many people have been rebooted from 3d games lately...... due to overclocking issues.....
From TweakXP.com...
"
I'm running an ATI Radeon 9700 Pro, and I've noticed that I would get reboots in almost every 3d applications. I would even get bluescreens 0x8E, etc. saying IRQ screwup. I have found that lowering the AGP Apature Size in your bios to its lowest setting helps a ton for stability. The AGP Apature Size basicly allocates system ram as video ram... System ram isn't as reliable as video ram. On my 128MB video card which has ram WAY faster than my DDR333, using the video cards ram not only speeds up your framerate, but also stabilizes your system. For not-so-great video cards you might notice a slight slowdown with this -- better slow than randomly rebooting."
The problem is caused by system instability due to overclocking:
1. Overclocking the graphic card's core speed too high without sufficient cooling will cause "...reboots in almost every 3d applications. I would even get bluescreens...."
2. The radeon 9700 series are sensitive to AGP Bus overclocking and thus are advised to lock it at 66mhz if the BIOS supports.
If the graphic card is not overclocked at all, then the aboved point 2 is likely:
a. Most motherboard's FSB and PCI/AGP Bus speed are LOCKED synchronously and thus overclocking the FSB also raises the AGP bus speed, resulting in point 2.
b. Reducing the AGP aperture size will results in paging the textures to the hard disk instead when the vcard's 128mb + AGP aperture are filled up. This is in fact SLOWER than "..using the video cards ram not only speeds up your framerate...." since the most recent games can eat up more than 128mb of texture memory.
c. If the writer thinks that 128mb of VRam is sufficient, then AGP Aperture will not be used. Therefore adjusting it will not matter AT ALL and thus;
d. Since reducing the use of system memory by lowering the AGP Aperture helped him/her, there can only be 2 reasons:
1. DDR frequency is overclocked too high due to FSB overclocking causing instabilty when the system is stressed (3d apps); or
2. The RAM is, or are getting defective.
Resolution:
Try resetting all Bus/clock speed (FSB/PCI/AGP/DDR/Vcard's CORE & MEM) to default i.e. absolutely 0 overclocking and see if the problem is solved.
If the problem still persist, check motherboard manufacturer for latest BIOS updates especially if AGP is 8x (very common problem).
or
The PSU is either not sufficient (if user has a lot of hardware devices in his/her computer) or low quality (fluctuating 12v, "dirty line". Which the 9700 is known to be very sensitive to that). Consider upgrading to a better or higher power PSU.
or
The 9700 is defective, RMA it. (Could be a Manufacturing QC problem but if there have been no graphic glitches or on-screen artifacts, then it is not likely this way).
OR
The motherboard (AGP bus) is defective/damaged.
hmmmmmm sorry if that doesn't help
~hue
