Question: PCIE Expansion Card Chipsets with UASP for Windows 7

I marked my other question thread on PCIE solved. I am posting this new thread on a question on the chipsets for the expansion cards. I am going to be buying a PCIE expansion card to add more USB 3.0 ports to my motherboard, and I was thinking of a PCIE x4 expansion card so that it has enough bandwidth to run mutliple USB 3.0 or USB 3.1 devices.

But while shopping on Amazon for a card I discovered that the Asmedia chipset drivers do not support UASP for Windows 7. I know that the Renesas chipset drivers do support UASP for Windows 7, but there aren't many good PCIE expansion cards I could find with those chipsets. And I seen two people (me and someone else) experience file corruption with Renesas chipset drivers, so I may avoid them all together.

So my questions are (but please read the above before answering):

1) What other chipsets support UASP on Windows 7?

2) How much of a performance penalty would I have (I mean how much slower), if I buy a card, like an Asmedia chipset for Windows 7, where Asmedia doesn't support UASP?

I guess I can see why nobody responded. I don't know if they understood my question or why I was a bit confused. While searching on Amazon, I saw quite a few Asmedia chipset cards that were listed as UASP not supported under Windows 7. And I wanted to try to get UASP support for highest performance. I didn't realize that there were any Asmedia chipset cards that supported it, and a very outdated Wikipedia article said the same thing. So that is where my confusion came from, and I understand now why nobody responded.

I ended up buying a couple Renesas chipset cards (and hope I don't have the data corruption problems I saw before with that chipset), but I may end up buying a cheap Asmedia ASM1142 chipset card. I finally discovered that this card, does support UASP and 10 gbps USB 3.1 Gen 2 on the Windows 7 operating system and this may be the best bet for a Windows 7 upgrade of your USB ports.

From what I been researching, what they advertise as USB 3.1 Gen 1 is just USB 3.0. They just renamed it. If you want "true" USB 3.1 then you need to get USB 3.1 Gen 2.

I am providing all the above information for anyone else who needs it.

Maybe that you are reading a few out of date articles on the matter(?) - I found an Asmedia 1053E that supports UASP.
- be sure to purchase an expansion card with a good power supply connection, if youve already had problems with data corruption.
- make sure the s/w drivers are supplied with the card as Windows 7 does not have native support for UASP.

USB 3.1 has a different connector (USB Type-C) compared to USB 3/2/1, so make sure you know what you are buying before you purchase, or you'll wind up buying additional adaptor leads.

UASP stands for USB Attached SCSI Protocol. It allows for faster read/write data speeds to and from storage devices.


I'm curious. As I haven't seen any USB device that takes advantage of a fast USB 3.x communication, what device are you connecting to your USB 3.x that is faster then a 3.0 (5G bps or 625M Bps)?