Aikei

If anybody knows a way, guide, or something like that. Plz help me, or is it impossible ???

MFG Taichu

You can look my guide http://forum.techinferno.com/clevo/4316-%5Bguide%5D-amd-hd7970m-enduro-vbios-modify-flashing-p1x0em-etc.html

@katopll

@ 1.050V x1GHz absolutely no problem for the 7970M, why do you have 1.055V?

it all depends on the quality of the videocard. My Card is unstable after 970Mhz Core clock without overvolting.

he seems bussy, cant some1 else change it, i even figured out how but im still not 100% shure. a simple overvolt to 1.1v would already be enough

I can help you in this weekends, please wait.

Nice! Is it easy to do it?

It's easy, but for beginning try to flash any your vbios with CRC 0x400. If it doesn't work i will write as much as possible to fix it.

Aikei, just noticed something my original bios has 0xC400 CRC but after i flash the moded bios changes to 0xC500, if ia put back the stock bios it reverts back to 0xC400. Is this suposed to happen?

I successfully flash vbios with CRC 0x400 to my card, when it requeres CRC 0x800 and CRC of my card is 0x400 again

But it is estetical only, CRC haven't effect for card stability or perfomance.

What are the " adjacent values"?

Sorry for my english (i am from Russia)

ajacent values it is same voltage values in vbios, identical voltage values are arranged adjacent to each other. For exaple (in your vbios):

Thx again! I will try your version! Have you changed the values with Radeon bios editor or another program or directly with hex-editor? greetz

Thx for your help but it still runs on 1.1 Volt. Has anybody else an idea why i can't undervolt or overclock my card via bios?

I use Free Neo Hex Editor.

I can try changy some voltage values, but I'm not sure it's safe. If the replacement of certain values ​​does not help, then you need to change the adjacent values

Alright, awesome, thank you! So I can just send my 7970m in, and not have any serious downtime, then, right?

If you follow the guide, you will not have any problems

I looked at you vbios, it seems that everything is done right, but try this (1.0volt)

i try to overclock your vbios later

6990m_undervolted.zip

Thank you for your help guys. Dumb question heading your way: is the vbios stored on the bios chip itself, or within the 7970M unit? Because I've been approved for my RMA request, but I wanted to know if I have to send in my whole system or just the dGPU?

vbios stored on dGPU bios chip

Can you post your modified vbios ROM file?

there is nothing to worry about. My CRC was changing too (Current CRC 0xC700) only after few flashings of overvolted vbios. I just corrected the required CRC.

We can't change CRC to first state (possible only when flashing the factory vbios with disabled CRC checking with ATIwinflash, but it's impossible, only atiflash for dos can skip CRC checking)

I can't find the voltage hex string in my vBIOS file. Is it possible that it's not the exact same values as in yours? Added my vBIOS as attachment

[ATTACH]8620[/ATTACH]

Your values is identical with my guide:

Quote

Guys, I made a very dumb mistake... I used this method of being able to flash vbios's to our 7970M card (I have a Sager NP9150) with this bios:

AMD release HD 7970 Ghz bios upgrade for Reference HD 7970 !

I was just experimenting, thinking i'd be able to get back to the original vbios if It didn't work out that well. Well, here's my problem. It wouldn't flash, saying the IDs don't match, so I forced it. Then, rebooted. The Hardware ID now changed, and I could install drivers for it, but I can't activate it because of the Enduro. There's no option to enable it in Catalyst Control Center anymore. It's basically in limbo.

Installing the regular way through windows says that there is no adapter, and trying with dos from my flash drive says the same thing... My BIOS says that there is no VGA adapter, maybe because it doesn't recognize it with the new HWID?

My old HWID was: PCIVEN_1002&DEV_6800&SUBSYS_51051558&REV_00 Now it is: PCIVEN_1002&DEV_6AAF&SUBSYS_51051558&REV_00

Is there anything I could try guys? I haven't bothered with trying through DOS (on my flash drive) yet, because I read we were having difficulties...

So to summarize: I flashed a different cards vbios, now I can't use it or flash back.

But when checking with hardware monitor in 3d apps i givesme 1.0v, maybe the app is not reading correctly

Hm, I realized. First state in my guide (for 3d-perfomance mode) it is voltage for Boost mode (absent in our model), second state it is 3D-mode for gaming and etc, and it haves 1000 value (1.0v).It is therefore likely to Dell vbios for HD7970M changed both values.

Your stock voltage is 1.05? mine is 1.00v :\

Hm. In your vbios voltage state for 3d-perfomance mode have 1050 value (1.05v)

My card reaches 970Mhz for core with stock voltage (1,05V) and 1500Mhz for Memory (it is very good result for memory ).

Just flashed it. Works like a charm! Many thanks aikei!

You are welcome

P.S.

Added Overvolting Guide

Now i find method to overvolt HD7970M, i compared stock and overvolted Dell HD7970M vbios and found the right values. After experimentation, I'll add it to the guide

0xC400 thanks

7970mP150EM_900_1300.zip

Try it

Here you go. Can you mod it for 900/1300?

[ATTACH]8605[/ATTACH]

Which CRC shows in atiwinflash for your vbios?

Thanks for the advice but alreay done that, even change thermal pads, temps at 925/1300 are 80c playing crysis 3. I think im good to go.

- - - Updated - - -

Just one final question, is the crc value equal for any clocks? can i use the B4 for my clocks?

No-no, CRC Checksumm have any value for any clocks, you must fix it for your clocks. If you need help - attach you vbios file

Thanks again. Will post my results as soon as i flash it. It will help alot of people in my situation

I recommend to change your Thermal Compound for overclocking to Arctic Cooling MX-4

Im such a noob when it comes to this things. Can you please say whats the correct string for 900/1300 and 925/1300? Thanks

- - - Updated - - -

Btw, to flash the rom do you need to be in a game too, just like when saving the bios?

900 = 90000 = 15F90 = 1 5F 90 = 90 5F 01

925 = 92500 = 16954 = 1 69 54 = 54 69 01

1300 = 130000 = 1 FB D0 = 1FBD0 = D0 FB 01

900/1300 = 905F01D0FB01

925/1300 = 546901D0FB01

If discrette GPU not active - you can't flash it, atiwinflash does error message

Wow. Thanks alot m8! Can i buy you a beer? i Will try it tomorrow! Will post may results as soon as i flash it

- - - Updated - - -

Just one quetion, how do you reverce the hex values? Because they have a 0 more than the unrebersed one, and theres no logic. Do you reverse it with windows calc as well?

I like a beer, but i don't now hou i can get it from you

Reverse 1 byte values (1 byte = 2 symbols in hex), example:

17AE8 = 1 7A E8 = E8 7A 01