8600MGT underclocks under load?

I believe I have had this problem for a long time but only started noticing after I've been using rivatuner with background monitoring enabled.

It does it if its overclocked or not.

This was in the middle of a normal GTA4 scene



As you can see under load at about only 63 degrees it decides to go into low power mode. Ive cleaned out all the heatsink and fan dust which has lowered the temperature (used to run at 70+) but it still goes into low power mode anyways!

Also I have already followed another guide which is supposed to stop powermiezer by changing registry keys.

Any other solutions to stop it from doing this?

vista 32bit sp2
t5550 1.8Ghz
3 gigs ddr2
8600m GT 256mb DDR2

 

Riva has never been an accurate way to read the clocks of your GPU. It also shows the same thing on my 1720's 8600M GT. And I wouldn't bother by it. As long as you do NOT experience any form of performance lag during games and it plays at a constant framerate as it always used to be, then it's not an issue.

Use GPUz, it shows the correct and constant clocks of the card under the sensors tab. I have managed to disable powermizer on my 1720 using DOX's 195.62 drivers running at stock speeds. (God bless that man and his wonderful driver mods ) what drivers are you currently using?

 

ah I have the dox drivers! sweet ill install them. currently using 180.84

 

I think I have a similar issue. I haven't been able to fix it, but so far it points that the underclocking is due to a failure of the fans to it. I has happened me recently with Fallout 3 and Dead Space. Basically everything becomes sluggish, and the only solution is to exit the game and enter again. By the time it exits the game the fans hit to maximum speed for a while.

Has anybody noticed something similar or know of a solution?

 

even with the dox drivers it still underclocks under load BUT only when overclocked. works fine if I don't overclock it now.

lozanogo have you installed the dox drivers?

also you might like to try this http://forum.notebookreview.com/showthread.php?p=3503667#post3503667

I really wanna be able to overclock!

 

use this
http://majorgeeks.com/EVGA_Precision_d6209.html
and make it display your reading during game play and your fps.

 

You will need to force constant performance level in rivatuner. google it.

 

perfect Thank you

 

I recommend using HWmonitor to check your temps and GPUz to get detailed info on what your GPU is doing in real-time. I think it beats the rivatuner monitor.

 

Boo, glad that you have got it working. I just checked my machine, it didn't downlock at all even while playing.

I'll second that as for GPUz and HWM; I would highly recommend those monitoring tools instead. GPUz v0.38 has improved very much since; heck, it can even tell you how much VRAM you're using. The Sensors tab has changed alot since v0.35