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Guru3D.com » News » ASUS outs Thunderbolt EX4 PCI-Express3.0 (x4) ThunderBolt card

ASUS outs Thunderbolt EX4 PCI-Express3.0 (x4) ThunderBolt card

by Hilbert Hagedoorn on: 03/01/2021 09:14 AM | source: | 4 comment(s)
ASUS outs Thunderbolt EX4 PCI-Express3.0 (x4) ThunderBolt card

ASUSTeK announceda new revisiopn to their cards, the PCI-Express3.0 (x4) expansion card "Thunderbolt EX 4" that adds 2-port Thunderbolt 4.

The expansion card with PCI-Express3.0 (x4) connection that can add 2 ports of Intel-certified Thunderbolt 4. With a bandwidth of 40 Gbps, it can be equipped with high-speed external storage that far exceeds USB. It also supports daisy chain connection, which can greatly increase the expandability of the PC.

In addition, the main unit is equipped with a miniDisplayPort 1.4 x 2 that supports 8K ultra-high resolution output, making it suitable for building a multi-display environment. At this time, there are no sales announcements for this product in the domestic market.



ASUS outs Thunderbolt EX4 PCI-Express3.0 (x4) ThunderBolt card




« MSI releases 2 types modular power supply MPG A850GF Gold Certfied · ASUS outs Thunderbolt EX4 PCI-Express3.0 (x4) ThunderBolt card · Next-gen AMD EPYC (Genoa) Would get 50% larger socket SP5, 96 cores and 400W TDP »

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asturur
Senior Member



Posts: 1220
Joined: 2010-05-12

#5891739 Posted on: 03/01/2021 09:45 PM
Isn't 3.0 x 4 a bandwidth of 32Gbps? how does it support 2 port of 40Gbps each?
What am i missing here?

asve
Junior Member



Posts: 2
Joined: 2015-12-19

#5891764 Posted on: 03/01/2021 11:29 PM
dp 1.4 is 25.92 Gbit/s
pci-e 3.0 x4 is 31,504 Gbit/s
25.92 x 2 + 31,504 = 83,344 Gbit/s

2 x 40 Gbit/s Thunderbolt is almost enough for the incomming max bandwidth.

ColinB
Junior Member



Posts: 7
Joined: 2020-11-23

#5892015 Posted on: 03/02/2021 09:22 PM
From ASUS' own site:
"40 Gbps bi-directional bandwidth for superfast data transfers and video output"

Not sure how "bi-directional bandwidth" relates to video OUTPUT....

Kevin Mauro
Senior Member



Posts: 325
Joined: 2020-11-03

#5892087 Posted on: 03/03/2021 06:04 AM

PCI-E 3.0 (x4) is saturating just under 4 gigabytes of bandwidth
ASUS's card can handle about 5 gigabytes approx total
It requires an ASUS-specific motherboard to achieve this
To qualify that it utilizes the USB 2.0 headers for additional data flow and an ASUS-specific TB header cable.
This fills in that additional leftover 1 gigabyte of data "gap" if you want to call it that.
Bi-directional doesn't mean 10 gigabytes of data transfer total
I'd assume if using both TB4 ports there'd be load balancing involved
I'm using bytes not bits
Bear in mind the 3.0 bus can handle more than the previously known theoretical limit but those locks were maintained by most vendors given timing issues with the lanes and that also is dependant on the CPU - that could also have to do with that TB header/cable being needed for timing - possible something here maybe not - who knows. Maybe they're overclocking the bus and using dedicated hardware for timing. Either way, I think it seems ... shoddy & find it unusual it's advertised as "Intel certified" it looks like "suspect" advertising to me. If anything a component that may be "Intel certified" combined with a series of ones that possibly aren't...


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