Why do we even have USB 3.0? It doesn't seem any faster.

[pkim1230]

I have a computer with only USB 2.0 interfaces.
I recently bought a 128gb flash drive that has USB 3.0 interface.
I have heard USB 3.0 is ten times faster than USB 2.0, so I installed a PCI express USB 3.0 card in my PCIE slot, and installed the drivers as well.
When I write to my 128gb flash drive, the speed of USB 2.0 slot writes at about 23mb/s.
When I write to my flash drive using the newly installed USB 3.0 slot, it goes at 27mb/s.
That's not ten times. It's just a little more. I was expecting near 200mb/s write speed.
What am I missing here, and is this the point of USB 3.0? Thank you

 

[pkim1230]

no theres a very wide gap between flash drives i did a lot of looking before getting the sandisk extreme

thats when i noticed if they dont clearly give a read and write speed to look a lot more carefully at the drive--if your drive can do really good read and write

you are going to shout about it not just say up to xx speed with out giving the write speed as well

and if some people went crazy for it could just be because whatever they had before was slower than that

So how much much write speed will drop if you use your SD extreme drive in a USB 2.0?
I just did a benchmark report on my samsung drive. here it is. strange, because i don't get that 60mb/s!!

 

[mcnumpty23]

no theres a very wide gap between flash drives i did a lot of looking before getting the sandisk extreme

thats when i noticed if they dont clearly give a read and write speed to look a lot more carefully at the drive--if your drive can do really good read and write

you are going to shout about it not just say up to xx speed with out giving the write speed as well

and if some people went crazy for it could just be because whatever they had before was slower than that

So how much much write speed will drop if you use your SD extreme drive in a USB 2.0?
I just did a benchmark report on my samsung drive. here it is. strange, because i don't get that 60mb/s!!

Not at home but will try it in a USB 2 port for you once I get home in an hour or 2

 

[helpstar]

try transferring a large file, small files won´t be as fast but still a lot faster than with USB2.0

60MB/s is a sequential write performance, which in real life you will not achieve

 

[mcnumpty23]

ok so tested with 1 very large file to see the max speed a lot of small files would be a bit slower obviously but just wanted to compare different ports

copied 41gb pcv file from flash drive to m2

constant straight line at 247MBs for motherboard usb 3.0

constant straight line 242MBs for startech usb 3.0 add in card

constant straight line of 42MBs for motherboard usb 2.0

so thats why we have usb 3.0 almost 6x the speed of usb 2.0 and this isnt the fastest usb 3.0 drive money can buy

 

[pkim1230]

ok so tested with 1 very large file to see the max speed a lot of small files would be a bit slower obviously but just wanted to compare different ports

copied 41gb pcv file from flash drive to m2

constant straight line at 247MBs for motherboard usb 3.0

constant straight line 242MBs for startech usb 3.0 add in card

constant straight line of 42MBs for motherboard usb 2.0

so thats why we have usb 3.0 almost 6x the speed of usb 2.0 and this isnt the fastest usb 3.0 drive money can buy

what's m2? is it an ssd you have?
also, isn't that read speed that you just tested? i think you tested the read speed of the flash drive, and write speed of the ssd.
shouldn't you move the file INTO the flash drive to test its write speed?
thanks for all the replies. i'm less dissapointed in my flash drive now. i accept my fate.

 

[helpstar]

m.2 is the latest standard of expansion cards like SSDs
https://en.wikipedia.org/wiki/M.2

yes, this is the reading speed of the flash drive

 

[mcnumpty23]

yes i only tested the read speed to show the difference between usb 2.0 and 3.0 for you

i can also test the write speed if you want but its just going to show the same thing--ie usb 3.0 is much faster provided you have something attached to it thats fast enough to use it

and m2 as said is the latest standard comes in sata or pci-e

pci-e x4 the fastest m2 drives are roughly 6x faster than a sata ssd in read and roughly 4 or 5 times faster in write

 

[USAFRet]

I'm not interested in special program benchmarks.
I just want the maximum write speed when I move files into my flash drive.
Is 30mb/s the best it can do? What do I have to do to achieve the 80mb/s write speed? Buy a new motherboard with built in USB 3.0? Is my PC hard drive bottlenecking the write speed of the flash drive?

It is simply due to being a flash drive. They are slower.

I have an external 4 bay USB 3.0 HDD enclosure
I also have a USB 3.0 USB stick.

writing to a HDD in the 3.0 enclosure is miles faster than writing the same file to the USB 3.0 stick.