- Joined
- Dec 22, 2010
Right now I have a 850w 80+ silver cert PSU. Would that be able to drive a 280x or if I upgrade the GPU do I need to upgrade my PSU too?
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PSU Req for 280x
- Thread starter Ironman129
- Start date
- Joined
- Dec 13, 2005
850w is more than enough to drive a single cpu/single gpu system, it could more than likely even do two in crossfire unless it's some shady brand.
OP
- Joined
- Dec 22, 2010
- Thread Starter
- #3
Thanks for the confirmation. I read in a review I think, that the card needs at least 750w for itself, but I think they might have meant a 750w PSU. just needed to double check! 
- Joined
- Jul 17, 2003
I just got two R9 280x's so I did some researching.
AMD recommends a 750W PS for one 280x. They want a 1000W for two in crossfire. From what others have written from the folding team is that a good quality 750W power supply works fine for two 280X's in crossfire as read from a kilo-watt at the wall.
Right now I have a 750W 80+ Silver running my 280x, core i7, 24 GB RAM, etc. and I don't have a bit of problem. Of course, the 750 is within spec.
My personal hunch is that the recommended wattage is for an average cheap power supply that puts out less than the stated/claimed wattage.
AMD recommends a 750W PS for one 280x. They want a 1000W for two in crossfire. From what others have written from the folding team is that a good quality 750W power supply works fine for two 280X's in crossfire as read from a kilo-watt at the wall.
Right now I have a 750W 80+ Silver running my 280x, core i7, 24 GB RAM, etc. and I don't have a bit of problem. Of course, the 750 is within spec.
My personal hunch is that the recommended wattage is for an average cheap power supply that puts out less than the stated/claimed wattage.
- Joined
- Jun 28, 2012
AMD is just covering their rear ends for people that decide to use piece of crap PSUs.
OP
- Joined
- Dec 22, 2010
- Thread Starter
- #8
Awesome, Thanks guys!
- Joined
- Jun 26, 2014
I think in this case I might have to rethink the PSU I have myself. Unfortunately (as some people here would say) I bought a Raidmax 630 watt. It's been doing fine so far, but they say Raidmax isn't known for their quality, so I'm going to have to probably invest in something new sometime these next few checks.
- Joined
- Jul 17, 2003
A good power supply (PS) really is a must. It's not sexy by any means. A good PS will protect your expensive gear by giving the machine clean power. A good PS will provide near or at the level advertised. Make sure to buy a good brand name that is actually certified. ~ $90 or less USD is typical for a 80+ Bronze. 80+ Silver/Gold/Platinum each cost more but provide more power per $ and less heat. E.G. a cheap 70% efficient PS will put .70$ in DC power and .30$ in heat. An 80+ Platinum will do ~.92$ in power and .08$ in heat. Less heat is a good thing too.
- Joined
- Jun 28, 2012
Here's a better idea.
Grab a unit recommended in our thread here or recommended by JonnyGuru and you're set.
- Joined
- Jul 17, 2003
+1 to that. ^^
I just connected my two 280X's to my 750 watt PC Power and Cooling 80+ Silver PSU and they are working great.
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