Hi,
I've searched high and low, found so many people with this problem on all sorts of different cards... but no fixes or good explanations in sight.
I've got open support tickets with XFX and OcUK. Oc have offered let me RMA the card for testing but i'm very interested in getting to the bottom of the problem before i spend a load of money on international shipping!
For the sake of testing - all components are running at stock speeds. I have 1 HDD and no optical drive to save power. No lights, extra fans or anything else that might cause a problem.
System:
ASRock P45TurboTwins2000 - Chipset P45/P43
Intel Pentium E5200 @ 2.5Ghz
4GB Corsair PC2-6400 DDR2 (2x2GB) @ 5-5-5-18
XFX ATI Radeon HD 4850 "XXX Edition" @ 650/1050
500GB Seagate HDD
Corsair H50-1
550W PSU
I'm pretty sure it's not a memory issue.
Memtest86 booted from usb stick
Windows HCI MemTest
I have a 550W PSU with 36A@+12V.
Tested a Force3D HD4850 which was fine.
Reviews on the retailer's website suggest it works well with GTX275.
Have also tested my 4850 card with a 650W 54A@+12V and issue is still there.
At this point i'm pretty sure it's not a power problem!
System also generally stable, Prime95 for 5hours+ (overnight) with no problems at stock speeds.
GFXCard runs Furmark stresstest for over an hour with no problems - max temps with 0xMSAA are around 58-60C and with 4XMSAA between 60-65C.
Adobe CS4 apps work perfectly, no crashes @ desktopping at all since i built the system.
Left4Dead 1+2 ran for several hours whilst i was playing/hosting 3 other people in Listen server mode. No crashes, no lag...
All other HL2 games i've tried work perfectly.
Assassins Creed 1 works perfectly
World of Warcraft works perfectly (unfortunately)
CoD4: Modern Warfare works perfectly
Prototype works perfectly but was total waste of money
Using the XFX 9.11 catalyst release and the AMD homepage 9.11 release, games like CoD: Modern Warfare 2, DiRT, Need for Speed: Shift, Borderlands and Mirror's Edge all suffer the same problem.
Somewhere between 1-5mins into any of these games the screen suddenly changes to a coloured (seemingly random) vertically striped void of disappointment which can only be rectified with a complete system restart.
Prior to the crash, the games all run "nicely" with 60fps+ and seemingly no lags. Crashes do not always coincide with high action - explosions and such.
Having tried 9.11 release, i downgraded to 9.10 catalyst + drivers.
The situation improved somewhat, Mirror's Edge stopped crashing but all of the other games had the same problems.
Yesterday i downloaded and tried the "leaked" 9.12 release and borderlands, mirror's edge and MW2 seemed to be working for a bit longer than usual but unfortunately still crashed out randomly!
I can get the card stable with all drivers if i underclock using RivaTuner to 599core/995mem but ideally i would like the option of overclocking in the future if i needed to, underclocking for basic function seems a bit counter intuitive.
I have clean installed different drivers, disabled Overdrive in ATI CCC, disabled ATI HDMI Audio and possibly a few otherthings i've since forgotten in order to resolve/locate the issue but to no avail. There is no BIOS upgrade/downgrade available from XFX and they're not being very helpful other than telling me to send it back.
At this point I'm just posting here hoping someone might have one last hail mary suggestion before i put the card in the box and send it back for testing.
I hope this wall of text is perhaps useful to anyone else suffering with the same problem.
As i hope are the replies
Thanks for reading!
First post btw.
/wave
Merry Christmas
I've searched high and low, found so many people with this problem on all sorts of different cards... but no fixes or good explanations in sight.
I've got open support tickets with XFX and OcUK. Oc have offered let me RMA the card for testing but i'm very interested in getting to the bottom of the problem before i spend a load of money on international shipping!
For the sake of testing - all components are running at stock speeds. I have 1 HDD and no optical drive to save power. No lights, extra fans or anything else that might cause a problem.
System:
ASRock P45TurboTwins2000 - Chipset P45/P43
Intel Pentium E5200 @ 2.5Ghz
4GB Corsair PC2-6400 DDR2 (2x2GB) @ 5-5-5-18
XFX ATI Radeon HD 4850 "XXX Edition" @ 650/1050
500GB Seagate HDD
Corsair H50-1
550W PSU
I'm pretty sure it's not a memory issue.
Memtest86 booted from usb stick
Windows HCI MemTest
I have a 550W PSU with 36A@+12V.
Tested a Force3D HD4850 which was fine.
Reviews on the retailer's website suggest it works well with GTX275.
Have also tested my 4850 card with a 650W 54A@+12V and issue is still there.
At this point i'm pretty sure it's not a power problem!
System also generally stable, Prime95 for 5hours+ (overnight) with no problems at stock speeds.
GFXCard runs Furmark stresstest for over an hour with no problems - max temps with 0xMSAA are around 58-60C and with 4XMSAA between 60-65C.
Adobe CS4 apps work perfectly, no crashes @ desktopping at all since i built the system.
Left4Dead 1+2 ran for several hours whilst i was playing/hosting 3 other people in Listen server mode. No crashes, no lag...
All other HL2 games i've tried work perfectly.
Assassins Creed 1 works perfectly
World of Warcraft works perfectly (unfortunately)
CoD4: Modern Warfare works perfectly
Prototype works perfectly but was total waste of money

Using the XFX 9.11 catalyst release and the AMD homepage 9.11 release, games like CoD: Modern Warfare 2, DiRT, Need for Speed: Shift, Borderlands and Mirror's Edge all suffer the same problem.
Somewhere between 1-5mins into any of these games the screen suddenly changes to a coloured (seemingly random) vertically striped void of disappointment which can only be rectified with a complete system restart.
Prior to the crash, the games all run "nicely" with 60fps+ and seemingly no lags. Crashes do not always coincide with high action - explosions and such.
Having tried 9.11 release, i downgraded to 9.10 catalyst + drivers.
The situation improved somewhat, Mirror's Edge stopped crashing but all of the other games had the same problems.
Yesterday i downloaded and tried the "leaked" 9.12 release and borderlands, mirror's edge and MW2 seemed to be working for a bit longer than usual but unfortunately still crashed out randomly!
I can get the card stable with all drivers if i underclock using RivaTuner to 599core/995mem but ideally i would like the option of overclocking in the future if i needed to, underclocking for basic function seems a bit counter intuitive.
I have clean installed different drivers, disabled Overdrive in ATI CCC, disabled ATI HDMI Audio and possibly a few otherthings i've since forgotten in order to resolve/locate the issue but to no avail. There is no BIOS upgrade/downgrade available from XFX and they're not being very helpful other than telling me to send it back.

At this point I'm just posting here hoping someone might have one last hail mary suggestion before i put the card in the box and send it back for testing.
I hope this wall of text is perhaps useful to anyone else suffering with the same problem.
As i hope are the replies

Thanks for reading!
First post btw.
/wave
Merry Christmas
