Jumping cables two gpus

[Heizu]

Hello Everyone once again i am seeking knowledge from all my senpais

 

But seriously aha

I currently have a rosewill Photon 750 PSU

With these PSU there are two 6+2 outputs per one cord

For the sake of cable management 

I was wondering if i could wire both of the 2 cords to one gpu and

then have the extensions of both cords power the second gpu

 

Thanks for any help!

[dragoon20005]

use one cord for one gpu

 

try not to share the cord between the GPUs

[Heizu]

use one cord for one gpu

 

try not to share the cord between the GPUs

Any reasoning behind this?

[dragoon20005]

Any reasoning behind this?

when those GPUs ramp up the current draw will overload the PSU

 

GPU will draw a lot of power by itself

 

and the cord will only support a certain amount of current

[jhaun]

when those GPUs ramp up the current draw will overload the PSU

GPU will draw a lot of power by itself

and the cord will only support a certain amount of current

Nonsense. That PSU has a single 12v rail so theyre all connected anyway. Why not use one cable then?

[Master Disaster]

Nonsense. That PSU has a single 12v rail so theyre all connected anyway. Why not use one cable then?

Because amps. Everyone thinks watts are all that matters but amperage is just as important, draw to many amps down a single cord and you'll do damage. If it was ok to wire both cards on one cord they wouldn't have included 2 cords would they.

[jhaun]

If it was ok to wire both cards on one cord they wouldn't have included 2 cords would they.

By that very same logic if it wasn't ok to use one cable then they wouldn't make one with that many plugs on it.

Without knowing the wire gauge and the wattage requirements of OPs gpus we cant say for sure, but they're probably not putting more than about 40a through it. Over about a foot of cable that really doesn't take a whole lot of wire.

[Master Disaster]

By that very same logic if it wasn't ok to use one cable then they wouldn't make one with that many plugs on it.

Without knowing the wire gauge and the wattage requirements of OPs gpus we cant say for sure, but they're probably not putting more than about 40a through it. Over about a foot of cable that really doesn't take a whole lot of wire.

Hang on, I misread the OP. Yeah your indeed correct, if you have one cable with both connectors on then using extension won't make any difference at all.

[Heizu]

Hang on, I misread the OP. Yeah your indeed correct, if you have one cable with both connectors on then using extension won't make any difference at all.

Hmm thats  what i originally thought that it shouldnt matter

as both cables should be made to supply enough amp for both extensions

[Mick Naughty]

If that's the case, why not just have one plug on every card ever made?

[Heizu]

If that's the case, why not just have one plug on every card ever made?

Same reason why most power cables has multiple lanes instead of a single. 

supplies more voltage altogether to a device

[Mick Naughty]

Same reason why most power cables has multiple lanes instead of a single. 

supplies more voltage altogether to a device

 

I assume you mean amperage then, as voltage shouldn't fluctuate that much and the wire should handle it regardless.

 

So having two plugs on the card would allow more voltage to the card as you say then why wouldn't you have to plug in two cables? Thus increasing the amperage supplied to the card over the limitation of a single cables max amperage.

kinda defies the point.

[Master Disaster]

If that's the case, why not just have one plug on every card ever made?

I was under the impression that each plug powered a different thing, 8 pin for the GPU and 6 pin for auxiliary and cooling.

[Mick Naughty]

I was under the impression that each plug powered a different thing, 8 pin for the GPU and 6 pin for auxiliary and cooling.

For most cards that is the case. Why have multiple sli cables if one could handle the amperage of the entire rail? I could just split into four and power both of my cards. If you have a cheap/weak psu that splits it PCI cables then I assume you have cheap/weak gpu's. So it's just another factor based on everything involved.