Bitcoin Forum

Orginial topic:
http://www.cybtc.com/thread-7093-1-1.html

Cybtc Pro-Test:
. 1 Windows version default overclocked version CPUMiner - Cybtc Pro-Test(1)(6/3)
http://www.cybtc.com/thread-6601-1-1.html
. 2 Windows version default overclocked version CGMiner3.7.2 - Cybtc Pro-Test(2)(7/3)
http://www.cybtc.com/thread-6630-1-1.html
. 3 Hardware Overclocking of Gridseed Miner - Cybtc Pro-Test(3)(26/3)

Quote from:
http://cryptomining-blog.com/1598-voltmod-update-for-the-gridseed-5-chip-btcltc-asic-miners/

The article mentioned to use a soldering the part at green box for link up ... ;

http://www.cybtc.com/data/attachment/forum/201403/29/092445gzcnzuihoblucknc.jpg

Some components on circuit boards may be damage by high temp.. With my technique , it's a great opportunity to break the component...,so I use silver paint ... ;

http://www.cybtc.com/data/attachment/forum/201403/29/092441hkacuakuc2kkfkyo.jpg

Methods refer to the diagram , but I was with a needle inserted into the syringe , dip silver paint , then painted to the required place ;

http://www.cybtc.com/data/attachment/forum/201403/29/092438e44cbhi5eez326zc.jpg

After the completion,  use a multimeter to measure, make sure 2 points is connected ... ;

Software with this threat :
http://cryptomining-blog.com/1662-updated-cgminer-3-7-2-oc-for-mining-on-gridseed-5-chip-gc3355-asics/

There is an updated version , but I have not tried ... :
http://cryptomining-blog.com/1688-alternative-cgminer-3-7-2-for-scrypt-mining-on-gridseed-5-chip-gc3355-asics/

In the orginal article mentioned, plus an additional parameter in BAT were as follows :
cgminer.exe - scrypt-o stratum + tcp :/ / stratum.scryptguild.com: 3333-u worker-p xxx - gridseed-options = baud = 115200, freq = 975, voltage = 1, chips = 5 - hotplug 0

I have not add this parameter as it seems increase HW ERROR a lot, you can try yourself...

overclock to  950MHz, output 404.9kHz, HW ERROR = 7 / (10688 +320 +7) * 100 = 0.0635%

http://www.cybtc.com/data/attachment/forum/201403/29/092408bxpopok7rngx88np.jpg

Silver paint? As in actual paint, specific type? I didnt realize a silver colored paint had actual silver in it. Can you please elaborate on the actual paint you used

http://www.amazon.com/CircuitWriterTM-Precision-Pen-silver-based-grams/dp/B0002BBVQO/ref=sr_1_10?ie=UTF8&qid=1396127909&sr=8-10&keywords=liquid+solder

idk if this is the specific kind

Just tried looking for it too.  This one seems to match the syringe and needle tip ($3 shipped from HK):

http://www.amazon.com/0-2ML-Silver-Conductive-Electrically-Repair/dp/B00HNHUZ08

Has anyone done this? Really considering doing this to one of my units and seeing how it goes. I have 80 so losing one wouldnt kill me. Would be nice to get an extra bit from all 80  ;D

I tested the CircuitWriter from Amazon - it does work, but probably not worth the effort. You need at least 3 layers to get any reasonable conductivity, each layer takes hours to cure, it's thin and runny, there isn't really enough space to tape it off.  It might be an acceptable option if you can't solder to save your life (like myself) and only have a handful of Gridseeds to modify, but anything beyond that is better done by soldering or paying someone to do it. Having said that, I did manage to modify a couple of Gridseeds with the CircuitWriter and they are happily hashing at 950 MHz (400 KH/s).

Try shaking the hell out of the circuitwriter. I heard the conductive elements congeal and you get left with minimally conductive solvent. You really have to shake them up a ton or they will be runny and have lower conductivity. Maybe this would fix you having to do 3 layers?

Oh believe me I was shaking it like crazy for a couple of minutes :). I think the pen format kind of limits how viscous it can be. It needs to be able to get through that small hole. And it thins out even more as it cures, so then even a tiny scratch will break it. I did some testing on a scrap piece of PCB and was able to get it conductive with one layer, but it would spread out too much to be able to do the same on the Gridseed.

Still not a bad result, I didn't think it would work at all.