Problem in Overclocking XFX 6600GT AGP, GPU drops down from 500 to 300 in 3DMark

zachig · Jun 6, 2005, 08:36 AM

Hi!

I've just purchased a new XFX 6600GT AGP.
I'm running it on an EPOX 8RDA3+ mobo with Barton 2500@3200 (200x11), 512MB (2x256MB) Mushkin PC4000 6-2-2-2 with Thermaltake Purepower 480W (True Power).

I tried to overclock the card and tested the performance with 3DMark03, 3DMark05, and tested as well the temperatures on heavy load with "Masaki Kawase rthdribl DEMO".

Here the results:

Stock 500/1000:
3DMark03 - 7650
3DMark05 - 3165
Temps: Idle-54C, Load (after 10min in the rthdribl DEMO)-76C

O.C 550/1100:
3DMark03 - 8365
3DMark05 - 3706
Temps: Idle-55C, Load (after 10min in the rthdribl DEMO)-78C

O.C 570/1150:
3DMark03 - 8649
3DMark05 - 3849
Temps: Idle-55C, Load (after 10min in the rthdribl DEMO)-79C

I'm running the Video Card with STOCK COOLING.

Now...I've noticed that after running 3DMark03/05 and viewing the "System Information" within 3DMark the Memory Clock stays 1100 (or 1150), but the GPU/Core Clock DROPS DOWN TO 300 (In the Nvidia Advanced Settings is keeps showing a GPU Clock of 570).

Running AGAIN 3DMark with the already-dropped-down GPU Clock, I get the same Good results in 3DMark.

So, my question is: what could be the problem, is it related to power supply? Did I overclocked too much, or is it just a MISREADING of the 3DMark Application.

I must say that i don't encounter any instability issues nor artifacts or freezings when overclocked.

What do you recommend? Should i keep the 570/1150 overclocked settings and just ignore the 3DMark reading???

Please advice!!!

goranpaa · Jun 6, 2005, 12:39 PM

Hi!

I would'nt trust those 3d mark tests too much.
Download the small software Fraps instead. Run your tuffest game. or download a demo of DOOM3. And use Fraps, to measure the FPS.

Run the card, at both stock speed and O. C:ed.

I think, this will give a more accurate measure of your cards abilitys.

bigboy177 · Jun 9, 2005, 01:46 AM

The clock drops because of 2D and 3D variants of working... when you run a 3D program, or a game the clocks automaticaly are set to 500... When you get back to 2D the clocks drop... Nvidia tool probably shows only the clock for 3D which can be overclocked... 3D Mark shows the clock currently running...

I hope it's clear now...

Bruuce · Jun 9, 2005, 03:35 AM

Quote:

Originally Posted by bigboy177

The clock drops because of 2D and 3D variants of working... when you run a 3D program, or a game the clocks automaticaly are set to 500... When you get back to 2D the clocks drop... Nvidia tool probably shows only the clock for 3D which can be overclocked... 3D Mark shows the clock currently running...

I hope it's clear now...

yeah what he said.

Jun 6, 2005, 08:36 AM	#1
zachig HardwareHeaven Addict Join Date: May 2005 Posts: 285 Rep Power: 0	Problem in Overclocking XFX 6600GT AGP, GPU drops down from 500 to 300 in 3DMark Hi! I've just purchased a new XFX 6600GT AGP. I'm running it on an EPOX 8RDA3+ mobo with Barton 2500@3200 (200x11), 512MB (2x256MB) Mushkin PC4000 6-2-2-2 with Thermaltake Purepower 480W (True Power). I tried to overclock the card and tested the performance with 3DMark03, 3DMark05, and tested as well the temperatures on heavy load with "Masaki Kawase rthdribl DEMO". Here the results: Stock 500/1000: 3DMark03 - 7650 3DMark05 - 3165 Temps: Idle-54C, Load (after 10min in the rthdribl DEMO)-76C O.C 550/1100: 3DMark03 - 8365 3DMark05 - 3706 Temps: Idle-55C, Load (after 10min in the rthdribl DEMO)-78C O.C 570/1150: 3DMark03 - 8649 3DMark05 - 3849 Temps: Idle-55C, Load (after 10min in the rthdribl DEMO)-79C I'm running the Video Card with STOCK COOLING. Now...I've noticed that after running 3DMark03/05 and viewing the "System Information" within 3DMark the Memory Clock stays 1100 (or 1150), but the GPU/Core Clock DROPS DOWN TO 300 (In the Nvidia Advanced Settings is keeps showing a GPU Clock of 570). Running AGAIN 3DMark with the already-dropped-down GPU Clock, I get the same Good results in 3DMark. So, my question is: what could be the problem, is it related to power supply? Did I overclocked too much, or is it just a MISREADING of the 3DMark Application. I must say that i don't encounter any instability issues nor artifacts or freezings when overclocked. What do you recommend? Should i keep the 570/1150 overclocked settings and just ignore the 3DMark reading??? Please advice!!!

Jun 6, 2005, 12:39 PM	#2
goranpaa DriverHeaven Junior Member Join Date: Dec 2004 Location: SWE Posts: 42 Rep Power: 0	Hi! I would'nt trust those 3d mark tests too much. Download the small software Fraps instead. Run your tuffest game. or download a demo of DOOM3. And use Fraps, to measure the FPS. Run the card, at both stock speed and O. C:ed. I think, this will give a more accurate measure of your cards abilitys.

Jun 9, 2005, 01:46 AM	#3
bigboy177 DriverHeaven Newbie Join Date: Mar 2005 Posts: 5 Rep Power: 0	The clock drops because of 2D and 3D variants of working... when you run a 3D program, or a game the clocks automaticaly are set to 500... When you get back to 2D the clocks drop... Nvidia tool probably shows only the clock for 3D which can be overclocked... 3D Mark shows the clock currently running... I hope it's clear now...