Naw, I have AB set to OC my 460, and mine used to also downclock in Civ 5, aswell as Starcraft 2 just recently.
You need to go to nVidia Control Panel> Manage 3D Settings. Click the Program Settings Tab and look for Skyrim in the drop-down, if it aint there, click on the add button, and find Skyrim.exe in your game directory (Program Files).
Once you've added it, click it in the drop-down if it's not already there, then scroll down the list to Power Management Mode
, click just to the right of it, and select Prefer Maximum Performance
[EDIT] It's also possible you're suffering from a Driver Crash. Try nVidia's very latest Drivers if the above fails, making sure you do a Custom Installation, and check the box for Clean Install
It's also possible that Skyrim is making your card's OC unstable, and causing the Driver Crash, different Drivers and different Games stress the GPU differently, if the above Driver installation doesn't work, you may want to back off your OC by 10-20Mhz just for Skyrim.
Originally Posted by Broseidon
MSI Afterburner is usually the culprit. If you save your overclock into a profile, it tends not to underclock if you switch it with that
Ah, OP meant his card is underclocking whilst he's gaming, not that it's not underclocking when not gaming.
For the record, I've used AB and prior RivaTuner (same thing, principally), and unless I force 3D mode, when OC's are applied, even auto-startup with AB, it'll still downclock when full performance aint needed.Edited by EvoBeardy - 11/12/11 at 6:14pm