Will a cheap PCI-E card deliver SATA III performance?


Apr 8, 2012
My motherboard (Gigabyte GA-770T-USB3: http://www.gigabyte.us/products/product-page.aspx?pid=3320#ov) has only SATA II and I'm considering buying a SATA III SSD such as a Mushkin Chronos 120G. Would a cheap PCI-E controller card such as this Highpoint Rocket 622: http://www.newegg.com/Product/Product.aspx?Item=N82E16816115073 actually deliver SATA III speeds? How about a raid0 with two 60G SSDs and this raid compatible version of the Highpoint: http://www.newegg.com/Product/Product.aspx?Item=N82E16816115075?

I run W7 and am looking for gaming performance and overall faster loading/booting.

Also, I just realized, this mobo has only 1 PCI-E 2.0 slot which is taken by my video card. So, this controller card would be plugged into a PCI-E x1 slot.

SATA III speeds are from 301MB/s to 600MB/s.
The Rocket 622 uses the Marvell 88SE9128 controller which has a data bandwidth of PCIe x1 at 5Gb/s (500MB/s).
You will get SATA III speeds using the Rocket 622, but you will not get the maximum advertised speeds of the SSD.

You need a PCIe x4 or x8 controller card to get maximum advertised speeds of a SATA III SSD.