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Hawaii Bios Editing ( 290 / 290X / 295X2 / 390 / 390X ) - Page 175

post #1741 of 3622
Quote:
Originally Posted by rt123 View Post

It can be fixed on Lightning cards with a hardmod which allows you to raise the 0.95V rail voltage
Warning: Spoiler! (Click to show)

And I believe you already have software control of that rail voltage on Matrix cards, once you enable Ln2 mode. But don't quote me on this.


Don't know anything that would help reference/390 series user though, I am sorry.

Lol finally. Super rep for this!

I wonder hows it is possible that noone has brought this up till now smile.gif

Not even @The Stilt. Hm....

And @gupsterg and @mus1mus, good job ! + rep too
If only we could change the voltage through bios.. redface.gif
post #1742 of 3622
I have personally mentioned this mod a few times on OCN in a few threads but it never gained this much traction.

Should have brought it up here instead. doh.gif
post #1743 of 3622
Well, to be honest, not all cards exhibit the trait. My 290Xs can be subjected to higher Voltages without doing the blackscreens.

Saw a post one time on the benching thread saying this but those are LN2 crowd.

Could be great if we can have access though. thumb.gif
post #1744 of 3622
Quote:
Originally Posted by mus1mus View Post

Well, to be honest, not all cards exhibit the trait. My 290Xs can be subjected to higher Voltages without doing the blackscreens.

Saw a post one time on the benching thread saying this but those are LN2 crowd.

Could be great if we can have access though. thumb.gif

Clocks are also Important. Above 1300-1350Mhz, you are damn near guaranteed to encounter black screens, no matter what card.

Its just not common knowledge because rarely do people have WC setups that let them go that high with proper temps, or its the Ln2 crowd, which will do the mod & move on.
Edited by rt123 - 2/7/16 at 1:44pm
post #1745 of 3622
Thread Starter 
Only thing I feel bad about .....

I could have paid £8 more than the purchase price of the Vapor-X and would have had so much more ... ....

Now I shall compose myself for the investigation smile.gif .
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post #1746 of 3622
Quote:
Originally Posted by rt123 View Post

Clocks are also Important. Above 1300-1350Mhz, you are damn near guaranteed to encounter black screens, no matter what card.

Its just not common knowledge because rarely do people have WC setups that let them go that high with proper temps, or its the Ln2 crowd, which will do the mod & move on.
Yeah but what is the logic ? ...I mean, Ok I clock High, and add some volts and it corrups the digital output signal ? ...That's ...weird, How is it even connected to each other..
post #1747 of 3622
Ok, this is from 8-pack
https://forums.overclockers.co.uk/showpost.php?p=27347914&postcount=5
Quote:
Black screen is often a driver issue or too high core voltage.

There has to at all times be a direct relationship between the 0.95v Rail and the core voltage of the chip. If these are out of sync black screen. This is why all my benching cards have the 0.95v rails set at 1.25-1.35v then you can push 1.6 core volts with no black screen issue.

If your rolling back drivers make sure to clean the registry etc in safe mode before installing prev ones again

I would try roiling back to previous drivers no overclock and check your on normal bios not LN2 on that card.
post #1748 of 3622
Like 8Pack said there's a some connection between the 0.95V rail (also seen referred to as reference voltage) & Core Voltage.

Why exactly, can only be explained by an Engineer with Knowledge of the PCB. The Stilt probably knows it, dunno if he'll explain it or not.
post #1749 of 3622
Quote:
Originally Posted by rt123 View Post

Clocks are also Important. Above 1300-1350Mhz, you are damn near guaranteed to encounter black screens, no matter what card.

Its just not common knowledge because rarely do people have WC setups that let the go that high with proper temps, or its the Ln2 crowd, which will do the mod & move on.

Clocks and Voltages that are beyond what most can achieve. biggrin.gif

I don't remember blackscreening on these runs though.
http://www.overclock.net/t/1436497/official-amd-r9-290x-290-owners-club/41250_50#post_24789119

I'll recheck my mentioned cards. But TBH, I have to return one card and get it replaced for black screens at high Voltages. thumb.gif
post #1750 of 3622
Thread Starter 
@fat4l

Good info on what 8 pack uses as voltage. In the thread on KingPIN forum that mus1mus linked he has or had a Matrix card, so guessing used GPU Tweak to manipulate 0.95V rail.

I'm gonna change some ID's in my ROM plus add 2 tables I've seen Asus ROMs to have from Matrix ROM. One is picked up my AtomDis (OemInfo) then also this one.

See if this quick mod enables something more in GPUTweak.
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The Stilt Machine
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