SIIG's DP USB 3.0 4-Port PCIe i/e - Value is a high performance adapter card instantly adds four USB 3.0 ports (3 external & 1 internal) to your PCIe-enabled desktop computer, immediately enhancing your existing system with the latest USB 3.0 technology. It delivers ultra-fast USB 3.0 data transfer rates of up to 5Gb/s (10 times faster than USB 2.0) for connecting a wide variety of high-bandwidth USB 3.0 devices such as external hard disks, high resolution webcam, video surveillance cameras, digital video cameras, multi-channel audio and more. It is backward compatible with USB 2.0/1.1 devices and supports per port over-current protection. This dual profile PCIe i/e adapter card works with full height and low profile chassis system with the included bracket providing the utmost flexibility in system chassis installation.
This review is from: SIIG Dual Profile PCI Express (PCIe) 4-Port SuperSpeed USB 3.0 Adapter Model JU-P40611-S1
Pros: 4 independent usb 3.0 ports. meaning you will get full speed on each port directly connected to an item. this is as apposed to other boards I have tried that used a shared hub on the board which caused all ports to share bandwidth.
Cons: one inter usb 3.0 plug. I have no need for an internals usb 3.0 so it is useless to me and effectively makes this a 3 port board for my use.
Other Thoughts: I run 3 usb 3.0 drives using this card, I have the drives setup as a raid 5, in operation all the drives operate at full bandwidth pushing 90-100 MB/s from each drive simultaneously, this confirms the independent operation of each port.
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