I bought the new card for my (admittedly terrible) system in the hopes of faster gameplay -- now it's creating more headaches than a hammer to the skull. Full-3D games run fine for five, ten minutes, then begin to lag for a few seconds, then run fine for say half a minute, lag again and so on. It only does this for Open GL (I don't want to use D3D because the performance really suffers -- it doesn't seem to bottleneck with this though). Any ideas?
no as you can see in my sig i use amds but i do use ac 97 onboard sound but im pretty sure my cpu is fast enough to recover from the lost cpu cycles but i dont know i noticed that nvidia chipsets use extremely more memory than my other via chipset it was insane. i didnt notice but it might have gone away when i found a sound card and put it in. then i think i killed it becuase i didnt have an fsb lock on my mobo and my sound just stopped working. thats when all my stuffs been kinda buggy.
Your video card is being severly limited by this system. Mainly the FSB. You're using some VERY slow memory with a processor that has a 400MHz FSB (Quad Pumped 100MHz). This severly limits the memory bandwidth available to the hungry Pentium 4 processor. To make matters worse you're only feeding it 512MB of ram, far too little for todays games (hell BF2 needs 1.5-2GB to run without issues).
I'm assuming your processor is a socket 423 design? Could even be socket 478 given the fact it uses the i845 (which came out in both socket flavours).
If it's a socket 478 processor, then I would suggest you purchase a used Asus P4G8x (Dual channel PC2100) and two sticks of 512MB PC3200 (they're pretty cheap nowadays).
This would at least feed your processor enough bandwidth while your onboard audio would be based on a Realtek ALC650 6-channel AC'97 solution, which is known to work well with games.
You know what, I figured out what was causing it to lag up (turned out it DID lag in Direct 3D). The reason was...
No processor fan. I opened it up, took off the cover over the processor, and there's a big blank space where a fan should be sitting. What you talked about made sense though, games don't run nearly as well as they should (ESPECIALLY in multiplayer -- even the original Counter-Strike is only running at 40/50 FPS). Good idea about the 478 processor, thanks for all the input. I'll get the Asus as soon as I can.