(SOLVED) Noticeable slow down on DAZ 4.16 IRAY render times

RobertDy

EDIT: The newest drivers  516.40 and 516.59 cause this slowdown.

I primarily use DAZ 4.16 because of the many issues that 4.20 has. Just a few days ago I noticed that the render times for Iray on 4.16 have slowed down noticeably and when rendering the same scenes with 4.20, the render times are the 'correct' ones, i.e. what the 4.16's used to be before this issue came up. This problem started to happen a few days ago after I updated my NVIDIA driver to the latest one - version 516.59, so I'm not sure if this could be caused by this update?

I have two GPUs, RTX 3090 and RTX 2080 Ti, and I disable CPU fallback. Ryzen Threadripper 3960x, 64GB RAM. So I doubt it has anything to do with a weak PC. But if there's any way to diagnose this, be it a DAZ software issue or faulty hardware, I'd really appreciate the advice.

PerttiA

Did you have problems with the older driver?

There is no quarantee that newer drivers are better than older ones.

In this case there has been a number of messages about the newest drivers causing problems with older versions of DS

RobertDy

PerttiA said:

Did you have problems with the older driver?

There is no quarantee that newer drivers are better than older ones.

In this case there has been a number of messages about the newest drivers causing problems with older versions of DS

No issues with the older driver. The reason that I updated the driver is because i got a sudden BSOD (DRIVER IRQL LESS OR NOT EQUAL - nvlddmkm.sys), which I understand from online forums is caused by driver issues. When you said there are cases of newer drivers causing problems with older DS versions, what problems are those exactly?

PerttiA

https://www.daz3d.com/forums/discussion/comment/7597171/#Comment_7597171

https://www.daz3d.com/forums/discussion/comment/7601576/#Comment_7601576

And others...

https://www.nvidia.com/Download/index.aspx

 

RobertDy

PerttiA said:

https://www.daz3d.com/forums/discussion/comment/7597171/#Comment_7597171

https://www.daz3d.com/forums/discussion/comment/7601576/#Comment_7601576

And others...

https://www.nvidia.com/Download/index.aspx

Thanks, these drivers seem to work better for 4.20. I've rolled back and indeed it was caused by the drivers. Thanks for your info!

zwalraven

Just FYI, I know this is an old thread, but I've been using 4.16 with the 512.96 driver, and someone told me they new 527.96 driver works with 4.16.
I tried it, and did some test renders on my RTX 3090ti with both drivers and I got the same speeds with 527.96 as I did with 512.96 using three seperate scenes. A small one, a medium one and a large one in terms of render times. I guess I'm just writing this in case anyone wants to try it because of the benefits you may get outside of Daz. You can always rollback, as I said I did that to test and it worked just fine.