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3850 Vmod - bios softmod

Poll Results: Does the guide linked below seem plausible?

 
  • 50% (1)
    Yes, I have even tried it
  • 50% (1)
    It looks ok even tho I didn't try it
  • 0% (0)
    It is a hoax
2 Total Votes  
post #1 of 10
Thread Starter 
Hey guys,

I was wondering if anyone has tried to make up the Vcore of the HD3850 trough a softmod? (link to guide here) I've seen a guide saying it can be done by modifying the Vcore value in the BIOS, and on a serbian forum a guy has posted an unlocked bios that suplies 1.35V to the GPU (link here).

Did you try any softmod for your 3850 or 3870 for that matter? I guess if it works for the 3850 it works for the 3870 and viceversa.

Thanks for reading and reps for helpers as usual. There is also a pool: vote if the guide linked HERE seems plausible.

D.
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post #2 of 10
Thread Starter 
bump
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post #3 of 10
Edit, Didn't notice you added the TechPowerup forum link in your original post

I don't see why you wouldn't be able to soft-mod the voltage through BIOS settings. As for if it can be pushed that far, that's a good question
Edited by ignite - 7/3/08 at 10:45am
post #4 of 10
Wont the card die at that volt
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post #5 of 10
did not use RBE but this one.
many 3850 users could up the vcore using bios mod,but it was not possible on 3870.
i flashed my card several times with a modded bios using the above editor but it did not increase the stable core clocks since it was already at the maximum voltage possible,it should work fine on your 3850 though.
    
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post #6 of 10
Thread Starter 
Thanks guys for the replies, at one time it looked like no one would answer.



Quote:
Originally Posted by ignite View Post
Edit, Didn't notice you added the TechPowerup forum link in your original post

I don't see why you wouldn't be able to soft-mod the voltage through BIOS settings. As for if it can be pushed that far, that's a good question
I've installed an Accelero S1 and the temps dropped from 90°C under load to 35-37°C, the GPU was up to 770MHz no sweat, but for more it seems to need some Vcore, at least that's my guess.

BTW, 37°C load in passive mode. I also have a turbo-module, but I felt there's absolutely no reason to put it on.


Quote:
Originally Posted by HazZ View Post
Wont the card die at that volt
You may be right, I will up the Vcore in smaller steps. Since it's on 55nm, 1.35V should be the maximum maximum, I would be happy @850MHz and 1.325V.

Quote:
Originally Posted by gamervivek View Post
did not use RBE but this one.
many 3850 users could up the vcore using bios mod,but it was not possible on 3870.
i flashed my card several times with a modded bios using the above editor but it did not increase the stable core clocks since it was already at the maximum voltage possible,it should work fine on your 3850 though.
Thanks for the link, looks like there are ways. I was intrigued as to how did ATI make the Vmod so easy to make, back in the days of the X800, X1900 to Vmod you needed to weld rezisors, shunt overcurrent fuses and stuff like this. If there's more than one soft that can make it, it seems like ATI made it easier for OCers to push their cards.
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post #7 of 10
Resurrecting an old thread, yes the bios voltage mod works and you can max your core out to 850 + however your peak will be around 870, no matter how much ram speed tweaking.
So far with 1.327 I've manage to get my 3850 gaming stable (cod4, crysis etc) at 860 1000 with qimonda ram rated at 1.0ns.
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post #8 of 10
Thread Starter 
Quote:
Originally Posted by DeadSkull View Post
Resurrecting an old thread, yes the bios voltage mod works and you can max your core out to 850 + however your peak will be around 870, no matter how much ram speed tweaking.
So far with 1.327 I've manage to get my 3850 gaming stable (cod4, crysis etc) at 860 1000 with qimonda ram rated at 1.0ns.
Wow, I'll definitely try it then. I'm at 740MHz now totally stable, more than that and it seems like it would need more juice.
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post #9 of 10
Yea go for it, overall 25% boost to the core really adds up to your min and avg fps in games. So far I've tested 850/1000 in COD4 "bog" level maxed at 1280x1024 with cpu at 2.85 and my avg was 42 some fps which put it ahead of 3870 and 2900 XT.
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post #10 of 10
you guys ever have trouble with your 3850's? please read my thread.. im in the **** with mine
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