Theoretical: repurposing PCI-E for EPS or doubling EPS 8-pin on a single-rail PSU

LePhuronn

LePhuronn

LePhuronn

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Hi there.

This is a purely theoretical question to satisfy a curiosity I have for a pie-in-the sky modding project. The situation is this: I'd be looking to use the Maximus XI Gene motherboard which has 2 8-pin EPS connectors, and a RTX 2080 with its 8+6 pin PCI-E. Due to reworking some of the case internals, I'd be looking at either the Silverstone SX700-LPT or SX800-LTI SFX-L PSUs. Both of these are single-rail design, have a pair 8+6 PCI-E connectors for 2 GPUs, but only 1 8-pin EPS.

Since single-rail PSUs have their protective circuitry monitoring the total load on the PSU, in theory does it matter what 12V power is being delivered to where? Everything drawing 12V is monitored as a single thing, so if the PSU can drive 2 GPUs and a single EPS, would it be a lesser load to drive 1 GPU and 2 EPS?

So...

Question 1: could I rewire an 8-pin PCI-E into an 8-pin EPS? I'd need two double wires to populate the additional 12V and ground wires.

Question 2: could I double up all 8 wires out of the EPS into 2 connectors?


Hit me up with your thoughts, cheers.
 
But where's the fun in using somebody else's stuff? :D plus it'd have to be sleeved and whatnot. Still, its very existence confirms the viability of question 1.

Thanks Armageus.
 
I don't have any kit yet. This project will probably never happen, but I'm making plans and working out what I can and cannot do. Given what I'll be doing to the case, there won't be any room for a full ATX PSU. Also, if anything ever happens I may not use the Gene anyway. But like I said I'm in the planning stages for a what-if and working things out based on my "like to have".
 
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