if i overclock my system at max still 430 wud b enough??????
If you overclock your E6400 to 3.2GHz then it will probably consume about 73w of power under full load if you extrapolate the data from the Xbitlabs.com CPU power consumption article in my previous post.
As I said above, an overclocked 7600GT will consume about 40w.
Toss in about 16w each hard drive/optical drive on the 12v rail. If you are using a very large capacity drive (400GB+) then up that to 20w. If I remember correctly a Western Digital Raptor 74GB consumes around 30w on the 12v rail.
Add another 6w for every 120mm fan in the PC. An 80mm fan uses about 3w. That's assuming they are running at full speed.
All other components do not draw power from the 12v rail.
Assume you are building the following:
Overclocked E6400 @ 3.2GHz.....................................73w
Overclocked 7600GT..................................................40w
2 320GB Hard Drives (16w x 2)...................................32w
2 DVD Drives (16w x 2)..............................................32w
2 120mm Fans (6w x 2)...............................................12w
Total Power Consumption on 12v Rail...........................189w
Total Amps on the 12v Rail..........................................15.75a
The above assumes every single component is being stressed to the max. That is very unlikely to happen. When playing a game your hard drives and DVD drives will not all be spinning at 100%
While playing a game I would guess your PC will be drawing about 165w on the 12v rail or 13.75 amps. Therefore, if the 430w PSU provides 18 or 19 amps on the 12v rail, then it is more than enough.