Guys, My HD 6850 is crashing randomly..
forcing me into a restart!
The temps are perfect and running on 11.3(same thing in 11.2 also)
Was running for last one month..but having this problem since last 2 days.
It doesnt happen on load, crashes when im on desktop, or browsing.
I havent OC’ed at all.
Running on a Gigabyte superb 460, that should be a problem i think.
Its bugging me out!Is my GPU faulty? 
Please advice what to do.
TIA 
Try reinstalling the Driver for GPU and report back.
Either the PSU or the buggy Catalyst Driver, the 11.3 is notorious. I’ve not upped from the 11.1 till now and its perfectly fine, try to get a more powerful PSU from a friend and try to rig up your card to his system and check it out, if system stops crashing then its PSU otherwise… you know drivers.
Hope this helped, I still think its the drivers which are to blame and only 30% chance that it is the PSU but never hurts to check right.
uninstall driver, use driver cleaner to clean the left-overs and then install 11.1 and see
You have a pretty heavy system and IMO the PSU is unable to take the load of the whole system.
I missed the 9 fans that you have when you PMed! :ashamed:
Even considering that PSUlite says
Minimum PSU Wattage: 373 W
Recommended PSU Wattage: 423 W
PhenomII X4 955BE
Normal Mobo
2 DDR3 RAM STICKS
HD6850
1 HDD
1 DVD R/W
9 120mm LED fans
Capacitor Ageing : 15%
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I have reinstalled the catalyst a couple of times.
the 11.2 was stable for me since last 1 month, but when this problem occurred i upgraded to 11.3.
I dont think the PSU is a problem, because it doesnt crash even after 4 hours of crysis 2.. 
Right now, i have lowered the mem clock from 1000 to 900. a possible solution maybe!?(google)
If it crashes again, will do a clean install of 11.1
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Thanks sir!
The gigabyte superb 460 is a 400w PSU, with peak load capacity of 460w, you would be knowing that.
Should i change my PSU?
Still cant figure out why it works perfect of full load. and crashes while idling 
Gigabyte and ATi are famous for their crappy drivers .
^Thank you, your post was very useful.
If not on load but idle, that is weird. Most probably a driver issue. Any BSOD dumps.
^ thank you
Yeah i know its a 400w unit. If it works fine @ full load then the PSU should be fine, right? But for trouble shooting try to get a friend’s PSU and test the rig.
One more lose comment about the AMD drivers I’ll clap you in irons 
.
ATI power play is playing with you..
you can disable it in registry … are you using any programs like afterburner to monitor your card ?
If so thats your problem . Dont use them and see if you crash !.. look up power play problems on google tons of stuff
cheers and kind regards!
Bad / wierd 2D clocks? Use GPU-Z to check what the 2D clocks are and check for anything abnormal by using the log
I have my JAVA exam tomorrow
Will try what you said when i reach home.
Thanks DarkAngel, freaky and toolius sir.
Psu is definitely not prob. I am also using sapphire 6850, CM hyper tx3,athlon x4 b40 @ 3.7ghz, 4gb ddr2 800mhz ram, 4 led fans, seagate 1tb hdd+500gb seagate hdd, dvd writer etc… I haven’t experienced any crashes yet . Using this config from December 2010. Check for all driver updates for your system. Its not necessary that ati drivers are bad. They more stable these days than they were a few years ago
i am facing a similar problem. games are freezing and then stop responding.
running my card on vx450. it started after update to 11.3.
Can you downgrade to Catalyst 11.1 and then check again? Use Driver sweeper for proper uninstalling.
Im back to catalyst 11.1 and running on 900 mem clock..
the random freeze aint a problem now, but still my driver crashes and then comes back after 2 mins..