MP All Models AMD Radeon RX 6800 XT / 6900 XT for macOS?

[johnnymcc]

Have you tried unplugging it and seeing if Radeon Software sees what is left over?

Not yet, but I am pretty sure that's what I will have to do! It simply sucks LOL - I just want to leave it in there and let them play nicely together, but alas...

 

[diamond.g]

Not yet, but I am pretty sure that's what I will have to do! It simply sucks LOL - I just want to leave it in there and let them play nicely together, but alas...

Maybe you can disable them in device manager? See if that works before unplugging them.

 

[johnnymcc]

Maybe you can disable them in device manager? See if that works before unplugging them.

Just tried that - no luck!

 

[johnnymcc]

Hey friends - so I got an LG 38WN95C Connected to the 6900 XT via Display Port. The monitor shows up as a TV instead of a monitor. Any way to fix that?

 

[DFP1989]

Hey friends - so I got an LG 38WN95C Connected to the 6900 XT via Display Port. The monitor shows up as a TV instead of a monitor. Any way to fix that?

What's the issue you're trying to fix?

For what it's worth, my ASUS PA32UAC 4K 32-inch display shows up as a Television on my stock W5700X.

 

[johnnymcc]

What's the issue you're trying to fix?

For what it's worth, my ASUS PA32UAC 4K 32-inch display shows up as a Television on my stock W5700X.

This is what I mean. See screenshot. Via displayport, the screen scaling maxes out to 3200 x 1333

 

[flowrider]

^^^^Have you tried clicking on the scaled button while pressing the option key❓



Lou

 

[johnnymcc]

^^^^Have you tried clicking on the scaled button while pressing the option key❓

View attachment 1799583

Lou

booya - that was it! I forgot about that trick. thanks! One other question - how do I see what refresh rate i'm at on Mac? I can't seem to find it in Big Sur...

 

[johnnymcc]

booya - that was it! I forgot about that trick. thanks! One other question - how do I see what refresh rate i'm at on Mac? I can't seem to find it in Big Sur...

oh wait... I checked the box "Show low-resolution modes" and how I can see refresh rate - so weird

!

 

[flowrider]

booya - that was it! I forgot about that trick. thanks! One other question - how do I see what refresh rate i'm at on Mac? I can't seem to find it in Big Sur...

You may want to check here (sys info) also:

Lou

 

[DFP1989]

The macOS display panel is such a garbage UI. Having key options hidden behind invisible buttons and poorly-worded checkboxes is just ridiculous.

 

[johnnymcc]

The macOS display panel is such a garbage UI. Having key options hidden behind invisible buttons and poorly-worded checkboxes is just ridiculous.

Completely agree. If anything has made me want to switch to Windows, it's this crap.

 

[erichui84]

hi guys, so I am just looking at this and also did some research, it appears that the Big Sur 11.4 now have support for the 6800/6900 xt cards?

I am just doing some research for my brother and he's got a Mac Pro currently running the 580X MPX module. He is it mostly for Adobe Premier.

I don't know much about performance for these use case, but would there be a huge difference for the use case between the 6800 and 6900xt?

Also is there going to be any performance degrade if he keeps the 580X MPX module in there for the extra TB3 ports?

 

[diamond.g]

hi guys, so I am just looking at this and also did some research, it appears that the Big Sur 11.4 now have support for the 6800/6900 xt cards?

I am just doing some research for my brother and he's got a Mac Pro currently running the 580X MPX module. He is it mostly for Adobe Premier.

I don't know much about performance for these use case, but would there be a huge difference for the use case between the 6800 and 6900xt?

Also is there going to be any performance degrade if he keeps the 580X MPX module in there for the extra TB3 ports?

The 6900XT is faster than the 6800XT, but not 35% faster, which is the difference in MSRP. If the 6800XT is the same price as the 6900XT go for the 6900XT, otherwise it isn't worth it.

 

[startergo]

1700? Just for the video card? I built my MP7,1 replica for less than that...
It was not long time ago when you could buy Radeon VII for 500$ and that was considered expensive...

 

[diamond.g]

1700? Just for the video card? I built my MP7,1 replica for less than that...
It was not long time ago when you could buy Radeon VII for 500$ and that was considered expensive...

Clock for clock the Radeon 7 is probably the better buy for compute workloads.

 

[goMac]

1700? Just for the video card? I built my MP7,1 replica for less than that...
It was not long time ago when you could buy Radeon VII for 500$ and that was considered expensive...

Not a Mac Pro replica with a W6800 apparently.

Top end GPUs have been around $1000 in the last five years. Not uncommon for workstation GPUs to be double.

AMD has competed on price but not performance. The W5700 was a good price, and might have been the top-ish end for AMD, but it wasn’t top end overall.

 

[rondocap]

I’ve been heavily benchmarking various gpu setups in the Mac Pro, mostly resolve, FCP, and some octane. 8k, 12k, pro res raw, 4444XQ, the heaviest stuff I can throw at it.

1. Dual 6900XT generally the fastest in almost all cases ($3200 street price for both together)
2. Dual pro Vega ii a bit further down in 2nd ($5040 price or so)
3. Dual w5700x very close snd sometimes beats the dual vega ii surprisingly. ($1800 or so)

obviously The w5700x is the best value. the Vega ii showing its age for the price.

w6800x mpx should be the best when released too, but I’m expecting a Vega ii price at least.

 

[erichui84]

The 6900XT is faster than the 6800XT, but not 35% faster, which is the difference in MSRP. If the 6800XT is the same price as the 6900XT go for the 6900XT, otherwise it isn't worth it.

ok great will keep that in mind! thanks!

 

[johnnymcc]

I’ve been heavily benchmarking various gpu setups in the Mac Pro, mostly resolve, FCP, and some octane. 8k, 12k, pro res raw, 4444XQ, the heaviest stuff I can throw at it.

1. Dual 6900XT generally the fastest in almost all cases ($3200 street price for both together)
2. Dual pro Vega ii a bit further down in 2nd ($5040 price or so)
3. Dual w5700x very close snd sometimes beats the dual vega ii surprisingly. ($1800 or so)

obviously The w5700x is the best value. the Vega ii showing its age for the price.

w6800x mpx should be the best when released too, but I’m expecting a Vega ii price at least.

What about a 6900 XT stock + 5700 MPX?

 

[randy85]

What about a 6900 XT stock + 5700 MPX?

I'd also like to know as I might look to use the 5700 MPX to drive my Pro Display XDR and put in a 6900 XT for compute...

 

[rondocap]

I'd also like to know as I might look to use the 5700 MPX to drive my Pro Display XDR and put in a 6900 XT for compute...

Here is my Blackmagic raw GPU test - W5700x + 6900xt in Resolve does work, and you do often get most of the benefits of a 2nd gpu, but I still think having 2 of the same GPUs works better. FCP definitely needs two of the same, scales well like that. It doesn't like 2 different ones.

For other things like Octane X etc, 2nd gpu of course helps - 6900xt is strong in that app.

Keep in mind multiple GPUs, especially 2 different ones - can be very finicky in Mac Os and sometimes flat out does not work correctly or can even give you worse performance than a single GPU depending on the application, so it's a trial and error thing a lot of the time.

 

[DFP1989]

It doesn't like 2 different ones

Yep didn't even like my combo of W5700X and a Gigabyte 5700 XT.

 

[randy85]

View attachment 1803292


Here is my Blackmagic raw GPU test - W5700x + 6900xt in Resolve does work, and you do often get most of the benefits of a 2nd gpu, but I still think having 2 of the same GPUs works better. FCP definitely needs two of the same, scales well like that. It doesn't like 2 different ones.

For other things like Octane X etc, 2nd gpu of course helps - 6900xt is strong in that app.

Keep in mind multiple GPUs, especially 2 different ones - can be very finicky in Mac Os and sometimes flat out does not work correctly or can even give you worse performance than a single GPU depending on the application, so it's a trial and error thing a lot of the time.

Interesting, thank you. Yes I'm using Resolve, but it looks like sticking another W5700 XT in there is actually a decent option.

I'm mostly cutting prores with an Afterburner card, so just need a bit more juice for things like noise reduction.

 

[johnnymcc]

View attachment 1803292


Here is my Blackmagic raw GPU test - W5700x + 6900xt in Resolve does work, and you do often get most of the benefits of a 2nd gpu, but I still think having 2 of the same GPUs works better. FCP definitely needs two of the same, scales well like that. It doesn't like 2 different ones.

For other things like Octane X etc, 2nd gpu of course helps - 6900xt is strong in that app.

Keep in mind multiple GPUs, especially 2 different ones - can be very finicky in Mac Os and sometimes flat out does not work correctly or can even give you worse performance than a single GPU depending on the application, so it's a trial and error thing a lot of the time.

Does it matter if the Radeon 6900 XT is in slot 1, verses a different slot when mixing both the 5700 MPX?