• Competitor rules

    Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.

Power settings for SLI 780Ti

BDEE

BDEE

BDEE

Soldato
Joined
21 Apr 2011
Posts
3,236
I have a pair of EVGA 780Ti ACX Superclocked cards in SLi running on a AX860i PSU.

The PSU is single rail and have read that it's a good idea for anything more than 500w-600w to be multi rail - This one has the option of enabling multi-rail mode on individual PCI-E outputs.

My two questions are -

1.Do I need to and will it really make any difference?
2. What level should I then set it to? The utility has a slider which starts at 20 (I assume this is AMPS) and up to max of 40.

Cheers
 
Ok, it won't change into a multi rail PSU, that's bad use of terms/marketing BS. There are very few real multi real multi rail PSUs and there's not much reason to need one unless you are silly enough to overload a cable.

I would assume it is setting a overload cut out level or power limit on different lines. You don't need it, but if you worried about you GPUs overloading I guess you could use it.

Divide the maximum power usage (watts) you GPUs should use (assuming you are using 1 PCI-E output per card which would be the best option) by 12 (12 v) and that will be the limit. I'd add a bit more 3-4 A to cover for minor spikes, you don't want it randomly under powering the cards or cutting out in normal usage.

Old PSUs which had these line limits(so called multi rails), caused people issues when they upgraded to high power usage cards back in the day. Because they need more then the fixed output per line, people had to more inventive in their cabling. :)

I personally wouldn't bother, but it's up to you . :)
 
You must log in or register to reply here.
Back
Top Bottom