Changing the core slowdown threshold on nvidias

[Abzstrak]

Haven't used an Nvidia in a while, now have a 6800GT that I've flashed to be an ultra.... anyways, the core slowdown temp in the drivers is 115C, which seems way to damn hot for anything in my system. The GPU seems to idle at about 55C, and goes to 71C under load.... so how can I change that slowdown temp to something reasonable like 80C-85C?

 

[Jeff7181]

Why bother? If nVidia set it to throttle down at 115, they think it'll run fine at 114... if they're not worried about it, why are you?

 

[Marsumane]

Originally posted by: Jeff7181
Why bother? If nVidia set it to throttle down at 115, they think it'll run fine at 114... if they're not worried about it, why are you?

Good point

 

[Keysplayr]

Why? Why? Why? Why? Why? Why? Why? Why?

 

[Abzstrak]

because I'm overclocking it... they thought it would run fine at 114 at 350MHz, but I have it running at 425MHz..... since its already out of specs, it skews their regressed temperature lines. Also, since it is flashed to an ultra bios it seems to be a general consensus that they added 0.1V more to the core, further pushing it out of specs.

now that I'm done explaining myself, does anyone know how to do this? It must a be registry setting somewhere, but I cant find it.

 

[DeeSlanger]

thats weird, my core throttle down is set @ 120 default...

 

[Marsumane]

Think a bit more. There must be a point in which the core will sustain damage. NV thinks its above 115, correct? So, no matter how u get there, the core still maintains the same physical properties aka it wont take damage no matter what is increasing the temp.
Its just like a cpu and having AXP's not take damage up until around 90 degrees. Now u may experiance it being unstable, but you wont burn it out. It doesnt matter if the temps raise due to a hot room, or upping the voltage, you still exeriance unstable results above a certian temp, and they still burn at 90.

 

[DAPUNISHER]

Actually the XP can take very brief spikes in the 120's centigrade, 85-95c is the operational max. The point is still valid though, the GT and Ultra use the same GPU and many even the same ram, so the design specs apply to them regardless of voltage and clockspeed differences just as it does with CPUs.

As to the question of how to change the the default temp, it may not be a reg entry, it's possible it's coded right in the forceware is it not?

 

[Marsumane]

Originally posted by: DAPUNISHER
Actually the XP can take very brief spikes in the 120's centigrade, 85-95c is the operational max. The point is still valid though, the GT and Ultra use the same GPU and many even the same ram, so the design specs apply to them regardless of voltage and clockspeed differences just as it does with CPUs.

As to the question of how to change the the default temp, it may not be a reg entry, it's possible it's coded right in the forceware is it not?

Well yes this is all true, just i didnt feel it necessary to be specific for sake of being brief in the comparison

And I think the bios has the throttle limit. I know that if you flash certian 5900xt cards w/ another bios of other 5900xt's, that the throttle changes. (i wont go into detail, ill let u fill in if u wish again tho ) Based on this, i assume that the bios would control it and not the driver detecting what vendor's pcb you are using to determine the throttle point.

 

[Jeff7181]

Originally posted by: DAPUNISHER
Actually the XP can take very brief spikes in the 120's centigrade, 85-95c is the operational max. The point is still valid though, the GT and Ultra use the same GPU and many even the same ram, so the design specs apply to them regardless of voltage and clockspeed differences just as it does with CPUs.

As to the question of how to change the the default temp, it may not be a reg entry, it's possible it's coded right in the forceware is it not?

It is in the Forcewear drivers because different driver releases change the spec.

But... overclocking or overvolting or not, I don't see any reason to change that spec. I understand the OP's explanation, I just think it's pointless.

 

[imported_mitch2891]

You can change it with a hex editor by getting a copy of your bios changing it and re-flashing it.

It is bios controlled as the GT throttles at 120 and the Ultra at 115 and it changes when you flash an GT to an Ultra

 

[imported_mitch2891]

Link

Check here for a how to.

 

[Abzstrak]

so it changed in the bios huh? cool... thanks mitch

and for those of you saying it doesn't matter GT or ultra or clock speeds, then why does Nvidia have the ultras lower?? because higher clocks and voltages have lower maximum temperatures before damage can occur