Huge Lag on UHD 4K Gaming. How to fix?

[GenieGOR]

I am currently running fallout 4 and Skyrim on my mac pro in Boot Camp. I am running via HDMI to my Sony XBR 900B. My Mac Pro is the 8-core with dual D700's in crossfire X.

The TV supports 4K DCI at 60 Hz however for some reason I think the Mac Pros HDMI only supports 30 Hz.

If I play at any other resolution 720 P, 1080 P, or 1440 P I get regular input lag that I would normally get on my PS4or Xbox one which is none. I also have the TV set the gaming mode to.

Thanks and advance for the help

 

[Mandrake4565]

I do not know much about Mac's but from reading it looks like the D700's just don't have enough power to drive 4k resolution.

 

[Lochekey]

You may want to check what driver your using as well. Those gpu's are meant for a workstation set up doing video editing or 3d modeling. Depending on the driver your running it may not work well for games.

 

[GenieGOR]

My TV supports HDMI 2.0 I verified that. However the Mac Pro supports hdmi 1.4.

Apple website says that the Mac Pro supports 4K @ 60hz via mini display port (sst).

My question now is. If u connect the display port to my tv via "mini display port to hdmi adapter" will I get the 60hz?

 

[wingman99]

What are you getting in game FPS?

 

[EarthDog]

As was said, those are workstation level cards and do not have enough horsepower for 4k gaming.. sorry.

Not sure if you will get 60hz... I think so though..try it amd report back.

 

[TheGreySpectre]

It was my understanding that so far the Nvidia 900 series GPUs are the only GPUS that currently support 4k @60Hz over HDMI. AMD's new 2016 GPUs are supposed to support it but I don't think the current ones do. That might be your issue.

 

[EarthDog]

It needs HDMI2.0 I believe... yep.