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Under-volting BIOS update but VDDC unchanged
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Topic: Under-volting BIOS update but VDDC unchanged (Read 783 times)
andersh
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Under-volting BIOS update but VDDC unchanged
February 16, 2014, 09:29:34 PM
#1
I have a couple of cards, a PowerColor HD7850 and a VTX3D HD7770. I'm trying to under-volt the VTX3D 7770 initially.
Even though atiflash says it worked, when I start GUIMiner the VDDC is reported at 1.175v, even though I've modified the BIOS for a lower value. Have tried VDDC settings of 1125, 1075 and 1025.
The steps I took are:
- Used VBE7 (0.0.7b) to:
- backup the original BIOSs
- modify the VTX3D 7770's BIOS fan profile and VDDC State 1 - Performance
- Booted into DOS and used the atiflash (4.17) to flash the new bios to the VTX3D
The change in fan profile does seem to have worked, but not the VDDC settings. Have I missed a basic step??
OS is Win 8.1.
andersh
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Re: Under-volting BIOS update but VDDC unchanged
February 16, 2014, 10:00:03 PM
#2
Okay, so err, my GFX card has just decided to start accepting the new VDDC settings. I didn't do anything, other than write this post.
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