I have the nvidia 8400GS (made by Foxconn) along with Foxconn 45 CM S MB and Intel P4. Pretty old setup but I was wondering if it would even be possible to overclock the 8400GS? It's not covered by warranty anymore so I'd like a little feedback, if possible, before I try. Then again, I am doubtful if any sort of overclock would help really. My motherboard doesn't let me overclock the processor to more than 3.16 GHz (stock is 3.0!)
Yeah, you can overclock it. But you said it well, don't expect any big improvements. The 8400GS is a really weak gaming GPU.
While your P4 is not a screamer by todays CPU standards, it is not much of a bottleneck for an 8400GS.
OC-ing 8400GS is simply pointless, because max overclock you can achieve is about 5-6% which means that your Graphic performance will increase with 3-4%, which means :
if a game runs on15 FPS on stock settings, OC-ed will be 16 FPS. You will NOT notice the difference at all.