If you are building on a budget go with the E5200-it's less than half the price of the Q6600, and ought to clock as highly-very few games use the full 4 cores, so you won't lose out there, and would be far better off spending the money on a better graphics card. The PSU is a poor choice, never skimp on a PSU-it's like the heart of your system and if it goes wrong it may well take out the rest of it too! Join the Overclockers UK forums, by the way, they're really helpful :)

Here is what I would do with £400 (all prices from Overclockers)

E5200 (£64.61)

Corsair HX520 PSU (£70.49)

HIS ATI Radeon 4850 ( £123.36)

Abit IP43 mobo (£70.49)

Antec Three Hundred case (£39.94)

Samsung Spinpoint F1 500GB (£44.64)

= £413.53 (plus your RAM)

This computer is far better than your spec; better PSU, better HDD better GPU and a CPU that will perform very similarly to the quad in games at half the price. If you desperately want to knock a bit more money off, get the Antec Sonata 3 case with their 500W PSU for £89.21-it should still be OK, but the graphics card may be a bit of a squeeze, and it also has considerably worse cooling and a worse PSU. To be honest, it is well worth the £50 over your budget to get this PC-otherwise you have to start cutting back on your graphics card and PSU, which are 2 of your most important components.

EDIT: Could save £12 by going with the OCZ Stealth Stream 600W PSU, not a bad PSU for the price.

well i do have a password on it unfortunately (in order to log on to the account to view your desktop)N1nt3nd0gam3r

You have a password for your safe mode admin account? As in, the one which is called administrator? Sorry to sound condescending but Im just checking!!!

[QUOTE="citizen-zero"]That board is DDR2 only...mastershake575

That's not true. Nehalem will be DDR3 only, and is out at the end of the year.