Thanks guys answering my question,

Whenever i want to shutdown/restart my computer it shuts down the monitor, the harddrives, but my graphics card remains on, until I press and hold the shutdown button of my computer. Is there a way to fix this, or at least tell me if this is bad for my graphics card? Thanks!

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MOBO: HP M8100n AMD Media Center TV PC
OS: 10.5.8 (Updated from iPC OSX86)
Kernel: 9.8.0 Voodoo Kernel
Processor: Athlon 64 X2 with Dual Core technology
MotherBoard: MCP61
Graphics: nVidia 9600gt 512 mb
Audio: Realtek ALC888: Digital Output
Chipset: Apple nForce ATA
Ethernet: MCP61 LAN (Realtek RTL8201N)