MP 7,1 Gigabyte RX 6900 XT Gaming OC GPU

[LeonPro]

So I saw this card on clearance at my local computer store which I jumped at the chance. Installed it on top of my Vega II. Utilised the Belkin AUX power cables for the Mac Pro at 8-pin x 3. Install went well.

My concern is since RX 6900 XT doesn't have USB-C/Thunderbolt connections so both of my monitors are connected to the Vega II. With that being the case, how is the 6900 XT being utilised by the OS Monterey? Does it automatically switch to the best GPU for the OS-level tasks? Or is it just sitting there useless unless a specific app can be directed to use which GPU?

I tried connecting an HDMI cable from the GPU to one of my monitors, but I just see occasional flickering for some reason. I ordered a USB-C to DisplayPort bi-directional cable from Amazon and will see if this addresses this issue.

I realise Bootcamp is an issue with third-party GPU because you have to uninstall the MPX GPU and its drivers. Both GPU are not supported. Any work-around for this and still have both under Bootcamp?

Thanks for those who navigated through this hurdle.

 

[jav6454]

Usually, the monitor works off the GPU it's connected to. So right now, everything you see is off the Vega II. You other GPU is just chilling. That's usually. I am unsure how to make OSX prioritize one over the other. I know in MacBook Pros there are apps that handle this in terms of iGPU and dGPU.

 

[jav6454]

Have you looked here:

6000XT Thread

 

[LeonPro]

Usually, the monitor works off the GPU it's connected to. So right now, everything you see is off the Vega II. You other GPU is just chilling. That's usually. I am unsure how to make OSX prioritize one over the other. I know in MacBook Pros there are apps that handle this in terms of iGPU and dGPU.

Yeah, that's what I was afraid is still the case. Surprised auto-switching isn't happening for the desktop when it's possible on the laptop.

Have you looked here:

6000XT Thread

I did. The conversation has now steered towards cMP installations. I'll ask the question there in case there are hits.

 

[Stex]

If your question is specific to gaming (as per thread title) and you are running games on Windows (very likely), then I would think that the AMD control panel/app should give you the option to select (within a multi-GPU setup) the GPU to use for certain games/apps? The NVIDIA control panel offers something like that, would be surprised if AMD does not offer the same. I don't have a multi-GPU setup nor run AMD GPUs on my Windows machine, have AMD GPU in my macOS-only cMP so don't know whether it's an available option on Windows.

 

[LeonPro]

If your question is specific to gaming (as per thread title) and you are running games on Windows (very likely), then I would think that the AMD control panel/app should give you the option to select (within a multi-GPU setup) the GPU to use for certain games/apps? The NVIDIA control panel offers something like that, would be surprised if AMD does not offer the same. I don't have a multi-GPU setup nor run AMD GPUs on my Windows machine, have AMD GPU in my macOS-only cMP so don't know whether it's an available option on Windows.

It is. The AMD Adrenaline control panel doesn't give the ability to switch. It shows everything (stats) about the two GPU including which is the primary card. It also shows the games running and corresponding stats. But no ability to dictate the GPU to utilise.

When I ran CSGO, it had a 98% utilization for the Vega II and 0% for the 6900 XT. lol

I guess just like in Mac OS, I'll have to connect the display monitors to the GPU I want to use in order to make it the primary card.

I'm running an Pro Display XDR so I'm still waiting on Amazon to deliver the USB-C to DisplayPort cables next week. Crossing my fingers that will work and still give a 6K resolution. The cables are rated up to 8K bandwidth.

 

[Matty_TypeR]

I'm running an Pro Display XDR so I'm still waiting on Amazon to deliver the USB-C to DisplayPort cables next week. Crossing my fingers that will work and still give a 6K resolution. The cables are rated up to 8K bandwidth.

Make sure you buy a bi directional DP to USB-C cable, as I found out with my Mate view screen a lot of cables are 1 way only. I needed to go display Port external Egpu to USB-C and a standard one showed no display. the startech bi directional cable does show display. was driving me nuts as to no display until I found the bi directional version.

 

[LeonPro]

Make sure you buy a bi directional DP to USB-C cable, as I found out with my Mate view screen a lot of cables are 1 way only. I needed to go display Port external Egpu to USB-C and a standard one showed no display. the startech bi directional cable does show display. was driving me nuts as to no display until I found the bi directional version.

Thanks for this. I checked my order again from Amazon and I messed up. I did read it stated REVERSIBLE and up to 8K so thought I was covered. Turns out the "reversible" is for the USB-C side. lol

Two cables going back to Amazon.

I will re-order the Starttech and make sure I'm getting the bi-directional. Cheers.