In support of what branjo said, I have a 7750 in my FM1 A8 Llano board since the on chip GPU together with the board's bios caused me no end of difficulties.

Anyway, I'm running 5 threads with an app_info.xml file under BOINC 7.0.31 and the work units seem to run in about 6.5 minutes each. So that's a batch of 5 wu's 9 times per hour or a little over 1k wu's per day. Please correct me if my math is wrong. I do get a little mixed up sometimes but I think that's right.

Also, I don't think I've overclocked that card yet and my experience so far with the high end 7950 and 7870 cards is that they are very easily overclockable using the catalyst control panel.

I don't think there is quite as much headroom on the 7750 but there IS some.

Sweet. Most I have run on my 2P rig is 12 on my 7950. Didn't think it would do much better going higher. Let us know how it works out. Curious to know if they all sync or spread out crunching.

Thanks Hypernova. So far things are ok but I do run into a weird problem when rebooting. The tasks don't seem to kick off smoothly. they will sit and idle indefinitely if I let them. It seems that I have to kill BOINC manager. Wait a minute or so and then start it up again in order for things to work properly. It's very strange. I don't have this problem with any other machine.

Nanoprobe: It does seem that they they are all out of sync and that I'm getting a wu up loading several times per minute. It's sort of fun to sit there with BOINCtasks up and watch it (I'm easily amused as you can tell).

I got mine off of ebay as engineering samples - Ax stepping at that - QA92's.

I paid around $700 or maybe 750 each I think. But I was limited to just 2 m/b's if I wanted to run them in 2P mode - the X9DAi from Super micro and there was one ASUS board I think.

So if you work with a reputable dealer, you can do it on *cough*cheap*cough*. My guy was in China and stood behind the transaction - and believe me, we went back and forth a few times because first there was a mixup (I was supposed to get 2 QAMT chip not the QA92's and had paid extra for those). Then the DAi board was incorrectly reporting the temp of the chips and the cpu fans were spinning up like crazy which was freaking me out to no end. Etc.

But in the end, it all worked out. I even ended up putting up some more cash and buying 2 Xeon quads rather taking the refund I was owed. The vendor was really patient, answered all my stupid questions and although he might take a few days to get back to me, he always did.

I got my xeons from ebay too from a company called IT creations. Not ES but used. A few hundred bucks off from what the egg would charge. I did look on ebay to see if anyone was selling the 8 cores. Still pretty high. Need to win the lottery to build a 4P board with those 8 core chips.