Merry Christmas everyone. Just wanted to take a moment to thank all of you on this thread who have been very kind, patient and helpful educating a mining newbie like me over the past 2 months. I am still not where I want to be but have learned a lot and hope to continue that and leverage it into a profitable 2017.
Here's a quick update on my never-ending battle to get 6 GPU's running on my 2nd rig... yesterday, I took another shot at strap-modding the bios of my MSI 470s. My first attempt about a week ago to mod GPU #0 didn't work for some reason and I had to flash it back to original settings. This time, I unplugged my orphan Nitro, rebooted, and flashed dev #1 with the modded bios. Reboot went fine but upon checking DevMgr, found the dreaded error 43 on presumably the card i flashed. Tried running the 6xGPU mod a few times but no dice, so I re-flashed it with original bios, rebooted, plugged the Nitro back in I'm back to "normal".
What i don't get is why the exact strap-mod I used on the exact same GPUs on my other rig (same W7) doesnt wanna work on this rig... 0 for 2 now. I'm sure I am doing it right but this rig doesn't wanna take it. The only real difference is the Mobo between the 2 systems. Anyway, I'm at the point where it probably makes sense to strip this thing down, run the driver cleaner, then re-install the GPUs one by one, maybe flashing each as I go.
But, then I got to thinking... if I'm going to basically re-build this thing, I might as well install Windows 10, since I have heard from numerous people that this is a better OS for anything over 4 GPUs. And, it looks like I can still get an upgrade for free so probably worth the shot. This time I am going to try plugging the 1st GPU (and monitor) into slot #2 (x16) since starting with slot #1 last time may have been causing some of my issues. Hopefully, W10 will let me get 6 GPUs running and modded. That should get me about 40% more hash-rate on XMR vs what that rig is currently doing.
So, I got my 6th 470 for rig #2 so will probably take a crack at moving to W10 and rebuilding this thing today. This is my plan but I wanted to ask for opinions as to whether or not this is over-kill. Note that current status is W7, max of 5 GPUs, 2 unsuccessful attempts to strap-mod bios on 2 separate GPUs (exact ones that I have done 4x on my other rig).
1- Power down and unplug all but 1 GPU. Sole GPU will be plugged into PCIe slot #2 (x16), monitor plugged into GPU via HDMI cable.
1a- I suspect this might not work given the issues i have had with slot #2, so will plug into slot #1 initially if needed, then try slot #2 as primary again after W10 install.
2- Boot up and upgrade to Windows 10 before doing anything else
3- Load Crimson drivers from AMD site for 1 plugged in GPU
4- Test GPU in Claymore miner, probably ETH since it shows individual GPU speed, unlike XMR miner
5- Flash that GPU with bios strap-mod, overclock & under-volt, then re-test in ETH miner to ensure speed increase
6- After ensuring all is working correctly, power down, unplug GPU from slot #2 and plug in another GPU into that slot
7- Repeat all of the steps above except for #3 since the drivers will already be on the machine
8- After all steps done for all 6 GPUs, start adding GPUs 1 at a time until up to 6 (hopefully)
9- If I get the error 43 code at GPU #5, install the 6xGPU registry mod app
This is obviously going to take the better part of a full day. The thing that could save significant time would be to skip the 1 at a time method and add GPUs incrementally after getting the first 1 to work. This would make bios flashing a bit tougher, but I am under the impression that windows should add GPU's device numbers in order, so maybe this could save some time. Meaning, get GPU#1 working after flashing bios mod on device #0, then add the 2nd GPU and flash device #1, etc, etc.
At this point, I am no planning to mess with the bios on the orphan Nitro. If I can get 6GPUs and the 5 MSI's bios modded on this rig, I will be very happy.
Anyone see anything wrong with this approach or have any suggestions?