Hey guys, I'm looking for a recommendation on an itty bitty power issue I've run up against.
Here's the deal, I've got two systems, in each:
- 2 x XFX 1GB 6950 (~200W each, 885 / 760 gpu/mem clocks)
- Sempron 140 (45W), undervolted and clocked down to 800mhz
- 1GB DDR3-1333, undervolted and clocked down to 400mhz
- 1x Corsair HX750W 80+ PSU
At the socket, these guys each drew 435W max.
I picked up a few 5830's the last time they were in stock on newegg, and I'm adding 2 to each system.
I setup the first rig last night in it's new extender-equipped open air frame (yay!), everything working great, except I'm now drawing ~755W
at the socket.
I know my Corsair can handle it just fine for a while, but obviously there's efficiency loss, the PSU got pretty warm, and I worry about long-term stability. It seems I now need to supplement my power on these rigs to keep it all happy-good-times.
I figure I've got 3 options here:
1) Go big with an AX1200 in each rig... this is way
outside my short-term budget
2) Throw in whatever PSUs I've got lying around to power the new 5830's - this is OK short-term but I leave a lot of efficiency on the table
3) Pick up a reasonably priced, 80+ supplementary PSU
This is where I'm stuck at the moment - #3 is likely my best option, but I've got little experience with smaller 80+ PSUs, I've never really had much concern for efficiency until now. I'd love to pick up more of these Corsair HX750 PSUs but they're pretty pricey (~$145 USD each), and I don't think the load from just 2 5830's will keep another 750W at peak efficiencies.
So considering a budget of ~$150 total
, can anyone recommend a pair
of efficient PSUs, preferably somewhere in the 400-500W range?