Does cooling the chipset (socket 7, mvp3 chipset) and cache on a motherboard improve performance, or remove heat at all?

Also, I ran across a website (2cooltek) and saw how this guy put lot's of heatsinks on the RAM on his TNT2 card, which supposedly made it possible to overclock the memory speed more. (this site is also where I saw someone put a heatsink and fan combo on the chipset)

Does cooling the ram on the video card improve performance, and/or allow more extreme overclocking?