Spec Help Please With Partial Upgrade

[Khrest]

Haven't upgraded my rig for a long time now, other than a new Stacker late last year, and I really need help with specs.

Currently I have:

Coolermaster Stacker
Zalman Reserator (CPU & GPU)
Abit IC7 MB
Northwood P4 3.2c
2gb Corsair PC3200 XMS
Gainward Goes Like Hell 6800GT @ 405x1185
Audigy 2 ZS
Inadequate PSU which is too noisy!

I want to keep the Stacker and perhaps the Zalman if it's compatible. Silence is the key here guys. I am willing to turn to the darkside and use AMD kit, no preference for Intel other than history. I'd like a new 400-odd gb drive for system use, have a 250 that I would switch to backups and files.

Usage is 50-50 between games and internet stuff. I'm not planning on overclocking but need my games to run a bit better. Oblivion has really shown me up this weekend....

Budget is around £600 I guess as I will be selling off any replaced components. Would really appreciate the advice.

 

[ACESHIGH]

AMD Opteron UP 146 San Diego 2.0GHz 1MB Cache (Socket 939) - Retail (CP-142-AM)
£152.69

Abit KN8 Ultra nForce4 Ultra (Socket 939) PCI-Express Motherboard (MB-087-AB)
£70.44

BFG GeForce 7600 GT OC 256MB GDDR3 VIVO TV-Out/Dual DVI (PCI-Express) - Retail (GX-019-BG)
£152.69 ** This Week Only **

Western Digital Caviar Special Edition 400GB 4000KD SATA 16MB Cache - OEM (HD-050-WD)
£139.77

Philips SPD2400GM 16x16 DVD±RW Dual Layer ReWriter (Beige) - OEM (CD-007-PH)
£25.79

FSP Sparkle AX500-A Blue Storm 500W ATX2.0 PSU (CA-005-SK)
£58.69

2gb Corsair PC3200 XMS ***Keep from old system***

Total = £600.07 Including VAT

 

[Khrest]

Thanks Matey.

Two questions though, to what extent is a 7600GT going to outperform what is effectively a 6800U ?

Also, any idea whether the reserator block is compatible with the 7xxx series gpus?