I’m running Win 10 64 bit Pro 1709 (16299.371) fully updated
I’m connecting from a desktop PC’s R9 390 DP port (1.2) to a 4K Sony TV (55″ X900E) with a CAC-1070 adapter.
mobo: ASUS Z87 Plus
32 GB DDR3
1 OS SSD, 5 HDD’s
EVGA 750 W PSU
XFX R9 390 DD
The TV is brand new. The TV has four HDMI ports: two of them are “Enhanced Format” for full 4K 60 Hz 4:4:4 chroma.
I’m running the latest AMD Radeon version 18.3.4. Based on advice here I set a custom 3840x2160p resolution and only changed Timing Standard to CVT-Reduced Blanking. The custom rez looks like this:
I’ve tried the TV on both of it’s Enhanced Format HDMI ports and I can get 4K 60Hz 4:4:4.
What happens is that occasionally the TV will flicker. Occasionally like maybe a couple times an hour it’ll happen. The screen doesn’t go black or anything. It’s just like a quick flicker, almost like in that instant the TV is syncing out of timing or something.
I’ve tried 5 different High speed 18 Gbps capable HDMI cables now on the two Enhanced ports. I got Amazon to replace two of the cables that arrived today. Testing them I still get that occasional flicker happening. It’s most noticeable on a white screen …. like when I’m typing this now.
I was thinking today of buying yet another cable, the beefiest I could find, then buying the CAC 1080 and seeing if it’s increased bandwidth capability might make a difference.