1080ti Screen Dropouts & White Sparkles

chrisloudon

Hi All,

I have a faily high spec PC connected to a Yamaha RX-A2060 feeding into an LG OLED65C6V that I use for both gaming and media playback.

The issues I have are 2 fold as follows:

When gaming, I frequently (but randonly) get screen dropouts. The screen goes black, then comes back, and it will do this until I either switch to another input or turn off the Yammy and back on again. The dropouts occur at 1080p, 1440p and 2160p with or without HDR. Over the past few months both my girlfriend and I have played Far Cry 4, 5 and Shadow of the Tomb Raider and its doing our nut in.

When I playback UHD content (MKV or M2TS with HEVC Main 10), very dark or black areas of the screen will sparkle with white flashes.

I have heard that the screen dropout problem is possibly due to bad HDMI ports on the LG so I have tried all 3 to no avail. Further research has pointed me to a 'handshaking' issue but I have not found a solution.

The white sparkles problem appears to be down to poor cables and a lack of bandwith but I have tried a number of different cables certified as 'premium' or '18gbs' with no improvement.

Anyhoo, before I go spending money on expensive cables I though I'd see what you guys had to offer.

P.S. SkyQ UHD, LG UP970   4k Disks and PS4 Pro don't suffer from either of the above problems and connected to the Yamaha via HDMI. PC, Amp and TV are all up to date with latest OS   updates / drivers / firmware and apart from the above issues are solid as a rock.

Thanks

Chris

EndlessWaves

White sparkles in games is typically a sign of a card that's overheating, faulty or pushed past it's limits but the video playback doesn't make much use of the main GPU.

Have you tried the integrated graphics to see if you get the same behaviour?

chrisloudon

Hi there, thanks for the reply.

The white sparkles only manifest themselves when viewing UHD movies and I've tried turning off harware acceleration with the same results.

The dropouts only occur when playing games, very strange.

CPU and GPU temps are all well within norms and like i said, PC runs buttery smooth and isn't prone to crashing or doing anything strange.

C

dollag

have you tried connecting the pc directly to the tv? likely not the avr input but process of elimination etc.

dollag

you could also stress the card in heaven and see if that creates the same issues and would likely point to the gpu. your integrated gpu can handle 4k games and media playback so would switch and see if the problem persists

ChuckMountain

Cables don't get certified as 18 gbs they are either standard, high speed or premium.

Premium cables should have a hologram of authenticity on the packaging that if can be used to double check they are pukka.  If they don't have a hologram then they are not certified.  Does yours have these?

Joe Fernand

HDMI cables - how long are your cables PC > AVR and AVR > Display? The longer the cable the more likely you are to see sparkles with a 4K UHD signal.

HDMI Dropout - HDCP and EDID 'start' with the Sink (Display) and work back through the Repeater (AVR) to the Source (PC), quiet often with a PC as the Source you can run into issues if you have an AVR in the signal path as the 'constant' handshake between the three devices can drop momentarily which then requires the Sink (TV) to reacquire the Source.

You can try altering EDID and Power settings (never go to sleep) within the PC and or use a Utility such as Monitor Asset Manager and compare what the PC is 'seeing' with the AVR in and out of circuit - EnTech Taiwan | Utilities | Monitor Asset Manager

If the PC continues to struggle via the AVR and connecting the PC Direct to the Display is not an option you can stick an EDID manager such as the HDFury 'Dr HDMI' or the New 'Dr HDMI 4K' between the PC and the AVR - that way you can guarantee the PC always stays connected to the AVR, HDFury Dr HDMI 4K – The Media Factory

Joe

KeirW

You didn't mention what psu you're using in your computer..  also check the connections to the graphics card to make sure they're connected securely.