Not sure. I have spend thousands on similar products for the FOREX market and at the end of the day none of them have been all that good. Also, I'm not convinced that there is enough volume to accurately predict trends in the ALT coin market.

Interesting. I started using the girnyau version recently but have not noticed this. Will take a closer look. The two versions are not much different from comparing the source code. The dtbartle version went away from setting static freq's and now support increments of 25. The version you referenced is an earlier build of dtbartle that had static freq.

I have considered forking the current dtbartle version with the per miner freq part of girnyau but am still undecided on doing static freq's or increments of 25. If I could figure out how to code increments of 5 that would be great. If static then there is not much benefit over just using girnyau's fork.

My miners are all over the map supporting freq's of 850 - 900+. Most of them do 863.

Are you basing your results on the pool reported hashrates? Contrary to what that one poster spams all over various threads the hashrate reported by pools are inaccurate and should not be used as a basis of your miners performance.

Edit: I'm not using a Pi. I found it too unreliable and like you mentioned about 10% lower hashrate.

Is he willing to sign a contract to this effect? Impose large penalties on breach.

This version supports "Per device frequency setting by serial number ":

https://github.com/girnyau/cgminer-gc3355

Ok, that explains why it was also showing such a high diff and huge hash rate at the time. These pools are hopping in for just a block? That's crazy. They get one block and the diff goes stupid high and no one finds the next one for hours... :/

Thanks vipgelsi!

...on second thought I think ill save myself the bother and get Male 18 AWG DC Power cords with 5.5x2.1mm connectors like miaviator suggested.

Word of caution: I just measured the DC power cord that came with my miners and they are NOT 18 AWG. My gauge only goes up to 18 AWG but I would guess they are 20 or 22 AWG. Fine for scrypt (I would imagine) but not dual or SHA mining.

Something like this should work:

100 FT 18 AWG GAUGE ZIP WIRE RED BLACK STRANDED COPPER POWER GROUND - $13.92

Strange..a block hasn't been found in over 3 hours!

Last block found: 2014-04-06 23:46:50
Time right now: 2014-04-07 03:00:26

I purchased 4 of the IBM power supplies. Plan to use the Offset Terminal Lugs miaviator discovered and these barrel plugs with 18 AWG wiring:



Any tips on where to buy the wiring? Home Depot did not have any 18 AWG and Radio Shack I'm sure is over priced.

I think you have to use the proper branch with:

Here is what I used on Ubuntu:


There is a LOT of development going on with this version but I went back to cgminer until they get further along.

Mob, look for the windows binaries from the developer (nwoolls) in this thread: https://bitcointalk.org/index.php?topic=168174.3080

Nice case. If the data center complains about open rigs I may have to enclose mine in a similar fashion.


^ 5 GPU

^6 GPU

^200mm front fans with GPU fans speed at 80%:


More info: https://bitcointalk.org/index.php?topic=259828

Mob, I spent a few hours on this last night...can help you out but from my initial analysis dtbartle cgminer is better right now. What are you doing buying these? Their a rip off at $165

I'm willing to take delivery and send them anywhere in the world as long as you pay the shipping and $10/unit or 1 GS per 20 to compensate for the time.

It's good to see BCX still around and kicking....and living up to his namesake. Maybe it's me who hasn't been around as much (just now finding out about this) but I miss the days where he would wreak havoc on a regular basis

In the end it's beneficial IMO.

Just had a thought...wonder if KNC announced their hash rates to slow down Gridseed sales? Would be interesting to know if it had an affect on the sale of Gridseeds and GPUs. I know it stopped me from buying more.

I wouldn't say one is better than the other.

girnyau forked from dtbatle to add some additional freq and a per miner freq option (which is nice).

Since then dtbartle has taken out the hard coded freq and added stepping in increments of 25 and other stuff. Would be nice if he changed it to increments of 5.

Took a quick look at the code but it didn't look obvious to me how to do that.

If I could figure out stepping in increments of 5 I would fork dtbartle combining the per miner option of girnyau.

Anyone check to see what affect this mod does to SHA mining?

OMG dude...never thought to modify server power supplies for these.... I run a BUNCH of HP Server and that breakout board pmorici has that interfaces with the DPS-800GB-A looks good...also the Home Depot solution you posted for the  Delta DPS-835AB, Artesyn 7001138-Y000, IBM x3650 3655 835W (12.1V 69A) power supplies is brilliant!

....and these server power supplies have plenty of clearance for the case I just built! Too bad I already ordered 20mm extrusions for another case    Oh, well..give me an excuse to use the mider saw again

IBM power supply watts: 835w max.  80% of full load = 668w. 11 Gridseeds dual mining = 660w (60w x 11). 66 scrypt only mining = 660w (10w x 66).
IBM power supply amps: 69.0A max. 80% of full load = 55.2A. 11 Gridseeds dual mining = 55A (5A x 11). 66 scrypt only mining = 43.56A (0.66A x 66).

The HP at 1000w can push 800w (80%) for 13 dual mining or 80 scrypt!

And with that breakout board you could just plug in 12 stripped barrel plugs directly into it...man...so nice. It also connects to a Pi for remote on/off and monitoring. He said in a post that it cost him $30 to make though so it would be cheaper to do your $2.18 solution

Please post pictures of your setup with the gridseeds if you have time...if you can't tell im excited. Screw those $300 Corsair AX1200i's!

Yea, watching that "Jobs" movie on Netflix now. He was a real awful person. Great...but awful...kinda like Hitler.

Did not know all that about KNC. Although it does irk me they are free to do what they want with their coin (including dumping) but if they are selling used hardware as new....well, I believe that is illegal. At least it is here in the States.

Fibonacci does look to have some nice numbers but aren't they an unknown manufacture with no previous proven hardware?