Unable to get this running reliably...now Bitcoin will not open without error.

This sounds interesting.

I'm wondering what an AM3 system with a Zotac 550 Fermi GPU could do in a month for starting out?
That's what I have presently and if it would do OK, maybe a pair/set of ATI GPU's in crossfire would work.

nVidia GPU does not work as well as ATI.

being an ATi/AMD fanboy has finally paid off. If only i still had a 5870

Got a boatload of them and can't seem to make it work...:argh:

I was thinking that might be the case.

Since my board can do a quadfire setup, I could get a full set of ATI's and turn it loose.
I do plan on getting another AM3/AM3+ board sooner or later and the old MSI setup can do the mining if I go for it.
I also plan on getting another CPU and if it unlocks too, I'd probrably let the 555 I have do it since I know it unlocks and clocks OK - Or maybe the 720 BE since it's a good one too.

I'll have to see how things shape up in the near future.

are you mixing generations?

When you mix 6XXX and 5XXX, it will not work.

If you try to run a card that is not connected to a monitor, that will not work either, you must either connect it to a monitor, or use a dummy plug.

Do you have the AMD Stream SDK installed?

Are the stars aligned properly?

All my cards are 5xxx (5850, 5870, 5970). On one rig the cards loop never finding the server, and on another rig Bitcoins refuses to start/install even after deleting completely.

are you going for solo or pooled mining?

Pooled - BitClockers