@ Puiu
with the exception of Far cry, you are looking at a 2% difference, that hardly makes the x8 interface "not very useful". unless the OP is going to build strictly for the purposes of benchmarking competition. and keep in mind that the benches you provided were all done in 2560 x 1600 resolution,max details, and max AA. also, if you look at most of the scaling studies done, the difference in FPS is more likely attributed to the chipset used.

hey ok i know that but jut for having an idea plz post the links og the pc stuff the monitor must be a 24" one, g11 and a good mouse. dont exceed the 1600 dollars plz man only if you can
Thxs to everyone

ive moved this topic to another one called: Help me build a very good gaming pc with 1600

Intel Core i5 750 ($200)
Gigabyte P55A-UD4P ($185)
Crucial Ballistix Tracer 2x2Gb DDR3-1600 (8-8-8-24) ($106)
Corsair TX650w PSU ($70 after rebate)
Sony Optiarc AD-7240S CD/DVD multi drive ($28)
Samsung Spinpoint F3 HD502HJ 500Gb ($55)
HIS HD5850 1Gb ($290)
Thermaltake V9 Gaming chassis ($75 after rebate)
Samsung 2494SW 24" TFT 2ms GTG ($210)
Microsoft Windows 7 Home Premium OEM x64 ($105)
Logitech G110 Gaming keyboard ($80)
Logitech MX518 8 button gaming mouse ($43)
Cyber Acoustics 2.1 68watt speakers ($39)
TRIPP LITE SUPER7 7 Feet 7 Outlets 2350 joules Surge Suppressor ($18)

Total : $1504 + shipping on selected items