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Hi All,
I am mining using a Sapphire 5870 on a win7/x64 OS.

http://www.sapphiretech.com/presentation/product/?psn=0001&pid=287 (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 (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 ?

I just looked at the motherboard on Newegg for reviews and saw that it is one crappy motherboard (31% 1/5 reviews, that's pretty bad). From what I read there, I doubt it's the graphics card causing the problems. I doubt it's even heat issues, rather an unstable motherboard.

Does this sound like your situation?:

yeah... as i said - it aint the GPU its the MB i am sure !

The situation described is exactly what i experienced.

Now the MB is dead and I am looking for a new one.... any one out there with a sapphire 5870 and can recommend a good MB ?

go for an ASUS board. rock solid.

i've managed to avoid that by using a ITX board one of the amd e-350 setups there's nothing past the pci express lane to heat up.
this one has been able to handle a 5830 overclocked to 1025mhz for weeks on end
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157228

thanks, but i am kinda looking for intel MB. anyone else usign 5870 with intel cpu out there ?

iam using HD5850 + HD5770 on an S775 intel board with E6300, works fine

mastergamer: what is the board model ? (even though i am looking for a s1156 board, i would like to see if your board has the MB heatsink right under the GPU like most boards do)

Hey there,
in my rig, i have three XFX 5870s on a MSI P7N Diamond. Running fine for three weeks now. But I have to admit, it's inside an old bigtower case with a couple of fans in the side panel and a 120mm fan in the Front thats blowing out hot air. Board is 100% stable though.

In my work PC, I recently had problems with my mainboard too. My 5 year old Intel DG956WH became unstable and finally broke, i think the northbridge heated up to much by the single 5870 directly beneath it. Now I bought a cheap Asrock P5B-DE, because I just got my Q6600 Intel quadcore some weeks ago, and didnt wanna go all the way to buy new processor, DDR3 memory and so on.... As a precaution I although installed two 120mm fans in the case. Hope the board will last another 5 years now ;)

How is your case configured? I run a fan directly over my northbridge and would have at least 2 intakes and 2 exhaust fans for this kind of work. GPU's make for some nice space heaters.

I used to have a case with 2xIN 2xOUT (all were 80cm) - didn't work.
Now i have 1xIN 1xOUT (all 120cm) + open the side panel and put a big house fan at max speed blowing in air - doesn't work.
I think the MB is not designed to work at high temp (even though my mb is at ~42-44C).