If I’m to install any USB 3.0 expansion card that actually earns me a net gain of controllers suitable for benchmarking or serious storage, the card must have multiple USB 3.0 controllers. All of my PCIe x1 slots are version 1.0 and therefore unsuitable for USB 3.0, and if I make use of my only free PCIe 2.0 slot, my onboard USB 3.0 gets throttled down to PCIe 1.0 speeds. Third, my motherboard can be a cruel joke. Two solid-state drives will tear through that easily. Of course, as more USB 3.0 devices are added to a system, it becomes even easier to run out of USB 3.0 bandwidth since there is only 500MBps to pass around. More and more hard drives are being released that take advantage of the new platform, and that number will skyrocket once Intel releases chipsets that feature native USB 3.0 come April 2012. Second, you can never have enough USB 3.0 ports. USB 3.0 is rated for 640MBps (5Gbit/s) anyway plus the controllers are usually connected natively by PCIe 2.0 x1, so it makes no sense to limit yourself. With Gen1 slots, I’ve seen file transfers hit walls of 90MBps during write tests that were only ever alleviated by switching over to a PCIe 2.0 x1 slot (500MBps). First off, never under any circumstances limit a USB Controller to PCI Express 1.0 x1 bandwidth (250MBps). System: Windows® 2000 / XP / 2003 / Vista / Windows 7/Windows8.Considering just how many USB 3.0 devices I’ve found myself reviewing of late, there are a few lessons that I’ve picked up worth sharing.Hot-swapping feature allows you to connect / disconnect devices without powering down the system.5V/900mA power output to each USB 3.0 Port Data rate: Low-speed (1.5Mbps) / Full-speed (12Mbps) / High-speed (480Mbps) / Super-speed (5Gbps).Fully plug & play and hot plug compatible.Power output per USB3.0 interface: 5V/900mA (with PSU connected).Backward compatible with USB 2.0 and PCI Express 1.0.Compliant with Universal Serial Bus USB 3.0 Specification Revision 1.0.Compliant with PCI Express Specification Revision 2.0.
The ASM1042 USB 3.0 Host controller which enables a PCI Express equipped platform to interface with USB Super-Speed(5Gbps), High Speed(480Mbps), Full-Speed(12Mbps), and Low-Speed (1.5Mbps) devices, Users can easy to connect your Mass Storage, Printer, Scanner, Hub, Camera and any other USB Devices to used. PX1-U30-2A-1042 is a PCIe x1 2-port USB 3.0 Type-A USB Host Card with Asmedia ASM1042 Chipset.
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