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Author Topic: Re: Software undervolting an R9 270 in Windows  (Read 684 times)
jamieebotwin
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May 20, 2014, 11:07:25 PM
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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.html

Strangely, 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??

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May 22, 2014, 07:35:37 AM
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I see you're reposting the exact same malware as you posted a few days before this one.




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