Gigabyte Gtx 970 G1 and Eizo Fg2421 240hz

[Lordpkappa]

Hi,

2 weeks ago i have updated my system with a Gtx970 G1, and from day 1 i have a strange problem with my monitor and 240hz mode.

https://www.youtube.com/watch?v=_aU1yHIw7P4

Only on cold boot. After 2-3 minutes disappears. I have tried with different cable (Diplay port, Hdmi,... ) but this carzy pixels are still here.
Also in the bios happens. If i switch form 240hz mode to 120 hz mode doesen't happens.
I have also tried to rma my first GTX 970 g1, but with the second one the problem persist.

If i put my old GTX 770 in my computer doesen't happens. So i think is a problem releated to GTX 970 Gigabyte hardware.

I ask for some suggestion and help, maybe a firmware update.

[Lordpkappa]

This tipe of artefacts all over the screen...

[Lordpkappa]

I have tried another pc and the problem is stille here, so it's not the GPU...