll have to test run each pod before and after modding, before releasing them to the customer.

I'll probably have to charge around $50 a pop, including shipping perhaps, to cover all costs.
Might be able to do it for less though. We'd have to see how it pans out.
This would include the whisper quiet 5V fan modification too. These would be Scrypt only mods!
If you wanted to mine SHA, you'd probably have to covert the fan back to 12V operation.
But, that gives me another idea...... Wink

I suppose I could have the customer drop ship their order to me here, do the mods then ship them to the customer.

One could certainly recover the cost per unit in a matter of a couple weeks I would think.

We can do all payment transactions via paypal, so everyone is covered and confident.

Wolfey2014

david123

legendary

Activity: 1036

Merit: 1005

In my opinion it's more important to have the right equipment. If you have a high quality soldering station and a 0.5 mm tip, it's quite
a straight-forward task..

vabchgent

sr. member

Activity: 840

Merit: 251

Quote from: Jemison on March 24, 2014, 10:50:30 AM

Quote from: wolfey2014 on March 24, 2014, 09:30:45 AM

Quote from: SVK on March 24, 2014, 08:40:25 AM

Hi all,

thank you very much for sharing your modifications

I can't find 5% resistor so would 1% resistor be ok ?
http://www.ebay.co.uk/itm/VISHAY-DRALORIC-CRCW120638K3FKEA-RESISTOR-1206-38K3-1-/181228512324?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item2a320fa444

Thank you very much

Yes, 1% will work fine.
Still, it's just as easy, if not easier to install a standard axial 1/8W resistor in there.
You can bend the wires into an L shape to then bridge solder them on to the two terminals side by side.
They are wired in parallel as there is supposed to be a capacitor next to each resistor per the schematic.
I verified this with my DVM by the way. So that gives you two solder points per connection to fudge the resistor in place.
Much easier than working with nearly microscopic size resistor chips IMO. Wink

Plus you can buy them at Radio Shack. Wink

1/4W will work fine too.
Just keep the resistor inside the edge of the pcb so the fins won't touch it when re-assembled.
Piece of cake!
Wolfey2014

Pea Ess, remember, mods' are done at your own risk!

Hi Wolfey,

I'm interested in attempting this mod, but have no experience with soldering on boards.
Can you post a pic of you mods and would you mind providing a near-idiot-proof guide with
the equipment and steps required to make the change.

Obviously with the usual caveat of no guarantees, warranties, etc. Wink

Thanks!

Your best bet is to have someone else do it If you have no experience with soldering. I do laptop power jacks and I had a problem with these. Just a friendly suggestion. I think Wolfey is offering it as a service. You might want to ask him.

gamefixer

sr. member

Activity: 440

Merit: 250

Quote from: Jemison on March 24, 2014, 10:50:30 AM

Hi Wolfey,

I'm interested in attempting this mod, but have no experience with soldering on boards.
Can you post a pic of you mods and would you mind providing a near-idiot-proof guide with
the equipment and steps required to make the change.

Obviously with the usual caveat of no guarantees, warranties, etc. Wink

Thanks!

I'd like to see pics anyway.

FYI, the solder pads on this board are pretty small. Your usual suspect soldering iron isnt really going to cut it.

Jemison

newbie

Activity: 8

Merit: 0

Quote from: wolfey2014 on March 24, 2014, 09:30:45 AM

Quote from: SVK on March 24, 2014, 08:40:25 AM

Hi all,

thank you very much for sharing your modifications

I can't find 5% resistor so would 1% resistor be ok ?
http://www.ebay.co.uk/itm/VISHAY-DRALORIC-CRCW120638K3FKEA-RESISTOR-1206-38K3-1-/181228512324?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item2a320fa444

Thank you very much

Yes, 1% will work fine.
Still, it's just as easy, if not easier to install a standard axial 1/8W resistor in there.
You can bend the wires into an L shape to then bridge solder them on to the two terminals side by side.
They are wired in parallel as there is supposed to be a capacitor next to each resistor per the schematic.
I verified this with my DVM by the way. So that gives you two solder points per connection to fudge the resistor in place.
Much easier than working with nearly microscopic size resistor chips IMO. Wink

Plus you can buy them at Radio Shack. Wink

1/4W will work fine too.
Just keep the resistor inside the edge of the pcb so the fins won't touch it when re-assembled.
Piece of cake!
Wolfey2014

Pea Ess, remember, mods' are done at your own risk!

Hi Wolfey,

I'm interested in attempting this mod, but have no experience with soldering on boards.
Can you post a pic of you mods and would you mind providing a near-idiot-proof guide with
the equipment and steps required to make the change.

Obviously with the usual caveat of no guarantees, warranties, etc. Wink

Thanks!

wolfey2014

sr. member

Activity: 378

Merit: 250

Quote from: SVK on March 24, 2014, 08:40:25 AM

Hi all,

thank you very much for sharing your modifications

I can't find 5% resistor so would 1% resistor be ok ?
http://www.ebay.co.uk/itm/VISHAY-DRALORIC-CRCW120638K3FKEA-RESISTOR-1206-38K3-1-/181228512324?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item2a320fa444

Thank you very much

Yes, 1% will work fine.
Still, it's just as easy, if not easier to install a standard axial 1/8W resistor in there.
You can bend the wires into an L shape to then bridge solder them on to the two terminals side by side.
They are wired in parallel as there is supposed to be a capacitor next to each resistor per the schematic.
I verified this with my DVM by the way. So that gives you two solder points per connection to fudge the resistor in place.
Much easier than working with nearly microscopic size resistor chips IMO. Wink

Plus you can buy them at Radio Shack. Wink

1/4W will work fine too.
Just keep the resistor inside the edge of the pcb so the fins won't touch it when re-assembled.
Piece of cake!
Wolfey2014

Pea Ess, remember, mods' are done at your own risk!

wolfey2014

sr. member

Activity: 378

Merit: 250

Quote from: gamefixer on March 24, 2014, 05:35:44 AM

Quote from: wolfey2014 on March 23, 2014, 11:57:59 PM

I'm very pleased with their stable performance at 1000MHz!
Running it solo, I'm seeing nearly 600KH's out of it at the pool. Wink

NICE!

So, what's next? How do we squeeze more performance out of them? Any ideas?
I'm game!

Peace!
Wolfey2014

Dayum! Your getting 600k out of ONE of them? Real nice!

Yep! Weird, eh? Huh

The pool is showing 657.04KH/s right now for this single
I doubt it will show that high of a hash rate while combined with the others.
Still, it's very interesting to see that kind of performance out of a single pod - post mods'.
Wolfey2014 Grin

SVK

sr. member

Activity: 378

Merit: 250

Hi all,

thank you very much for sharing your modifications

I can't find 5% resistor so would 1% resistor be ok ?
http://www.ebay.co.uk/itm/VISHAY-DRALORIC-CRCW120638K3FKEA-RESISTOR-1206-38K3-1-/181228512324?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item2a320fa444

Thank you very much

gamefixer

sr. member

Activity: 440

Merit: 250

Quote from: david123 on March 24, 2014, 06:17:19 AM

Quote from: wolfey2014 on March 23, 2014, 11:57:59 PM

They run sufficiently warm enough now that I put the fan back on them but am running them off the 5V USB with good results.

Can you explain where you took the 5V from? I mean, where did you attach the red cable on the PCB?

One pin on the USB connector will be supplied +5VDC from either the hub or the computer that your grid is plugged into. Thats what he's talking about. Not sure which pin, probably pin 1 or pin 4.

david123

legendary

Activity: 1036

Merit: 1005

Quote from: wolfey2014 on March 23, 2014, 11:57:59 PM

They run sufficiently warm enough now that I put the fan back on them but am running them off the 5V USB with good results.

Can you explain where you took the 5V from? I mean, where did you attach the red cable on the PCB?

gamefixer

sr. member

Activity: 440

Merit: 250

Quote from: wolfey2014 on March 23, 2014, 10:33:09 PM

Hey, maybe you can help me set up cgminer or bfgminer for my pods.
I'm considering doing it just so I can see real time client side hash rates.
To bad they didn't build it into cpuminer. Sort of weird it's not standard.

Wolfey2014

I'd be happy to help. Do you have dropbox? setup a shared folder for me and I'll dump bfg and cg in there.

FWIW, I'm finding bfgminer easier to use. With cgminer you have to start it with the grids UNPLUGGED, then plug them in and let it find them. You also have to change the driver from whatever's factory to WinUSB so if you want to go back to cpuminer you have to delete the thing and re-install it.

pm me for my email address if you want to setup dropbox.

You can also download the two programs but I'm too lazy to look up the links right now.

Oh wait.... I think you have to use cgminer with the volt modded grids. Theres a line in the config file (or bat file) that you have to change from voltage=0 to voltage=1 or something like that.

gamefixer

sr. member

Activity: 440

Merit: 250

Quote from: wolfey2014 on March 23, 2014, 11:57:59 PM

I'm very pleased with their stable performance at 1000MHz!
Running it solo, I'm seeing nearly 600KH's out of it at the pool. Wink

NICE!

So, what's next? How do we squeeze more performance out of them? Any ideas?
I'm game!

Peace!
Wolfey2014

Dayum! Your getting 600k out of ONE of them? Real nice!

wolfey2014

sr. member

Activity: 378

Merit: 250

Quote from: sandor111 on March 20, 2014, 09:35:57 PM

Quote from: wolfey2014 on March 20, 2014, 08:54:30 PM

Quote from: sandor111 on March 20, 2014, 08:53:52 AM

I am giving out 0.6BTC to the first to get his Gridseed miner stable at 1100 MHz (<10 HW error in 24h) and post the steps to mod the miner. So far I have managed to get it stable at 1013 MHz, but I feel we can push it further.
I have found the only way to push these further is by replacing the 36k resistor with a higher one and playing with PLL voltage, you need to lower the resistance of R211 or R212 by tracing it with a pencil. Measure the voltage across both resistors and it should be around 1.1v total. If you want to increase PLL voltage, trace R212, to decrease it, trace R211 (go back and forth atleast 10-20 times or you will not notice a change). Simply use an eraser to revert the mod. Personally 1.05v seems sweet spot.

Disclaimer: as always, I am not responsible for damage to your miner, do this at your own risk!

What is the test point on the card for checking/monitoring the voltage?

Thanks
Wolfey2014

Core voltage can be measured across the 36k, assuming it's voltmodded (by default it would be the 33k)
PLL voltage can be measured across R211 and R212.

Hello Sandor.
I made the modifications to 2 of my GS5 USB's.
Both jumpers done.
38k @ 5% resistor added in place of the original. I used a 1/8W linear type.
Pencil traced R112 to lower PLL voltage to 1.018 or so -virtually zero red nonce's.
I've never used the pencil trick before. Amazingly effective. Just hope its permanent.
1.05 seemed to high as it still got some red nonce's.
Both GS5's are rock steady for over 40 hours now. No problems at all.

They run sufficiently warm enough now that I put the fan back on them but am running them off the 5V USB with good results. Only pulling about 78mA. 140mA surge at start up but it lasts less than 2 seconds. They are whisper quiet and provide enough air volume to keep them nice and room temp cool. They were running at nearly 118*F fanless as expected after the mods.
I'm sure they can run hotter than that without problems but I also didn't want to just let the fans go to waste Wink

I'm very pleased with their stable performance at 1000MHz!
Running it solo, I'm seeing nearly 600KH's out of it at the pool. Wink

NICE!

So, what's next? How do we squeeze more performance out of them? Any ideas?
I'm game!

Peace!
Wolfey2014

wolfey2014

sr. member

Activity: 378

Merit: 250

Quote from: gamefixer on March 23, 2014, 09:54:58 PM

Quote from: wolfey2014 on March 23, 2014, 09:47:12 PM

Yo GF!

I didn't want to wait, eh? I waited. Wink

Yep, have 2 of them fully modded as of this afternoon. Decided to mod the 2nd one after I got back from a job and all my chores were done.
I've had rock steady performance with a way less resets/restarts over the last couple weeks since tweaking things up.
Still dealing with resets every 24 or so hours though but no where near as much as before and, certainly not as often as you evidently have to reset yours.
I have been using cpuminer Scrypt only version for weeks now. Works perfectly. Especially for those who have a few or up to 20 GS units.
Batch files can do all the tasks required including resetting and re-staring them.
It's probably not your GS5's causing the fuss. It could be port settings, it could be bfgminer. I read lots of complaints about it all the time. It's a tweaker's / debugger's dream program though, I guess Wink

.

I'm very pleased with the performance of the 2 miners I've modded so far.
Rock steady performance. Virtually ZERO HW errors. In fact, I haven't seen any in hours. Certainly no more than running them at 850 or even 600MHz.
That's a good thing!

Can I do anything to help you figure out whats going on and get your miners stably producing some income?

Fret not. Ayething go be aueight! Cheesy

Wolfey2014

I've isolated the 4 that are giving me crap (well I know for sure where one is). I too have been using cpuminer since I got these things but I noticed that some of them were saying "yay" more and had higher accepts within cpuminers command box. Thats when I started using cgminer and bfgminer to see if I could nail down the bad grids. I thought that maybe putting 10 on three different computers was going to solve my problems but it didnt. Just logged into the host PC's and the 4 that I noted as acting up this afternoon were in fact claimed "dead" by bfg.

For what its worth zoomhash is going to replace them, I just have to ship the bad ones back to them.

What sized iron are you guys using to solder those bridges? Those are pretty small solder pads.

Okay. Sounds like you have things under control.
Bet knowing wtf was happening is a relief, eh? Wink

The iron I use has two different type tips. Soldering the bridges and the resistor replacement are easy if you know what you're doing and have a steady hand. A pair of magnifying lenses helps too Wink

I'm using my faithful WSL Weller soldering station.
It uses the Weller Pencil Micro Soldering WMP, for WSL station iron.

I don't know if you can find a decent 40W iron with a decently fine tip or not.

Hey, maybe you can help me set up cgminer or bfgminer for my pods.
I'm considering doing it just so I can see real time client side hash rates.
To bad they didn't build it into cpuminer. Sort of weird it's not standard.

Wolfey2014

gamefixer

sr. member

Activity: 440

Merit: 250

Quote from: wolfey2014 on March 23, 2014, 09:47:12 PM

Yo GF!

I didn't want to wait, eh? I waited. Wink

Yep, have 2 of them fully modded as of this afternoon. Decided to mod the 2nd one after I got back from a job and all my chores were done.
I've had rock steady performance with a way less resets/restarts over the last couple weeks since tweaking things up.
Still dealing with resets every 24 or so hours though but no where near as much as before and, certainly not as often as you evidently have to reset yours.
I have been using cpuminer Scrypt only version for weeks now. Works perfectly. Especially for those who have a few or up to 20 GS units.
Batch files can do all the tasks required including resetting and re-staring them.
It's probably not your GS5's causing the fuss. It could be port settings, it could be bfgminer. I read lots of complaints about it all the time. It's a tweaker's / debugger's dream program though, I guess Wink

.

I'm very pleased with the performance of the 2 miners I've modded so far.
Rock steady performance. Virtually ZERO HW errors. In fact, I haven't seen any in hours. Certainly no more than running them at 850 or even 600MHz.
That's a good thing!

Can I do anything to help you figure out whats going on and get your miners stably producing some income?

Fret not. Ayething go be aueight! Cheesy

Wolfey2014

I've isolated the 4 that are giving me crap (well I know for sure where one is). I too have been using cpuminer since I got these things but I noticed that some of them were saying "yay" more and had higher accepts within cpuminers command box. Thats when I started using cgminer and bfgminer to see if I could nail down the bad grids. I thought that maybe putting 10 on three different computers was going to solve my problems but it didnt. Just logged into the host PC's and the 4 that I noted as acting up this afternoon were in fact claimed "dead" by bfg.

For what its worth zoomhash is going to replace them, I just have to ship the bad ones back to them.

What sized iron are you guys using to solder those bridges? Those are pretty small solder pads.

wolfey2014

sr. member

Activity: 378

Merit: 250

Quote from: gamefixer on March 23, 2014, 09:33:05 PM

Quote from: wolfey2014 on March 21, 2014, 05:59:14 PM

Actually, the term you're looking for is 'over-volted' not overclocked,,, which they are in fact.
850MHz is 250MHz over the stock - default setting of 600MHz. Wink

One of mine is now overvolted and further overclocked to 900MHz...running rock solid so far.
10 PM tonight will be its first successful 24 hour zero errors benchmark pass! Keep your fingers crossed folks!
Look ma! No fan! Grin

Wolfey2014

Guess you didnt want to wait anymore and decided to OV some grids huh wolfey?

Glad to see that its working out. Also glad I didnt do diddly to my grids as I've got 4-6 of them that keep crashing and going dead in bfgminer. Stupid things.

Yo GF!

I didn't want to wait, eh? I waited. Wink

Yep, have 2 of them fully modded as of this afternoon. Decided to mod the 2nd one after I got back from a job and all my chores were done.
I've had rock steady performance with a way less resets/restarts over the last couple weeks since tweaking things up.
Still dealing with resets every 24 or so hours though but no where near as much as before and, certainly not as often as you evidently have to reset yours.
I have been using cpuminer Scrypt only version for weeks now. Works perfectly. Especially for those who have a few or up to 20 GS units.
Batch files can do all the tasks required including resetting and re-staring them.
It's probably not your GS5's causing the fuss. It could be port settings, it could be bfgminer. I read lots of complaints about it all the time. It's a tweaker's / debugger's dream program though, I guess Wink

.

I'm very pleased with the performance of the 2 miners I've modded so far.
Rock steady performance. Virtually ZERO HW errors. In fact, I haven't seen any in hours. Certainly no more than running them at 850 or even 600MHz.
That's a good thing!

Can I do anything to help you figure out whats going on and get your miners stably producing some income?

Fret not. Ayething go be aueight! Cheesy

Wolfey2014

Topic: GridSeed 5-chip USB miner voltage mod - page 74. (Read 157002 times)