Vmod 3850 through BIOS apparently IS possible....

[spectrum48]

There is no senese for using 1.24V for 300MHz in 2D. It's much better to use 0.974V for lower temp in Idle.

indeed, i'll try and make a bios with only 3d voltage change

about atiwinflash, it's very weird, i used it twice, but now it won't work
i'll try atiflash thanx

[jimmyz]

Just so you guys know dicussion of undervolting can lead to a ban here this is XtremeSystems after all, if it ain't die'in you ain't try'in.

hopefully the crossfire clocking can be easier with these modded bios's this generation of cards have tremendous potential.

[ken]

I have tried the sapphire bios from "the-strokes" but it doesnt work on my Powercolor 3850 512MB so can anyone mod my bios please?

cheers

[Eldonko]

Yeah I couldnt get the HIS BIOSes to work on my Sapphire either, best is to get your actual BIOS modded. Checksum issue no doubt but that is above my head...

[spectrum48]

here is sapphire hd3850_512 bios with stock 2d and 1.33v 3d voltage

btw there is no option in P5K to boot from usb drive? this is rediculus, i can't flash a ****** bios

[Bo_Fox]

here is sapphire hd3850_512 bios with stock 2d and 1.33v 3d voltage

btw there is no option in P5K to boot from usb drive? this is rediculus, i can't flash a ****** bios

Many motherboards search their USB ports when you set it to boot from a "Removable" device (and that usually includes floppy drives). It might just be a tricky BIOS with misleading settings.. if that P5K really does not allow for it I'd be surprised.

[spectrum48]

Many motherboards search their USB ports when you set it to boot from a "Removable" device (and that usually includes floppy drives). It might just be a tricky BIOS with misleading settings.. if that P5K really does not allow for it I'd be surprised.

hmm yeah it is very strange indeed if it doesn' support usb boot

as far as i can see there is only floppy drive option, i'll try and see if it boots from usb when floppy is selected

edit: indeed it works, i had legacy usb support disabled that was all
feel free to throw me the tomatoes

now what's the syntax to use with atiflash?

[saaya]

atiflash -p -f 0 filename.rom

[Bo_Fox]

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

click on "I Agree" to view content

[spectrum48]

a million thanx to all of you for your help and patience

got it to flash, but i'm only getting 1.27v 3d
this is not worth it, i'll do the hardmod and be done with it

@ least i can do 810mhz core now

[Eldonko]

I have a P5K, all you do is set HD as first priority and set the usb drive as 1st HD. All under boot menu

[spectrum48]

I have a P5K, all you do is set HD as first priority and set the usb drive as 1st HD. All under boot menu

yes i got it now, thank you, my problem was that i had usb legacy support off, and couldn't set the removable drive as udb drive.
it's all sorted now

last time i flashed vga bios was with a 9800pro @ xt, and this was the first time i had to boot from a usb drive
you people here @ xs are too good/patient with dumbheads like me

[nature49]

Hi, my card is HIS HD3850 512M IceQ3Turbo X, i have tried the HIS3850_512MB_3870volt.zip provided by BO FOX, the voltage indicated by Rivatuner is just the same as HD3870, but it seems that the OC ability doesn't improve much, i can only get around 770M hz for the max core speed, so is there some limit in the bios to go beyond 777Mhz? Or my card itself is not good for OC? Here is my default bios:

[Niccolò]

Question:

Is there a bios for Sapphire 512 with 3d at 1.33v that's confirmed working?

If no, is there anyone that could overvolt through bios? Couse it seems that everyone's trying but only 2 ppl on 1000 could do it and don't know why.

[robbot]

so finally somebody can post here

unlocked bios for sapphire 3850 256mb with changed only the 3d voltage ?

[spectrum48]

Question:

Is there a bios for Sapphire 512 with 3d at 1.33v that's confirmed working?

If no, is there anyone that could overvolt through bios? Couse it seems that everyone's trying but only 2 ppl on 1000 could do it and don't know why.

i have posted one here, only that it gives 1.274v and not 1.33v 3d

[Chukundur]

so finally somebody can post here

unlocked bios for sapphire 3850 256mb with changed only the 3d voltage ?

Here you are.

[robbot]

are u sure is that unlocked ?

[bL33d]

Can someone mod this to 1.33v thanks!!!

btw tried most of the modded 512 bioses and they all give no video output i have to blindflash to original.bin so i guess i have to use gecube bios.....?

Here is what rivatuner is telling me my voltage is... That cant be right is it??

$0a00000000 Title : XHD3850PG3-E3 S2O
$0a00000001 Date/time : 11/19/07 01:05
$0a00000002 Core clock : 725.000MHz
$0a00000003 Memory clock : 900.000MHz
$0a00000004 Reference clock : 27.000MHz
$0a00030000 PowerPlay state 0 : 669MHz/829MHz/1.21V/boot
$0a00030100 Performance level 1 : 669MHz/829MHz/1.21V
$0a00030200 Performance level 2 : 669MHz/829MHz/1.21V
$0a00030001 PowerPlay state 1 : 725MHz/900MHz/1.01V/Overdrive
$0a00030101 Performance level 1 : 725MHz/900MHz/1.01V
$0a00030201 Performance level 2 : 725MHz/900MHz/1.21V
$0a00030002 PowerPlay state 2 : 725MHz/900MHz/1.21V
$0a00030102 Performance level 1 : 725MHz/900MHz/1.21V
$0a00030202 Performance level 2 : 725MHz/900MHz/1.21V
$0a00030003 PowerPlay state 3 : 725MHz/900MHz/1.21V/UVD
$0a00030103 Performance level 1 : 725MHz/900MHz/1.21V
$0a00030203 Performance level 2 : 725MHz/900MHz/1.21V
$0a00000008 Memory type : DDR3

[Chukundur]

are u sure is that unlocked ?

No, but Are you sure that you can reach 862MHz?

[KainXS]

exactly

[bL33d]

Please

[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.

[tarkin77]

Can someone mod this to 1.33v thanks!!!

btw tried most of the modded 512 bioses and they all give no video output i have to blindflash to original.bin so i guess i have to use gecube bios.....?

Here is what rivatuner is telling me my voltage is... That cant be right is it??

$0a00000000 Title : XHD3850PG3-E3 S2O
$0a00000001 Date/time : 11/19/07 01:05
$0a00000002 Core clock : 725.000MHz
$0a00000003 Memory clock : 900.000MHz
$0a00000004 Reference clock : 27.000MHz
$0a00030000 PowerPlay state 0 : 669MHz/829MHz/1.21V/boot
$0a00030100 Performance level 1 : 669MHz/829MHz/1.21V
$0a00030200 Performance level 2 : 669MHz/829MHz/1.21V
$0a00030001 PowerPlay state 1 : 725MHz/900MHz/1.01V/Overdrive
$0a00030101 Performance level 1 : 725MHz/900MHz/1.01V
$0a00030201 Performance level 2 : 725MHz/900MHz/1.21V
$0a00030002 PowerPlay state 2 : 725MHz/900MHz/1.21V
$0a00030102 Performance level 1 : 725MHz/900MHz/1.21V
$0a00030202 Performance level 2 : 725MHz/900MHz/1.21V
$0a00030003 PowerPlay state 3 : 725MHz/900MHz/1.21V/UVD
$0a00030103 Performance level 1 : 725MHz/900MHz/1.21V
$0a00030203 Performance level 2 : 725MHz/900MHz/1.21V
$0a00000008 Memory type : DDR3

I also have this Gecube 3850 OC card... and waiting for a working mob-bios...

I've tried other mod-bios, but none of them seems to work for me.

[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