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CMMChris

macrumors 6502a
Oct 28, 2019
850
794
Germany (Bavaria)

Farravi

macrumors regular
Oct 9, 2019
101
14
London
I don't understand the argument here.
The RX 5700 XT kills the Vega 56 and 64 by a leap according to this GPU Benchmark test. It is considerably cheaper than Radeon VII and Vega 64LC but slightly more expensive than the blower version of Vega 64, saying that, it is 23% faster than the Vega 64 which justifies the extra £90.

Now that apple are supporting this card on Catalina, I am leaning towards the 5700 XT and will hold fire until after January by which time I'm hoping there's going to be a lot more development and progress with Catalina and the RDNA's by the adventurous amongst us as well as Apple.
 
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tsialex

Contributor
Jun 13, 2016
13,454
13,601
Not according to this benchmark, the 5700 XT thrashes the Radeon VII compute score.
This is a Windows focused benchmark. In a Mac Pro, as a compute/rendering card, even Vega 64 has better performance than a 5700XT.

Navi 10 architecture halved the thread execution wide count from 64 to 32, maybe future iterations of RDNA will be better for compute too, but for now, Vega 64 and VII are better compute cards.
 

w1z

macrumors 6502a
Aug 20, 2013
692
481
This is a Windows focused benchmark. In a Mac Pro, as a compute/rendering card, even Vega 64 has better performance than a 5700XT.

Navi 10 architecture halved the thread execution wide count from 64 to 32, maybe future iterations of RDNA will be better for compute too, but for now, Vega 64 and VII are better compute cards.

It's actually 40 compute units for 5700XT. Navi 23 based on RDNA 2 will run circles around the VII as it is rumored to have 102 CUs, Ray tracing backed by HBM memory.
 

tsialex

Contributor
Jun 13, 2016
13,454
13,601
It's actually 40 compute units for 5700XT. Navi 23 based on RDNA 2 will run circles around the VII as it is rumored to have 102 CUs, Ray tracing backed by HBM memory.
It’s not CUs, but the instruction thread wide count, VEGA can bundle 64 instructions together while Navi halved it for 32.
 

w1z

macrumors 6502a
Aug 20, 2013
692
481
It’s not CUs, but the instruction thread wide count, VEGA can bundle 64 instructions together while Navi halved it for 32.
Ahhh. I thought you were referring to CUs. Yeah, they did halve the wavefront width from 64 to 32 but they also increased the SIMD from 16 to 32 which basically means better single threaded performance as each wavefront thread has a dedicated SIMD unit.
 

skizzo

macrumors 6502
Apr 11, 2018
260
83
If you guys want to tweak your Navi10 cards on macOS check this: https://www.insanelymac.com/forum/topic/340909-tool-amd-radeon-rx-5700-xt-powerplay-table-generator/

Works the same as the one I made for Radeon VII. Everything works except overclocking the GPU. Currently working on getting this sorted out. Undervolting significantly reduces power consumption, heat and fan noise. Also gives a performance boost since it eliminates thermal throttling.

I will check this out when I have an available afternoon. sounds promising to get the same performance I have in Windows on macOS. thanks for posting this link

I cannot imagine anyone wanting to overclock the RX 5700 XT in a cMP. It's hot enough at stock clocks and voltages. overclocking is going to need a water cooled loop I think, or at least, an aggressive fan curve. Like you discovered, undervolting alone or pairing with underclocking makes a significant difference in thermals. I settled at 1875mHz at 990mV and actually overclocked vram to 1820mHz (910 on the Wattman scale).....but that is on Windows 10. I haven't made a real transition to Catalina due to my main app I use, Pro Tools, doesn't work yet still being part 32bit. So I haven't been testing the RX 5700 XT much other than to see it works, but at least now knowing it will run how I want it to in macOS (cool and quiet) this gives me a nudge. I game in Windows only so when on macOS I don't need all the performance, under clocking and under volting to the rescue!
 
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Farravi

macrumors regular
Oct 9, 2019
101
14
London
Sorry gents, I didn’t mean to cause offence, just sharing my findings.

Some of you, clearly have a better understanding of how Mac and GPU’s operate. There’s a wealth of information that a lot of you have gained and appreciate you sharing with the larger community.
 

MacRoysan

macrumors newbie
Jul 22, 2010
19
0
Sapphire Pulse Vega 56 in a Mac Pro 2010 (5,1). Xeon 3.46GHz 12 core, 64GB RAM. Mojave 10.14.4.
  • No fan top-speed issue. It turns on when it needs. Most of the time both fans are off automatically if the environment is cool (my room).
  • Just direct plug-and-play. No need any power-related modification. It just works out.
  • The card is 28cm long. It can fit into the PCI bay flawlessly. No need to remove the PCIe fans in the front.

Under LuxMark OpenCL Stress Test Full Load. Watt consumption is.
  • PCIe AUX-A = 12.3V x 6.79A = 83.5W
  • PCIe AUX-B = 12.3V x 7.99A = 98.2W
  • PCI slot = 12.3V x 1.65A = 20.2W
Max practical power consumption of Sapphire Pulse Vega 56 in my Mac Pro 2010 (5,1) = 201.9W. On AMD website, it is rated 180W.

View attachment 835211

Here is the metal score by Geekbench 4.
View attachment 835210

Here is the OpenCL score by Geekbench 4.
View attachment 835212


I'm a Final Cut Pro user. I have some findings. When export a movie using h264 coding. It can fully draw the GPU power at full loading. The Xeon CPU loading (usr) would become lower. I can tell because it draws 4A on each PCI-e AUX-A and B port. The export speed is fairly fast. However, when export a movie using h265 (HEVC) coding. Final Cut Pro wouldn't make use the GPU performance but from the Xeon CPU. I can tell because it draws less than 1A on each PCI-e AUX-A and B port. It seems that this card doesn't process h265 hardware acceleration or encoding feature by Final Cut Pro. The export time of a movie using h265 is 5 times longer than h264 in Final Cut Pro X when exporting the same length of movie clip.

To all Final Cut Pro users, be aware.
Here is a power consumption when exporting a movie by Final Cut Pro.
  • PCIe AUX-A = 12.3V x 3.68A = 45W
  • PCIe AUX-B = 12.3V x 4.6A = 57W
  • PCI slot = 12.3V x 1.65A = 20.2W
So when exporting a movie by FCPX with h264 coding. The power consumption of Sapphire Pulse Vega 56 = 122W only.

View attachment 835374


Hi!

What type of cable do you use to power your card? Have you tried connecting an adapter from, for example, HDMI or Displayport to a DVI and got a picture? I ask because I have an Apple Cinema screen that I want to use. Would be grateful for answers.

Best regards
MacRoy
 

Pressure

macrumors 603
May 30, 2006
5,179
1,544
Denmark
Hi!

What type of cable do you use to power your card? Have you tried connecting an adapter from, for example, HDMI or Displayport to a DVI and got a picture? I ask because I have an Apple Cinema screen that I want to use. Would be grateful for answers.

Best regards
MacRoy

I’ve been running two Apple Cinema Displays off a VEGA FE with two DP-to-DVI adapters.
 
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macguru9999

macrumors 6502a
Aug 9, 2006
817
387
Hi!

What type of cable do you use to power your card? Have you tried connecting an adapter from, for example, HDMI or Displayport to a DVI and got a picture? I ask because I have an Apple Cinema screen that I want to use. Would be grateful for answers.

Best regards
MacRoy
Has anyone tried the Mac Videocards Vega 56 with bootscreen yet ? Its on his website as out of stock so i guess he must have sold a couple of them ??
 

bsbeamer

macrumors 601
Sep 19, 2012
4,313
2,713
Radeon Pro W5700 should be available soon and would assume almost immediate compatibility with macOS Catalina 10.15.1+. Retail for $799 at launch.

Worth noting this GPU includes a USB-C port, which has been a gripe for some on this forum recently. This MIGHT be one of the first standard GPUs to offer this natively.

673511-radeon-pro-w5700-2.png

 
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deconstruct60

macrumors G5
Mar 10, 2009
12,493
4,053
I don't understand the argument here.
The RX 5700 XT kills the Vega 56 and 64 by a leap according to this GPU Benchmark test. It is considerably cheaper than Radeon VII and Vega 64LC but slightly more expensive than the blower version of Vega 64, saying that, it is 23% faster than the Vega 64 which justifies the extra £90.

Tuned for gaming Windows drivers versus macOS drivers ( not tweaked primarily for gaming. ) may not necessarily lead to those numbers.
 

bsbeamer

macrumors 601
Sep 19, 2012
4,313
2,713
USB-C but NOT Thunderbolt 3 right? Means no Apple 6K support or am I wrong?

If you're JUST talking about the Pro Display XDR, my understanding is the Pro Display XDR supports TB3 as "video" input only. All USB-C are for hub-style functionality.

There is discussion about a TB3 video adapter box (from AJA or Blackmagic) to make this work with other machines. The GPU would still need to drive the 6K signal and the box would just convert. Unsure how this would work with reference modes, etc. Until the monitor and converters/boxes are available, it's a guessing game.
 
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