MP 1,1-5,1 Success: RX-6800XT in cMP 4,1/5,1

[Muscovite]

If you read post #1, OP installed the Gigabyte 6800XT, which clearly can fit inside the cMP.

According to the Gigabyte webpage, the card is only 286mm long, in my own experience, anything below 310mm can fit into the PCIe compartment without any issue.

And a quick search shows that this card still available on Amazon.


Which Mac?

1. Read the post, saw the pics. Gigabyte and other vendors offer several different 6800xt models. Gigabyte offers SIX. Thus the question - ‘a Gigabyte card with the 6800xt chip’ or ‘the Gigabyte card model RX6800XT 16G’.

Radeon™ RX 6800 XT | Graphics Card - GIGABYTE Global

www.gigabyte.com

Now that you’ve provided the dimensions, it’s got to be the “basic” model Radeon™ RX 6800 XT 16G. Which, sadly, isn’t in stock anywhere in Russia.

I also keep hearing about people installing 6900XTs. Or is that for 7,1s?

2. Mac Mini 2018 + Sonnettech eGFX

Thanks

 

[tsialex]

Gentlemen, could you please kindly provide the exact make/models of the 6800XT and the 6900XT, you managed to physically squeeze into your cMP 5,1s length-wise, regardless of whether it is a 3-slot and whether it requires the Pixlas mod or not. If you ended up having to leave the fan in the unlock position because of the card's length, please kindly state that also.

The only ones I see are the Dell 6800XT and the reference 6800XT's (all of which are imposible to find). I know the 6800's would fit but I was hoping to give my 2010 cMP the largest last boost it can handle.

Another question - do you think the flashing process would also work in theory if the card to be flashed were sitting in an eGPU box connected to a mac running Bootcamp Windows? Thanks

Do you know that with any NAVI GPUs you are limited to Monterey? You have to take that into account.

AFAIK no RX 6900XT fits a MacPro5,1 without serious mods, too lengthy to fit. Even with MacPro7,1 some models do not fit.

 

[mikas]

^ except the exception of a reference 6900XT that fits ok, as it's cooling case solution is same size as a 6800XT.

 

[AlexMaximus]

Gentlemen, could you please kindly provide the exact make/models of the 6800XT and the 6900XT, you managed to physically squeeze into your cMP 5,1s length-wise, regardless of whether it is a 3-slot and whether it requires the Pixlas mod or not. If you ended up having to leave the fan in the unlock position because of the card's length, please kindly state that also.

The only ones I see are the Dell 6800XT and the reference 6800XT's (all of which are imposible to find). I know the 6800's would fit but I was hoping to give my 2010 cMP the largest last boost it can handle.

Another question - do you think the flashing process would also work in theory if the card to be flashed were sitting in an eGPU box connected to a mac running Bootcamp Windows? Thanks

Regarding the 6800XT, you need to know that drivers for those cards STOP at MacOS Monteray. You will have no future support and can’t use Sonoma or Sequoa Or any future macOS systems in the future. That was the reason why I have sold my 6800xt earlier this year and fell back to my old 580.
Now in terms of future proving, there are viewer GPUs left that makes sense. However, One excellent solution is the Vega VII that is still supported. Because of this, I have purchased a new in box Radeon Pro VII workstation card (300 bucks) that will arrive this week. I would recommend to go for a gpu that will work with Sonoma, the AMD 6xxx cards are not part of that bunch.

 

[Muscovite]

Regarding the 6800XT, you need to know that drivers for those cards STOP at MacOS Monteray. You will have no future support and can’t use Sonoma or Sequoa Or any future macOS systems in the future. That was the reason why I have sold my 6800xt earlier this year and fell back to my old 580.
Now in terms of future proving, there are viewer GPUs left that makes sense. However, One excellent solution is the Vega VII that is still supported. Because of this, I have purchased a new in box Radeon Pro VII workstation card (300 bucks) that will arrive this week. I would recommend to go for a gpu that will work with Sonoma, the AMD 6xxx cards are not part of that bunch.

Do you know that with any NAVI GPUs you are limited to Monterey? You have to take that into account.

AFAIK no RX 6900XT fits a MacPro5,1 without serious mods, too lengthy to fit. Even with MacPro7,1 some models do not fit.

Ah, I was wondering about what the deal was with the Monterey only warning, like yeah I am on Catalina with the 5700XT now so I'll just keep upgrading. Thanks so much - this is a big deal! But I am a bit confused still.

I just connected the 5700XT to the Mac mini running Sequoia - shows up in the works just fine. So I guess this applies to NAVI 2 only? Or the cMP only?

Is my understanding correct, then, that
1. For MAC PRO 5,1 I can still use the 5700XT and any 6900/6800/6600 card between Catalina and Monterey.

2. But for other Intel Macs (Mac mini '18 + eGPU in my particular case) I can still use these with Sequoia? Or is NAVI 2 excluded? The comment from Tsialex (thanks, by the way) seems to state that ANY Navi is Monterey only. But the 5700XT that surely works with the Intel Mac is NAVI, no? Just NAVI 1 not NAVI 2?

Please kindly clarify.

Thank you, good people.

 

[Muscovite]

Because of this, I have purchased a new in box Radeon Pro VII workstation card (300 bucks) that will arrive this week. I would recommend to go for a gpu that will work with Sonoma, the AMD 6xxx cards are not part of that bunch.

I guess I'll just stick with the 5700XT I've had for years - from what I am reading the perf difference between the Radeon Pro VII and this card is negligible.

 

[tsialex]

NAVI GPUs drivers require AVX2 with Ventura/Sonoma/Sequoia.

So, since MacPro5,1 processors does not have support for AVX or AVX2, NAVI GPUs won't work after Monterey.

 

[Muscovite]

Thank you for clearing that up, that saved me a bundle!

Going off the topic fast, but a 6900XT is perfectly doable on a Mac [Mini 2018 + eGPU] running Sequoia and onwards, so long as the future versions support the Mac mini at all. Correct?

Thanks again for your input!

 

[tsialex]

Going off the topic fast, but a 6900XT is perfectly doable on a Mac [Mini 2018 + eGPU] running Sequoia and onwards, so long as the future versions support the Mac mini at all. Correct?

While Apple supports it and still supports eGPU with Intel CPUs.