Vmod 3850 through BIOS apparently IS possible....

[Bo_Fox]

And here is the modded bios from the same one in my last post, but with 3870 voltages. It is the same as the one that the-strokes edited for me, but I fixed the checksum so that it's exactly the same as default (no need to 'force' flash).

(Keep in mind that it does not allow for overclocking within CCC but can be overclocked just fine using Rivatuner). This one gave me a 50Mhz stable core boost over the default one.

Description:
HIS Radeon HD 3850 IceQ3 TurboX 512MB 736/982 default clocks
MODDED BIOS WITH 3870 voltage (2-D: 1.241v, 3-D: 1.327v)

[motox]

And here is the modded bios from the same one in my last post, but with 3870 voltages. It is the same as the one that the-strokes edited for me, but I fixed the checksum so that it's exactly the same as default (no need to 'force' flash).

(Keep in mind that it does not allow for overclocking within CCC but can be overclocked just fine using Rivatuner). This one gave me a 50Mhz stable core boost over the default one.

Description:
HIS Radeon HD 3850 IceQ3 TurboX 512MB 736/982 default clocks
MODDED BIOS WITH 3870 voltage (2-D: 1.241v, 3-D: 1.327v)

thanks for this... Ive got the non 'X' Turbo 3850 and was stable at 777/1000 with default BIOS/voltage. Flashing with your modded volt BIOS took me up to 810/1000 stable in Crysis, and 823/1100 stable in the ozone fur benchmark.

Cant wait for the next ATItool... Im sure this thing will fly with just a tad more voltage and better cooling, which is my next step.

[Rick Hunter]

thanks for this... Ive got the non 'X' Turbo 3850 and was stable at 777/1000 with default BIOS/voltage. Flashing with your modded volt BIOS took me up to 810/1000 stable in Crysis, and 823/1100 stable in the ozone fur benchmark.

Cant wait for the next ATItool... Im sure this thing will fly with just a tad more voltage and better cooling, which is my next step.

I have the same card. With more voltage, it will fly:
http://www.xtremesystems.org/forums/...&postcount=234

[Greg_1]

Could someone please mod my bios to 1.33V
big thx in adv

[Bo_Fox]

Oh, great! How much can you oc with ATiTool? Don't forget to verify the overclock in Rivatuner monitoring! Just in case it still didnt work I did another bios edit but this time the idle voltages are the same as 3850's default. Only the 3D load voltages are at 1.327v, equal to 3870's. Maybe it would work with CCC and/or Rivatuner overclocking.

Description:
HIS GeCube 3850 X-Turbo III 512MB 725/900 default clocks
MODDED BIOS WITH 3870 LOAD voltage (2-D: 1.014v, 3-D: 1.327v)

Flashing guide: http://www.iax-tech.com/howto/atiflash/01.htm

click on "I Agree" to view content (no need to use "-f" to force flash.. better to not use it).

[bL33d]

think mine just sux cant go any higher with more volts 750 max ty though

[bL33d]

669MHz/829MHz/1.33V/boot
$0a00030100 Performance level 1 : 669MHz/829MHz/1.33V
$0a00030200 Performance level 2 : 669MHz/829MHz/1.33V
$0a00030001 PowerPlay state 1 : 725MHz/900MHz/1.24V/Overdrive
$0a00030101 Performance level 1 : 725MHz/900MHz/1.24V
$0a00030201 Performance level 2 : 725MHz/900MHz/1.33V
$0a00030002 PowerPlay state 2 : 725MHz/900MHz/1.33V
$0a00030102 Performance level 1 : 725MHz/900MHz/1.33V
$0a00030202 Performance level 2 : 725MHz/900MHz/1.33V
$0a00030003 PowerPlay state 3 : 725MHz/900MHz/1.33V/UVD
$0a00030103 Performance level 1 : 725MHz/900MHz/1.33V
$0a00030203 Performance level 2 : 725MHz/900MHz/1.33V


Those 1.24 are fine? or are they suppose to be 1.33?

[eva2000]

And here is the modded bios from the same one in my last post, but with 3870 voltages. It is the same as the one that the-strokes edited for me, but I fixed the checksum so that it's exactly the same as default (no need to 'force' flash).

(Keep in mind that it does not allow for overclocking within CCC but can be overclocked just fine using Rivatuner). This one gave me a 50Mhz stable core boost over the default one.

Description:
HIS Radeon HD 3850 IceQ3 TurboX 512MB 736/982 default clocks
MODDED BIOS WITH 3870 voltage (2-D: 1.241v, 3-D: 1.327v)

Thanks use this bios http://www.xtremesystems.org/forums/...3&postcount=90 after unsuccessfully editing my own HIS HD3850 IceQ3 Turbo bios and happy to say I've gained some ground

before

2x 512MB HIS HD3850 IceQ3 default 720/910 oc'd to 783/1098mhz CF via ATI CCC.

after

1st card does 837mhz GPU
2nd card does 824mhz GPU

haven't tested max mem yet past 1152Mhz.

[Bo_Fox]

Thanks use this bios http://www.xtremesystems.org/forums/...3&postcount=90 after unsuccessfully editing my own HIS HD3850 IceQ3 Turbo bios and happy to say I've gained some ground

before

2x 512MB HIS HD3850 IceQ3 default 720/910 oc'd to 783/1098mhz CF via ATI CCC.

after

1st card does 837mhz GPU
2nd card does 824mhz GPU

haven't tested max mem yet past 1152Mhz.

Just curious.. how are you overclocking those 2 cards in Crossfire? I'm guessing Rivatuner because I didnt think that RT supports dual-overclocking??