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MP 7,1 I just received the w6900x MPX module and its SLOW

RyanFlynn

RyanFlynn

macrumors 6502a
Original poster
Nov 24, 2006
512
467
Los Angeles
Hey friends,

I sucked it up and spent the $6000 for the MPX module and its not performing anywhere near what I expected. The video from Max Tech shows a Geekbench 5 score of 170,692, when I test, I'm only getting 115583

My system is a 28 core Mac Pro with 384gb ram and 8tb HD if that makes a difference

Any ideas?

Ryan

Screen Shot 2021-08-24 at 3.40.08 PM.png
 
I just returned mine, not much of an improvement vs w6800x duo TBH. I got 155k in geekbench 5.4.1 which is also a lot lower. Max was using 5.3 may be there is difference. I also have a Nvidia card in slot 3, maybe there is some interference. No idea.
 
your numbers for geekbench is really off, it should be 170k+

Also…Just don’t compare it to 2 w5700x like I did in real world tests - you may be even less happy With the $4k difference As those perform very well for the price, and two of them will even beat a single w6900x in many cases.

i think the only people who will get a big bump in real world use are likely the 580x. Vega ii duo are close too, to the w6800x duo.

in 3D work it’s much better though, but not as much video.
 
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rondocap said:
your numbers for geekbench is really off, it should be 170k+

Also…Just don’t compare it to 2 w5700x like I did in real world tests - you may be even less happy With the $4k difference As those perform very well for the price, and two of them will even beat a single w6900x in many cases.

i think the only people who will get a big bump in real world use are likely the 580x. Vega ii duo are close too, to the w6800x duo.

in 3D work it’s much better though, but not as much video.
Click to expand...

My returned W6900X is also not 170k, no idea why. After comparing with the W6800X duo (I ordered both) the W6900X is a very bad deal.
 
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I am happy with my W6900x. Geekbench (metal) of 162172. Naturally, way too expensive for what you get (still no HEVC 10bit advantages*), but the card serves my fcpx workflow OK, replacing two extremely power-hungry Radeon Vega II duo modules (they stay on standby for heavy multicam work in fcpx; besides, in one 4K project export test I found that the W6900x and a VII2 worked fine together).

*I am awaiting the new Mac Mini, which can serve as a workflow-enhancer to to finally provide a desired 10bitHEVC decoding during import of my Canon files (should be rather simple via a Thunderbolt-bridge connection).

And if you have some spare time... the W6900x gives a pleasant gaming experience (much better than a W6800x duo that I returned since it was not compatible with my Vegas)

see:

https://youtu.be/JtC8oGYBtEY

 
12vLego said:
I am happy with my W6900x. Geekbench (metal) of 162172. Naturally, way too expensive for what you get (still no HEVC 10bit advantages*), but the card serves my fcpx workflow OK, replacing two extremely power-hungry Radeon Vega II duo modules (they stay on standby for heavy multicam work in fcpx; besides, in one 4K project export test I found that the W6900x and a VII2 worked fine together).

*I am awaiting the new Mac Mini, which can serve as a workflow-enhancer to to finally provide a desired 10bitHEVC decoding during import of my Canon files (should be rather simple via a Thunderbolt-bridge connection).

And if you have some spare time... the W6900x gives a pleasant gaming experience (much better than a W6800x duo that I returned since it was not compatible with my Vegas)

see:

https://youtu.be/JtC8oGYBtEY

Click to expand...

I would also suggest Nvidia A6000 at $500 cheaper. The Nvidia card looks better and better performance vs the w6900x
 
Am I understanding all these results correctly? Basically the pc non-Mac versions of these cards cost 1/4 the price and work as well or better than the apple versions?
 
They’re simply different cards being compared. These are the workstation versions. You can buy a Pro W6800 for a PC, and it will indeed be more expensive and perform worse than a 6800XT. It isn’t unique to the MPX versions.
 
ondioline said:
They’re simply different cards being compared. These are the workstation versions. You can buy a Pro W6800 for a PC, and it will indeed be more expensive and perform worse than a 6800XT. It isn’t unique to the MPX versions.
Click to expand...

Thank you. So for most people, just get the PC version and save a lot of money. My only concern with the PC version will be fan noise and if they are quiet enough.
 
^^^^Most third party cards have a dual bios switch. That switch has two positions. One is for performance and allows the fans to speed up. The other is supposed to be a quiet mode.

Note - The Reference cards do not have the switch.

Lou
 
flowrider said:
^^^^Most third party cards have a dual bios switch. That switch has two positions. One is for performance and allows the fans to speed up. The other is supposed to be a quiet mode.

Note - The Reference cards do not have the switch.

Lou
Click to expand...
Interesting. Thank you. Do you know if the bios for quiet mode still works on the 7,1 correctly?
 
^^^^I have a Gigabyte card with the switch and have it set on performance. When I place my ear at the grill I can hear faint fan noise. The sound is constant from bottom to top of the grill. Don't know if it's the mac fans or the GPU fans. From a foot away I hear nothing.

Lou
 
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flowrider said:
^^^^I have a Gigabyte card with the switch and have it set on performance. When I place my ear at the grill I can hear faint fan noise. The sound is constant from bottom to top of the grill. Don't know if it's the mac fans or the GPU fans. From a foot away I hear nothing.

Lou
Click to expand...

Thanks, is there any particular reason you chose the gigabyte card over other cards. I forget, the gigabyte card doesnt have a USBc connector if I recall?

This one?
www.newegg.com

Used - Like New: GIGABYTE Radeon RX 6900 XT GAMING OC Video Card, GV-R69XTGAMING OC-16GD - Newegg.com

Buy Used - Like New: GIGABYTE Radeon RX 6900 XT GAMING OC Video Card, GV-R69XTGAMING OC-16GD with fast shipping and top-rated customer service. Once you know, you Newegg!
www.newegg.com www.newegg.com
 
^^^^I have owned Gigabyte and Aorus cards in the past, and appreciate their engineering. I would have chosen the Aorus, but they are too big for the NcMP. But, with the current GPU situation, choosing and then finding any card is really hard. Mine came up on Amazon, at a decent price for these times, and I jumped on it. The listing didn't last long.

As far as the cable, I'm using this:

Monoprice Bidirectional USB Type-C to DisplayPort Cable - 4K@60Hz, Black, 6ft - Monoprice.com

No longer will you be limited by the direction of your cable! This Bidirectional USB-C? to DisplayPort? Cable allows you to connect your legacy DisplayPort devices to your newest USB-C enabled display
www.monoprice.com

Lou
 
Last edited:
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flowrider said:
As fas a the cable, I'm using this:

Monoprice Bidirectional USB Type-C to DisplayPort Cable - 4K@60Hz, Black, 6ft - Monoprice.com

No longer will you be limited by the direction of your cable! This Bidirectional USB-C? to DisplayPort? Cable allows you to connect your legacy DisplayPort devices to your newest USB-C enabled display
www.monoprice.com

Lou
Click to expand...

Don't suppose you know what happens if you use that cable to plug a displayport GPU into a USB-C display, that offers power on the USB-C port?
 
^^^^Actually I do - Nothing, the USB-C outputs are dead. But, if you want to power them, this cable does that:

www.vmallworld.com

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 www.vmallworld.com

I have one that I used to use and it did the job, but, for me, I like the simpler arrangement of the bidirectional cable.

Lou
 
flowrider said:
^^^^Actually I do - Nothing, the USB-C outputs are dead. But, if you want to power them, this cable does that:

Lou
Click to expand...
Ahh, so it only carries the display signal from the usb-c connection. Makes sense. I was more concerned about burning out my GPU if it was sending power down the line from the display.

I've been wondering if this is a solution to the problem of a display disconnecting from the system when the panel sleeps, because that's apparently part of the displayport spec - if its usb-c port would exhibit the same behaviour.
 
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