6 card board for cheap!!!
Have one runs great ordered two more!!
uncanny copy/resemblance of ASrock H81 Pro BTC
same price!
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157724
True!
I read a lot about the h81 having issues these days
I have stopped doing 6 x GPU rigs, and standardized on 4 x GPUs and moving away from PCI-USB risers.
Since Phil's recommendation on Biostar Z170 Racing, I have my 5th rig based on the mobo - very pleased with outcome and minimal issues. Overall rig cost makeup is also lower due to lower watts PSU and M2 SSD. Even the power switch is done away with because of the on-board power/reset built in into mobo.
So, you have eliminated the expense of risers and power switches and gained the M.2(I love these). Are there heat issues with the gpu's so close together?
Would that offset the cost of the power of the motherboard power usage? Ex. I can get 6 or 7 gpu's for 1 motherboard. 1 motherboard is xx Watts spread over the revenue of 6 gpu's rather than 4 gpu's.
the 5 x rigs that I have based on the Biostar is so far the least problematic in my farm, and also the best performer for ZCASH. Temps so far is reduced significantly mining ZEC, vs ETH
All of Biostar farm using Nanos are maxed and steady at 58-62 sols using v3.1 ... compared to 6 rig setups (based on Nanos) at most 48-52sols, and stresses the poor 1840 CPU leading to hang and unstable after running for few hours.
I can also spread the power cabling/allocation better by not having too many power hungry 6xGPU rigs. My previous issues in power and trips was determined by my electrician -- too many 6xGPU rigs (1600watts PSU) clustered under one circuit (no thanks to 5x390s, 6x480s). My warehouse power has 3-Phase 63Amps, so spreading the 6xGPU rigs into 4xGPUs per rig evenly into 3 groups/phase will help ease the power distribution.
The issue of 4 GPUs so closely together, is actually not a problem and with Claymore's good fan controls, all of the Biostar rigs at 75-77c. A box fan behind the rack also helps. All I did was use the same technique by Phil using those GPU plastic stubs, in between the GPUs - 3 stubs per rig. I have used wooden chopsticks too and its all ok.
If you planning to have a couple of 6xGPU rigs - I think its ok, but if you have a farm.... 6xGPU rigs needs a bit more work, planning and expect power isssues. As for my case, I went for taking out all the items that will give me white hair like HDD/SSD (replaced by M2 and thumdrive EthOS), risers and big PSUs.
are you using intel i5 6400 or intel i5 6500 as your cpus? they will give you close to 18h at 3 threads 22 h at 4 threads
Very compact systems. Probably the most compact that I have seen! I am also seeing the benefits of mining ZEC - Higher initial profits, less power usage and less wear on the rigs.
Thank you (and Phil) for sharing your rigs and opinions! I really enjoy this forum.