Hello everyone,
I recently purchased an ATI X850 Pro AGP off of ebay, installed a Zalman VF700 on it and threw it in the case. Unfortunately this one could not be unlocked to 16 pipelines, so I just did some overclocking on it, and load temperatures were good. However when I loop 3DMark, it would eventually lock up. By this I mean the screen goes black (and on rare occasions it was filled with artifacst). I tried to following:
1) Lowering AGP speed from 8X to 4X. From what I've seen, this does not lower the performance any. My last card (9600XT) had major stability issues running at 8X, but was stable at 4X.
2) Lowering clock speed back down to the Stock 500/500 on the X850
3) Disabled ATI Hotkey Poller and ATI Smart services
4) Checked voltage in SpeedFan, 12V rail shows 11.04V, yikes! Knowing that software voltage readings are often grossly inaccurate, I took out my DMM and measured directly from a molex connector. 12V rail goes between 12.02 to 11.94V idle/load, and 5V rail is 5.12V/5.13V idle/load. Both are well within the +/-5% limit.
5) I checked the temperatures before and after overclocking to see if it's temperature related. Before idle/load is 38C/58C, after is 39C/60C. Which I believe is actually cooler than stock speeds w/ stock cooling.
It still does the same thing. The CPU is stable for sure (Primed over 24 hrs), I've been running it at this speed for over a year. No problem w/ RAM either, Memtest over 24 hrs stable, same with Prime95 blended test. I've installed the latest Omega drivers. There are two BIOS update available for my mobo, however one enables dual-core support, the other enables E6 stepping, so I did not install either. My PSU is an Enlight 420W which has served me well for the last few years. The rest of my rig is in my sig.
I am quickly running out of ideas. I would like to have it running stable when Oblivion comes out. Any help or suggestion would be greatly appreciated!
I recently purchased an ATI X850 Pro AGP off of ebay, installed a Zalman VF700 on it and threw it in the case. Unfortunately this one could not be unlocked to 16 pipelines, so I just did some overclocking on it, and load temperatures were good. However when I loop 3DMark, it would eventually lock up. By this I mean the screen goes black (and on rare occasions it was filled with artifacst). I tried to following:
1) Lowering AGP speed from 8X to 4X. From what I've seen, this does not lower the performance any. My last card (9600XT) had major stability issues running at 8X, but was stable at 4X.
2) Lowering clock speed back down to the Stock 500/500 on the X850
3) Disabled ATI Hotkey Poller and ATI Smart services
4) Checked voltage in SpeedFan, 12V rail shows 11.04V, yikes! Knowing that software voltage readings are often grossly inaccurate, I took out my DMM and measured directly from a molex connector. 12V rail goes between 12.02 to 11.94V idle/load, and 5V rail is 5.12V/5.13V idle/load. Both are well within the +/-5% limit.
5) I checked the temperatures before and after overclocking to see if it's temperature related. Before idle/load is 38C/58C, after is 39C/60C. Which I believe is actually cooler than stock speeds w/ stock cooling.
It still does the same thing. The CPU is stable for sure (Primed over 24 hrs), I've been running it at this speed for over a year. No problem w/ RAM either, Memtest over 24 hrs stable, same with Prime95 blended test. I've installed the latest Omega drivers. There are two BIOS update available for my mobo, however one enables dual-core support, the other enables E6 stepping, so I did not install either. My PSU is an Enlight 420W which has served me well for the last few years. The rest of my rig is in my sig.
I am quickly running out of ideas. I would like to have it running stable when Oblivion comes out. Any help or suggestion would be greatly appreciated!
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