Can I overclock my video card (geforce4ti4600) and how would I go about it. I'm guessing I'll need a bigger fan?

You can overclock your ti4600 using coolbits. Here's how: http://oc3dmark.octeams.com/tip02.html You shouldn't need a bigger fan, unless you experience lock-ups and or artifacts, i.e. the card gets too hot due to overclocking. There are aftermarket heatsink kits available for the geforce 4. Something of this sort will work: http://www.newegg.com/app/ViewProductDesc.asp?description=35-116-006&catalog=129&manufactory=BROWSE&depa=0 FYI, you should be able to get an overclock of maybe 325 core, 650 memory, probably higher than that.

Thanks for the info, my fan from the vid card has just started making some very loud noises (sounds like a bearing to me) so I will pick up the Model:GF4 HP Cooler, under $10 much cheaper then I thought it would be. and thanks for the overclock info, i'm going to try it tonight.