Corsair RM750 + E-ATX MOBO?

unp|dissy · 8 May 2015 at 10:19

Hi everyone,

I currently have a Corsair RM750 PSU and was looking into moving to an X99 rig with an E-ATX motherboard.

I know E-ATX boards need an extra cable from the PSU, but this Corsair one only comes with 1 x 4+4 pin CPU cable.

So, could I use an 6+2 pin PCI-E cable as they plug into the same sockets on the PSU? Or do I need to invest in a new PSU that comes with 2 x 4+4 pin cables?

stulid · 8 May 2015 at 10:26

What board?

unp|dissy · 8 May 2015 at 10:30

stulid said:
What board?

Someone is selling this one in the MM :-

http://uk.msi.com/product/mb/X99S-GAMING-9-AC.html#hero-overview

spoffle · 8 May 2015 at 10:32

EATX boards don't *need* the extra cable, it's just there as an option should you be using it in a way that requires more power than one cable can supply.

unp|dissy · 8 May 2015 at 10:57

spoffle said:
EATX boards don't *need* the extra cable, it's just there as an option should you be using it in a way that requires more power than one cable can supply.

Ah right OK, I didn't realise it was an option.

So if I'm going with a 5820k and not going SLI, would you say I wouldn't need the extra power?

stulid · 8 May 2015 at 11:00

Thats right what he said, many boards just work spot on with a single 8pin ATX connected, maybe dual CPU boards do need two of them (one per CPU), but I have run a few single cpu boards with just the main 24pin+8pin and left additional 4pin/8pin ATX empty and never been held back.

P.S the pins of the PCi-E maybe the same at the PSU end, but at the end that plugs into a gfx card they will be a different shape than a 8pin ATX to stop you making a costly mistake.

unp|dissy · 8 May 2015 at 11:05

stulid said:
Thats right what he said, many boards just work spot on with a single 8pin ATX connected, maybe dual CPU boards do need two of them (one per CPU), but I have run a few single cpu boards with just the main 24pin+8pin and left additional 4pin/8pin ATX empty and never been held back.

P.S the pins of the PCi-E maybe the same at the PSU end, but at the end that plugs into a gfx card they will be a different shape than a 8pin ATX to stop you making a costly mistake.

Ah right OK, good stuff. Saves me an extra upgrade for now

Time for the money planning stage

Cheers for your help fellas