Frame rate boost with 9800pro by increasing CPU's Vcore - How come?

  • Thread starter Thread starter Ulf Stahl
  • Start date Start date
U

Ulf Stahl

My somewhat overclocked system was/is running stable. No crashes, no
artifacts.
Mobo A7N8X Deluxe Rev 1.06, Bios 1007, 1 G RAM (2x512 MB Kingston HyperX)
XP 3000+ @ 2355 MHz, Vcore 1.750 V
Radeon 9800pro 128 MB @ 441 / 351.
When I increased the Vcore to 1,775 V (letting everything else unchanged) I
got a considerable boost in frame rate,
measured with the FRAPS utility when gaming IL2-FB (OpenGL).
I had this with Cat 4.1 and now Cat 4.2 drivers.

Didn't know there was a connection between CPU-Vcore and FPS.
Can somebody explain this phenomenon, pls?

TIA
Uffe
 
Ulf said:
My somewhat overclocked system was/is running stable. No crashes, no
artifacts.
Mobo A7N8X Deluxe Rev 1.06, Bios 1007, 1 G RAM (2x512 MB Kingston HyperX)
XP 3000+ @ 2355 MHz, Vcore 1.750 V
Radeon 9800pro 128 MB @ 441 / 351.
When I increased the Vcore to 1,775 V (letting everything else unchanged) I
got a considerable boost in frame rate,
measured with the FRAPS utility when gaming IL2-FB (OpenGL).
I had this with Cat 4.1 and now Cat 4.2 drivers.

Didn't know there was a connection between CPU-Vcore and FPS.
Can somebody explain this phenomenon, pls?
Click to expand...

When I did a mo/bo change here, I experienced something similar - when I
had dropped the VCore too far (1.40 V in this case, for two 300A
Celerons), the integer benchmark scores in SiSoft Sandra were reduced by
about 1/8. At somewhat higher voltage (1.50 V), everything was back to
normal. My educated guess is that at the low VCore numerous ECC errors
in the caches occurred, reducing overall performance.

Stephan
 
Back
Top