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XNorth

macrumors 6502
Feb 23, 2018
300
464
United States
It hasn't got the high speed fan issue, quite the opposite

- fan speed settles at 1500rpm when idle
- under load the speed drops
- after load it rises until temps drop and settles again at 1500 .

These are contradictory statements, no? It has no fan issue, but when idle spins at 1,500 rpm...that doesn’t sound normal.
 
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Pval

macrumors member
Jan 7, 2008
97
66
Holland
  1. 2400rpm is the default / idle speed for a Vega 56 & 64 air cooled, 1500rpm is the default / idle speed for a liquid cooled card. But you guys are both saying my fan speed is too high and I have the high fan speed problem, even though I've told you I have no problem and the fan speed is at the default? Is AMD wrong too?
  2. Are you seriously suggesting I flash my liquid cooled card with an air cooled BIOS? How can I hold you liable?
  3. I hope some moderator will clean up this thread, it's huge and rife with incorrect information.
 

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XNorth

macrumors 6502
Feb 23, 2018
300
464
United States
Are you seriously suggesting I flash my liquid cooled card with an air cooled BIOS? How can I hold you liable?

Good luck holding the Internet liable jk :)

2400 RMP is not the default idle speed for Vega 56/64 air-cooled. My Vega FE was consistently blowing over 2000 RPM and sounded like a jet no matter what. After Mojave was installed, it could idle at 600-800 with an HEVC file playing. There are Vega 56s that don't spin at all when idle.

If 1500 RPM is normal for your liquid cooled Vega and you're cool with it, then it's all cool.
 

MisterAndrew

macrumors 68030
Original poster
Sep 15, 2015
2,895
2,390
Portland, Ore.
  1. 2400rpm is the default / idle speed for a Vega 56 & 64 air cooled, 1500rpm is the default / idle speed for a liquid cooled card. But you guys are both saying my fan speed is too high and I have the high fan speed problem, even though I've told you I have no problem and the fan speed is at the default? Is AMD wrong too?
  2. Are you seriously suggesting I flash my liquid cooled card with an air cooled BIOS? How can I hold you liable?
  3. I hope some moderator will clean up this thread, it's huge and rife with incorrect information.

An air bios should be perfectly fine on the LC. The other way around however often doesn’t work because most reference air cards can’t handle the LC’s higher clocks.

I agree with XNorth that 2400 rpm is not a normal idle fan speed. For a reference card it’s about 780 rpm as shown here: https://www.tomshardware.co.uk/radeon-rx-vega-56,review-33997-23.html

The Vega cards recommended in this thread have a zero rpm idle fan speed.

What incorrect information are you referring to? If there’s something that isn’t correct in the first post and you can demonstrate what the correct info is I would be happy to change it. I’m not aware of a limit for the length of forum threads. It’s great everyone comes together to share information.
[doublepost=1552971447][/doublepost]
Any new Radeon VII driver in 10.14.4 DP6?

Someone else will have to check. I’m currently out of town.
 
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bsbeamer

macrumors 601
Sep 19, 2012
4,313
2,713
Any info about what are the Radeon Vega Pro GPUs from the new iMacs? Apple Newsroom: iMac gets a 2x performance boost

3.2GHz 6-core Intel Core i7-based 21.5-inch iMac systems with Radeon Pro Vega 20 graphics with 4GB of VRAM and 32GB of RAM
3.6GHz 8-core Intel Core i9-based 27-inch iMac systems with Radeon Pro Vega 48 graphics with 8GB VRAM and 64GB of RAM
3.6GHz quad-core Intel Core i7-based 21.5-inch iMac systems with Radeon Pro 560 graphics with 4GB VRAM and 32GB of RAM
4.2GHz quad-core Intel Core i7-based 27-inch iMac systems with Radeon Pro 580 graphics with 8GB VRAM and 64GB of RAM
 
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tsialex

Contributor
Jun 13, 2016
13,454
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3.2GHz 6-core Intel Core i7-based 21.5-inch iMac systems with Radeon Pro Vega 20 graphics with 4GB of VRAM and 32GB of RAM
3.6GHz 8-core Intel Core i9-based 27-inch iMac systems with Radeon Pro Vega 48 graphics with 8GB VRAM and 64GB of RAM
3.6GHz quad-core Intel Core i7-based 21.5-inch iMac systems with Radeon Pro 560 graphics with 4GB VRAM and 32GB of RAM
4.2GHz quad-core Intel Core i7-based 27-inch iMac systems with Radeon Pro 580 graphics with 8GB VRAM and 64GB of RAM

On a related note, this could be good news for RX 560 Mac Pro support.
 
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bsbeamer

macrumors 601
Sep 19, 2012
4,313
2,713
On a related note, this could be good news for RX 560 Mac Pro support.

Thought same thing. If those eGPU issues creep, there will be a user base with "all in ones" complaining with very legitimate gripes that can (and should) submit bug reports for. Still wish the PCIe Vega's were available with single 8-pin power for MP5,1 usage. The i9 iMac looks appealing and keep reminding myself it's an iMac.
[doublepost=1553001796][/doublepost]Radeon Pro Vega 64X 16GB now available as upgrade for iMac Pro.
 
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bsbeamer

macrumors 601
Sep 19, 2012
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Curious about the "Vega 64X"...is that equivalent to the Radeon VII reference card? Would this mean the iMac Pro will have updated AMD GPU drivers?

Potentially the design/GPU is based on this:
https://www.amd.com/en/graphics/workstations-radeon-pro-vega-frontier-edition

Still looking for verified info. Do not believe it's tied to VII based on the easy drop-in upgrade option within iMac Pro. I'm interested in the 16GB VRAM option. First Mac product to officially support 16GB VRAM?
[doublepost=1553005793][/doublepost]Only info I can find on a Vega 64X mention is from an archived page from April 2018 that references an 8GB version:
http://archive.is/Bbn2c
 

max.1974

macrumors member
Aug 30, 2018
30
9
Brazil
Hi guys, im notice that my Vega 64 GPU Gigabyte OC air cooler not need pp or any patcher for works fine...
Im have low noise and great performance with not issue. Im don't know what happens, but someone are have the same experience?
Yesterday my card was going blink and black screen suddenly...and so im remove pp settings from clover and works fine...very fine. Run LuxMark and nothing abnormal...
 

MisterAndrew

macrumors 68030
Original poster
Sep 15, 2015
2,895
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Portland, Ore.
Great news on the new iMac GPUs. Pro Vega 20 and 48 must be Vega 12 and Pro Vega 64X I would guess is Vega 20.

Edit: Looks like Pro Vega 48 is Vega 10. I think the Pro Vega 64X is Vega 10 also.
[doublepost=1553016749][/doublepost]
Curious about the "Vega 64X"...is that equivalent to the Radeon VII reference card? Would this mean the iMac Pro will have updated AMD GPU drivers? Could be good news for the MP 5,1.

Perhaps there’s a specific version of 10.14.4 for the iMac Pro that includes those drivers. It would be interesting to see if we can run that on the 5,1.
 
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LightBulbFun

macrumors 68030
Nov 17, 2013
2,900
3,195
London UK
Keep in mind thats AMD Radeon RX Vega 64X

the Apple GPUs are Radeon Pro GPUs

also one must be careful not to get Vega20 and Radeon Pro Vega 20 confused (Radeon Pro Vega 20 is Vega12 based)

I SUSPECT Vega 48 is a cut down Vega10 card but im not 100% sure
 

Pressure

macrumors 603
May 30, 2006
5,182
1,544
Denmark
Keep in mind thats AMD Radeon RX Vega 64X

the Apple GPUs are Radeon Pro GPUs

also one must be careful not to get Vega20 and Radeon Pro Vega 20 confused (Radeon Pro Vega 20 is Vega12 based)

I SUSPECT Vega 48 is a cut down Vega10 card but im not 100% sure

It would obviously fit the naming scheme (3.072 shaders) and be a great way for AMD to sell otherwise non-salvageable dies.
 
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tsialex

Contributor
Jun 13, 2016
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No Vega 20 / Radeon VII support in 10.14.4 beta 6 in case anyone is still wondering. I'm thinking it's only in a special iMac Pro build and may be that way for some time.
Apple did not yet released any special builds, so, or they release the needed drivers with 10.14.4 final, or we will see a new special build for iMac Pro in the next days.
 
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MisterAndrew

macrumors 68030
Original poster
Sep 15, 2015
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Apple did not yet release any special builds yet, so or they release the needed drivers with 10.14.4 final, or we will see a new special build for iMac Pro in the next days.

Thanks. Well, a special build they are using internally only for now. :)

Edit: Internal build for the new Mac Pro, not iMac Pro.
 
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Claywd

macrumors newbie
Nov 9, 2012
24
0
I have the Sapphire Vega 64 Limited Edition running in my MacPro 5,1 and the screen doesn't always resume from sleep. As of Mojave 12.2 I don't get the random shut down anymore but the sleeping thing is annoying... I basically have to restart my whole machine before it will work again and sometimes kill my external GPUs power supply as well. Does anyone know of a solution? Does it need a new BIOS?
 

MisterAndrew

macrumors 68030
Original poster
Sep 15, 2015
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Portland, Ore.
There is no VEGA20 in the iMac Pro. Otherwise it would have 4 stacks of HBM and 1TB/s memory bandwidth.

It does now as a new CTO option (to ship next month). It’s discussed a little further back in this thread.

Edit: Oh, I think you’re right. It looks like the 64X is Vega 10. It’ll probably be a longer wait for Vega 20 drivers.
 
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MisterAndrew

macrumors 68030
Original poster
Sep 15, 2015
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Portland, Ore.
I think it makes more sense that the iMac Pro’s 64X is Vega 10 and Apple is reserving Vega 20 for the new Mac Pro. I think we would have seen Vega 20 drivers in one of the betas if it was going in a machine this close to release.
 
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