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VEGA 64 Displayport 1.2 Limited Monitor Output Issue

Question asked by bhuvsta85 on Jan 5, 2019

Hello all,

 

I'm having issues getting my Vega 64 to display my monitors native resolution - 2160p60. If I set my monitor to Displayport 1.1 there are no issues acheiving 2160p30. However when I set my monitor to Displayport 1.2 I get several issues depending on which driver I have installed (I've tried a selection from 17.12.1 to 18.11.12):

 

17.12.1 - Limited to 1080p60 at DP1.2 (but 2160p30 at DP1.1) with the "The System has detected a link failure....." message.

18.3.1, 18.3.4 and 18.6.1 - Limited to 1080p60 at DP1.2 (but 2160p30 at DP1.1) but NO 'link failure' message.

18.7.1 and 18.9.3 - Limited to 1080p60 at DP1.2 (but 2160p30 at DP1.1) but NO 'link failure' message. These drivers actually have 2160p60 (and many other resolutions above 1080p60) but they all result in a blank screen and the display reverts to 2160p60.

18.11.12 to latest - Get a blank screen during driver install, which I assume is the drivers defaulting to 2160p60 without falling back to 1080p60.

 

I've tried a fresh install of Windows 10 but the problem still persists. Without an AMD graphics driver installed Windows defaults to 3840 x 2160 @ 64fps which appears to work ok.

 

There were no issues when I connected my PC to a UHD TV via HDMI 2.0. The PC successfully played a few games so I can assume that it's not a power consumption/supply issue. Unfortunately my monitor is limited to HDMI 1.4.

 

I was previously using a Sapphire R9 290 Tri-X with the same hardware and that had no issues with attaining 2160p60 using DP1.2 so I don't think it is an issue with the Displayport cable I'm using. I have tried Displayport cables of different lengths and even a DP to mini-DP cable.

 

I'm assuming this points to a driver issue with DP1.2. Any suggestions?

 

Mobo: Asus B350-F Strix (Latest BIOS)

CPU: AMD Ryzen 1600 (Default Speed)

RAM: 16GB 3400 Mhz DDR4

Graphics: Sapphire Vega 64 Nitro+

Monitor: Phillips BDM4065

OS: Windows 10

PSU: EVGA G2 1kW

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