ATI 4850/4870 voltmod thread

[Barr3l Rid3r]

New Bios mod for use in ATi 4850 512mb Qimonda w/ or without default cooler.

Improovements:

1) Less Clock and voltage while in Idle mode, bringing better durability an lower idle temps.

2) Higher voltage and default 3D VGPU Clock while in FULL load mode (680/1000Mhz).

3) Higher overclock limit in default ATi CCC driver (800Mhz GPU highest setting) and also better overclock ability cause of the higher default 3D voltage.

4) Adjusted Default cooler fan speed adequately, to keep it cool and quiet.

http://rapidshare.com/files/148699499/4850mod.rom.html



And that is custom made one for hardmodded cards.





Idle GPU @ 400Mhz 1.02V







Full Load GPU @ 830Mhz 1.33V




How to


Windows XP, use last Ati Winflash utility, for Vista must do via DOS floppy disk or Pendrive w/ booting abilities.

Pendrive:

1) Get HPBOOT

http://rapidshare.com/files/107282064/HPUSBFW.zip

2) Get BOOT Files

http://rapidshare.com/files/107282214/USB-Boot.zip

3) Unzip All for both and run HPBOOt, select your pendrive, check quick format and create DOS startup disk, files located at: choose extracted folder containing Boot files.

4) Get and unzip ATiflash 3.60 and then copy the extracted files to your pendrive don`t forget the bios file 4850mod.rom linked above.
http://www.techpowerup.com/downloads...lash_3.60.html


5) Set pendrive as first boot and also first disk in your motherboard bios.

Run:

Atiflash -f -p 0 4850mod.rom