Most helpful critical review
14 of 14 people found the following review helpful
BEWARE: This adapter uses USB, NOT PCIe signaling!
on May 1, 2011
I originally bought this adapter thinking that it would be super fast by virtue of its use of the ExpressCard slot. What I did not realize was that ExpressCard does NOT mean PCI Express signaling! The ExpressCard specification specifies pins that can be used by a device to connect via USB, and that's exactly what this card reader does. Sure, it works fine, but you will NOT get the full speed out of higher end SDHC or SDXC cards (since you're limited the USB 2.0's bandwidth maximum (factoring in protocol and driver overhead, that's realistically around 35MB/s, though in my tsting I was never able to get more than around 28MB/s with an SDHC card rated at 50MB/s read speed)).