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Could someone edit my 4770 bios to up voltage?

Joined
Dec 28, 2007
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Processor AMD Phenom II X4 955 BE Deneb @ 3.7GHz
Motherboard GIGABYTE GA-MA790XT-UD4P
Cooling ZALMAN CNPS9700 CPU Heatsink
Memory OCZ 4GB DDR3 1600 @ 7-7-7-24 1.85v
Video Card(s) ATI Sapphire OC 7850 1200c/5800m @ 64c Full Load
Storage Western Digital Caviar Black 640GB + Western Digital 1TB External Drive
Display(s) SAMSUNG ToC T240 24'' LCD
Case Silverstone FT01-BW
Audio Device(s) Onboard
Power Supply ZALMAN ZM-750
Software Win 7 x64 SP1
#1
So around 2-3 years ago i had a Sapphire 4770 blue pcb with artic cooling solution.

From day 1 the stock clock of 750mhz was not stable, resulting in minor artifacting , soon after i got a 4890 and forgot about the card.

Now i am building a rig out of old parts for a friend and figured ill try the 4770 again , downclocked the card from 750 to 650mhz and unigine benchmark was suddenly artifact free.

So i figured if the difference is so minor, it cant be a completely broken card. so i downloaded trixx and upped the voltage from 0.95 to 1.00 and viola 750mhz ran flawless.

now trixx is acting a tad picky, sometimes applying voltage, sometimes defaulting, and wont keep the setting when restarting the computer.

I hoped someone could edit my bios to up the voltage so the changes at permanent.

Ive uploaded it below

http://www41.zippyshare.com/v/33604357/file.html

Also are there windows solution out there to flash these custom bios'?

Thanks in advance!
 
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#2
Hi

Make sure you are well read in bios recovery before attempting a vga flash

http://www.techpowerup.com/printarticle.php?id=34

Download GPU-Z and run GPU-Z

Then make a backup of your vga bios [save to file]; keep it safe

Example Extract vga bios.jpg

Next

Download RBE version 1.25 from TPU [our software] and run RBE; then load your vga bios image

Example RBE 1.25 Example.jpg

Select Clock Settings tab

Example RBE 1.25 Clock info 02 & GPU registers Example.jpg

edit GPU (MHz): Clock info 02 from 500 and change to 750

next; adjust Voltage registers: select GPU registers

Example RBE 1.25 GPU voltage registers Example.jpg

next; change 0xD5 from 0.95 to 1

next: save BIOS

Note: it is best practice to flash bioses from a dos prompt

Edit: Bootable flash drive http://www.techpowerup.com/forums/showthread.php?t=162964

However you can use ATI Winflash - [open windows task manager and close all unessential programs before running ati winflash] ; http://www.techpowerup.com/downloads/2107/ATI Winflash 2.0.1.18.html [this is the latest version]

atb (all the best)

Law-II
 
Last edited:
Joined
Dec 28, 2007
Messages
1,368 (0.37/day)
Likes
130
Processor AMD Phenom II X4 955 BE Deneb @ 3.7GHz
Motherboard GIGABYTE GA-MA790XT-UD4P
Cooling ZALMAN CNPS9700 CPU Heatsink
Memory OCZ 4GB DDR3 1600 @ 7-7-7-24 1.85v
Video Card(s) ATI Sapphire OC 7850 1200c/5800m @ 64c Full Load
Storage Western Digital Caviar Black 640GB + Western Digital 1TB External Drive
Display(s) SAMSUNG ToC T240 24'' LCD
Case Silverstone FT01-BW
Audio Device(s) Onboard
Power Supply ZALMAN ZM-750
Software Win 7 x64 SP1
#3
thanks law! will try it this weekend