Yeah, it's the graphics card that's holding you back there. I doubt you're running out of memory. I doubt you'll need a new power supply but it's always worth checking, do you know what your power supply's output is?
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M/Board: Gigabyte GA-945GZM-S2
CPU: Core2 Duo E4400 @ 2.6GHZ
RAM: 1.5GB
H/D: Western Digital 500GB
Optical: Pioneer 212 SATA DVD burner
Graphics Card: Sapphire ATI Radeon 256mb HD2600 XT
OS: Dual boot: Windows XP and Fedora 8
Monitor: 22" BenQ (FP222W)
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