3 ms·

Words and specifications have to mean something, glad to see this. Corporations can't just change reality to their bizarre whims.

chx 8y ago
Could someone please sue Intel (possibly together with Lenovo, HP, Dell and god knows who else) for gimping the PCI Express over Thunderbolt 3 transfer speed to 22 gbit/s and yet having everyone and their dog advertise it as 40 gbit/s?? To begin with, they are feeding only four PCI Express 3.0 lanes into the controller so even without these strange limitation it would never be more than 32 gbit/s -- but it's 22. (Yes, the connector, the full bus can carry 40 gbit/s but it will only do so if you are using monitor(s) requiring more video bandwidth than a single 4K @ 60 Hz.) https://www8.hp.com/us/en/workstations/zbook-x360/index.html https://www8.hp.com/us/en/workstations/zbook-x360/index.html > Experience faster file upload and transfer speeds with Thunderbolt™ 3 - faster than USB 3.0 at 40 Gbps. https://www.lenovo.com/ca/en/laptops/thinkpad/thinkpad-p/ThinkPad-P72/p/22WS2WPWP72 https://www.lenovo.com/ca/en/laptops/thinkpad/thinkpad-p/Thi... > With dual Thunderbolt™ 3 ports, you can simultaneously use a 4K display and high-performance storage device—and tap blazingly-fast speeds at up to 40 Gbps. These are factually false, many on the egpu.io measured it and it's 22gbps and Figure 7 in the Technology Brief clearly shows it as well. https://thunderbolttechnology.net/sites/default/files/Thunderbolt3_TechBrief_FINAL.pdf https://thunderbolttechnology.net/sites/default/files/Thunde... Targus admits so: https://us.targus.com/blogs/discover-targus/thunderbolt-3-usb-type-c https://us.targus.com/blogs/discover-targus/thunderbolt-3-us... > at full Thunderbolt 3 data bandwidth of 22 Gbps. Dell admits too but you need to look very hard: https://www.dell.com/support/article/us/en/19/sln307875/thunderbolt-3-usb-c-maximum-data-transfer-rate-on-dell-systems?lang=en https://www.dell.com/support/article/us/en/19/sln307875/thun... > Thunderbolt 3 may only reach a maximum data transfer rate of around 7 to 22Gbps even though it is advertised with 40Gbps > Although Thunderbolt 3 is advertised with a bidirectional total data transfer rate of 40Gbps, simple data transfer like networking data or storage data are limited to a total of 22Gbps as per the official Thunderbolt 3 specifications. Why do you need to look hard? Because everywhere else, even in the single article linked from the above confession: https://www.dell.com/support/article/us/en/19/qna44089/thunderbolt-3-40gbps-data-transfer-rate?lang=en https://www.dell.com/support/article/us/en/19/qna44089/thund... > Systems with the 2 lane design will only support up to 20gbps data transfers over PCIe devices such as external hard drives or video cards that use PCIe. Systems with 4 lane design will support up to 40gbps of data transfer over PCIe depending on the device in use.

chx 8y ago

Could someone please sue Intel (possibly together with Lenovo, HP, Dell and god knows who else) for gimping the PCI Express over Thunderbolt 3 transfer speed to 22 gbit/s and yet having everyone and their dog advertise it as 40 gbit/s?? To begin with, they are feeding only four PCI Express 3.0 lanes into the controller so even without these strange limitation it would never be more than 32 gbit/s -- but it's 22. (Yes, the connector, the full bus can carry 40 gbit/s but it will only do so if you are using monitor(s) requiring more video bandwidth than a single 4K @ 60 Hz.) https://www8.hp.com/us/en/workstations/zbook-x360/index.html https://www8.hp.com/us/en/workstations/zbook-x360/index.html > Experience faster file upload and transfer speeds with Thunderbolt™ 3 - faster than USB 3.0 at 40 Gbps. https://www.lenovo.com/ca/en/laptops/thinkpad/thinkpad-p/ThinkPad-P72/p/22WS2WPWP72 https://www.lenovo.com/ca/en/laptops/thinkpad/thinkpad-p/Thi... > With dual Thunderbolt™ 3 ports, you can simultaneously use a 4K display and high-performance storage device—and tap blazingly-fast speeds at up to 40 Gbps. These are factually false, many on the egpu.io measured it and it's 22gbps and Figure 7 in the Technology Brief clearly shows it as well. https://thunderbolttechnology.net/sites/default/files/Thunderbolt3_TechBrief_FINAL.pdf https://thunderbolttechnology.net/sites/default/files/Thunde... Targus admits so: https://us.targus.com/blogs/discover-targus/thunderbolt-3-usb-type-c https://us.targus.com/blogs/discover-targus/thunderbolt-3-us... > at full Thunderbolt 3 data bandwidth of 22 Gbps. Dell admits too but you need to look very hard: https://www.dell.com/support/article/us/en/19/sln307875/thunderbolt-3-usb-c-maximum-data-transfer-rate-on-dell-systems?lang=en https://www.dell.com/support/article/us/en/19/sln307875/thun... > Thunderbolt 3 may only reach a maximum data transfer rate of around 7 to 22Gbps even though it is advertised with 40Gbps > Although Thunderbolt 3 is advertised with a bidirectional total data transfer rate of 40Gbps, simple data transfer like networking data or storage data are limited to a total of 22Gbps as per the official Thunderbolt 3 specifications. Why do you need to look hard? Because everywhere else, even in the single article linked from the above confession: https://www.dell.com/support/article/us/en/19/qna44089/thunderbolt-3-40gbps-data-transfer-rate?lang=en https://www.dell.com/support/article/us/en/19/qna44089/thund... > Systems with the 2 lane design will only support up to 20gbps data transfers over PCIe devices such as external hard drives or video cards that use PCIe. Systems with 4 lane design will support up to 40gbps of data transfer over PCIe depending on the device in use.