but is not so far away from a 2.0x16 PCIe slot in 5.1 cMP
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therefore in comparison with reality (barefeats) confirms again and again that benchmarks are completely worthless
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MP 7,1 Its up and running: 2x VII + 580X
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but is not so far away from a 2.0x16 PCIe slot in 5.1 cMP
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therefore in comparison with reality (barefeats) confirms again and again that benchmarks are completely worthless
Some of these ‘benchmarks’ must be taken with a grain of salt even from well meaning and reputable testers. For example I just tested my Mac Pro 16 core with a single pro vega II on the resolve candle benchmark TNR node test. This is a gpu test so cpu shouldn’t affect things. The result at bare feats for the same gpu pro vega II were 6 noise reduction nodes give 11fps. I’m getting over double this performance. With 7 nodes I get 24fps. So something is very wrong with their test here.
I'm using Metal, same as Barefeats.com, and I get over double the performance with the same card. Only difference is I have a 16 core they were using 12 core and I have a bit more RAM. However this test is specifically designed as a GPU only test so CPU/Ram should be making no difference. Their results with a single Pro Vega II are 24fps with 3 TNR noise reduction nodes, I get 24fps with 7 TNR noise reduction nodes. There is something very wrong with their test, so all displayed benchmarks on that GPU test can't be trusted unfortunately.
This is great that Mac Pro works to internally power vega II duo plus two Radeon VIIs!
does this mean the power connections behind the Vega II Duo MPX module still work to power one of the Radeon VIIs?
Sapphire Nitro+ RX 5700XT or the Pulse version would be your best bet. The downside for all 5700XT's are that I do not know of any version larger than 8GB, so the 16GB Radeon Pro 5700X Kit might be a solution once it's available from Apple.
I am curious - with the MPX RX580 in slot 3, can you connect four displays to the four Thunderbolt ports of the I/O card and Mac Pro top?
It's interesting to know that the presence of an MPX module does not disallow usage of any of the four 8 pin power connectors. But maybe other MPX modules could have different results? There's probably some kind of protection for the total current being used - maybe the computer just shuts down if there was too much current. Something smarter than that is probably unnecessary (like turning off power to the 8 pin connectors when certain MPX modules are connected).
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A GPU doesn't use much power unless it is being used for rendering or compute or display. I don't think you should remove it unless you need the slot or it causes problems or...
Does the MacPro7,1 show boot screen on the Radeon VII without the MPX RX580?
You can't connect USB-C or Thunderbolt displays to the Radeon VII (not easily anyway).
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It seems power connectors still work with vega II module installed. There must be some limit though.
Barefeats has got a vega II duo working with two Radeon VII internally...
I left the 580 in place. It uses almost no power just sitting there.
LR and PS can’t currently use multiple GPUs. Capture One does, and so do most non-Adobe products. Hopefully Adobe follows soon.
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I don’t have any TB3 displays, so I can’t test using 4 displays in that method.
Yes there is a boot screen, even with the 580X removed and only using a VII.
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I think the power supply is capable of rerouting power however is necessary between the MPX modules and the 8 pin ports. Barefeats test seemed to prove this. The Vega II Duo had to have been drawing close to the limit of the MPX module, yet they were still able to draw full power from that 8 pin (I think it’s around 250 watt limit on each 8 pin). Meaning that MPX bay + the 8 pin adjacent to that slot was well over 700 watts combined.
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Absolutely. Its raw processing is superior to Adobes in every way. And, it can utilize multiple GPUs.
Too bad he didn't have two Vega II Duos to try with the two Radeon VIIs. I don't think macOS can use more than four GPUs so the extra GPUs won't use much power.
Any type of display will work with the appropriate USB-C adapter. Some adapters make the computer think a display is connected even when no display is connected to the adapter (a cheap way to test multiple display support without having multiple displays).
There wouldn't be enough unobstructed PCIe x16 slots to run two Vega II Duos with two VIIs.
I don't have the appropriate adapters, either.
True. There's only one extra x16 slot. You would have to use an x8 slot. I don't think x8 would limit performance much. Slot 5 can take a double-wide card, but Slot 7 can't unless you remove the I/O card in slot 8. But slot 8 is only half length. So the last graphics card needs to be ITX sized, or it needs to be modded for single slot (liquid cooled). There's not a lot of room to add liquid cooling (maybe a 140 mm rad+fan above the I/O card?).There wouldn't be enough unobstructed PCIe x16 slots to run two Vega II Duos with two VIIs.
I don't have the appropriate adapters, either.