I added a Rosewill RC-505 PCI card to my W7 machine and am having mixed results, but slower across the board than I had hoped for.
I have a Barracuda 7200 RPM internal HDD and am transferring a lot of data to an Hitachi Touro 3TB external drive and the transfer rate is 26MB/s. Thats awfully slow. The Hitachi is supposed to be USB 3 capable but I've gotta wonder.
It has performed faster with other drives, but this one is sloooooooow.
More aboutadded rosewill speed slow
Does your card have the the latest firmware and your Win7 uses the latest driver?
You should able to move date around 65~120MB/s
What's you computer specs.
W7 64 bit AMD Phenom(tm) II X6 1065T Processor @2.9GHz FOXCONN 2A92 Motherboard 16GB memory