How to lower clock speed or voltage requirements of 580 GTX

[p3taoctane]

I am having continual issues with "display driver error ... recovered from error" etc issues that have been mentioned in the past.
This causes "failed card" errors within Octane stand alone and over a period of time I can go from 6 cards rendering down to 3 on many occasions.

One of the solutions offered has been to lower the clock speed (and even the voltage required for the cards.) I have put this off even though it makes sense just because it goes against my thinking to lower the performance of a nice engine. But I realize three cards running at a slower speed is better than none at all.

So how do I do this?

I have EVGA Precision X software monitoring the cards performance.

I see GPU clock 772 (MHz) and Memory Clock 2004 (MHz)

And an adjust voltage meter that currently says 1001 mV even though the cards say GPU clock 50 MHz and Voltage 963Mv ( I am guessing that is because they are at rest.)

Should I drag the GPU clock speed and the Memory clock speed down... and what too.
If I do have plenty of power suppy should I up the 1001mV so they get more voltage under load?

What do you suggest?

Lastly should sync be on? It is not reffering to SLI is it? Cause obviously I do not have SLI hardware bridges on these cards

Thanks for any suggestions

[itou31]

hello,
I also use EVGA Precision X (Version 4) to "overclock" my 580GTX. and also to find the adjustment to avoid the "GPU failed" during rendering, by lowering voltage and speed and monitor temperature.
My 2 580GTX are not synch as I not use SLI and have fine tune each board.
1 : 1000mV, 840 Core, 2100 VRam (primary and hottest board, 8°C difference from the other board)
2 : 1000mV, 850 Core, 2150 VRam

I think this is the best way to stabilise the power for rendering.

[p3taoctane]

Thanks
Sorry for the questions but I am new to altering card settings.

Do you change all of these things in the MONITORING window?
Do you lower the voltage using the adjustment voltage tab?
Do you have SYNC ON or off?

OR do you slide the GPU clock or memory clock adjustment in the main screen?


What settings do you have that stopped the card dropping out..

GPU clock Max 1500 Min 0
GPU shader clock Max 3000 Min 0
GPU Memory Clock Max 5000 Min 0
GPU Temperature Max 100 Min 0
GPU Usage Max 100 min 0
GPU Memory usage Max 3072 Min 0
GPU voltage Max 2 Min 0
GPU Fan speed Max 100 Min 0
GPU fan tachometer Max 5000 Min 0

Thanks

[itou31]

Sorry to not detailled it, just relaunch to verify.
I prefer SYNCH OFF to optimize each board. But if you have 8 !!, that could take some time to fine tune !
I do all adjustment in the main screen. Just slide/or click and enter the value.
In the voltage button, you can adjust each board (version 4.0).
I do not touch any setting in the monitoring windows.
if all ok, just use profile to save and apply at windows restart.

[p3taoctane]

What do you adjust in the main screen GPU clock? AND Memory clock?
What is your setting?

Thanks

[FooZe]

Hi p3taoctane,

I'm no under-clocking expert but i believe you were clutching at straws, and this is your last option after updated motherboard bios, drivers etc?
I would start with just lowering the core (GPU) and memory clock by something like 10%.
I would leave the voltage as is for now.

Thanks
Chris.

[p3taoctane]

Thanks Fooze
Nor am I that's why I have put it off for so long
Yeah I did all those things a couple of times on two different motherboards... just hoping something I did would fix it.

This is my last resort. I will lower just the clock and see what happens.

Thanks

Peter

[FooZe]

Hi Peter,

I just had a thought, are you usually rendering at high res?
Have you checked the TdrDelay registry setting? (if you haven't i will give you more info).

Thanks
Chris.

[p3taoctane]

You are perceptive... yeah 70% of my stuff is often 4K print stuff and the other 30% is animation that is HD or higher.

I have not been doing much animation as Octane still has a few options that are essential for production work in animation... but it makes such a nice image that I am starting to use it more and more for ani.

I did change the TdrDelay registry setting to:

TdrDelay REG_DWORD 0x0000000a (10)
TdrLevel REG_WDWORD 0x00000003 (3)

Is this what you are referring to. If you have other ideas I am wide open to them mate.

I had done this a while ago and was still getting card drop but had not changed the speed... after changing the cock speed... SO FAR...

I am rendering out a batch animation and no cards have quit. Admittedly they are only HD which is not high res.

Many thanks for your ideas and feedback. MOST appreciated

Peter

[FooZe]

You could try increasing the delay even more. Worth a shot.

Thanks
Chris.