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Topic: [Solved] First rig power problems (Read 106 times)

jr. member
Activity: 95
Merit: 2
December 22, 2017, 12:27:02 PM
#1
Edit: I'm a dope, yet again. I completely ignored the SATA -> VGA/PCIe adapters that come with the risers. Problem solved.



Just received the following components for my first rig:

  • biostar TB250-BTC+ (8xGPU)
  • 6x Asus ROG GTX 1070 (will be 8 in total in a few weeks)
  • 8x risers ver007
  • 2x EVGA 850w P2 80+ Platinum rated
  • mainboard power connector splitter to power on both PSUs at the same time
  • 4GB ram
  • other stuff, not important to the problem...

Being new to the scene, I misjudged:

  • the number of VGA/PCIe (6 and 6+2 pin) power cables these PSUs have (just 4) and support AND
  • the fact that both the GPU AND the risers need power

I totally assumed that if you powered the GPU directly, you didn't need to power the riser. Ok, my bad - I'm a dufus. I need 8 VGA/PCIe connectors so each PSU can power 4 risers and 4 GPUs. Each PSU only supports 4 cables, but 2 of the cables have both 8pin (6+2) and 6pin connectors (but too close together to reach both GPU and riser!).

How can I salvage this situation and get my rig up and running?

  • Power splitters? Unsure of safety here - can I power both a riser and a GPU from a single VGA power cable?
  • Obviously return the PSUs and get a higher/pricier model

BTW, been a long time lurker on BCT, this is my first post. BCT has been super helpful, thanks to everyone!

Cheers!
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