r9 280x and 780 watt 4 rail power

Toggle sidebar Toggle sidebar
Solution
Sakkura


It's not about spreading out the power to multiple graphics cards per se, it's about distributing the power connectors. So the CPU power connector (4-pin or 8-pin), 24-pin connector, and the 4 PCIe connectors can be spread out.

Having multiple 12V rails like that is theoretically safer than the more common design with fewer (often single) 12V rail(s) that can deliver more current. It used to be part of the ATX spec.

The 30A 5V rail is more of an issue, it indicates this is an older design from when the change from 3.3/5V-heavy PSUs to 12V-heavy PSUs was still pretty new...
Sort by date Sort by votes
D

danielthegreate

Prominent
Apr 4, 2017
113
0
760
That seems like a weird design, why put 4 rails of only 16A each in a 780W power supply... probably 3-way sli gtx 1050? dosn't make sense. And 30A on 5v? why?
That looks like a power supply designed by someone who is probably trolling, I bet the rails can't even put out the 16A they claim, there is a chance that the 280x overloads a single rail, however, if the card you are buying has 2 connectors you will be fine. If it is a single connector card you might need to buy a better power supply. Either way, I would upgrade the power supply first.
 
Upvote 0 Downvote
Sakkura

Sakkura

Illustrious
Aug 22, 2011
8,129
3
37,965


It's not about spreading out the power to multiple graphics cards per se, it's about distributing the power connectors. So the CPU power connector (4-pin or 8-pin), 24-pin connector, and the 4 PCIe connectors can be spread out.

Having multiple 12V rails like that is theoretically safer than the more common design with fewer (often single) 12V rail(s) that can deliver more current. It used to be part of the ATX spec.

The 30A 5V rail is more of an issue, it indicates this is an older design from when the change from 3.3/5V-heavy PSUs to 12V-heavy PSUs was still pretty new. But it doesn't look terrible, and Seventeam is a mostly decent PSU manufacturer.

I think the PSU is likely good enough for a 280X, but I'd want to check the rail distribution so you can spread the power draw of the 280X across multiple 12V rails. Normally it shouldn't be necessary, but the individual rails are a little wimpy here and it's an older design.
 
Upvote 0 Downvote
Solution
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom