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MP 7,1 which 6900xt cards fit in a Mac Pro 2019?
- Thread starter Matty_TypeR
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The AMD reference model fits. Be aware though it uses 3 slots, so if you install it in slot 1 it will cover slot 2, if you install it in slot 2 it will cover slots 3 and 4. As you can see not very practical. Best solution is a PCIE expander.
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The length of the card is the issue here, most brands cards are too long to fit. Yes I know, but it the OP checks Gigabyte 6900 XT length then it may give some info.
In the Gigabyte product line, the Gigabyte model fits, but the Aorus does not. I'm running a Gigabyte RX6800XT.
For the RX6900XT, this is the one to get:
www.gigabyte.com
Lou
For the RX6900XT, this is the one to get:
Radeon™ RX 6900 XT GAMING OC 16G Key Features | Graphics Card - GIGABYTE Global
Discover AORUS premium graphics cards, ft. WINDFORCE cooling, RGB lighting, PCB protection, and VR friendly features for the best gaming and VR experience!
Lou
This is the one ordered, should last a few good years, and a bargain on Ebuyer at the moment 👍In the Gigabyte product line, the Gigabyte model fits, but the Aorus does not. I'm running a Gigabyte RX6800XT.
For the RX6900XT, this is the one to get:
Radeon™ RX 6900 XT GAMING OC 16G Key Features | Graphics Card - GIGABYTE Global
Discover AORUS premium graphics cards, ft. WINDFORCE cooling, RGB lighting, PCB protection, and VR friendly features for the best gaming and VR experience!
Lou
Gigabyte 6900 XT gaming turned up today, now fitted and it fits really nicely. so first metal bench score with it. performs well.
I thought I would do a comparison on Open CL between Monterey and Win 11 and wow the drivers in OSX are way down on win 11 the new AMD drivers are so much faster. I wonder if apple update the AMD drivers or keep them as is so the M1 looks good haha.
Yes I had the same results on openCL. Apple focuses on Metal and OpenGL is neglected.
You would think Apple would allow AMD to port over to OSX a decent driver for all really, what difference does it make to apple if the AMD driver is good in openCL. The AMD driver should be the best it can be in all requirements.
Yeah, I have similar results when comparing my RX-6800XT in macOS vs Windows, it really is a shame that they seem to purposefully keep the AMD drivers slower on macOS (as you mentioned), but luckily all of my games are in Windows, and they run beautifully, so whatever 
I can't wait to see how mine will go when it gets here - I got the W6800X 32GB. I want to get back into Flight Sim again, so windows will go on it as well.
Do the cards with type-c ports behave any differently when plugged into a displayport monitor? As in, can you just consider the type-c port as a DP port (given DP is a superset and can adapt down to HDMI, but HDMI can't do the reverse). All the cards with 3x DP are too long for the 7,1.
they behave no different, the most important thing is to buy a Bi directional USB-C to display port cable. they work either way round then, no problems.
So if you're not interested in the USB function, say if you were using an adapter like this one:
Club 3D | USB Type C to DisplayPort 1.4 8K60Hz HBR3 Active Adapter
The CAC-1567 Club 3D USB Type C to DisplayPort™ 1.4 Adapter 8K60Hz provided the source supports DSC1.2 HBR3 allows you to connect any USB Type C source to DisplayPort™ display at max 8K60Hz resolution and HDR support. It works on any USB Type C host that supports DP 1.4/DP 1.2 Alt mode...
...you can just consider it a differently shaped Display Port?
Actually that brings up a question - do the cards provide USB over the link when used in a 5,1 with a type-c display?
^^^^Are you sure? With my 7,1, I originally used a Monoprice Bi-directional cable and did not get USB power to the monitor. I also lost the ability to adjust the brightness in the Monitor CP. I now use the special Belkin cable and get all functions.
Lou
Lou
I have the Sonnet and it fits fine in my 7,1:
www.sonnettech.com
I believe the Sonnet is a 2.5 slot width card. Would be nice to find one that is only a 2 slot card, but I do not think any 6900XTs are only 2 slots wide.
Sonnet AMD Radeon RX 6900 XT - SONNETTECH
Sonnet AMD Radeon RX 6900 XT graphics card and bundles for eGPU Thunderbolt expansion systems, 2019 Mac Pro, and Windows PCs.
I believe the Sonnet is a 2.5 slot width card. Would be nice to find one that is only a 2 slot card, but I do not think any 6900XTs are only 2 slots wide.
I could be wrong, but I thought I read that Dell/Alienware also released a RX 6900 XT variant that was dual-slot.I have the Sonnet and it fits fine in my 7,1:
Sonnet AMD Radeon RX 6900 XT - SONNETTECH
Sonnet AMD Radeon RX 6900 XT graphics card and bundles for eGPU Thunderbolt expansion systems, 2019 Mac Pro, and Windows PCs.
I believe the Sonnet is a 2.5 slot width card. Would be nice to find one that is only a 2 slot card, but I do not think any 6900XTs are only 2 slots wide.
I have their RX 6800 XT that is dual-slot. I believe it's the only one of this model that is 2 slot wide.
OEM AMD 6900XT works great on mine.
I removed the 580X MPX module and put this in there instead. No issues.
Of course, I am not using XDR displays etc, so haven't dealt with Thunderbolt display issues.
However, I would like to buy dual 5k Apple displays soon.
I removed the 580X MPX module and put this in there instead. No issues.
Of course, I am not using XDR displays etc, so haven't dealt with Thunderbolt display issues.
However, I would like to buy dual 5k Apple displays soon.
What Belkin cable did you get? And when you mean get all functions, did you mean you got your ability to use the USB ports on an XDR monitor?
I'm currently using a Gigabtye RX 6900 XT Gaming OC. Took out the Vega II. I'm using the StarTech DisplayPort to USB-C Bi-Directional cable. Monitor is fine, but as expected I lost the ability to use the USB-C ports at the back of the XDR Display.
Will the Belkin cable bring this function back?
^^^^Yes and it brings back the Brightness Control in the Displays CP:
www.vmallworld.com
Lou
Belkin Charge and Sync Computer Connection Cable for HUAWEI VR Glass
Adapt HUAWEI VR Glass to connect with computer. Support DisplayPort high-speed transmission. Support HUAWEI VR Glass PC mode 3K 90Hz resolution. 4.5 meters in length, enjoy immersive VR games. 2 USB-A and 1 DisplayPort connet with PC, 1 USB-C port connects with Huawei VR Glass.
www.vmallworld.com
Lou
^^^^Yes and it brings back the Brightness Control in the Displays CP:
Belkin Charge and Sync Computer Connection Cable for HUAWEI VR Glass
Adapt HUAWEI VR Glass to connect with computer. Support DisplayPort high-speed transmission. Support HUAWEI VR Glass PC mode 3K 90Hz resolution. 4.5 meters in length, enjoy immersive VR games. 2 USB-A and 1 DisplayPort connet with PC, 1 USB-C port connects with Huawei VR Glass.
Lou
Will this also work with Studio Display?
I play to buy 2 studio displays will 2 of these work for me?
Looks like the answer is YES:
forums.macrumors.com
Lou
AMD Radeon Pro W5700's USB-C Port and Pro Display XDR
Thank you very much for the info @gimarbazat . This is probably the first time this has been tried. I have RX580 and based on what @joevt is saying, I am gonna need to buy a W5700 blue card. Do you know if the cheapter RX 5700 XT work suffice? They seem to be the same card. There is one locally...
forums.macrumors.com
Lou