It seems the my gfx performance has gone to the dogs since i update, im using the ati 4850 1gig, I backed up the needed kekts etc for my ati before doing anything and then put them back as described on netkas.org, desktop seems slow almost stuttering to bring up icons, while with I-Tunes the Visualizer dont work anymore.
Any got any ideas.
System specs in my sig.

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im a PC running Snow Leopard

MB: GigaByte EP45T-Extreme (F4)
CPU: Intel Q8200 2.33ghz
Bootloader: EFI 10.5/Chameleon
OS: SL 10.6.2
RAM: 4 X 2GB G.Skill 1066MHz DDR3
HD: 1x64gig Crucial SSD OS drive / 2x 500GB SATA-2
Gfx: ATI 4850/1GB-DDR3
DVD: Samsung 18X DVD-R/RW DL SATA
Bluray:Samsung SH-B083L/BSBP
LAN: Ethernet On-board
WIFI: EdiMax PCI
Firewire: Onboard
Case: Antec 300
Keyboard: Apple Slim Keyboard.
Mouse: MS USB
Monitors: Dell 24" + Optoma HD65 Projector + 102" Screen