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Usb c hub to 3.0 compatability?

S

Scopus

Member
Hey im thinking of getting a non powered usb c hub with 4 usb 3.0 ports, usb c power delivery port, and hdmi port. Need to know if possible to connect to a computer without a usb c port via a usb c to usb3 adapter and the ports will work?
Hdmi im pretty sure wont work as cant send video over usb but need the 4 usb 3.0 ports to work
 
Scopus said:
Yes , well sort of ,not sure if it reaches full usb 3.0 speeds. Its using a pcie 2.0 x1 usb 3.0 card
" PCIe 2.0 x1 interface limits read/write speed to 500MB/s"
Click to expand...
Yeah PCIe 2.0 x1 is 5GT/s (500MB/s)
USB 3.0 spec is technically 5gbps or 625MB/s.

So your USB 3.0 adapter isn't reaching full speeds, but it's getting most of the way there. For the full speeds the adapter would need to be PCIe 3.0 x1 or a PCIe 2.0 x4.
 
mnewsham said:
Yeah PCIe 2.0 x1 is 5GT/s (500MB/s)
USB 3.0 spec is technically 5gbps or 625MB/s.

So your USB 3.0 adapter isn't reaching full speeds, but it's getting most of the way there. For the full speeds the adapter would need to be PCIe 3.0 x1 or a PCIe 2.0 x4.
Click to expand...
Thanks,. Are those speeds per port on the pcie card? or divided between the ports?
 
Well the total bandwidth the PCIe 2.0 x1 connection can sustain is 500MB/s. So if there are two ports, yes it will be limited to then ~250MB/s per port.

If you have a motherboard with PCIe 3.0 there are some decent USB 3.1 PCIe 3.0 x4 cards that provide 10gbps per port, and the full spec 900mA power per port.

I'd recommend USB type-C at this point, or USB type-C and USB 3.1. USB type-C supports USB 3.1, but the port is reversible. However since it's newer you may not have the proper cables yet. If you do have USB type-C cables and devices already, even more of a reason to go with a USB type-C card.
https://www.amazon.com/dp/B071WYVQWT
 
That's per root device. You'd have to look at the model to know for sure. If the card has multiple root ports then technically each is supposed to be capable of 5gbps, though various things like the link back to the CPU would likely bottleneck in extreme situations. The card may very well have a hub switch inside though, which will limit you to likely a single USB 3.0 port speed
 
mnewsham said:
Well the total bandwidth the PCIe 2.0 x1 connection can sustain is 500MB/s. So if there are two ports, yes it will be limited to then ~250MB/s per port.

If you have a motherboard with PCIe 3.0 there are some decent USB 3.1 PCIe 3.0 x4 cards that provide 10gbps per port, and the full spec 900mA power per port.

I'd recommend USB type-C at this point, or USB type-C and USB 3.1. USB type-C supports USB 3.1, but the port is reversible. However since it's newer you may not have the proper cables yet. If you do have USB type-C cables and devices already, even more of a reason to go with a USB type-C card.
https://www.amazon.com/dp/B071WYVQWT
Click to expand...

250mb not so high :/ hopefully hub will work. My mb is pretty old so old pcie 2.0.

thecoolnessrune said:
That's per root device. You'd have to look at the model to know for sure. If the card has multiple root ports then technically each is supposed to be capable of 5gbps, though various things like the link back to the CPU would likely bottleneck in extreme situations. The card may very well have a hub switch inside though, which will limit you to likely a single USB 3.0 port speed
Click to expand...

This is model https://www.transcend-info.com/Support/No-283

The hub should still work right? Mostly will be used up with light usb devices-keyboard,mouse, dongles


This is hub im thinking of since only unpowered one i could find w 4 ports and hdmi.
https://www.amazon.com/gp/aw/d/B072...+3.0+ports&dpPl=1&dpID=416rNcDqW-L&ref=plSrch

Thanks
 
mnewsham said:
If you have a motherboard with PCIe 3.0 there are some decent USB 3.1 PCIe 3.0 x4 cards that provide 10gbps per port, and the full spec 900mA power per port.
Click to expand...

Asus even makes a special one with USB power delivery support. It can provide 3A per port, but uses type C connectors. Besides, any hub would have to support that input, and I'm not sure if any do.

https://www.asus.com/Motherboard-Accessory/USB-31-UPD-PANEL/

(don't let the front panel designation fool you, it works as an add-in PCIe card too)
 
Scopus said:
Not supported on my mb. My mb is old...
Click to expand...

PCIe is fully backward compatible. It'll work in any PCIe slot, regardless of manufacturer. Though you'll be limited to 500MB/s with a PCIe 2.0 slot, even if you install it in a x16 slot. You'll want to avoid the southbridge provided slots, as the ICH10 only provides PCIe 1.1 lanes.
 
Insert_Nickname said:
PCIe is fully backward compatible. It'll work in any PCIe slot, regardless of manufacturer. Though you'll be limited to 500MB/s with a PCIe 2.0 slot, even if you install it in a x16 slot. You'll want to avoid the southbridge provided slots, as the ICH10 only provides PCIe 1.1 lanes.
Click to expand...
Yes was thinking before could put usb c pcie card but dont see any benefit in doing so?
Wont get any additional speed past usb3.0 card(which is currently in 1x slot) and can just use usb c to usb3.0 adapter to connect the hub.

Thanks
 
Scopus said:
Yes was thinking before could put usb c pcie card but dont see any benefit in doing so?
Wont get any additional speed past usb3.0 card(which is currently in 1x slot) and can just use usb c to usb3.0 adapter to connect the hub.

Thanks
Click to expand...
If you use a PCIe 3.0 x4 card in a PCIe 2.0 x4 slot you'll still end up with 4x the bandwidth than your current PCIe 2.0 x1 card.
 
mnewsham said:
If you use a PCIe 3.0 x4 card in a PCIe 2.0 x4 slot you'll still end up with 4x the bandwidth than your current PCIe 2.0 x1 card.
Click to expand...

So to be clear, Right now i have two ports on the 1x card so im getting 250mb/s per port and if i upgrade to a usb c x4 card ill be able to get 500 mb/s for each port correct?

Think now will be worth getting since sounds like will essentially double the speed of each port from what im using now(250mb/s to 500mb/s)
Thanks
 
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