ah cool thanks =D
my pc specs are:
Mainboard :   Gigabyte GA-MA785GM-US2H
Chipset :   Advanced Micro Devices (AMD)
Processor :   AMD Athlon II x 4 630 @ 2800 MHz
Physical Memory :   4048 MB (4 x 1024 DDR2-SDRAM )
Video Card :   Radeon X1650 Series  <-------- horrible xD
Hard Disk :   ST3160815AS (160 GB) (Sata one)
Hard Disk :   WD (1000 GB) (External power supply)
DVD-Rom Drive :   ATAPI DVD A  DH16A1P ATA Device
PSU: 550w Fatal1ty OCZ ( 1 year old )
playing on a 19" monitor @ 1440x900 but want to get a duel monitor sorted soon 

thanks alot for reading I put it into a psu calculator and it comes out alright but dosnt mention the soc versions etc :S