Here are the specs from the Olympus web site:


E-M5 Specifications
Product Product type Micro Four Thirds interchangeable lens system camera
Memory SD Memory Card*1 (SDHC, SDXC, UHS-I compatible, Eye-Fi Card compatible*2)
*1: Class 6 is recommended for Movie shooting.
*2: Not compatible with endless mode. Release time lag may be generated in actual use.
Sensor size 17.3 mm (H) x 13.0 mm (V)

And keep in mind UHS-I compatible doesn't mean it'll take advantage of it. They are likely making it clear that it will work still.

Though, based on this, it seems to be supported pretty well: http://www.imaging-resource.com/PROD.../omd-em5A6.HTM

Posted in another thread also...

The card I am using is the 64GB Centon SDXC Class 10.
Centon 64GB SDXC Memory Card

I purchased from Woot.com back in February.
It was priced at $59.60.

I have been able to shoot 19 continuous photos with this card
before the E-M5 calls it quits !!!

__________________
Pete...

Olympus OM-D E-M5 Black
M.Zuiko Digital ED 12-50mm EZ Black

...so....what should i upgrade to and buy next? I currently have the Transcend class10 16gb.

- buy the Sandisk Extreme 32gb class10 45mbps?

- or save 20-30 bux and get the cheaper Transcend class10 32gb?

Of course, I like saving money...but I also shoot a lot of video and appreciate possibly faster speeds.

Whatcha think?