Selecting the Processor is Cake-walk. But again Newbies will have trouble in choosing the proper CPU for their PC. Here's quick guide : SPEED OF PROCESSOR : You might've looked at specifications of certain processors. And first unit you look in specifications is X.XX GHz ,isn't it ? It determines the speed of the processors. So, it's simple logic- More the GHz, better & Faster the CPU. INTEL OR AMD : Both are two largest companies developing very nice processors. It depends upon you of which company you're fan of. I usually go for AMD processors ;cheaper & reliable .. Even though it gets hot pretty fast. But Intel is not a bad choice too, Intel's processors are sold much more than its opponent AMD. Again, it's matter of taste. ARCHITECTURE : Intel - Pentium, Dual Core, Core 2 Duo, Quad Core, Core i series. i Series are fastest among all in Intel architecture. AMD - Sempron, Athlon, Phenom, FX Processors. FX series are beast ranging 6 to 8 cores processor, lovely. 64Bit/32Bit PROCESSORS : 64Bit processors can process more data than 32 Bit. In 32Bit processors we cannot exceed 4GB RAM, while in 64Bit we can easilt extend RAM memory. CORES, WHAT IS THIS SHIT ? More the number of cores, more the processing capacity. Simple Shit While buying the Processor, First check the Speed of Processor & Then Number of Cores. Processor with 3.4 GHz & Four cores will work a lot faster than 4 GHz Processor with Single/Dual Core.