USB 3 cap speed?

[Swinzon]

Soooo, the web says that USB 3 can do up to 625 ish MB/s, but my USB 3 Kingston USB stick only transfers at around 30MB/s?
Same as external USB 3 HDD`s etc etc. How come it not use more?
 

[PeachyUwUSenpai]

how much did you pay for that usb stick?

[Swinzon]

1 minute ago, Alaradia said:

how much did you pay for that usb stick?

Don`t remember, it was on sale. 
Think I payed around 30 bucks or so? 
 

[PeachyUwUSenpai]

1 minute ago, Swinzon said:

Don`t remember, it was on sale. 
Think I payed around 30 bucks or so? 
 

do you have the model number?

[Swinzon]

1 minute ago, Alaradia said:

do you have the model number?

It`s a Kingston DataTraveler 3.0 USB Device, can`t seem to find anything else.
It`s a USB 3 device fyi

[Morgan MLGman]

3 minutes ago, Swinzon said:

It`s a Kingston DataTraveler 3.0 USB Device, can`t seem to find anything else.
It`s a USB 3 device fyi

You need a USB 3.0 port in the PC. From my personal experience USB 2.0 does around 30MB/s of transfer (copy/write) and USB 3.0 does around 90MB/s.

[Swinzon]

2 minutes ago, Morgan MLGman said:

You need a USB 3.0 port in the PC. From my personal experience USB 2.0 does around 30MB/s of transfer (copy/write) and USB 3.0 does around 90MB/s.

I got a USB 3 port on my PC?
5 of them to be exact, 2 on the case and 3 on the back of the mobo.
Plus 5 on a USB 3 hub connected via a USB 3 cable to the USB 3 port on the back

[alextulu]

32 minutes ago, Swinzon said:

Soooo, the web says that USB 3 can do up to 625 ish MB/s

That is the maximum speed of the USB connection.

 

32 minutes ago, Swinzon said:

but my USB 3 Kingston USB stick only transfers at around 30MB/s?

That is the speed of your thumb drive.

 

The speed of USB and the speed of the drive are 2 different things.

[jj9987]

6 minutes ago, alextulu said:

That is the maximum speed of the USB connection.

 

That is the speed of your thumb drive.

 

The speed of USB and the speed of the drive are 2 different things.

This.

 

Plus often manufacturers use rather bad controllers, which are not really fast at file transfer.

[Oshino Shinobu]

If it's the same drive as tested here, it's not a fast drive. Maxed out at 42MB/s. If you have a smaller capacity, it makes sense that it's slow as the speed of flash NAND drives tends to scale with capacity (up to a point)

[alextulu]

2 minutes ago, jj9987 said:

Plus often manufacturers use rather bad controllers, which are not really fast at file transfer.

Also, at just 30 MB/s you don't need USB 3.   USB 2 is good enough for that speed.

 

The just use USB 3 for marketing purposes only.

[Mr.Meerkat]

225MB/s~ is what I can get with my Sandisk Extreme 64GB USB 3.0 stick  

Obviously it depends on the USB drive you're using (i.e. what Nand it uses, what controller it uses ect.) sooooooo...ya know...

 

Also USB 3.0 can't deliver the full 5Gbps (0.625GB/s, 640MB/s) due to overhead and what not so real life speeds max out at around 400MB/s. 

[Swinzon]

1 hour ago, alextulu said:

That is the maximum speed of the USB connection.

 

That is the speed of your thumb drive.

 

The speed of USB and the speed of the drive are 2 different things.

But every USB drive that I have used caps at 30 MB/s, every damn external HDD and USB thumb drive...

[Swinzon]

43 minutes ago, Mr.Meerkat said:

225MB/s~ is what I can get with my Sandisk Extreme 64GB USB 3.0 stick  

Obviously it depends on the USB drive you're using (i.e. what Nand it uses, what controller it uses ect.) sooooooo...ya know...

 

Also USB 3.0 can't deliver the full 5Gbps (0.625GB/s, 640MB/s) due to overhead and what not so real life speeds max out at around 400MB/s. 

Maybe buying a SanDisk Extreme tomorrow...

[alextulu]

8 minutes ago, Swinzon said:

But every USB drive that I have used caps at 30 MB/s, every damn external HDD and USB thumb drive...

What OS are you using?

 

Win 7 doesn't support USB 3, so it uses the USB 3 ports at USB 2 speed.

[Swinzon]

1 minute ago, alextulu said:

What OS are you using?

 

Win 7 doesn't support USB 3, so it uses the USB 3 ports at USB 2 speed.

Windows 10

[Mr.Meerkat]

29 minutes ago, alextulu said:

Win 7 doesn't support USB 3, so it uses the USB 3 ports at USB 2 speed.

Wut are you on? Windows 7 definitely supports USB 3.0...

[Mira Yurizaki]

1 hour ago, Swinzon said:

But every USB drive that I have used caps at 30 MB/s, every damn external HDD and USB thumb drive...

This makes me question if those HDDs were really USB 3.0. Thumb drives are a different matter.

[Swinzon]

13 hours ago, M.Yurizaki said:

This makes me question if those HDDs were really USB 3.0. Thumb drives are a different matter.

That`s true, but when every god damn USB 3 device caps at 30MB/s? Every single god damn one?
Even my internal HDD`s hooked up to a SATA -> USB PCB thingy that I use to scan the hard drives caps at 30MB/s scanning speed....
 

[JoostinOnline]

14 hours ago, Swinzon said:

But every USB drive that I have used caps at 30 MB/s, every damn external HDD and USB thumb drive...

It's probably your HDD that's bottlenecking the speed.  I would imagine that your HDD has a max sequential read speed of 30MB/s.

[Swinzon]

2 minutes ago, JoostinOnline said:

It's probably your HDD that's bottlenecking the speed.  I would imagine that your HDD has a max sequential read speed of 30MB/s.

Hahahah, lol

But that could be it yes, but still, every USB device that caps at 30MB/s? It`s weird, even my laptop which has the most amazing ever USB 3.0 SuperSpeed caps at 30MB/s...

[JoostinOnline]

1 minute ago, Swinzon said:

Hahahah, lol

But that could be it yes, but still, every USB device that caps at 30MB/s? It`s weird, even my laptop which has the most amazing ever USB 3.0 SuperSpeed caps at 30MB/s...

That's my point.   USB 3.0 has a high theoretical bandwidth, but it's still going to be limited by the slowest component.

 

If read speeds on your HDD are 30MB/s and write speeds on your flash drive are 50MB/s, it's only going to transfer at 30MB/s.  If you flip that, so read speeds on your HDD are 50MB/s and write speeds on your flash drive are 30MB/s, it will still only transfer at 30MB/s

[Swinzon]

36 minutes ago, JoostinOnline said:

That's my point.   USB 3.0 has a high theoretical bandwidth, but it's still going to be limited by the slowest component.

 

If read speeds on your HDD are 30MB/s and write speeds on your flash drive are 50MB/s, it's only going to transfer at 30MB/s.  If you flip that, so read speeds on your HDD are 50MB/s and write speeds on your flash drive are 30MB/s, it will still only transfer at 30MB/s

But I`ve seen many other people with the same External Drive get up to 100MB/s in transfer speed over USB 3.0?

[JoostinOnline]

1 minute ago, Swinzon said:

But I`ve seen many other people with the same External Drive get up to 100MB/s in transfer speed over USB 3.0?

If I'm right, then it's because their internal drives have a 100MB/s sequential read speed.  Try copying something from your flash drive to your HDD.  I bet you'll see different speeds.

[Mira Yurizaki]

A better test would be to copy from the external HDD to an internal HDD.

 

However it also depends on what you're copying. Copying 1000 files totaling 100MB is going to take a lot longer than a single 100MB file.

 

Also it would be nice to know what external HDD you're using. 30MB/s sounds like it's either a USB 2.0 device or the speed has been negotiated to USB 2.0