OSX freezes after 5 mins of inactivity

[jayfray]

Hey guys
I just edited cause i have more questions.

Here is my specs first of all
----------------------

Dell Dimension E521
AMD 64 5000+
4 Gigs ram, (2 gigs factory, 2 gigs kingston bought separately)
320 Gigs HDD and 500 gig Hdd with windows(temporarily removed)
Generic DVD burner
Logitech Bluetooth dongle from MX5000 keybo/mouse combo
AC97 HD 7.1 intergrated sound card
NVidia 8800GT OC from BFG and I also have (uninstalled ATI X1300 pro)
gear head keyboard/mouse (mac edition)

I have the LEO4ALL V2 and will be looking for V3 or higher

So I had recently installed OSX 10.5.1 onto the PC. Took a few combinations but was successful. But I had the problems
- According to OSX86 wiki they said the 8800GT OC was compatible and recognizable to OSX. Got it to recognize with nvinject 0.2.1 but the specs in the info are off.
- Graphics by NVIDIA:
-
- Chipset Model: Graphics by NVIDIA
- Type: Display
- Bus: PCIe
- PCIe Lane Width: x16
- VRAM (Total): 512 MB
- Vendor: NVIDIA (0x10de)
- Device ID: 0x0611
- Revision ID: 0x00a2
- ROM Revision: NVinject 0.2.1
- Displays:
- Display:
- Resolution: 1680 x 1050
- Depth: 32-bit Color
- Core Image: Software
- Main Display: Yes
- Mirror: Off
- Online: Yes
- Quartz Extreme: Not Supported
Again according to OSX86 CI/QE should be fully supported.

How could I get this to work? In the instalation I have the option of using NVidia kext but system locks up at boot, but if i use nvinject i get no problems but the info above. also i had to input the graphics mode at 1680x1050x32 into apple plist. I can't use the card to its full extent. both dvi and resolution changes and what not.

secondly i have no sound off the intergrated sound card I have an m-audio fast track solo usb audio interface but works fine. but I would like to used the 7.1 audio. I've searched for drivers but found nothing.

thirdly I get a system freeze when i walk away from the PC and I now realize from the sticky above its the amd chip. but couldn't find any solution. I'll keep diggin deeper.

If anyone could help me it would be greatly appreciated. Thanks sooo much