Peter Jason wrote:
> I have Win7 ultimate, an i7CPU and a GA-X58A-UD7 motherboard.
> The motherboard has 3 USB3 connections:
> 1/ The four at the back panel called "USB 3.0/2.0 port".
> 2/ Two extra on a plug-in USB 3.0 PCI-e card (Shintaro USB3.0, 2-port
> PCIe SHUSB3PCIE)
> 3/ Two extra from a small socket at the very bottom of the motherboard
> called "USB headers "F_USB1/F_USB2/F_USB3"
> I need to know if these are all equivalent in performance (speed) when
> using a flash drive for images and video.
> Is it OK to use the HDD performance checkers (such as HD-tune Pro) to
> determine the fastest port and the best Flash Drive?
You can do "sustained read" testing if you want, as that doesn't
hurt the flash memory. Even the free version of HDTune (2.55) can
do that for you.
They make USB3 flash drives now, so if you want to benchmark,
try one of these. This one is expensive, at $179. http://www.newegg.com/Product/Produc...82E16820220584
"sequential reads were consistently between 185-195 MB/s and
sequential writes were consistently between 117-119 MB/s"
If you run a USB2 device on a USB3 port, expect USB2 speeds.
In the low to mid 30MB/sec range best case.
If you use a USB3 device on a USB3 port, then it can use
the set of pins that support higher speeds. The upper
limit (predicted value) is 336MB/sec or so, and no device
does that, just yet. The best value seen in storage devices
that I've heard of, is around 200MB/sec. Maybe the 336MB/sec
value will be unobtainable. Only time will tell.