So, I got my 3rd mining rig up and running this weekend. Almost identical to my last build (W10, 6 MSI GPU, BTC Pro2 Mobo) except for a cheaper G3258 CPU (vs 4790k) & 8GB RAM (vs 16).
Initial boot Win7 install and W10 upgrade went well. Copied over all my mining stuff via USB stick from other rigs, including Crimson 16.10. Just started with 1 new MSI 470 from Amazon. Started up Claymore dual ETH & DCR (both at default intensity) and ran fine for about 15 minutes before I got a weird crash. But, seems like a fluke as after that, it ran for over 2 hours with 1 GPU just fine.
Now the strange thing... after 2 hours running 1 GPU, I shut down and install the 2nd (again, brand new from Amazon). But, when I turn it on, the system doesn't recognize the GPU... not Wattool, GPUz, or Device Manager... even after "scanning for new hardware". So, over the next few minutes, I swap out risers, USB cables, and try different PCIe x1 slots. Nothing works. The thing i noticed is that the MSI logo on the top of the GPU lit up, but the red lights at the other end never lit up on any of the attempts. This GPU is plugged into the same molex & PCIe PSU cables as GPU#1, so I don't think that's the issue.
Does this seem like a likely dead GPU to anyone? Or, is there something else I need to check to prove that out before returning it? Ultimately, I will find out as soon as the 4 used GPUs I bought from Phil arrive today, but would like to know if there is anything relatively easy to check that I haven't tried yet.
It's the risers, stupid! (props to those of you who are old enough to get that one lol)
Well, Phil saved me on this one even though he hasn't replied here lol! I got the 4 470's I bought from him and tried one as the 2nd GPU... no dice... still same issue as described above. So, steaming a bit, I proceed to change around all of the PSU cables and even re-installed the Crimson drivers... still nothing! To make matters worse, somewhere along the line, the 1st GPU that had been working fine 24 hours stopped, and I couldn't even get my rig to boot up!
Finally, as a last-ditch effort before pulling what little hair I have left out, I decide to try 1 of the 2 risers that Phil threw in as a nice bonus. First I try GPU#1 and bam! Lights up fine, rig boots fine. Install GPU#2 with Phil's 2nd riser and bam! Lights up and after boot, both GPUs recognized and now churning ETH + DCR just fine!
So, firstly... a BIG thank you to Phil as without those risers you included, I would have had a sleepless night tonight for sure!
Secondly, I am baffled at how ALL of these risers can be bad. I got 5 from Amazon seller XRP, whom I have ordered most of my previous risers from and all have worked fine. However, this new batch has a red PCIe slot, not black or blue like the previous ones, so they are clearly from a different batch and apparently, it's a horrible one. I have tried all or parts of 4 of the 5 and apparently they were what were causing all of my problems. I haven't opened the 5th one but what's the point because even if it worked initially, I would have zero confidence of its long-term capabilities, since the 1 worked for 24 hours then crapped out.
So... now I need to find a reliable supplier of USB powered risers so that I can get the remaining 4 GPUs up and running ASAP.
Can anyone make a recommendation here? Ideally, it would be a US-based seller that offers expedited shipping but I would be willing to sacrifice a few days for more reliability if necessary.
edit: actually just found these on Amazon from Sintech. They are a bit more expensive but have better reviews and actually look very similar to the ones Phil sent me. Anyone ordered from these guys?
https://smile.amazon.com/dp/B00HZ0M9F2/ref=psdc_464394_t1_B00IMYODGS