450w PSU handle a r9 280 ?

Toggle sidebar Toggle sidebar
Solution
sincreator


You don't need over 600w for that type of card UNLESS you plan to overclock it to the moon. CPU and GPU, lol. Most Single card systems with Intel CPUs and the fastest single gpu card will run just fine on a quality 550w unit. Take a look at this: http://www.guru3d.com/articles-pages/his-radeon-hd-7950-review,8.html Guru3d recommends 500w for a HD7950/R9 280. I say this because the r9 280 is just a rebranded HD7950 boost ed. anyway. Like I said before a 550w will be plenty, unless you plan to overclock your CPU+GPU. Then I would advise a 650w for the extra needed headroom.


PS: I am running a...
Sort by date Sort by votes
sincreator

sincreator

Splendid
May 27, 2009
2,479
0
22,110


You don't need over 600w for that type of card UNLESS you plan to overclock it to the moon. CPU and GPU, lol. Most Single card systems with Intel CPUs and the fastest single gpu card will run just fine on a quality 550w unit. Take a look at this: http://www.guru3d.com/articles-pages/his-radeon-hd-7950-review,8.html Guru3d recommends 500w for a HD7950/R9 280. I say this because the r9 280 is just a rebranded HD7950 boost ed. anyway. Like I said before a 550w will be plenty, unless you plan to overclock your CPU+GPU. Then I would advise a 650w for the extra needed headroom.


PS: I am running a 7970+7950 in crossfire with my CPU overclocked to 3.8ghz now and haven't had an issue yet, but I know I am close to the maximum that my power supply can handle. The only thing saving me is that in reviews they overloaded my PSU to 900w before they even had a shutdown. Even though it's rated for 750w, the max power listed is 880w on the PSU itself. Even so, I would like to get an 850w unit so I can put my CPU back to 4ghz-4.2ghz again.
 
Upvote 0 Downvote
Solution
R

Rookie_MIB

Distinguished
Jul 27, 2013
1,970
10
20,965
Only if you're running something like a 15w processor. :)

Seriously though, the whole point is that you don't want to run the PSU at 100% load for extended amounts of time. Looking at some other tests, and based on your exact system which might vary - using a minimum system test (ie: very few items installed) resulted in a power draw of 420 watts. If you have more drives, or an older (ie: higher power not taking advantage of current CPU efficiencies) processor you would be uncomfortably close to the max system draw.

With almost zero headroom, I would say upgrade the PSU to a minimum 600w. If the PSU fails, it could take out more than just itself since it's connected to everything in the computer and I'd hate to see the shiny new parts go up in smoke.
 
Upvote 0 Downvote
InvalidError

InvalidError

Titan
Moderator
May 18, 2007
23,815
5,265
108,890

The 780 uses ~300W peak and the rest of a typical i5/i7 build uses ~100W, which leaves ~50W to spare.

If you look at 780 and R9-290X reviews, the whole system power draw measured at the wall only goes to 350-400W and that includes the PSU's losses which are not part of the PSU's output ratings.
 
Upvote 1 Downvote
InvalidError

InvalidError

Titan
Moderator
May 18, 2007
23,815
5,265
108,890

Except those are at-the-wall measurements and the AX1200 is ~90% efficient at 400W so that 390W at-the-wall translates into ~350W on the PSU's outputs... and the DCU2 is factory-overclocked with boosted stock thermal limits, which lets it use nearly as much power as a stock no-frills R9-290X.
 
Upvote 0 Downvote
4745454b

4745454b

Titan
Moderator
Apr 29, 2006
29,241
437
93,590
For the record I am running a 280/7950 off a Rosewill Capstone 450W. No problems. I don't know that PSU, but it probably can. I saw it has a 35A 12V rail, while mine has a 37A. But it says it can run a 7970, so a 7950 is doable. Assuming they weren't lying about the output.

225W 7950 + 125W AMD FX CPU + 50W for rest of system and you have total draw of 400W. So yes, AMD CPU is probably a bad idea. I have mine paired with a 3570K at stock settings and draw around 325W from what I've read online. As I said, no problems.

Edited for spelling.
 
Upvote 0 Downvote
R

Rookie_MIB

Distinguished
Jul 27, 2013
1,970
10
20,965
Well, I guess we should just all hold off until we ACTUALLY KNOW WHAT HIS BUILD IS.

So, for the OP, post your build completely. No more of this 'will this PSU support this video card' crap because honestly, it doesn't just support the video card, it has to support the ENTIRE SYSTEM PLUS THE VIDEO CARD. <pulls hair in frustration>
 
Upvote 0 Downvote
InvalidError

InvalidError

Titan
Moderator
May 18, 2007
23,815
5,265
108,890

Whatever his build is does not really matter that much: when in doubt, go with a typical worst-case...
- GPU: ~300W
- rest of system: ~100W for typical Intel-based enthusiast builds, ~150W for AMD-based builds

So unless OP has some outlandish hardware in there, we are talking 400-450W peak total; likely far less during normal (non-FurMark+Prime95) use.
 
Upvote 0 Downvote
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom