Need some help undervolting an MSI R9 270 Gaming 2G. I'm using Windows 7 and Catalyst 13.12. I've tried pretty much everything including:
1. MSI afterburner (Version 3 beta, and all prior versions). The core voltage box is greyed out and can't be changed. Even when unofficial overclock mode is enabled (in GUI or manually, using this guide -
http://forums.guru3d.com/showthread.php?t=327291 ).
2. Sapphire Trixx - I can overvolt the card (from a stock VDDC of 1.188v) but undervolting doesnt seem to do anything, and the voltage remains at 1.188v in GPU-Z.
3. Messing with the ATi CCC profiles, like in this post
http://forum.notebookreview.com/msi/538668-gx640-automatic-downclocking-undervolting-using-ccc-profiles.htmlStrangely, I can downvolt the card to 1.15v but only with a CC of 900 and MC 1400, so not much use to me. I can't remember exactly how I did it, but I think I turned off catalyst control, messed with some settings in profiles.xml then used trixx to overvolt it. Setting the voltage (using Trixx) to anything over 1.188v would cause a glitch that set the voltage to 1.15v (screenshot below). The clock settings are too low to be of any use though.
I don't want to flash the bios, but for anyone that does, this info may help -
http://www.reddit.com/r/litecoinmining/comments/1wc5th/bounty_undervolting_gigabyte_r9_270_bios/ Does anyone know a way to undervolt this card using software tools??
