Nvidia eGPU MBP TB3 port underperformance: 16xxMiB/s instead of 22xxMiB/s under macOS or Windows+apple_set_os.efi  

Page 1 / 2 Next
 

nando4
(@nando4)
Noble Member Admin
Joined:1 year  ago
Posts: 1678
October 25, 2017 5:04 am  


TB3 System

 

CUDA-Z H2D bandwidth MiB/s

Source

 

 macOSmacOS, hotplugged at bootWindows via apple_set_os.efiWindows, no apple_set_os.efi
      
13" MBP (2017)16xx-16xx22xxlexine
13" MBP (2016)-22xx (not verified)-22xxSmackintosh
13" MBP (2016)16xx-16xx-goalque
15" MBP (2016)---22xxVOD
15" MBP (2017)16xx--22xx Max Pham
15" MBP (2017)--16xx22xxchaosmage
      

We encounter yet another TB3 performance quirk which I bring to the attention of our Macbook eGPU community and Apple. We see 2016 or newer 13" and 15" TB3 Macbooks with Nvidia eGPUs whose CUDA-Z H2D performance maxes out at 16xxMiB/s (13.42Gbps).

  • 13.42Gbps is notably lower than the 22Gbps PCIe bandwidth specced by Intel for Thunderbolt 3.
  • AMD eGPUs are not affected (ref: goalque).

 

This occurs when these systems are used with:

  • macOS
  • Windows but booted as a fake macOS using apple_set_os.efi

 

Here is an example of an affected Windows booted via apple_set_os.efi from here:

Posted by: lexine

It seems that I am getting some H2D bandwidth degradation when I am using the apple_set_os.eif instead of hot-plugging at Windows boot logo.

Host to Device – apple_set_os.efi:Host to Device – hot-plug at Windows boot:

 

So affected users can consider a way to bypass apple_set_os.efi when booting Windows:

 

  • 2016 15″ MBPs with a DSDT override can have error 12 solved without apple_set_os.efi, but would require an external LCD as wouldn’t get an active iGPU. The boot process there avoids needing gpu-switch too. 2017+ 15″ MBPs have a factory ‘large memory’ so do not need a DSDT override to achieve it as explained.

 

macOS and Windows+apple_set_os.efi  both have underperformance

 

We can use the TB3 bandwidth recorded at the Interface Performance Reference Table as a standard.

Under macOS, I have not see any 32Gbps-TB3 CUDA-Z results in the 22xxMiB/s range. They have always been in the 16xxMiB/s or lower range, matching what this apple_set_os.efi Windows boot report tells us. 

 

Seeking a refund may see Apple fix this problem

 

Requests for partial or full refunds from Apple for underperformance may see Apple fix this in a timely manner.

Why? Their TB3 ports are only delivering 16xxMiB/s (13.42Gbps) H2D bandwidth to Nvidia cards and is not coming close to the  22Gbps PCIe bandwidth specced by Intel when being used under macOS. You can prove this by running CUDA-Z on your eGPU or attaching fast external TB3 SSD storage and benchmarking it. In either case, the very important host-to-device (memory write) result will peak at 16xxMiB/s.

Edited: 4 months  ago

eGPU Port Bandwidth Reference TableeGPU Setup 1.35


ICULikeMac, lexine, goalque and 1 people liked
ReplyQuote
Antharsious
(@antharsious)
Trusted Member
Joined:1 year  ago
Posts: 94
October 25, 2017 9:23 am  

These are interesting news. 

My question is: Is this related to the half-bandwidth issue caused by the TI83 version observed with thunderbolt3 enclosures? I also use apple_set_os.efi in my setup but with a thunderbolt 2 connection and an Akitio Thunder 2. apple_set_os.efi is a must for me because my MBP is equipped with a dGPU. I didn't notice any performance impact in my benchmarks however (25% bandwidth loss would bring me close to the bandwidth of the thunderbolt 1 interface), but this might be difficult to affirm.

Using apple_set_os.efi with my Akitio Thunder 2 apparently...

Edited: 7 months  ago

2014 15" Macbook Pro GT750M + GTX1060@16Gbps-TB2 (AKiTiO Thunder2) + Win10

Impact of Turboboost on performances and fan noise level (MacBook Pro)


ReplyQuote
yifanlu
(@yifanlu)
Eminent Member
Joined:7 months  ago
Posts: 41
October 27, 2017 6:01 am  

While I don't have windows installed on my internal drive (so I can't test hot plugging). I can compare cudaz on OSX vs cudaz on windows from my modified clover (which does apple_set_os.efi). Both are on the "slower" port of my 2016 13" MBP (upper right port).

NVIDIAEGPUSupport - Nvidia eGPU support for macOS High Sierra
Clover-DSDT+apple_set_os.efi - Macbook Pro Windows error 12 & iGPU fixed Bootloader
---
late-2016 13" MacBook Pro Touchbar + GTX1060@16Gbps-TB3 (HP OMEN Accelerator) + macOS10.13 & Win10


ReplyQuote
nando4
(@nando4)
Noble Member Admin
Joined:1 year  ago
Posts: 1678
October 27, 2017 6:10 am  

@ yifanlu, can you maneuover your enclosure such that can do CUDA-Z benchmark with the faster ports?  Then would be useful to have three CUDA-Z results:  using macOS,  Windows via apple_set_os.efi and Windows (hotplugged).

I’m guestimating that Apple too may be reserving bandwidth for phantom USB devices, just as we saw with the Mantiz Venus static allocation of bandwidth. This should not affect TB2 users but you never know. Thunderbolt bandwidth has been full of surprises.

Edited: 7 months  ago

eGPU Port Bandwidth Reference TableeGPU Setup 1.35


ReplyQuote
yifanlu
(@yifanlu)
Eminent Member
Joined:7 months  ago
Posts: 41
October 27, 2017 6:25 am  

Very interesting. Host to device showed a slight increase as expected but device to host doubled! Unfortunately though that doesn't necessarily mean FPS will double because it doesn't matter how much data can be sent "back" if the amount of data to process is constrained.

Anyone know how CUDA-Z does these measurements? Could it be possible that using apple_set_os.efi then the egpu drives the internal display but hot plugging doesn't do that?

 

NVIDIAEGPUSupport - Nvidia eGPU support for macOS High Sierra
Clover-DSDT+apple_set_os.efi - Macbook Pro Windows error 12 & iGPU fixed Bootloader
---
late-2016 13" MacBook Pro Touchbar + GTX1060@16Gbps-TB3 (HP OMEN Accelerator) + macOS10.13 & Win10


ReplyQuote
yifanlu
(@yifanlu)
Eminent Member
Joined:7 months  ago
Posts: 41
October 27, 2017 6:36 am  

I just remembered something. When I ran overwatch without turning off the internal display, I would get only 45FPS instead of 60. If the iGPU were driving the internal display, that will not be the case, right? Can people test the haven benchmark with hot plugging vs. apple_set_boot.efi crossed with internal display turned off vs internal display turned on? Four configurations. 

NVIDIAEGPUSupport - Nvidia eGPU support for macOS High Sierra
Clover-DSDT+apple_set_os.efi - Macbook Pro Windows error 12 & iGPU fixed Bootloader
---
late-2016 13" MacBook Pro Touchbar + GTX1060@16Gbps-TB3 (HP OMEN Accelerator) + macOS10.13 & Win10


ReplyQuote
darksel
(@darksel)
New Member
Joined:7 months  ago
Posts: 1
October 27, 2017 12:44 pm  

Running into the same issues as everybody here. I have a 15" 2016 MBP with the Aorus Gaming Box running with the internal display with the apple_set_os.efi workaround. 

The performance degradation is quite noticeable. Battlefield 1 dips down to ~50 FPS occasionally at 1920x1200 Ultra. 


ReplyQuote
nmzik
(@nmzik)
Eminent Member
Joined:1 year  ago
Posts: 20
October 27, 2017 2:17 pm  

No performance degradation on TB2 Macbook Pro 15 Late 2013. Tested on external monitor.

Enclosure: Akitio Node fw 23.1

GPU: Radeon Rx 580

booting via apple_set_os.efi

apple set

 booting without apple_set_os.efi

no apple

Edited: 7 months  ago

MacBook Pro Late 2013 15" MacBook Pro GT750M + Sapphire Pulse RX580@16Gbps-TB2>TB3 (AKiTiO Node)


ReplyQuote
vn1minh
(@vn1minh)
New Member
Joined:7 months  ago
Posts: 3
October 27, 2017 4:09 pm  

I actually see the same performance issue where

Macbook Pro 15 2017: CUDA-Z shows HtD as 16xx Mib/s and DtH as 26xx Mib/s where as

Windows in Bootcamp: CUDA-Z shows HtD as 22xx Mib/s and DtH as 26xx Mib/s


ReplyQuote
mac_editor
(@mac_editor)
Prominent Member Moderator
Joined:1 year  ago
Posts: 816
October 29, 2017 1:52 am  

Was this an issue that was introduced recently, or was just discovered now? I'm out of the loop with TB3 (damn :o)..

Edited: 7 months  ago

purge-wrangler.shpurge-nvda.sh

Guides:
Mid-2014 15" MacBook Pro GT750M + RX480@16Gbps-TB2 (AKiTiO Node via TB3->TB2 adapter) + macOS & Win10
Mid-2014 15" MacBook Pro GT750M + GTX980Ti@16Gbps-TB2 (AKiTiO Node via TB3->TB2 adapter) + macOS


ReplyQuote
nando4
(@nando4)
Noble Member Admin
Joined:1 year  ago
Posts: 1678
October 29, 2017 3:39 am  

@mac_editor, @lexine reported the issue on Oct-6, which was then confirmed by several other users. 

I had noticed lowered macOS H2D values but it was @lexine that identified a Windows boot via apple_set_os.efi (fake macOS boot) caused the same underperformance. Hence a macOS boot is altering some TB3 parameters that a native Windows boot isn't doing.

eGPU Port Bandwidth Reference TableeGPU Setup 1.35


ReplyQuote
Hector66
(@hector66)
Eminent Member
Joined:1 year  ago
Posts: 21
October 31, 2017 6:30 pm  

This may not be the same as a graphics-oriented benchmark, but I'm getting close theoretical maximum throughput from a 32Gb Fibre Channel HBA in a Akitio Node connected by TB3 to a 2017 MBP 15 inch.

Screen Shot 2017 10 06 at 3.46.54 PM

Edited: 7 months  ago

MBP 15" - Mid 2017
Akitio Node
MSI GeForce GTX1060 6GB


ReplyQuote
goalque
(@goalque)
Prominent Member Admin
Joined:1 year  ago
Posts: 882

ReplyQuote
nando4
(@nando4)
Noble Member Admin
Joined:1 year  ago
Posts: 1678
November 1, 2017 7:09 am  

@goalque, interesting findings there for sure. Given that the CUDA-Z bandwidth issue occurs under macOS or Windows+apple_set_os.efi, this is then not a Nvidia driver issue. Certainly not since a Windows boot without apple_set_os.efi gives full H2D performance.

It looks like Apple are downgrading the TB3 link performance when doing a macOS boot if they detect a NVidia eGPU attached but not when an AMD eGPU is attached.  Why and will Apple fix this?

Affected users can simply do chargebacks on their  Macbook purchase based on their TB3 ports underperforming when Nvidia eGPUs as outlined in the opening post. Pushback that may see Apple sort out their Nvidia issues.

Edited: 7 months  ago

eGPU Port Bandwidth Reference TableeGPU Setup 1.35


ReplyQuote
goalque
(@goalque)
Prominent Member Admin
Joined:1 year  ago
Posts: 882
November 1, 2017 8:21 am  

@nando4: very possible that this has something to do with Apple's macOS 10.13 Thunderbolt drivers when there is an Nvidia eGPU attached. If normal clpeak readings on Linux, then definitely.

I trust clpeak because its source code is platform independent and I got a bit better bandwidth with a shorter 0.5m cable, compared to 1m cable. Those linked results are conducted with the Belkin 40Gbps 0.5m cable.

automate-eGPU.shapple_set_os.efi
--
late-2016 13" Macbook Pro nTB + Vega64@32Gbps-TB3 (Netstor HL23T) + macOS & Win10
late-2016 13" Macbook Pro nTB + GTX980/RX580@32Gbps-TB3 (Netstor HL23T) + macOS10.13 & Win10


ReplyQuote
nando4
(@nando4)
Noble Member Admin
Joined:1 year  ago
Posts: 1678
November 1, 2017 8:53 am  

@goalque, given macOS or Win+apple_set_os.efi (fake macOS) boot see equally diminished CUDA-Z NVidia TB3 eGPU performance, wouldn't this point to Apple firmware. the constant in both boots, being responsible for downgrading the TB3 link? Put in another way, the macOS Thunderbolt drivers are not affecting Windows Thunderbolt performance.

eGPU Port Bandwidth Reference TableeGPU Setup 1.35


ReplyQuote
goalque
(@goalque)
Prominent Member Admin
Joined:1 year  ago
Posts: 882

ReplyQuote
lexine
(@lexine)
Eminent Member
Joined:8 months  ago
Posts: 28
November 1, 2017 9:54 am  
Posted by: nando4

Affected users can simply do chargebacks on their  Macbook purchase based on their TB3 ports underperforming when Nvidia eGPUs as outlined in the opening post. Pushback that may see Apple sort out their Nvidia issues.

hey, can you please share more details how to request the chargeback ? I will give it try, but here we don't have any apple shops just a premier resellers, and I am sure no-one there would understand the issue.... 

2017 13" MacBook Pro TouchBar + GTX1070@32Gbps-TB3 (Aorus Gaming Box) + macOS10.13 & Win10


ReplyQuote
goalque
(@goalque)
Prominent Member Admin
Joined:1 year  ago
Posts: 882
November 1, 2017 1:36 pm  

"Anyone know how CUDA-Z does these measurements?"

@yifanlu: This article explains it well:

https://devblogs.nvidia.com/parallelforall/how-optimize-data-transfers-cuda-cc/

I would like to implement something similar with Metal but timestamp information is not available in macOS SDK:

https://developer.apple.com/documentation/metal/mtlcommandbuffer/1640027-kernelendtime

Edited: 7 months  ago

automate-eGPU.shapple_set_os.efi
--
late-2016 13" Macbook Pro nTB + Vega64@32Gbps-TB3 (Netstor HL23T) + macOS & Win10
late-2016 13" Macbook Pro nTB + GTX980/RX580@32Gbps-TB3 (Netstor HL23T) + macOS10.13 & Win10


theitsage liked
ReplyQuote
nando4
(@nando4)
Noble Member Admin
Joined:1 year  ago
Posts: 1678
November 2, 2017 12:04 pm  

@goalque, lexine observed on a 13" MBP the 22xx->16xxMiB/s performance degradation when using apple_set_os.efi.  Can you confirm this only occurs on a 13" and not 15" MBP? Do AMD cards also see a performance degradation on the same platform where Nvidia cards are affected?

Edited: 7 months  ago

eGPU Port Bandwidth Reference TableeGPU Setup 1.35


ReplyQuote
theitsage
(@itsage)
Noble Member Admin
Joined:1 year  ago
Posts: 2373
November 2, 2017 12:16 pm  

Hi @nando4, this may be an isolated issue or firmware-related. I looked through my implementations and found evidences of both 13" MBP and 15" MBP showing 22XXMiB/s when using apple_set_os.efi. 

Best ultrabooks for eGPU use

eGPU enclosure buying guide

51 external GPU build guides


nando4 liked
ReplyQuote
lexine
(@lexine)
Eminent Member
Joined:8 months  ago
Posts: 28
November 2, 2017 1:51 pm  

I will do some tests during the weekend, as I need to install the windows again ...

Anyway maybe the issue is related to specific egpu firmware, as I have aorus box, and it has the USB hub, I read somewhere that there are multiple modes how the bandwith is allocated to it ? Like egpu mode with 20xx or some hub mode with 16xxMIB/s ...

Anyway the issue still persist in MacOS for NVIDIA cards ...

2017 13" MacBook Pro TouchBar + GTX1070@32Gbps-TB3 (Aorus Gaming Box) + macOS10.13 & Win10


nando4 liked
ReplyQuote
goalque
(@goalque)
Prominent Member Admin
Joined:1 year  ago
Posts: 882
November 2, 2017 11:40 pm  

Host system:

- 2016 13" MBP (non-touch) + Belkin 0.5m 40Gbps TB3 cable

Software & firmware:
- macOS 10.13 [17A405], Boot ROM Version: MBP131.0212.B00, SMC Version: 2.36f97
- Windows 10 [10.0.16299.19], Apple Software Update for Windows 10, version 6.1

Tested eGPU enclosures:

- Netstor HL23T (latest factory firmware)
- Akitio Node (Version: B1-25+4.3.3 - Improved "Host to Device" memory copy speed)

Tested GPUs:

- Gigabyte GTX 980 (reference)
- Gigabyte RX Vega 64

GTX 980RX Vega 64

Back to the starting square. As if Apple's firmware update reduces Nvidia's H2D performance back to the 16XX level, both in CUDA and OpenCL, regardless of the operating system, regardless of the eGPU enclosure. I can't hot-plug Nvidia. I've always booted with apple_set_os.efi. AMD cards are not affected.

automate-eGPU.shapple_set_os.efi
--
late-2016 13" Macbook Pro nTB + Vega64@32Gbps-TB3 (Netstor HL23T) + macOS & Win10
late-2016 13" Macbook Pro nTB + GTX980/RX580@32Gbps-TB3 (Netstor HL23T) + macOS10.13 & Win10


ReplyQuote
nando4
(@nando4)
Noble Member Admin
Joined:1 year  ago
Posts: 1678
November 3, 2017 2:39 am  
Posted by: goalque

Host system:

- 2016 13" MBP (non-touch) + Belkin 0.5m 40Gbps TB3 cable

...

Back to the starting square. As if Apple's firmware update reduces Nvidia's H2D performance back to the 16XX level, both in CUDA and OpenCL, regardless of the operating system, regardless of the eGPU enclosure. I can't hot-plug Nvidia. I've always booted with apple_set_os.efi. AMD cards are not affected.

 

So a confirmation of lexine's observations. Did a firmware update do this or did your 2016 13" MBP always have 16xxMiB/s H2D in macOS or Windows+apple_set_os.efi? Any comments on 2016 15" MBP behaviour when booted in this same way?

eGPU Port Bandwidth Reference TableeGPU Setup 1.35


ReplyQuote
goalque
(@goalque)
Prominent Member Admin
Joined:1 year  ago
Posts: 882
November 3, 2017 6:50 am  

@nando4: Not always as you can see from my previous CUDA-Z Win10 screenshots (2016 13" MBP). I did a fresh Win10 installation, after upgraded to macOS 10.13. I have always used apple_set_os.efi USB boot method. I don't have 2016 15", cannot comment.

I also tried out different TB3 cables and ports, but can't get 2XXX H2D readings anymore with the GTX 980 on Win10. It was 16XX on previous macOS builds but now the same on Windows. Windows version or the new MBP firmware along with macOS 10.13 is very likely reason.

automate-eGPU.shapple_set_os.efi
--
late-2016 13" Macbook Pro nTB + Vega64@32Gbps-TB3 (Netstor HL23T) + macOS & Win10
late-2016 13" Macbook Pro nTB + GTX980/RX580@32Gbps-TB3 (Netstor HL23T) + macOS10.13 & Win10


nando4 liked
ReplyQuote
lexine
(@lexine)
Eminent Member
Joined:8 months  ago
Posts: 28
November 9, 2017 7:23 am  

So I have done some tests and I can confirm that when booting the Windows with apple_set_os.efi I will always get 16XX H2D performance ... When I do the hotplug during Windows boot it I can get 22xx H2D (I have got sometimes as well 16XX H2D with classic boot method, but next reboot fixed it to 22XX). All tests done with 13" MB 2017 TouchBar + Aorus gaming box 1070

Now as NVIDIA eGPU is not officially supported under macOS, is there any test other test we can execute to proof that TB3 ports are only delivering 16xxMiB/s (13.42Gbps) H2D bandwidth which is not closet  the  22Gbps PCIe bandwidth specced by Intel ? So we can start maybe some refund process? 

2017 13" MacBook Pro TouchBar + GTX1070@32Gbps-TB3 (Aorus Gaming Box) + macOS10.13 & Win10


ReplyQuote
Smackintosh
(@smackintosh)
Active Member
Joined:8 months  ago
Posts: 12
November 9, 2017 9:21 am  

I get 22XX H2D on a 2016 13" macbook pro TB on both MacOS and Win10 (1611).  However, I always hotplug during windows boot when I see the swirly dots.  I tested before and after adding the NVIDIASUPPORTv2 kext on the mac side, and as expected, no change.  I don't use the apple_set_os.efi.

2016 13" Macbook Pro TB + GTX1070@32Gbps-TB3 (Aorus Gaming Box) + macOS10.13.1 + Win10 // 22XX H2D using hotplug


nando4 and goalque liked
ReplyQuote
goalque
(@goalque)
Prominent Member Admin
Joined:1 year  ago
Posts: 882
November 9, 2017 9:45 am  
Posted by: Smackintosh

I get 22XX H2D on a 2016 13" macbook pro TB on both MacOS and Win10 (1611).  However, I always hotplug during windows boot when I see the swirly dots.  I tested before and after adding the NVIDIASUPPORTv2 kext on the mac side, and as expected, no change.  I don't use the apple_set_os.efi.

Can you post a CUDA-Z screenshot, from the macOS side? Hot-plugging makes no difference?

automate-eGPU.shapple_set_os.efi
--
late-2016 13" Macbook Pro nTB + Vega64@32Gbps-TB3 (Netstor HL23T) + macOS & Win10
late-2016 13" Macbook Pro nTB + GTX980/RX580@32Gbps-TB3 (Netstor HL23T) + macOS10.13 & Win10


ReplyQuote
nando4
(@nando4)
Noble Member Admin
Joined:1 year  ago
Posts: 1678
November 9, 2017 10:26 am  

@Smackintosh, please do post a 22xx CUDA-Z H2D screencap from macOS when you hotplug your eGPU on boot. I've only ever seen 16xx from macOS CUDA-Z outputs.

Looks to be a problem with all 13" and 15" TB3 MBPs:

TB3 SystemCUDA-Z H2D bandwidth MiB/s
Source
 macOSmacOS, hotplugged at bootWindows via apple_set_os.efiWindows, no apple_set_os.efi
13" MBP (2017) 16xx-16xx22xx lexine
13" MBP (2016)-22xx-22xxSmackintosh
13" MBP (2016)16xx-16xx-goalque
15" MBP (2017)16xx--22xx Max Pham
15" MBP (2017)--16xx22xxchaosmage

 

Edited: 6 months  ago

eGPU Port Bandwidth Reference TableeGPU Setup 1.35


ReplyQuote
chaosmage
(@chaosmage)
Eminent Member
Joined:7 months  ago
Posts: 42
November 13, 2017 7:51 pm  

i confirm the issue with MBP 2017 15" RP560 on Aorus Gaming Box:

Windows via apple_set_os.efi - 16xx

Windows, no apple_set_os.efi - 22xx


nando4 liked
ReplyQuote
nando4
(@nando4)
Noble Member Admin
Joined:1 year  ago
Posts: 1678
November 14, 2017 12:04 pm  

Posted this issue to the Apple Developer's forum at https://forums.developer.apple.com/message/277344#277344 requesting:

Apple, please fix your firmware so that it doesn't throttle down the TB3 link to 13.42Gbps when it detects an Nvidia eGPU. Instead, pls allow the full 22Gbps TB3 bandwidth that you do not throttle for AMD eGPUs.

The post needed moderator approved. Here's a screengrab of the initial post:

apple egpu underperformance post

So deleted that post, and posted again, requiring mod approval at https://forums.developer.apple.com/message/278029#278029

apple blocks apple set os efi post

Edited: 6 months  ago

eGPU Port Bandwidth Reference TableeGPU Setup 1.35


ReplyQuote
chaosmage
(@chaosmage)
Eminent Member
Joined:7 months  ago
Posts: 42
November 16, 2017 5:36 pm  

Do they really react on these posts?


ReplyQuote
lexine
(@lexine)
Eminent Member
Joined:8 months  ago
Posts: 28
November 16, 2017 5:47 pm  

Well it was approved as the post was visible the other day on dev. forum, but now it seems it was deleted? 

2017 13" MacBook Pro TouchBar + GTX1070@32Gbps-TB3 (Aorus Gaming Box) + macOS10.13 & Win10


ReplyQuote
nando4
(@nando4)
Noble Member Admin
Joined:1 year  ago
Posts: 1678
November 16, 2017 5:53 pm  

@lexine, it was briefly visible.  I did an edit (not expecting it needed to be re-moderated), then it remained awaiting moderator approval.

So deleted that post, and posted again, requiring mod approval at https://forums.developer.apple.com/message/278029#278029

 

apple blocks apple set os efi post

eGPU Port Bandwidth Reference TableeGPU Setup 1.35


ReplyQuote
chaosmage
(@chaosmage)
Eminent Member
Joined:7 months  ago
Posts: 42
November 16, 2017 7:08 pm  

Do i understand correctly that on top of that TB3 port 25% performance degradation, we get controllers + internal display overheat, and end up in ~40% decrease compared to desktop GPU?


ReplyQuote
nando4
(@nando4)
Noble Member Admin
Joined:1 year  ago
Posts: 1678
November 17, 2017 10:50 am  
Posted by: nando4

@lexine, it was briefly visible.  I did an edit (not expecting it needed to be re-moderated), then it remained awaiting moderator approval.

So deleted that post, and posted again, requiring mod approval at https://forums.developer.apple.com/message/278029#278029

24hrs later and the post is still awaiting moderator approval. Looks like Apple is preventing this issue appearing on their forum.

Anybody else want to try posting this problem on the Apple developer forum? Maybe have better luck?

https://forums.developer.apple.com/community/graphics-and-games/vr-and-external-graphics

Edited: 6 months  ago

eGPU Port Bandwidth Reference TableeGPU Setup 1.35


ReplyQuote
Page 1 / 2 Next