Updated cgminer 3.7.2 and cpuminer for Overclocking Gridseed 5-chip GC3355 ASICs

1 Apr
2014

cgminer-updated-version-for-overclocking

We have updated our windows builds of the cgminer 3.7.2 and cpuminer for Gridseed 5-chip GC3355 ASICs and you can download them below. Both versions include the latest official releases (cgminer source and cpuminer source) and in the source folder you can find our modified files for adding additional frequencies for overclocking if you want to compile from the source code yourself.

Both the cgminer 3.7.2 and cpuminer with Gridseed 5-chip GC3355 ASIC support the following frequencies that you can set to find what works best for overclocking the devices you have:

250, 400, 450, 500, 550, 600, 650, 700, 706, 713, 719, 725, 731, 738, 744, 750, 756, 763, 769, 775, 781, 788, 794, 800, 813, 825, 838, 850, 863, 875, 888, 900, 913, 925, 938, 950, 963, 975, 988, 1000, 1013, 1025, 1038, 1050, 1063, 1075, 1088, 1100, 1113, 1125, 1138, 1150, 1163, 1175, 1188, 1200, 1213, 1225, 1238, 1250, 1263, 1275, 1288, 1300, 1313, 1325, 1338, 1350, 1363, 1375, 1388, 1400.

You can download the latest cgminer 3.7.2 ALT for Gridseed ASICs on Windows OS here…
You can download the latest cpuminer for the 5-chip GC3355 ASICs for Windows OS here…



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14 Responses to Updated cgminer 3.7.2 and cpuminer for Overclocking Gridseed 5-chip GC3355 ASICs

Miner

April 1st, 2014 at 01:44

That is great! Thanks so much. I ‘m still running dual mode but will try this new cpuminer as soon as I get a chance.

Mod Scraper

April 1st, 2014 at 08:25

Re: Latest overclock hardware mods.
Remove all prior mods and restore to oem
Change out R52 to 47k 1%….. overclock to as high as 1150 – 1200 MHz stable!
No other mods are necessary!

admin

April 1st, 2014 at 10:08

Do note that the mod mentioned above will also increase significantly the power usage of the device.

ioan

April 1st, 2014 at 21:24

hello, i have tested, but speed its not hi, Single Mod for Bitcoin its 20GH/s normal
tested for Litecoin and max 399Kh/s

what its overclock?

Diggio

April 2nd, 2014 at 05:22

Appreciate you guys adding the extra frequencies. Spent several hours yesterday trying to compile some other downloaded code after adding all of the extra frequencies myself and kept running into various problems and I didn’t know if it was the right code, bad instructions, or…

While it’s not as easy to test overclocking, I’m running 60 of these off of one Windows system and you can watch for the red nonce errors in the 60 windows. With 60 running, every little bit helps. 9 of the 60 complain at 888 so this at least allows me to tweak each one if needed.

I’ll probably switch to CGMiner soon but cpuminer has been super stable and I like not having to monkey with the startup issues. Would be great to have CGMiner recognize the GridSeeds like cpuminer does.

Buddy

April 2nd, 2014 at 20:40

I notice this version of cgminer is very slow in bringing the hash rate to the maximum whereas the two version previous did it quickly

MK

April 4th, 2014 at 00:17

Is there a way to setup the frequency individually for each GS? I have 2 gs on 4 which are generating few HW, I want to lower freqncy on theses. Thanks.

admin

April 4th, 2014 at 00:57

Mk, yes, there is you need to use the following command line parameter, you essentially set the device by serial number and the frequency to work at:
--gridseed-freq 6D9426984857=988,6D9656774857=975

MK

April 4th, 2014 at 03:04

Thanks a lot, works fine. Also what are the reasons some of my gridseed are generating more or less HW than others?

bob johnson

April 5th, 2014 at 02:26

MK: are you using a multipool by chance? I noticed that when I mine on a single pool or single coin it does just fine with maybe 1-2 per day of HW errors, but as soon as I use a profit switching multipool then the HW errors seem to pop up almost after every coin switch.

MK

April 5th, 2014 at 05:12

@bob johnson: I’m trying differents pool. Yesterday I was on WMLTC, 1 HW. TOday I’ve switched to GHASH.io on multipool (beta) and I have 34 HW. Yes could be the issue, true.

MK

April 6th, 2014 at 07:41

@admin Some people noticed cgminer 3.7.2 display funny values?
Check http://pbrd.co/1imtEGZ … I’d love to have Ph/s but … it’s impossible with gs (either with vmod) :P

ryan

April 30th, 2014 at 07:03

I just got a few of these miners working, but it seems like the HW errors and rejects are really high with this build of cgminer.

Please see the screenshot here: http://screencast.com/t/igsv2vEEYA

Any idea why this is happening?

Veneficus

May 1st, 2014 at 07:44

I’ve just purchased 10 of these for $125 each. All of them were able to be clocked at 900Mhz with no HW errors and getting about 380khash/s at 950Mhz I was getting about 400khash but was getting 4-5 HW errors per device per hour.

The performance was pretty good, though the fans were very noisy. I desoldered the fans from 2 of the devices as many people are saying that the fan is no really required when running scrypt only. I disagree, with the fan removed I’m now getting about 25 HW errors per device pre hour.

cgminer 3.7.2 is pretty good with the overclocking, but I think I’m going to go with the Wiibox controller, I initially thought the Wiibox controller was pretty useless but after flashing it last night with LightningAcic v3 I think it’s better than cgminer 3.7.2. If only cgminer could add and Auto-overclocking feature.

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