Alt-Tab, GPU clocks and dual screens.

I run two (uneven 1920x1080&1680x1050) screens and as a result my GPU clocks will always stay at maximum (to prevent a flicker issue with downclocking). This is normal behavior.

However when tabbing in and out of PoE, the game will forcefully lower my clocks to the "2d load" clocks and they will stay stuck there until reboot.

This is happening with the latest nVidia drivers (the gpu is a GTX570), it used to only happen rarely but now it happens quite a lot.

The image provided show my playing PoE, then tabbing out (and having the clocks forcefully drop), then tabbing in and noticing very poor performance as a result then quitting the game.

http://i.imgur.com/PpsQYnR.png

There is nothing I can do, outside of a reboot; to shift the clocks back into the "3D" state. Not even manually trying to change them. This is the only game/program that I have ever experienced this with.

I set one up and that did not solve the problem.

However I seem to have found the trigger: If you tab out of PoE, interact with a window on the second screen, then go back to PoE it will cause the forceful downclock.

It seems there is like a 50/50 chance of the game fucking my clocks on a tab-in no matter what I do. Pretty damn frustrating.

Same issue here, ever find a fix?

Hello

first of all, sorry for bad english.

I found a fix for this issue, at least it worked for me.

My graphic card is a msi 560ti overclocked @ 970Mhz with afterburner (dafault is 880), and each time I alt-tab from PoE to an another app, and alt-tab again to PoE, the clock drop down to 405Mhz (bios 2D profile). A reboot was necessary to fix this.

So, to revert back to the default clock, open your Device Manager, graphic card section, right click on it and choose "Disable". Windows should now use its default vga driver. Right click on it again, and then "Enable". It will reset the graphic drivers, and hopefully goes back to your default clock without rebooting.

(disclaimer : use it at your own risk blabla ...)
To prevent this issue, I just gave more voltage to the graphic chip. For my config, default voltage is 1.0v at 880mhz, and for my overclock at 970 mhz I chose to put it at 1.05v.
It was supported very well by any game or graphic application (including BF3 or Crysis 3), and the additional heat was acceptable. But it seems that for PoE, this voltage was not enough.
I give it a little push, and with 1.075v, the downclock issue seems to be fixed :)
Anyway, dont't forget to check your graphic card temperature !

As said, I used MSI Afterburner to manage overclocking and voltage manipulation, but I guess that any graphic overclocking/monitoring software may do the trick.

Hope it helps :)