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TB3 cables 50cm, 80cm (both passive) and 150cm (active). TB2 cables with TB2->TB...
 

TB3 cables 50cm, 80cm (both passive) and 150cm (active). TB2 cables with TB2->TB3 adapter. USB 3.1 Gen 2 vs USB3.0 vs USB2.0  

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OliverB
(@oliverb)
Noble Member
Joined: 10 months ago
 

I made some benchmarks for different Thunderbolt Cables. The benchmarks for the TB2 have the problems that the Host-System, a 13" MacBookPro 2015, is less performant than the TB3 Hostsystem, a 15" MacBookPro 2018, but this is not always a big factor.
The first 3 rows are MacOSX Benchmarks, the second 3 are Windows.  Discussion will follow.

TB3 - 50cm passive TB3 - 80cm passive TB3 - 150cm active TB2 -> TB3 100cm active
gfxBench2018eGPU 50cm

gfxBench2018eGPU 80m

gfxBench2018eGPU 150m

gfxBench2015eGPU TB2

LuxMark2018eGPU 50cm

LuxMark2018eGPU 80cm

LuxMark2018eGPU 150cm

Luxmark2015eGPU TB2

CCuda Mac 50cm

CCuda Mac 80cm

CCuda Mac 150cm

CCuda Mac TB2

CCuda Win10 50cm

CCuda Win10 80cm

CCuda Win10 150cm

CCuda Win10 TB2

Unigine Valley Benchmark 1.0 50cm

Unigine Valley Benchmark 1.0 80cm

Unigine Valley Benchmark 1.0 150cm

Unigine Valley Benchmark 1.0 TB2

TR 50cm

TR 80cm

TR 150cm

TR TB2

2018 15" MBP & 2015 13" MBP connected to RTX2080Ti GTX1080Ti GTX1080 Vega56 RX580 R9-290 GTX680


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OliverB
(@oliverb)
Noble Member
Joined: 10 months ago
 

Some conclusion from the results:

- Under MacOSX the active cable 150cm has a bandwith drop from about 10%. GfxBench Metal Offscreen, which is very reliable, drops about 5% with the 150cm active cable.
- Under Windows 10 there doesn't seem to be any drop.
- The performance of the passive cables 50cm and 80cm is the same on both systems.
- Games and synthetic benchmarks like Ungine Valley look the same for each TB3 cable. However, their performances are clearly influenced by less powerful CPU.
- The bandwith for the TB2->TB3 setup is about 55% compared to the pure TB3 system.
- Luxmark is hardly affected by the lower bandwith of the TB2 -> TB3 setup.
- The Cuda Values for "Pageable" are much higher for MacOSX than Windows. It's unknown if this has any relevance to the general performance.
- There is no reduced bandwith for MacOSX Systems, as mentionedbefore  in this forum.
- Another note: The TB3 150cm active cable only supports USB2.0, if used for it.

2018 15" MBP & 2015 13" MBP connected to RTX2080Ti GTX1080Ti GTX1080 Vega56 RX580 R9-290 GTX680


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OliverB
(@oliverb)
Noble Member
Joined: 10 months ago
 

I made some benchmarks concerning USB Protocol and TB3 cables: To measure DiskSpeed I built a SSD external with the following hardware:
-XT-Xinte USB3.1 TO PCI-e NVMe SSD Enclosure
-Kingston A1000 SA1000M8/240G SSD

connected to: DiskSpeed:
MacBookPro 2018 TB3-Port, via
-50 cm passive TB3-cable
-80 cm passive TB3-cable
-100 cm USBC-cable
KI TB3direct

Asus XG Station Pro USB-C 10 Gbit/s Port, via
-50 cm passive TB3-cable
KI Asus USBC 10Gbit

Adapter with USB-A (3.0) Port or USB-C 5 Gbit/s Port
or MacBookPro 2018 USB-A (3.0) Port, via
-30 cm USB-A <-> USB-C cable
KI TB3 5GBit Usbc Hyperdrive

MacBookPro 2018 TB3-Port, via
- 150cm active TB3 cable
KI TB3 active 150cm

 

Samsung S24H850-USB2.0-Hub, via
-30 cm USB-A <-> USB-C cable
KI MonitorUSB Hub

2018 15" MBP & 2015 13" MBP connected to RTX2080Ti GTX1080Ti GTX1080 Vega56 RX580 R9-290 GTX680


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OliverB
(@oliverb)
Noble Member
Joined: 10 months ago
 

Note:
- The write speed via USB3.1 Gen2 Protocol is mostly 800MB/s, at the end of test it falls back to 600MB/s for some yet unknown reason.
- The maximal transfer speed for read I measured was 955 MB/s.
- You have to use an NVMe SSD to get to those transfer rated, because SATA is limited to 6 Gbit/s.
- It's very notable to work with the 10GB/s protocol, the read transfer is more than double and it feels even more.
- The Asus XP Station Pro actually upgrades the USB3 ability of Macbook (Pros) 2015 and older with Thunderbolt 1/2 from 5 GBit/s to 10GBit/s.
- It's correct, that active TB3 cables only support USB2.0

The differences between nominal and real transfer rates are:

Protocol Nominal Real Lost Ratio
USB3.1 Gen 2 10 Gbit/s 7.64 Gbit/s 23.6%
USB3.0 5 Gbit/s 3.33 Gbit/s 33.4%
USB2.0 480 MBit/s 333 Mbit/s 30.5%

2018 15" MBP & 2015 13" MBP connected to RTX2080Ti GTX1080Ti GTX1080 Vega56 RX580 R9-290 GTX680


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 chx
(@chx)
Estimable Member
Joined: 2 years ago
 
Posted by: OliverB

Note:
- The write speed via USB3.1 Gen2 Protocol is mostly 800GB/s, at the end of test it falls back to 600GB/s for some yet unknown reason.
- The maximal transfer speed for read I measured was 955 GB/s.

I think that was megabyte per second.

Lenovo ThinkPad 25 -- GALAX SNPR TB3 1060 -- Lenovo Graphics Dock -- Benq BL2411PT - - two PackedPixels - Dasung not-eReader backer


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OliverB
(@oliverb)
Noble Member
Joined: 10 months ago
 
Posted by: chx
Posted by: OliverB

Note:
- The write speed via USB3.1 Gen2 Protocol is mostly 800GB/s, at the end of test it falls back to 600GB/s for some yet unknown reason.
- The maximal transfer speed for read I measured was 955 GB/s.

I think that was megabyte per second.

Of course! Thank you for your hint.

2018 15" MBP & 2015 13" MBP connected to RTX2080Ti GTX1080Ti GTX1080 Vega56 RX580 R9-290 GTX680


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