strange grid of dots

[HHbomb]

Hello
here is a render I made with 4 titans, I get strange grid of blue dots.... any idea ?
DL render.

[HHbomb]

it is 1/24 pixel...

[Karba]

Hello
here is a render I made with 4 titans, I get strange grid of blue dots.... any idea ?
DL render.

What is you render resolution and camera FOV?

[abstrax]

Hello
here is a render I made with 4 titans, I get strange grid of blue dots.... any idea ?
DL render.

This is just a guess, but it looks as if 1 GPU causes issues. Could try one GPU only and then test each of the 4 GPUs?

[HHbomb]

thanks for reply

karba : just a 2500x1600 pixel render, but these dots appear during a long cook (16000 samples), not at the beginning.
abstrax : yes, I was thinking about this,....

[HHbomb]

It is one bad titan..... (made in china)

[gueoct]

Aren´t they all made in china?

[HHbomb]

yes...

[madcoo]

Hi there,
I never got that exact kind of problem, but have you tried playing with the RayEpsilon value?
(in the Kernel menu)
Cheers,
Madcoo

[HHbomb]

Hi madcoo, it was a hardware problem, just waiting to another card...