Got a few Sapphire 5850 Xtreme that have some weird problems that i don't know what's causing it.
The system would hang randomly, and sometimes even reboot.
The system hanging is random. it can hang while booting up, entering the windows screen, runs fine for hrs then hang, runs fine for days then hang, etc. No consistency.
I've tested numerous ways, including fresh install of Win7, tried diff driver versions, lowered the GPU clocks, run at default clocks, test the card on other system etc. BTW, I've got 3 of these cards, and they all behave the same way. Since they run fine when tested on their own on other systems, the GPU hardware must be good.
The motherboard is also good, b/c it runs fine with other GPU installed.
All hardware seems to be good, as the card runs fine on other systems.
This is NOT a power supply issue, as I used a known good 900W unit.
Here is a link to problem complaining about the same issues that I am having:http://www.tomshardware.com/forum/2852-63-5850-win7-driver-issues
I thought I would post here since a lot of people here use 5850 cards.
Any help would be greatly appreciated!