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Yeah, the description says it’s a “true” PCIe card (I’ve read the description just now). But the slot itself exposes both PCIe and USB, and early “ExpressCard SSDs” used the latter making them no faster than USB flash drives. Bummer.

I’m kind of dumb when it comes to ExpressCard form factor. What’s the visual “tell” which distinguishes an ExpressCard for PCIe versus one for USB?
 
Wow. I never realized the ExpressCard standard included on-the-fly (switching) support between the system’s PCIe and USB buses. That’s really interesting.
It’s much simpler. The slot has different pins for PCIe and USB, so it just depends on what pins the card connects to. The ExpressCard-to-PCIe adapter I have also exposes a USB 2.0 port.

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I was looking for a MacBook Air 1370 Iparts) last year and saw one for $9,999 USD
Obviously, I questioned the seller, whom placed the MacBook Air,
they sell them occasionally and do not want to lose the good search position on ebay.
 

Oooooh-kaaaay... At least it looks funny.
So I got one of these fancy ExpressCard to dual CF adapters today. It uses a JMicron JMB361 chip which has two SATA II ports and one PATA port. Only the SATA II ports work in Mac OS X, which explains why no CF card ever shows up... they're hanging off the PATA port, of course. Bummer. Having both cards on one PATA channel also means a RAID 0 won't be faster than a single card, which explains why the Windows driver doesn't do RAID 0 (only non-RAID, JBOD and RAID 1).

Back to Amazon it goes. :(
 
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