Speed of a USB 3.0 drive on a USB 2.0 port?

[jonapom]

My PC has USB 2.0.

I would like to upgrade my USB 2.0 4GB flash drive which I benchmarked to write at only 4.4MB/s. But I see that the max write speed of other USB 2.0 flash drives is below 15MB/s (the USB 2.0 standard allows for a max transfer speed of 60MB/s). If I bought a USB 3.0 flash drive with a write speed of say 30MB/s, would it work at that speed in my PC has USB 2.0?

 

[Mattios]

A USB 3.0 device will work at the maximum speeds of USB 2.0 when plugged in to a 2.0 port. Your USB 3.0 drive should operate as quickly as is possible for USB 2.0, and obviously faster if you get/find a USB 3.0 port.

 

[skitszo]

http://www.newegg.com/Product/Product.aspx?Item=N82E16815166026&cm_re=pcie_usb_3.0_card-_-15-166-026-_-Product

i don't know whazt the best brands are for this but if you really wanted faster and you have an available PCIe lane...

 

[jonapom]

After extensive research I came about the following chart provided by Transcend. Contrary to the other answers, the speeds rated for a USB 3.0 flash drive will be lower when using them on a USB 2.0 port even when not exceeding the USB 2.0 standard.

Maximum Speed Comparison for the following Transcend product numbers:
			USB 2.0 	USB 3.0
Product Number 		Read 	Write 	Read 	Write
TS4GJF760 		32MB/s 	5MB/s 	55MB/s 	5MB/s
TS8GJF760 		32MB/s 	5MB/s 	55MB/s 	5MB/s
TS16GJF760 		32MB/s 	12MB/s 	75MB/s 	12MB/s
TS32GJF760 		32MB/s 	18MB/s 	70MB/s 	18MB/s
TS64GJF760 		32MB/s 	25MB/s 	85MB/s 	25MB/s
TS128GJF760 		32MB/s 	25MB/s 	70MB/s 	55MB/s

 

[skitszo]

..... who said you'd get 3.0 speed out of a 2.0 port.... i'm lost.