Topic: GridSeed 5-chip USB miner voltage mod - page 58. (Read 156988 times)

Here are some pics of a modded unit. (Modded 2 now. This being the second one)




Not 100% amazing (I left it this way to show that you don't need to have a perfect solder) but it works 100%

I'm running this one at 1225Mhz and its minning at ~450Kh/s (client side) and ~500Kh/s (server side). This is still better than stock hash levels. I'll try to find the sweet spot on these units.

Unfortunately, not everyone is going to achieve the same results.
Also, I'm using cpuminer.
Here's a couple pics of recent stats taken today at various times.
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I'm using doge.wannamine.com
Hope your hash rates improve!
Good luck!

I got my 49.9k %1 resistors today in the mail (Bought them at digi-key)

So far, I modded 1 unit. I'm running it at 1175Mhz. It's hashing at ~425kh/s (Client side) and ~400kh/s server side. Not sure how Wolfey got +500kh/s but so far, I'm getting no where near it. I guess its a pool thing? What pool are you using Wolfey?

Thanks!

Yes, do this single resistor mod by itself. It's all that is required.
Good luck!

Can I do this mod by itself or does it need more mods to go along with it? I already ordered the resistors to do this mod and I will probably do the 5v fan mod as well

Yes, if placed like I did, it will be fine. 1 or 2mm clearance at least.

Zor, you're gonna have to find a soldering iron with a fine tip.
I can't help you find one. You're on your own, I'm afraid.
Unless someone else on here cares to guide you.
Good luck with your mod!

will also be doing this mod once I am free... Also wondering if the resistor have good clearance from the heatsink?

You Sir, are awesome.

Recommend gear on Amazon for me to buy to perform such an operation?  =D  I'd practice first -- I do have steady hands, though.

Yeah cause I just opened a gridseed and man those SMD are tiny 

I've soldered before small things but this I'm going to pass it to a local shop it's too smal for me  don't have the appropriate tools for this

Well, lookee here! Your prayers have been answered!
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I'm sure this zoom in, along with the fan mod pic on page 14 and resistor placement on page 25 of this thread will help you.

Thanks for posting that pic Jamieb81

Thanks for the complement Zor!  

Let me know if there is anything else I can do to help!

And remember folks, I do over-volt mods - enabling stable overclocking - for you, if you can't do it yourself.
PM me for further details.

Wolfey2014

From this image I think it seems pretty clear.

one part of the resistor is on the top little round dot ( there are two little dots ) and the other part of the resistor is soldered on the inward

of the smd connexion point of the board.

: <- top point  . .   -> right one

don't know if you got it like this^^

I sure wish you had a more high rez picture there Wolfey so I could see exactly what you've done.  I blowed it up in Photoshop but it's blotchy.  Nice work nonetheless.

I wish I could see exactly where you soldered the axial resistor.  Any guide for this particular volt mod?  I've been all over this thread ... if I need to re-read, what, 26 pages or so, tell me to.  lol

It looks like you soldered from which point I'm not sure, to one of those 3 pads.

Here is my post...

https://bitcointalksearch.org/topic/m.6027770

No pics...sorry...

Got my 2nd gridseed today.. its performance seems a little worse than my first one..

Hardware	Mining time	Freq.	HW Errors
Gridseed #1 (Big LEDs)	3 hours	875 MHz	0
Gridseed #2 (SMD LEDs)	3 hours	850 MHz	23

..perhaps the thermal pads are not positioned well in the new unit. Can someone recommend a thermal grease I can't seem to find on that isn't labelled as "conductive" .. although its hard to tell if they mean thermally or electrically conductive..

I replaced the thermal pad with paste on my miners, but I can't see any difference, although their running rock solid after the voltage mod (they ran solid before). I thought it can't do any harm. Use a non-conductive paste, that's important!

But beware, one of my coolers had such a rough surface that I kept the thermal pad and applied the paste additionally, but very thin.

Sorry, no pics!

Hello all,

I read a post (I think was here), where an user stated that they applied thermal paste onto the gridseed. I just overclocked my units and I'm a bit hesitant to keep them running at max settings without proper cooling.

Has anyone here cooled their unit with thermal paste? If so, how are you doing it? (Pics please?)

Many Thanks!

Thank you for your kind words, buddy...Glad to share...I saw you applying thermal paste too...

Most of the thanks should go to you, Nemercry...for your contributions to this tread and your research and results...!

Much appreciated...

BTW, could you please post what is the Voltage supplied to the chips VDD+ after your 47k resistor mod...?  

Cheers,
ZiG

I just completed modding several GS5 pods for a customer and they are all now hashing away as expected.
Easily running over 500KH/s to over 650KH/s as expected. I've even seen peaks of over 750KH/s!
ZERO HW errors on all of them.
This includes the 5V fan mod as well.
After tuning them all up, I'm seeing 1150MHz to 1250MHz as the most stable and profitable general operating range.
If you'd like me to mod your pods, feel free to PM me.
I'm located 30 minutes outside of Washington D.C.

Here's a shot of my handy work, if you want to see how to do the mod yourself.
Like I've been saying, a 1/4W resistor will work just fine. Try to use 1% tolerance.
There is no point in going crazy with tiny SMD resistors and the hassles and expense of buying much less using a hot air station that if not used properly can destroy your miner!
A simple 30W soldering iron with a pencil tip will do the job perfectly. It will remove the old resistor chip and easily solder the new axial resistor in place without any risks to damaging other components. It takes a steady hand and experience to do it correctly in any case.
49.9K seems to be a pretty good general setting for overclocking up to 1250 stable.
Any higher than 1175MHz to 1200MHz seems to be a waste at the pool i.e. wasted power, lower profits.

I can mod your pods for you at a very reasonable cost. PM me for details.
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Positive and Profitable Results using standard 1% to 5% 1/4 watt axial resistor!
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Here's a close up shot so you can see exactly where to put R52.

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My current peak performance figures pool side with just 6 miners...


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Remember, if you want your pods modified and can't do it yourself, I can!
PM me for details!

Can someone help me with setting the frequencies for each module in cgminer? I have 3 modules 2 are stable at 900mhz and 1 is stable at 850mhz I'm using windows 7 and cgminer 3.7.2 for gridseed thanks in advance.

i think it can be blowed away for sure if you use wrong size nozzle and apply too much air flow. specially cheapo stations may have problems on regulating air flow precisely. using a tape is a very good idea! just to be sure that something unnecessary isn't blowing away..