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Title: Software undervolting an R9 270 in Windows Post by: anonuser777 on March 06, 2014, 03:00:42 PM 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?? https://i.imgur.com/y8PIjuM.png (http://imgur.com/y8PIjuM) Title: Re: Software undervolting an R9 270 in Windows Post by: grippy54 on March 11, 2014, 03:06:24 AM I've been looking into undervolting myself. It seems there are some cards that require a bios flash to undervolt and no software will work. I'd love to hear from someone more experienced with it.
Title: Re: Software undervolting an R9 270 in Windows Post by: anonuser777 on March 11, 2014, 09:02:08 PM I've been looking into undervolting myself. It seems there are some cards that require a bios flash to undervolt and no software will work. I'd love to hear from someone more experienced with it. The card does require a BIOS flash to undervolt it, but these guys report successfully doing it - http://forums.overclockers.co.uk/showthread.php?t=18577286 The Gigabyte R9 270 can also be undervolted but it's apparently a little more difficult - https://litecointalk.org/index.php?topic=16907.0 I'll do some further research, but I'm a little hesitant to BIOS flash it as there's no alternative bios switch if I make a mistake. |
