650W should be no problem. Even a small overvolt is a possibility but you will find that efficiency of the PSU will further amplify the diminshing returns of overvolting. If you are running the cards at stock voltage then I'd say 650W is ideal.
Do be careful with overvolting though. My dual 5850 system is currently drawing 304W from the wall for 724.3 MH/s from a 0.1V undervolt. A 0.1V overvolt is going to send the power consumption far in the other direction and more might push the system over 650W. I would not overvolt without a power meter so that I can be sure that the PSU is not being overworked.
Topic: 5850 and power supply. - page 2. (Read 2807 times)
Be careful with overclocking but you should be fine otherwise.
Should be fine. I had a 5850 running on a cheap-ish 400w, along with an X4, and it ran fine unless I tried overclocking. A quality 400w would have done fine though. An additional 5850 will only draw 150w more, so even a quality 550w would be fine.
Hey guys, I'm working on a mining rig and I have a question.
I bought a 650W XFX power supply (80 plus bronze), and I want to run
two 5850's on it.
The rest of the rig: Phenom II x4, 2 HD's, 4 GB's RAM.
Any tips are appreciated, thanks.
I bought a 650W XFX power supply (80 plus bronze), and I want to run
two 5850's on it.
The rest of the rig: Phenom II x4, 2 HD's, 4 GB's RAM.
Any tips are appreciated, thanks.
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