BRAVIA 49X8005C 4k 60fps

[simonm83]

Hi guys

So i have a a PC with a Geforce 980ti (hdmi 2.0 output), high speed hdmi cable to the TV, but i can only get it outputted at 30fps/30Hz (3840 x 2160).

I notice in the manual this is to be expected directly from a PC:

Corresponding PC input signal

• 3840 x 2160, 67.4 kHz/30 Hz (4K models only)

Since the hdmi inputs are hdmi 2.0 compatible, is there any way i can get this to receive at 50 or 60 fps? How about if i connect the PC through a Sony AV reciever?

(I was thinking STRDN1060 or STRDN860)

Or is this purposely hobbled as its an entry level 4k model.

Thanks

[xx4L0Mxx]

I don't have the same model as you, but my 2nd post in this thread may help as it explains how I managed 2160p@60Hz RGB 4:4:4 from my 2 GTX 970 in SLI.

https://community.sony.co.uk/t5/televisions/guide-to-gaming-on-4k-sony-android-2015-tv/td-p/2068081

Good Luck !

[simonm83]

This is great info thanks, I currently game on a 24" Dell IPS 4k monitor so know that it has the meat to run it fine

The HDMI cable i've been using is a cheapo one as you mention i always thought they were the same really, so I've ordered the cable you suggested (in 10m) and will test when it arrives tomorrow..  fingers crossed!

[simonm83]

Just an update on this, i actually already had a 5m premium cable (which sadly isnt long enough)

Connecting on port 3 was able to get 4k, 6-fps, full range.. no black screen issues etc.

I bought the 10m version of the linked cable and was able to get 4k 60fps but sadly not in full range, on the model i have i can't find the option you mentioned:

"TV settings, choose "External Inputs" and scroll to the last option which is "4k HDMI SIGNAL FORMAT". "

I dont have external inputs on mine, has this been moved on new firmware or is it just specific to your model only?

Thanks

[xx4L0Mxx]

Hi there. At least you got to 2160p@60hz, so that's good. My bravia is an Android TV one, is yours? On mine, you press the "Home" button, scroll all the way down to "settings" , click that and then scroll along to "external inputs" and enable "enhanced" under "4k signal output".

 Do you not have that setting? I was under the impression that you needed your gfx card to be plugged into HDMI 1 for RGB 4:4:4 2160p@60hz, but I can check the other 3 HDMI ports later and see if I can enable it if you want? 

[simonm83]

Thanks for the info where the setting is, i'd actually not checked there only checked in the "action menu"

I found the setting and enabled enhanced 4k, and there was a change.

In the nVidia control panel i was only able to select YCbCr420 previously, and the ouput range box was greyed out.

Since making the change on the TV i can now actually select RBG and Full range, alas when i apply the change i get black TV screen of doom, if i change it to YCbCr422 or YCbCr444 same result, picture comes back on when i put it back to 420.. i'm guessing 10m is too long for this signal?

Just to complicate matters there was a firmware update today also

Oh and regarding the inputs, it says here on the specs that only ports 2 and 3 are 4k compatible but to be honest my tests have yielded the same results on all 4 ports so not sure how accurate this is.

http://www.sony.co.uk/support/en/content/cnt-specs/KD-49X8005C/list

[xx4L0Mxx · Accepted solution]

That's exactly the problem I had too, The black screen when changing to either 4:4:4 Output in either modes.

Like I said, buying the new cable listed fixed it for me, I haven't had one black screen since I changed cable. You are probably correct that 10m is too long for the signal to work.

Another thing I forgot to mention, is that I read that the TV Picture on some TV's may have to be in "Graphics" or "Game" mode for 4:4:4 - 2160p@60Hz.

I have the KD-X558509c TV, and it makes ZERO difference what mode I put my TV in it, still works @4:4:4 on all picture modes even with HDR enabled,

Here are my settings in Nvidia Control Panel but I'm sure these are what you tried :

[les2050]

@xx4L0Mxx can i ask, i have the same tv KD-55X8509C if you look on full specs on sony website you get 

3840 x 2160/30p

3840 x 2160/24p

3840 x 2160/25p

No 3840 x 2160 / 60p so am i confuzed or this tv cant do 4k @ 60fps

Thanks 

Alex 

[xx4L0Mxx]

Yes it works perfectly at 3840x2160p@60hz. Sony's online literature is old, 4k@60fps was added in a firmware update ages ago. I have been pc gaming at this resolution for last 14 months flawlessly.

You can also create a custom resolution of 1080p@120fps. If you experience any slight artifacting at this custom resolution, switch your TV's mode to "graphics". 

[simonm83]

After all my messing around it came down to the quality of the cable, i often used to scoff at the expensive 'gold plated' hdmi cables, but at 5m long the high end one i purchased supports 4k @ 60fps wheras the cheaper ones simply give a black screen.