NotebookForums.com › Forums › Notebook Manufacturers › Dell Forums › Dell Home (Inspiron, XPS, Studio) › changing the 7900gtx to 1.32v
New Posts  All Forums:Forum Nav:

changing the 7900gtx to 1.32v

post #1 of 109
11/12/07 at 4:05am
Thread Starter 
Will changing the voltage on the 7900gtx to 1.32v make any difference?

I noticed a few people here and there have done this.

what would be the benefit?

would it be more stable? or be able to clock higher?

thanks
Reply
Reply
post #2 of 109
11/12/07 at 4:31am
Theoretically it would supply more power to the core. This would in turn allow the core to remain stable at high frequencies, essentially pushing up the level at which the core artifacts. Really you should just try it yourself and make your own conclusions. Here is the bios that I told you I would make. Check it out to see if you want to use it.

Unlocked/Core Voltage Increase

I will not be able to host this file long.
Reply
Reply
post #3 of 109
11/12/07 at 11:50am
Let us know how it goes, as I'm looking at trying this myself.
Reply
Reply
post #4 of 109
11/12/07 at 12:13pm
:::sniff sniff::: Excuse me sir, could you please stop smoking? Oh I apologize, It seems your laptop is on fire...
Reply
Reply
post #5 of 109
11/12/07 at 12:23pm
Quote:
Originally Posted by SolApathy View Post
:::sniff sniff::: Excuse me sir, could you please stop smoking? Oh I apologize, It seems your laptop is on fire...
7950GTXs run fine at that voltage with the same heat sync...

OP, i believe others have tried raising the voltage with nibitor, and it did not work, or it would not let the core go any higher. Also, flashing to a 7950 will not work, and youll have to blind flash back to the correct bios.
Reply
Reply
post #6 of 109
11/12/07 at 12:28pm
I was being sarcastic. If you read my sig, you would notice that I have a...7950GTX. THe only difference between the 7900 & 7950 is a core revision.
Reply
Reply
post #7 of 109
11/12/07 at 1:06pm
Quote:
Originally Posted by nissanztt90 View Post
7950GTXs run fine at that voltage with the same heat sync...

OP, i believe others have tried raising the voltage with nibitor, and it did not work, or it would not let the core go any higher. Also, flashing to a 7950 will not work, and youll have to blind flash back to the correct bios.
Thats why you just up the voltage in nibitor, as you stated. Flashing a card to a different cards BIOS can never be good

Quote:
Originally Posted by SolApathy View Post
I was being sarcastic. If you read my sig, you would notice that I have a...7950GTX. THe only difference between the 7900 & 7950 is a core revision.
I thought they had the same core and everything, the only difference was the 7950s were cherry picked, which in result allows for higher clock speeds. O and the BIOS just labels it as a 7950 instead of a 7900. I didn't think there were any actual core differences.
Reply
Reply
post #8 of 109
11/12/07 at 1:09pm
the core revision is a minor change that 99% of ppl don't even notice. Usually just ends up allowing a slightly higher clock. Everything about the manufacturing process is essentially the same. Same amount of transistors...etc.

a lot of the 7900's can get really close to matching the 7950's performance.
Reply
Reply
post #9 of 109
11/12/07 at 1:10pm
Ah so its not any extra features, pipelines, or shaders then. You had me scared for a moment
Reply
Reply
post #10 of 109
11/12/07 at 1:16pm
No, nothing substantial at all. Just a very minor change that allows for higher clocks.
Reply
Reply
post #11 of 109
11/12/07 at 3:36pm
About to remove file. Hope you guys had fun with it. Anyway, I'm not big into voltage anymore since adjusting it on the 6800 series pretty much failed miserably. I'll get around to tinkering with the 7 series later but I only plan on supplying less voltage to the core.
Reply
Reply
post #12 of 109
11/12/07 at 4:36pm
Thread Starter 
dang, missed it.

yousendit
yousendit

supose I have to learn how to use the nibitor hexedtior table
Reply
Reply
post #13 of 109
11/12/07 at 6:08pm
Nope. Just save your BIOS using ATItool or whatever, then open it in nibitor. Then if you look around in the program enough, you will find the settings for changing the voltages. BTW, is you card a rev. A00, or A01?
Reply
Reply
post #14 of 109
11/12/07 at 10:07pm
Well he doesnt trust the unlocked bios uploaded here (I think) and he may not know how to unlock the bios so whatever. Anyway, I'll keep it up awhile longer.
Reply
Reply
post #15 of 109
11/12/07 at 10:07pm
Thread Starter 
my card is a 01

thanks zzpulp

i was traveling on the bus all day. Just got home
when I looked earlier it wasn't hosted.

now it is and I grabbed it.

thanks again
Reply
Reply
post #16 of 109
11/12/07 at 11:21pm
My card is a A01 revision as well, so I uploaded it here and had someone unlock it for me since its not on that "unlocked BIOS" ISO.

Heres my thread. The unlocked A01 7900GTX BIOS is listed in post #12.

http://www.notebookforums.com/showth...ck+7900gtx+a01
Reply
Reply
post #17 of 109
11/12/07 at 11:37pm
Thread Starter 
i looked again and my revision a00
Reply
Reply
post #18 of 109
11/12/07 at 11:50pm
Ok, I was about to say. I could of sworn that was the original 7900GTX bios I was modding. Anyway, I will have to see if indeed that other ROM is different. Not that I dont trust you, its just that I've never heard of it.


Edit: Yep, I guess there are two different revisions. Now the question is, are they compatible with each other?
Reply
Reply
post #19 of 109
11/12/07 at 11:59pm
No they're not compatible. If you try flashing one with the BIOS for the other revision, you're gonna get a black screen that you can't get past unless you do a blind flash back to the original BIOS or the unlocked BIOS for your cards revision. To the OP, the unlocked BIOS you're looking for is for the A00 one...the only 7900GTX revision included in this ISO. http://files.filefront.com/JLMODrar/.../fileinfo.html. So if you're sure you have the A00, you can flash to the unlocked 7900GTX on that ISO with no worries.
Reply
Reply
post #20 of 109
11/13/07 at 12:06am
Thread Starter 
lololol!!! that is what happened to me with the bios that I was originally doing.

I tried a bunch of stock until I found one that worked.

zzpulp. what is the unlock hex byte adress and byte on the 7900gtx bios?

I am familiar with hex addresses and editing.
Reply
Reply
New Posts  All Forums:Forum Nav:
  Return Home
NotebookForums.com › Forums › Notebook Manufacturers › Dell Forums › Dell Home (Inspiron, XPS, Studio) › changing the 7900gtx to 1.32v