PC Drivers & Software

[Cluffy]

Sorry to start another black screen topic but I've had no luck finding anything.

I've just built a new system with  ryzen 9 5900X, Gigabyte Aorus master MB and a 6950 XT.

I'm running a Sony TV that does a max 120 hz at 4k. When I set the refresh to 120 hz I get very frequent black screen flickering, at 100 hz it's occasional and at 60 hz it stops. 

I suspect the culprit may be a 600mm pci-e 4 riser cable I am using to connect the video card to the mb. I have heard there may be signal loss with a cable this long. 

what I should and will do is plug the card directly into the mb and see what happens.

I didn't built this system to play at 60 hz lol so I thought I would ask you guys.

[vialli100 · Accepted solution]

Are you using an old HDMI cable or did you buy a new one..

It would have to be a good quality, I had the same problem with my LG UHD disc player to my LG Oled TV..

The screen would flash black, when I upgraded the HDMI cables it stopped..

I also had the same problem when I got my old 4k monitor, I had to buy a better quality DP cable to stop the flashing black screen..

But as you pointed out, try the GPU in the slot first..

[Cluffy]

Hi,

I took your advice and tried a 4k 120 cable. Problem solved. You saved me having to rip out my video card which on my machine is not a 5 minute job.

Funny thing, I tried a few games at 60hz ultra everything and I couldn't feel and input lag. Just shows how much power the 6950

has. 120 hz is still better though.

Thankyou very much for your help.

[vialli100]

Good, I'm glad I could help..
Happy gaming..

[CRodrig57]

I used DDU complete remove and reinstall my GPU drivers and bought this DP cable https://www.amazon.com/dp/B07S3XSJL9?psc=1&ref=ppx_yo2ov_dt_b_product_details to replace the DP cable that came with my monitor and I still have random flickerings in the display. Its quite annoying. 

What kind of DP cable do you recommend? An actual premium cable but not too crazy overpriced.

[vialli100]

@CRodrigo57
These are good cables..
https://www.amazon.co.uk/KabelDirekt-DisplayPort-version-certified-supports/dp/B07HL7RXKM/ref=sr_1_5...

[CRodrig57]

I saw that exact cable online and wish I bought the one you showed instead of the monoprice. 

thanks. Im going to give it a try.