Download cpuminer OC Edition for Gridseed 5-chip GC3355 ASICs

5 Mar
2014

cpuminer-gc3355-win32-fixed-oc-edition

A few days ago we have published a version compiled for windows of the cpuminer for the 5-chip Gridseed ASICs that fixed the power consumption when using the devices for Scrypt mining only (6-8W power consumption). This version has allowed the user to set the operating frequency of the chips inside up to 900 MHz and our unit seem to work best at 850 MHz as at 900 MHz is seems to have more HW errors. That however did not stop us from modifying the cpuminer to allow for even higher operating frequencies of the Gridchip GC3355 processors, so now we release an OC Edition of the cpuminer that will allow you to go all the way up to 1200 MHz operating frequency.

The OVERCLOCK EDITION we have made allows you to go for higher operating frequency above 900 MHz – you can try running the chips at 950, 1000, 1100 and 1200 (use the –freq=xxx command line parameter to set these frequencies). We have found our test miner to perform best with 850 MHz, however yours might be able to function at higher frequency without problems (many HW errors), so you might want to try higher than 900 MHz all the way up to 1200. At 1000 MHz the device consumes about 9W and at 1200 MHz the power consumption might go as high as 10W, so there should be no problem with the cooling, however the chips might not be able to run well at so high frequencies and can give more or only HW errors.

You can download the cpuminer OC Edition for the 5-chip GC3355 ASICs for Windows OS here…



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15 Responses to Download cpuminer OC Edition for Gridseed 5-chip GC3355 ASICs

Rowan

March 5th, 2014 at 03:19

Holy f**kballs!

Stine

March 5th, 2014 at 15:58

Is the red text output from cpuminer an error? For example:
0: <<< LTC : 552000000e4300acd12345678

It doesn't say invalid nonce like cgminer. Thanks! I have my Gridseed clocked to 850 MHz, and I pull right around 360k.

admin

March 5th, 2014 at 21:29

Stine, not a problem unless you see invalid nonce in red.

wolfey2014

March 6th, 2014 at 00:22

Well, seems that OCing these things is just a waste of time. All red nonce’s at 1000MHz and above.
Fairly unstable hence unusable performance at 900MHz too.
Nope, 850 is the stable sweet spot, with transmit buffer set to 14.
Good to go!

Now, if you guys could get on with explaining what the RED and GREEN LED’s indicate.
Make cpuminer show hash rate on screen in real time.
Make cpuminer show temperature on screen in real time.
Make cpuminer show fan speed (probably not possible with two wire fans)
Make cpuminer control fan speed as well as enable / disable fan.

Thanks for the great work!
Wolfey2014

admin

March 6th, 2014 at 03:04

wolfey2014, check the new cgminer 3.7.2 with gridseed support compiled for Windows (Scrypt only):
http://cryptomining-blog.com/1262-download-cgminer-3-7-2-for-windows-scrypt-mining-on-gridseed-5-chip-gc3355-asics/

Miner

March 21st, 2014 at 04:14

Thanks – this works well. Is it possible to have smaller overclock frequency increases in cpuminer to really fine tune each Gridseed like what you did with cgminer here: http://cryptomining-blog.com/1662-updated-cgminer-3-7-2-oc-for-mining-on-gridseed-5-chip-gc3355-asics/

Great blog – I visit every day!

Diggio

March 30th, 2014 at 23:56

Agree with miner; need a new version of cpuminer with smaller frequency increments–like 875 and 888. Where is the source of the overclocked version on cpuminer?

admin

March 31st, 2014 at 00:01

We can add the smaller frequency increments just like we did with the additional frequencies in the OC version, but with cpuminer it is hard to get a good idea about local hashrate or actual number of HW errors, so not that usable for overclock testing.

cmilian

April 8th, 2014 at 22:56

How do you set transmit buffer set to 14.

cmilian

April 8th, 2014 at 23:00

Will changing transmit buffer from 16 to 14 make a difference?

cmilian

April 8th, 2014 at 23:01

also, any ideas on why I can’t see the kh/s numbers on CPUMiner?

admin

April 8th, 2014 at 23:28

cmilian, changing settings is done from the COM driver via the Device Manager. As for why cpuminer does not support reporting of hashrate, well it just doesn’t have that coded inside… it was probably just a quick hack to add support for Gridseed ASICs.

ryan

April 28th, 2014 at 23:42

admin

April 28th, 2014 at 23:51

It is a common problem, most antivirus software detects and reports many of the miners based on cpuminer, cgminer etc. as possible viruses. If you wish you could just compile the miners from source, but you’d still get the same warnings.

lorenz

August 30th, 2014 at 13:05

Admin which is better? this cpumonster or the cpu miner with TUI made by sandor111 ?

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