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About Inateck RedComets Series
Inateck is dedicated to enhancing the digital lifestyle of our customers. The newly-released RedComets series is a product line custom developed by Inateck team to offer solutions for PCIe to USB ports extension. We have all along pursued the highest industry standard to develop each of our products. Utilizing the cutting-edge chips, our engineers designed the circuitry and safety functions of the RedComets U21 PCIe to USB 3.2 Gen 2 Extension card with expertise and craftsmanship. All for providing you with the most professional computer port extension solution.
Fast-Speed Transfer
The USB Type-A port near the PCIe interface exclusively takes 10 Gbps bandwidth. The other four USB ports share 10 Gbps bandwidth, and each port can achieve 10 Gbps rate when used solely.
Wide Compatibility
The extension card is compatible with Windows 11，7, 8, 10 and Mac OS 10.8.2 and above. It requires installing a driver before operating on Windows 7. Users can download the driver from Inateck’s official website. Driver-free for Windows 8, 10 and Mac OS 10.8.2 and above.
Safety First
The card draws power from the PCIe slot on the motherboard. No external power adapter is required. Hassle-free installation is guaranteed. The card works with the motherboards of PCIe 2.0 protocols and above. It functions with PCIe x 4, x 8 and x 16 slots.
The USB Type-A ports support a maximum 5W power, and the USB Type-C ports 15W, all with over-current protection.
Low profile is not supported.
Package List
1 x Inateck RedComets U21 PCIe to USB 3.2 Gen 2 Card
1 x Back plate
1 x Cross Screwdriver
4 x Screws
1 x Instruction Manual
Arthur J. Heller
2025-08-01 10:02:49
I use an older MacBook Pro (mid-2012), which has a total of two whole USB3 ports on the side. When at home, I use Thunderbolt to dock to an external PCIe expansion chassis, which I have populated with one of these cards.Inateck has thought about almost everything. Data throughput is amazing: the speed is just {chef's kiss}, and ease of installation is a breeze. It's even bus-powered, so you don't need to worry about about finding a free SATA power cable (if you're in a desktop machine) or try to rig up some Frankenstein-esque power adapter for the Thunderbolt box. The thing just works -- no drivers required -- PC, Mac, and Linux, and has been a lifesaver for me because I've got a metric tonne of USB devices that I need to have plugged in at once, and I don't want to bog down my notebook's internal USB bus with bunch of daisy-chained hubs. I've even gone so far as to get a second card for my gaming PC, and a second Thunderbolt expansion chassis, just so I can add another one of these to my laptop (yes, I have that many USB devices -- see included images).Also, because this card is a USB3.2 gen 2, it offers an upgrade over the built-in, vanilla USB 3.0 ports that my MacBook Pro clings to, which is also nice. If you're using a mid-2011 MacBook Pro, which only has USB 2.0, the upgrade is even more bombastic. The inclusion of two USB-C ports is also a great selling point, even if there are only two. They perform their duties with gusto and grace, and I cannot conjure any complaints at all about this product. All this for forty bucks, mind you, when similar items with far fewer ports can go for twice as much, at least.I definitely recommend this product to anyone that needs more USB ports, be it on your gaming rig, bidness computer, or notebook computer's Thunderbolt box. You cannot beat this for expandability and ease-of-use for the price.
sarusa
2025-07-27 19:53:41
I bought a used Steelseries Arena9 5.1 speaker system - well, it seems that streaming 6 channels at 96 KHz for games is a lot of bandwidth and was just swamping my USB, keyboard and mouse were having fits. And I needed more ports anyhow. So I ordered this, stuck it in, moved the Arena9 to one of the ports and everything is working perfectly now. The sound is great and the rest of my USB are responsive again.It's a little weird that you have to screw the endplate to it, but it comes with screws and a little screwdriver, so no problem! It was easy, it worked with no effort, what more could you ask for?
Ken Hubalik
2025-06-20 12:56:17
I wanted more USB-C ports on my tower PC and I wanted the latest USB 3.2 tech without going through diver hell to get it working in my PC and I wanted to pay a reasonable price. The price was reasonable and it physically installed fast into my Windows 10 tower PC (AMD CPU). When I powered the PC up it recognized the card the first time with no additional drivers to install. So far all devices plugged into the card's usb ports work without fail and seem to be pretty fast for external disk drives. I read some reviews saying this card sacrifices some potential throughput for increased compatibility. That my may be true but I have so far not taken the time to measure how fast it is. My non-scientific assessment so far is it seems plenty fast to me. I recommend the card.
Brandon
2025-06-14 20:49:54
Other reviewers have said this doesn't work with the X570-UD motherboard. This whole time, I've had weird boot issues leading up to UEFI partition corruption - I have no idea if the card caused this, but just as an aside. Ever since switching to legacy boot, boot problems went away. In the mean-time, one of the USB-C ports would report errors with `dmesg`, but none of the others. Until a few days later when the USB card suddenly sputtered out and died when I plugged in a USB 1.1 device that I just yanked from another computer where it worked fine, and now nothing works (not even my mouse). I haven't even bothered to reboot the system and try again, I'm just done with these problems and asking for a refund.Here are my syslogs:Jun 24 19:21:29 user-X570-UD kernel: [32940.114513] xhci_hcd 0000:05:00.0: xHCI host controller not responding, assume deadJun 24 19:21:29 user-X570-UD kernel: [32940.114544] xhci_hcd 0000:05:00.0: HC died; cleaning upJun 24 19:21:29 user-X570-UD kernel: [32940.114544] xhci_hcd 0000:05:00.0: Timeout while waiting for stop endpoint commandJun 24 19:21:29 user-X570-UD kernel: [32940.156612] usb 1-2: USB disconnect, device number 2Jun 24 19:21:29 user-X570-UD kernel: [32940.156615] usb 1-2.3: USB disconnect, device number 3Jun 24 19:21:29 user-X570-UD kernel: [32940.156714] usb 2-2: USB disconnect, device number 2Jun 24 19:21:29 user-X570-UD kernel: [32940.114513] xhci_hcd 0000:05:00.0: xHCI host controller not responding, assume deadJun 24 19:21:29 user-X570-UD kernel: [32940.114544] xhci_hcd 0000:05:00.0: HC died; cleaning upJun 24 19:21:29 user-X570-UD kernel: [32940.114544] xhci_hcd 0000:05:00.0: Timeout while waiting for stop endpoint commandJun 24 19:21:29 user-X570-UD kernel: [32940.156612] usb 1-2: USB disconnect, device number 2Jun 24 19:21:29 user-X570-UD kernel: [32940.156615] usb 1-2.3: USB disconnect, device number 3Jun 24 19:21:29 user-X570-UD kernel: [32940.156714] usb 2-2: USB disconnect, device number 2
Md.Stamen
2025-06-13 17:40:51
I tried a lot of different cards for my Dell XPS 8950 liquid cooled CPU. For some reason Dell's are fickle. This one works. In order for this to fully work I needed to have one of the USB slots filled. It automatically loaded the drivers. The Dell diagnostics will not pass PCI unless you have a USB filled in the pci device. I fully tested and I am satisfied. I have a second Dell XPS 8950 air cooled. That one will take almost any card without a problem. So remember they are 2 different animals. And I am running Windows 11.
Michele
2025-05-30 10:57:25
Ho montato la scheda su un PC vecchio di 4 anni con Windows 10.L'ho installata in meno di 3 minuti. Si è adattata perfettamente al case/scheda madre e, una volta acceso PC, la scheda è stata riconosciuta e ha iniziato a funzionare perfettamente senza bisogno di alcun driver aggiuntivo. La velocità delle porte è quella che mi aspettavo per la tipologia (USB-3 e USB-C)Costa un po' di più della diretta concorrenza ma sicuramente il prodotto vale il prezzo.
Mike
2025-05-29 11:33:49
I was hesitant about which PCIe card to buy, given that there are so many with varying price ranges, features, reputations and most offputtingly, reviews! Originally I was looking at StarTech.com's 2x USB-C PCIe card for around £50. I had never heard about Inateck before, but with the addition of 3 x USB 3.0 (you can never have too many) and for a slightly cheaper price, I felt it was the right choice to make, and so I threw my dice...I'm so happy with the result. Fantastic power for a good price. Just stick it in and off you go. No driver updates necessary! Don't hesitate to buy this if you're umming and ahing; you'll be very pleased with your purchase
Unkalen
2025-05-21 17:17:05
I had been reluctant to add PCI-E Cards to my big I9 computer for fear of 'restricting' its pure grunt. But this new PCI-E Card has more than trebled our data transmission speeds and it was so easy to install. Great result and no problems with Driver Updates either . . . Totally recommended and a great price.
Alacranpro
2025-05-10 18:43:44
Compré dos, una para cada maquina virtual en UnRaid, funciona bien dando como maximo 1130Mbps con un adaptador m2 usb 3.2. PodrÃa ser mas barato? SÃ! Los hay mejores ni “PIâ€, usé anteriormente un adaptador de asus que incorpora el chip asm1142 y lo mismo pero a 890Mbps asi se nota diferencia pero ademas trae 3 usb tipo b y 2 usb c, carga bastante bien nada descatable pero para tener un movil cargando mientras pierdes la vida delante la pantalla no esta mal, asi te carga el movil donde perderas el resto de vida. Ale disfrutad que vale la pena
nadoso
2025-02-13 15:36:48
acheté pour un pc et permettre d'avoir des sortir en usb a 3.2 mais surtout des sortie en usb c .En ce qui me concerne cette carte fonctionne parfaitement. Pas besoin d'alimentation externe , reconnu par windows 11.Associée un HUB UGREEN USB C . et rallonge UGREEN male / femelle . J'ai constaté un taux de transfert vers un SDD T7 de samsung de 535 mo/s ( transfert de vidéos de plus de 25 go).Ma carte mère n'étant pas de dernière génération , je considère ce résultat satisfaisant . Quant à l'USB A 3.2 le taus avoisine les 400 mb/S ; mission remplie
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