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ASUS PEG Link Mode Guide Rev. 2.0
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Examination Of Clock Speed Changes

We attempted to find out the exact effect PEG Link Mode had on various PCI Express graphics cards' clock speeds. So, we tried checking their clock speeds using the following utilities :

      • NVIDIA's Overclocking Utility (thanks to the Coolbits hack)
      • Rivatuner
      • Powerstrip

We checked the clock speeds after booting up the testbed. We also checked for changes in the clock speeds with a 3D game running in windowed mode.

Unfortunately, only Rivatuner was able to detect the clock speeds of the NVIDIA cards on the hardware level. This is a sample of the report we were able to obtain :

The ATI X300 was easier by comparison - the ATI Tray Tool supported hardware detection of the clock speeds.

Let's take a look at the results...

 

The Testbed

Processor Intel Pentium 4 630 (3.0GHz) Socket 775
- overclocked to 3.6GHz @ 240MHz x 15
Memory

OCZ DDR2 PC2-6400 Gold Series (512MB x 2)

Motherboard ASUS P5AD2 Premium
- Intel 925X
- Socket 775
- BIOS version 1010
Hard Disk 120GB Western Digital WD1200
Graphics Cards NVIDIA GeForce 6800 GT PCIe
- 400MHz core, 550MHz memory
NVIDIA GeForce 6800 Ultra PCIe
- 400MHz core, 550MHz memory
NVIDIA GeForce 7800 GT PCIe
- 400MHz core, 500MHz memory
NVIDIA GeForce 7800 GTX PCIe
- 430MHz core, 600MHz memory
Sapphire X300 128MB 128-bits PCIe
- 325MHz core, 200MHz memory
Graphics Drivers NVIDIA ForceWare 77.77
ATI Catalyst 5.7
Operating System Microsoft Windows XP Professional SP2
Power Supply ACRyan RyanPower2 450W



 

 
   
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