So, I have an old PC with the following specs: Intel Pentium E2140 Allendale 1.6GHz Rosewill RCX-Z2 7 blades 80mm reverse ball bearing fan CPU Cooler ASRock 4CoreDual-VSTA LGA 775 Kingston ValueRAM 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 667 (PC2 5300) ATi x850xt APEVIA X-Dreamer ATXB3KLW-BK/420W Black Steel ATX Mid Tower Computer Case ATX 420W power supply for AMD/Intel Power Supply I recently added an OCZ Vertex 2 SSD to bring it back to life... now I'm thinking what else I could do to spruce it back up. Will I see a noticeable difference by putting in another core? Would a E7500 be worthwhile? How about a Q6600? Would these be bottlenecked by the memory? By the motherboard? Do I need to increase cooling/power for a Core 2 Quad? I'm thinking I only want to upgrade the CPU, and ram if necessary. It's basically going to be used as a light use computer, for web browsing, a lot of flash applications, and minecraft/ other lighter games. Would just dropping in a Q6600 alone be enough?