7800GTX seeing a weird speed ...

[rajs]

Have a eVGA 7800GTX Factory OC at 450 / 1200. Drivers are Forceware 77.77 and have RivaTuner 15.6 installed.

I've set my 3D Performance settings to 490 GPU / 1275 RAM. I ran the Hardware monitoring item within RivaTuner and noticed the following behavior.

Standard nothing running really except normal Windows apps and the RivaTuner Monitoring is showing ~ 275 CPU and ~ 1275 RAM speeds.

I go into BattleField2 and I see the following - The CPU Speed jumps to 529 ... RAM stays at ~ 1275. When I exit the game the graph in the RivaTuner Hardware monitoring shows the CPU goes from 529 ... steps down to 450 for a few seconds and then steps fully down to 275. The RAM stays the same speed.

Question -- Why is it jumping up to 529 MHz speed when I've only selected 490 ?

Anyone else seen this ?

BTW -- I've seen this with both WoW and BF2. I am running 1920x1200 res and have confirmed the 490/1275 speed setting in the Forceware Driver also under the display properties, adv settings, 7800GTX Tab, etc area.

Thanks!

 

[trinibwoy]

This has been all over the internet. Google is your friend.

http://www.bit-tech.net/news/2005/07/07/g70_clock_speed/

 

[dagon11985]

The 7800gtx kinda powers down when its not needed. I guess its kinda like amd's " Cool and Quite "

 

[Zinn]

The 7800gtx kinda powers down when its not needed. I guess its kinda like amd's " Cool and Quite "

Except on the 7800 it actually works

 

[arman01]

Except on the 7800 it actually works

um...Cool and Quiet DOES work...

1) enable it in your BIOS
2) choose Portable/Laptop in control panel>power option>power schemes

 

[Major_A]

The card going down to 275 is called the 2D clock.