USB3.0 key in laptop built-in USB2.0 ports: 8.1MB/s Write, 31.6MB/s Read. USB2.0 key in GMYLE BC628 adapter: 2.9MB/s Write, 12.8MB/s Read. USB2.0 key in laptop built-in USB2.0 ports: 2.7MB/s Write, 12.3MB/s Read. I can't say I'm impressed with the GMYLE adapter. I've bought another ExpressCard to test (NEC-based), hopefully it'll be of better quality.Ĭomparative BlackMagic tests (max values observed) on my SandyBridge Latitude E6220: Physical connection of USB devices is extremely poor and feels very loose. 120.57KB 3 downloads NB: I bought a supposingly genuine GMYLE ExpressCard for peanuts on Amazon. The BC628 certainly works up to Yosemite 10.10.5 under which it shows 2 x controllers in SysProfiler->USB: 68.03KB 2 downloads Under El Capitan 10.11.4 (the version I run), no controllers get displayed in SysProfiler but the card does work with USB2.0 and USB3.0 devices (I tested with USB keys of both types). This actually seems to work OOB (so to speak) with Generic USB3.0 kext (I used Rehabman's latest). The hard drive just cannot get enough power from the card to spin up (5400 rpm or 7200 rpm). But if it is bus-powered external Hard Drive. So if I connect a USB3 thumb drive.Įxternal USB3 hard drive which has its own 5V/2A adapter, it is still OK. 19.96KB 3 downloads It works same as Express/54 above, But only one issue to be aware, it seems inside the card, it use some cheap D/A converter. 
I also found and tested NEC uPD720202 chip based Express/34 because Levono T410, T420 only have Express/34 slot. Download my GenericUSBXHCI.kext: 112.42KB 212 downloads (or ). It does not matter the ExpressCard slot is 1x or 2x. And uPD720202 seems more stable for hot swapping than ASMedia 1042! I read somewhere that ExpressCard can only reach 2.5Gbps as maximum bandwidth.
I preferred ExpressCard 54 in X201, it just fills in all gaps, it seems more steady to plugin and out USB device with it.
The 34mm version uses a Fresco Logic chipset and the latest drivers. I am not sure, ExpressCard slot on X201 is version 1.0 or 2.0, or above cards are designed as 1x ExpressCard.Ĭheapest USB 3.0 flush expresscard out. You can install it from Source Project (search Google) I got 2.5Gbps, which is pretty good comparing with USB2.0 480Mbps. 2 x USB3.0 ExpressCard working on X201 with Mavericks: 1) GMYLE BC628 34mm USB3.0 Adapter (ASMedia 1042 chipset) 2) AKE BC398 54mm USB3.0 Adapter (NEC Renesas uPD720202 chipset) GenericUSBXHCI.kext supports both.
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