SOLD to jarsumarsu

I have been following this thread for a while. Someone recently released a client, although it is very beta.

http://forum.xda-developers.com/showthread.php?p=22811604#post22811604

What advantage does this have over setting the power options? Ease of use?

Wow, I'm learning a lot from this. Thanks a ton guys.

I just setup a refund for the second PSU, Newegg waived the 15% restocking fee for me . Got a 910w single rail with Active PFC and SILVER certified ordered just now (7 year warranty!).

So it looks like a new PSU is the only way to go. Thanks guys, this forum is a true asset to Bitcoin's future success.

@DILLIGAF

Thanks, that looks like a great list of things to look for in a PSU, much better than the random selection I made last time.

@PatrickHarnett

What are you running the 3 cards at for clocks with a 1000w PSU?

@jake262144

Thanks for all the efficiency numbers.

CPU power savings isn't something I had looked at yet (or thought about) so I will be checking that out when I get the rig running again.

Whay kind of hash rates do you get on the 5970? Before this psu problem I was getting 410 per gpu.

I just did some tweaking and am now at 850w at the wall. I'm losing about 60mhash per gpu now though. Might be worth it to go to a bigger psu.

Hello all I will start with my system.

XION XON-1000P14F
GIGABYTE GA-990FXA-UD3
AMD Phenom II 925 (stock clock)
2x4gb G.Skill DDR3 1066 Ram
2x AMD 5970
1 2.5" Sata HDD
Open air case
Win7
Phoenix miner

GPU:
Voltage: 1.135
Shader: 920
Memory: 500

I am still using Afterburner, I tried CG miner but it was very unstable and about 10% slower than phoenix.

When I first built the system I was running a single 5970 with great results. I purchased another just a few days later and install it, after an hour it goes down, PSU wont power. I send the PSU back to Newegg. In the meantime I put the two cards into a video editing machine that gets little use, the PSU is a Rosewill 750w and put a Kill-A-Watt in line this time. At the wall this system drew ~950w, but was stable so I let it run while I waited for my Newegg return.

Today I got my replacement 1000w, got everything set up again, and turned it on (about 1005w at the wall). Everything was running great, I watched it for about 15 minutes and temps were stable so I left it to work its magic. Come back and it's powered down, tap the power switch to reboot it and see a large white arc in the PSU.

So I'm wondering whats the best thing to do from here. The eXtreme Power Supply Calculator says the system should only be using around 550w, where is all the extra power coming from? I cant imagine a PSU is only about 55% efficient, does OCing the GPUs add much extra wattage?. Maybe I need a name brand PSU?

Any help would be appreciated, I've only been doing this stuff for a few weeks.

Thanks for the help.