I am mining using a Sapphire 5870 on a win7/x64 OS.http://www.sapphiretech.com/presentation/product/?psn=0001&pid=287
I have a core i3 2100 CPU.
My current MB is (was) Gigabyte P67A-UD3-B3 (http://www.gigabyte.com/products/product-page.aspx?pid=3765#ov
I use the computer for 24/7 mining plus as a home computer.
The problem is that this card heats up so much it freezes the system because it heats up the MB chipset.
I changed a few Chasis configurations, but when mining (even without OC @ 850Mhz) the system will freeze after 24-48 hours.
When I checked the MB temps I saw that it reaches the 50 deg. C, the gfx card itself can handle its own heat whether it is 65C or 85C.
The only solution I found was to open the side of the case and put a big house fan there 24/7.
But even in this configuration, which gives me ~43C on MB and ~65C on gfx card, after 2 weeks my MB died
Before this MB (P67A-UD3-B3) I had a Gigabyte H67-D2H-B3 which acted the same.
I don't want to invest in an MB that can handle 3-4 gfx cards as i have only one, can some one with a similar gfx card recommend anything they are using ?