At this point, I would recommend saving your money and investing in a new modern CPU and motherboard. LGA 775 is a dead end at this point, and as you discovered, the quad core CPUs for that platform are selling for ridiculously inflated prices. The E8400 is not going to be much faster than what you have now. You get an extra 200MHz clockspeed, and more L3 cache, the extra cache won't really help you with games, and a 200MHz boost is nothing to really write home about. To get a really worthwhile upgrade for your CPU, you really should be looking at an i3 at minimum, or a high clocked Core 2 Quad at the very least.