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Grilled Cheese

macrumors member
Aug 5, 2021
64
63
I don't think Resolve or FCPX updates would change anything on performance of the 6xxx GPUs at all.
Interesting. Do you have any theories about why one w6800x duo performs almost the same as two w6800x duos in some of Rondocap’s tests? (This is not my area of expertise).
 

Morgonaut

macrumors member
Apr 5, 2020
73
39
Interesting. Do you have any theories about why one w6800x duo performs almost the same as two w6800x duos in some of Rondocap’s tests? (This is not my area of expertise).
I can't judge his tests because I don't know what is his workflow exactly. I have my production workflow tweaked to maximum with no bottleneck so I can easily compare my own results. I will release my in-depth video review today or tomorrow. I made too much tests :)
 

rondocap

macrumors 6502a
Original poster
Jun 18, 2011
542
341
I wonder. Can I install two 6900xt cards and a W5700x module on a Mac Pro at the same time? Is there enough space for 3 graphics cards?
Yes you can do 3 - I’ve even done 2 mpx modules and 1 regular gpu
 

rondocap

macrumors 6502a
Original poster
Jun 18, 2011
542
341
Interesting. Do you have any theories about why one w6800x duo performs almost the same as two w6800x duos in some of Rondocap’s tests? (This is not my area of expertise).
Something else that may happen is that with 4, the workload is spread out to each gpu, instead of maxing them out more if it were 2. So similar power 2 vs 4 but spread out On the 4.

and I do think there are software updates that can improve performance, for example FCP got an update to support multi gpu over a year ago, so it can be further refined. Also got updated with better metal and R3d raw support, all which can affect performance, Resolve too.
 
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avkills

macrumors 65816
Jun 14, 2002
1,226
1,074
Thank you so much rondocap for all the time and effort you have put it, Morgonaut I will be interested in your findings as well. I am almost certain I am going to be super happy since I have been slugging along with a 580X for the last year.
 
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deconstruct60

macrumors G5
Mar 10, 2009
12,493
4,053
The rumor is actually that the 7,1-form-factor will continue using Intel CPUs indefinitely. Which would be one way to solve the problem.

Indefinitely ? Unless this is some new rumor I haven't seen yet , that is a bit of a stretch. Apple working on configuration bump to W-3300 ( from W-3200 ) is just a "n+1" evolution.

There is not much to indicate that Apple has some 12-20 year commitment to Intel Mac Pros going into the future. I don't think Apple is going to completely dump Intel Mac Pro in less than four years. But going past 8-10 years into the future there aren't really any rumors backing that up. Apple refreshes in late 2021 can probably start the "countdown" in 2022. Add 7 or 8 years and that is probably a reasonable expectation window. ( Apple sells it "new" for at least 2 years or so and then puts it on Obsolete/Vintage 6 year countdown. ) . That is a long operational life but it isn't limitless time horizon.

The "half sized" M-series Mac Pro might have some high overlap with the current form factor, but again I think that is a stretch to cast a Half sized one as a continuation of the current one. ( "half" will probably bring substantive constraints. ) Sliding back to 3 to 4 slots would put it back closer to the older 2005-2009 form factor.


(Indefinitely meaning that Apple could change their minds later, but there is no defined transition time at present and all planned updates would be Intel.)

That is pretty unlikely. If Apple kills off Intel ( x86_64 ) over the entire rest of the Mac product line up , then some small 'corner case' Mac Pro in the less than 0.4% unit volume mac shipped space (i.e., approximately 0% ) has little chance of keeping around a full dual OS stack effort for Apple.

There is also ditto for keeping up evolutionary path for the T-series. One thing for T-series to be in 60-90% of all macs sold. The T1 went into MBP touchbars. There were not the highest volume product , but far from the lowest volume either. The T2 got dropped into well over 50% of the Mac line up by unit volume. As the M-series supersedes the need for T-series chip.... Apple is painted into a corner unless they want to backslode back to no T-series at all. ( which is pretty unlikely since M-series just doubles down on what the T-series security was bringing to Macs. ).

The T2 has some obvious problems . If this next Mac Pro update gets another T2 then that would be pretty indicative that it is a 'dead ender' product. And macOS booting without a T2 or M-series present will probably disappear 6 years or so. (when the 2019 iMac start to hit the obsolete lists. )


This "Apple has no plans" probably is closer to Apple's "Rip van Winkle" approach to the Mac Pro 2013 than some planned long term commitment to evolutionary upgrades. A plan to "do nothing" is still a plan.


Apple might choose to do slightly better than going into complete zombie mode if bump the GPUs (presuming they don't kill off their AMD partnership. ) , but unlikely going to see a Sapphire Rapids system out of Apple.
 

Casey P

macrumors member
Jan 16, 2020
43
13
Margonaut has a review of the W6800x Duo.

The big concern is the overheating of the MPX module shown at the end of the video. Has anybody else seen overheating? It could be a bad card or temperature sensor. Margonaut was finding high temperatures and high fan loads even at idle. I just ordered up the 6800 DUO so now I'm concerned.
 

rondocap

macrumors 6502a
Original poster
Jun 18, 2011
542
341
Margonaut has a review of the W6800x Duo.

The big concern is the overheating of the MPX module shown at the end of the video. Has anybody else seen overheating? It could be a bad card or temperature sensor. Margonaut was finding high temperatures and high fan loads even at idle. I just ordered up the 6800 DUO so now I'm concerned.

I just did various stress tests using all 4 W6800x GPUs, I have two W6800x Duos.

No thermal issues at all, every proximity sensor stayed within the same cool range, all was very quiet. The GPU cores are warmed up as you can see to 82c and 39c respectively, which is normal. The memory sensors were all pretty cool.

Margonaut got a bad unit, neither of mine had these thermal issues - and I did dozens and dozens of GPU tests on them this last week stressing them out to the max.
 

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deconstruct60

macrumors G5
Mar 10, 2009
12,493
4,053
More from Bare Feats:


Lou


Pro Vega II --> 4096 stream processors, 64 ROPs , and 32GB HBM vRAM.

RX 6900 XT ---> 5120 stream processor, 128 ROPs, and 16GB DDR6 ( + 25% processor count , +100% ROPs )
RX 6800 XT ----> 4608 stream processor 128 ROPs , and 16GB DDR6 ( + 13% processor count , + 100% ROPs )
Pro 6800 -----> 3840 stream processors 96 ROPs , and 32GB DDR6 ( -6% processor count , +50% ROPs )
( W6800X same count as Pro. )

Infinity Cache the same on the 6000 sereies. ( 128MB)

The 6900 XT beats the Vega by
Lightroom -18% (quicker )
Octane -35%
Blender -46%
Basemark +96% (higher frames )
GFXBench +48% (higher frames )
Warhammer +32% ( higher frames )

On most of these benchmarks is is mostly raster and/or cache more than this was computationally bound.

But is illustrative that is now eyeball deep in XDR Display connection "costs" and/or something that deeply leverages Infinity Fabric links ... not tons of tractions for the MPX modules. The non tested W6900X probably just completely fails on Performance/$ , but there probably a few wins there on the 6800 based alternatives.

Not particularly surprising as Apple probably wasn't aiming for the best gaming cards options. ( they can rely on 3rd party options for that. They don't have to be "another one". )
 

avkills

macrumors 65816
Jun 14, 2002
1,226
1,074
Anyone want to hedge a bet as to whether Intel writes OS X drivers for their "Arc" line about to be introduced? 😂
 

diamond.g

macrumors G4
Mar 20, 2007
11,438
2,665
OBX
Anyone want to hedge a bet as to whether Intel writes OS X drivers for their "Arc" line about to be introduced? 😂
Since Apple isn't using Xe in any of its mobile systems, it is unlikely Intel will write drivers for it, and of course Apple isn't going to bother.
 

Storiestold

macrumors newbie
Aug 11, 2021
15
11
I just did various stress tests using all 4 W6800x GPUs, I have two W6800x Duos.

No thermal issues at all, every proximity sensor stayed within the same cool range, all was very quiet. The GPU cores are warmed up as you can see to 82c and 39c respectively, which is normal. The memory sensors were all pretty cool.

Margonaut got a bad unit, neither of mine had these thermal issues - and I did dozens and dozens of GPU tests on them this last week stressing them out to the max.
Good. Watching her video stressed me the ____ out. Mine has been running fine lately I've been doing a lot of work in Unreal Engine 4.26 and I haven't had any issues, no fan noise or anything. I also haven't had a chance to test anything else. I'd bet this thing will run even better on MacOS Monterey.
 

strangerthanlight

macrumors member
Mar 17, 2021
68
37
Just installed the 6800X Duo and similar observation to Margonaut's result. The exact same GPU proximity 6 shows very high temp even at idle (below chart seen from TG Pro, computer at idle). From iStat GPU 1 die and GPU 2 die is normal (same as Classical Technology's result).

Running some simple benchmarks cause the GPU Proximity 6 over 85c quickly

I will be returning the card for W6900X instead...

Screen Shot 2021-08-17 at 7.27.14 PM.png
 
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Storiestold

macrumors newbie
Aug 11, 2021
15
11
Same results. Damn it. It's got to be a bug. I'm hoping there's a fix coming soon.
 

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strangerthanlight

macrumors member
Mar 17, 2021
68
37
That’s interesting - what apps do you have running or in the background? Has not affected me with the duos
Tonight watching netflix and GPU proximity keeps going above 90C with frequent alerts from TG Pro...
Either the 6800X duo overheats or something wrong with the sensor/monitor.
 

JD@OBL

macrumors newbie
Oct 27, 2020
6
4
My w6800x duo arrives shortly, if I were to buy a second one..

a) where would I get the infinity fabric plate or do you buy the two w6800x duos at same time and it ships assembled as two mpx modules?

b) using FCPX - the tests Max did on YT showed for video exporting, the w6800x duo was about the same speed and I believe even slower than the Vega II duo at one point in exporting.

That alone made me ponder returning before it has even arrived.

With two duo w6800x cards.. is there a massive export time difference in fcpx?

thanks man!
 

JD@OBL

macrumors newbie
Oct 27, 2020
6
4
That is reasonable. I wonder how much improvement future drivers and software optimizations will bring to these gpus though, they don’t seem to be a huge improvement in video work yet.

for 3D it’s a more noticeable improvement. no one seems to have a W6900X yet, so I’m curious what two of those can do, but likely measured gains vs the 6800 for a huge price increase
Max on YT posted a vid with his w6900x today or yesterday I think.
 

Grilled Cheese

macrumors member
Aug 5, 2021
64
63
I would really like to better understand what kinds of processes utilise GPU more than CPU (and vice versa) in video editing programs like Final Cut Pro. For example, exporting vs background rendering of effects vs scrubbing etc. I’d be grateful for any information / advice.
 

rondocap

macrumors 6502a
Original poster
Jun 18, 2011
542
341
My w6800x duo arrives shortly, if I were to buy a second one..

a) where would I get the infinity fabric plate or do you buy the two w6800x duos at same time and it ships assembled as two mpx modules?

b) using FCPX - the tests Max did on YT showed for video exporting, the w6800x duo was about the same speed and I believe even slower than the Vega II duo at one point in exporting.

That alone made me ponder returning before it has even arrived.

With two duo w6800x cards.. is there a massive export time difference in fcpx?

thanks man!
Look back a few pages and I posted benchmarks with all four GPUs in final cut. Not a big difference, but it certainly was faster with something like red raw

two duos don’t scale that well in fcp or even resolve at this point, so 2 gpus are the sweet spot
 
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