ok i have decided to bought new pc with following configuration....
nforce 3 motherboard socket 939
AMD athlon 64 3000+
geforce 6600 256mb
1 gb ram
120 gb hdd
DVD-RW
now all is fine....but there is one problem about my case....the case is too much expensive which the salesman is recommending....with water cooler and power supply 450 watt.....i cant afford it...it is neccassery to buy this sort of case.....
there is another case with one fan at the rear and two on the side where the vga card lies...and another exhaust fan linking with the processor....is it ok and suits with my specification....thanks