PEOPLE can anyone suggest me the best and fastest desktop PC I need it specially for gaming ?

If you wanted the best and fastest PC it would cost you about $10,000. If you have that money to throw around then you should start with the Intel Core 2 Extreme Processor. Get two GeForce 7950s and run them in SLI. Get 2 WD Raptors and run them in RAID. Make sure you have a wicked motherboard that can handle all that and a 600W or better PSU. Get at least 2GB or Corsair XMS RAM.

Seriously, I'm probably wasting my time telling you all this. Tell us your budget so we can give realistic advice on what to buy.

ANY PC can be the fastest and best, it really depends on what is INSIDE that counts. I'd suggest at least 200 gig of disk space and at least 2 gig of memory with a cor-2-duo.

Don't forget to look for eatra USB ports and other gaming ports!

I have a Voodoo Omen. It's super fast and liquid cooled. It's got 2 TB of disk space and dual processors. Cost me almost $16,000 US. Apple makes a system that takes up to 16 MB of RAM, but it's over $20,000 US.