Windows 7: Sapphire HD 5770 crashing

Hello
Recently, while playing graphically intense games, my system has been crashing with no BSOD. (simply, just turning off) My first reaction was heat, so I began to watch my temps. They never reached my emergency turn off levels set in the BIOS. I then figured my PSU was not strong enough to handle 100% load, so I upgraded to a 600W PSU. (rated far higher then what my system pulls) The error still persists... so, I updated my M/B BIOS, update my VBIOS, ran memtest (with 0 errors over 4 hours), ran prime95 (4 hours with no system crash), ran furmark3D (for 30 minutes, no crash) It usually crashes within 10 minutes of playing, for example, Need for Speed ProStreet. Keep in mind, this game is rather old and a lot less demanding then other games. It will also crash playing Medal of Honor for about 10 minutes or so. Playing World of Warcraft, it usually won't crash. (though it happens rarely) Scouring the system event logs proves fruitless. With no BSOD, at that, I assumed it would have to be a hardware issue. (yes, I have it set to show BSOD instead of restarting immediately)
What should I do? :x

Windows 7 Home Prem. 64
AMD Athlon x2 7750 Black Edition
Sapphire HD 5770
Biostar 8100 m2+ se
2GB DDR2 (same sticks)
Corsair CX600

Update the Radeon drivers
ATI Radeon

Use driver sweeper to remove the older ATI display driver versions
http://www.guru3d.com/category/driversweeper/

Thanks for the quick reply, that one (with the CCC v2) is the only one I haven't tried yet. Might as well. Will post back shortly with the results.

It still crashed

You can try that...
ATI driver install assistance
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(Sometimes this happens from high CPU temperature)
Are you sure ur CPU temp is the right one?Because a friend of mine had the same issue and at the end was a high CPU temperature problem.
Test ur CPU temps with this Core Temp
Download the 64Bit version.
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If you want to control ur graphic card temp in ati ccc enable the Ati Overdrive,DONT touch anything else just enable the fan control and set it accordingly ur needs.
panais

Absolutely positive it is not heat related. My thermals are a good 10 degrees under what my computer should be emergency shutting down at when it occurs.

What are ur CPU temps in idle?
Restart and enter bios setup.

The best drivers as of now are the 10.10 all other versions after suck .

I tryed all drivers from here on after and all of them are unstable.

I have had the same issue random bsods games just disappearing ,even some games the bosses were invisable but everyone else in co -op can see him .

I hope they get this resolved it is alot of money being pumped into these things and they still can't get it right ,,,,,,,,,,,,,,most likley you will have to revert to a old driver even 10.9 works on the hd5770 after all i still own one so try the 10.9 or 10.10 you won't crash anymore


GoodLuck !

Solarstarshines
I use 10.11 and 10.12 and i n never had any issues with my 4890.
It must be a 5770 compatibility issue then?

I owned the XFX HD5770 and sold it after a month.

With mine i lowered the ram speed and increased the clock speed to 1000 and 1000 as at stock ram speeds it would crash all the time. It might be worth trying lowering your ram speed and see if the crashes still happen.