Hi all... I've been trying to build my Gaming+Mining rig for the past 4 weeks, ordering parts from China, Amazon, and hunting for various parts around my city, and at last all my parts have arrived... and I've been stuck in getting all my GPUs detected for 8 hours straight! My fingers and thumbs are blistered from replugging all those molex and 6-pin cables
First of all, here's a pic of my rig:
I ordered this server rack all the way from China, since it would make my rig animal-proof once I drill a bunch of holes and install a powerful fan by the side. Neat for those with animals.
And here's a picture of my motherboard PCIE slots in bios. I'm using this one: https://asus.com/Motherboards/ROG-STRIX-X99-GAMING
So if we can call my PCIE slots as A - B - C - D - E - F, with A being the one nearest to the CPU, that'd be great.
Now my problem is, I've tried a million different combinations and I can't get more than 3 GPUs detected. I can stick a single GPU onto F and A slot (without riser) and it would work, but if I stick the same GPU onto F slot with a riser, it wouldn't work (monitor doesn't boot up) but it works on A slot. It can't be a faulty riser because it works on A, but not on F (solo testing).
B slot (1x pcie) doesn't work single/combo, it just seems dead! Faulty mobo? And D slot (without riser) boots me into Windows in basic graphics mode, and when I looked into Device Manager, it shows my card as VGA Controller (not even Basic Microsoft card). This same D slot also never gets detected with riser.
E slot (1x pcie) works if I have a GPU on F (no riser), but E slot fails if I have no GPU on F slot without riser (this is crazy and confusing).
A + C + F works, (F without riser)
A + C + F does NOT work (all using risers)
I mean, I could go on, but the point is, I don't understand what's going on! I've tried everything I searched on these forums, including:
- uninstalling 16.7.2 crimson drivers in Safe Mode using DDU, then plugging in a single GPU onto A slot, installing the driver, reboot, then replacing A slot with a GPU using riser (works), rebooted, plugged in a second GPU onto F slot (fails, F slot doesn't get detected, tried with a confirmed working riser to make sure it isn't faulty).
- On Windows 10, tried flashing my BIOS to the latest one (ASUS-0801, as a last resort)
- Tried setting all my PCIE slots to Gen 1 mode in Bios, excluding the slot where I don't use riser, then changing it back when I test with riser
- Installed the 6 GPU mod for Windows
I'm at my wit's end, and I've been obsessed in getting this to work. 8 hours straight without dinner and it's 3 AM already! Right now, I'm mining using C, E, F (F without riser), while the other 3 cards are sitting on the side.
I suspect my motherboard is the issue here, but I'm just no expert when it comes to hardware - so if anyone knows what's going on, please save the rest of my hair.