On the return side, the maximum bandwidth seen turned out to be 22.11 Gbps. It can be observed that activating the display output link reduces performance for the host-to-device traffic from 20.57 Gbps to 13.78 Gbps, while total used bandwidth on the host to device side moves up from 20.57 Gbps to 28.5 Gbps. As part of our experiments, we attempted to activate traffic in pairs - one set with the display routing turned off, and another set with the USBC-HDMI part active. It must be noted that the Thunderbolt data rates are bidirectional - logically speaking, we have a 40 Gbps link from the host to the device, and another 40 Gbps link from the device to the host. Port #3 (Connection to LG34WK95U via Plugable's USBC-HDMI) Port #2 (PowerColor Gaming Station eGFX Enclosure)
Port #1 (DIY TEKQ Rapide Thunderbolt 3 SSD) The DIY Thunderbolt 3 SSD was subject to a fio workload, while the eGPU in the Gaming Station was subject to an OpenCL bandwidth test (transferring data from the host to the device VRAM, and back). Various workload combinations were processed to determine the real-world effects of bandwidth sharing between the peripherals connected to the hub. All primary connections to the Thunderbolt port (other than the displays and associated routing gear) are visible in it.
The Thunderbolt Control Center can be use to approve connected devices. Port # - USBC-HDMI connector on to a LG34WK95U configured to display a 3840x2160 desktop at 60 Hz (8-bit RGB).Port #2 - PowerColor Gaming Station eGFX Solution with the PowerColor Radeon RX Vega 56 Nano.Port #1 - DIY Thunderbolt 3 SSD using the TEKQ Rapide and the WD_BLACK SN750.The downstream ports were connected as per the list below. The upstream port of the TBT4-HUB3C is connected to the Thunderbolt 4 port of the ASRock Industrial NUC BOX-1165G7 - a risky choice, given that the port is only certified for USB 3.2 Gen 2 / DisplayPort Alternate Mode. Our performance evaluation is restricted to the configurations specified below. The number of use-case scenarios for Thunderbolt 4 hubs such as the Plugable TBT4-HUB3C are too many to count. Additionally, it allows the peripherals to be disconnected independent of each other - something not possible in the chain topology without interrupting the links to peripherals intended to be kept active. This also brings out the benefits of the hub scheme - With daisy chaining no longer in the picture for most deployments (each spoke in the hub can still be a daisy chain in Thunderbolt 4), users do not need to worry about the placement of different Thunderbolt peripherals / displays in the chain. The intent is to route the incoming display signals from the host to one of the downstream Thunderbolt 4 ports, and then on to a HDMI monitor. Plugable also bundles a USBC-HDMI adapter (USB-C male to HDMI 2.0 female converter supporting DisplayPort Alternate Mode from the USB-C side) with the package. The hub tips the scales at 201g, light enough to be considered pocketable. Despite the small size, the unit has a solid look and feel with its brushed finish. The main hub itself is quite tiny compared to the power brick, measuring just 118 mm x 18 mm x 73 mm. The TBT4-HUB3C comes with a 0.8m passive Thunderbolt 4 cable, a 110W power brick, and a bundled USB-C to HDMI adapter supporting resolutions up to 4Kp60 with HDR.
The JHL8440 Goshen Ridge controller used in the hub is a quad-port solution - one upstream, and three downstream ports. These cables complement the Thunderbolt 4 flagship from Plugable - the Goshen Ridge-based TBT4-HUB3C. The pricing premium is due to increased certification costs (the factory is required to get random manufacturing lots repeatedly tested for Thunderbolt 4 cables, compared to only the initial manufacturing run previously). The TBT4-40G2M (active) and TBT4-40G1M (passive) are Intel-certified Thunderbolt 4 cables, priced at $59 ($49 after coupon application) and $34 ($29 after coupon application) respectively. Active cables up to 2m in length and supporting up to 40Gbps speeds - maximum possible based on the host / device interfaces (Thunderbolt 3 active cables with non-Thunderbolt 3 Type-C devices are often limited to USB 2.0 speeds).Hub functionality in addition to the daisy-chaining scheme prevalent in previous Thunderbolt versions.It is these new features that Plugable is focusing on: In fact, under the hood, the specifications were being fine-tuned to bring in some features from the USB world.
Daisy chain usb for mac upgrade#
As peak bandwidth (40Gbps) didn't get an upgrade over Thunderbolt 3, many consumers just considered it a branding update. Intel had provided detailed updates on Thunderbolt 4 in mid-2020 before releasing it in Tiger Lake-based products. Joining it are two Thunderbolt 4 cables - the 2m.
Plugable is introducing its Thunderbolt 4 product lineup today, with the TBT4-HUB3C Thunderbolt 4 Hub leading the pack.
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