Serious random jumps in D3D graphics

[khyar]

Okay someone, solve this and I'll love you forever!! I've just built a new PC, and of-course, the first thing to do is to benchmark it against others. While running 3DBench 2001, the game tests and theoretical (D3D and DX8) test had a similar problem, during otherwise very smooth frames, a sudden jerk or jump, as thought it got stuck, would happen. This jump does not occur at regular time intervals. I entered Unreal Tournament, and, the same thing happens here. Okay, here are my system specs:

ASUS A7V333 with AMD XP 2100+ @55degC, 512Mb CAS2.5 DDR (1x), 80Gb ATA133 Maxtor HDD, AGP 4x ATI Radeon 8500 128MB. I have BIOS rev 1011 for the mobo, the latest VIA 4in1 drivers, and the latest ATI drivers, under WinXP Pro. Also fitted are Hauppage TV tuner, SMC 10/100 Network card

The problem seems to occur regardless of refresh sync being on or off, but is more noticeable when on. Now my questions are: what is causing this? How do I go about identifying the cause?

It could be WinXP, ATI drivers, VIA AGP drivers, ASUS BIOS, or an improper BIOS config, although I have set it to all AUTO for now. There are several features in the BIOS such as AGP aperture, memory cache mode (UC or USCW), DRAM burst, drive strengths etc. Could it be one of those? Or do I have a faulty component somewhere. Could the TV card be interfering with DATA transfer along the bus? I just have no clue!

Thanks in advance for any help!! Much appreciated!!

Regards,

Paul

 

[WW]

some troubleshooting ideas:

take out the tv card and network card (one at a time) and see if that corrects it

could be a irq conflict...everything ok in the device manager? turn off as many devices as possible in the bios and see if that fixes it. serial ports, lpts, usb, etc.