So you can record 1920x1080 with no dropped frames on the Transcend 32?
I can record 1920x1080 24fps with both of my new Transcend 64gb 1000x but there's a little trick. The maximum sustainable speed I get is 82,9 MB/s which is just enough for recording without dropping frames.
When you put these cards on the camera and try to do 1080 24 right away they just won't. Not even recording several files. But, if you record a couple GBs, I go all the way up to 4GB, in 1920x960 and them you switch to 1080 they are just fine after that. I've recorded several 16GB files without a problem. If you switch the camera on/off, you take out the card or you don't record for a couple minutes you might have to warm them up again.
Of course they don't do 1080p 25fps because they max out at 82,9 MB/s. My cards are formated in exFAT (Quick format, 128 bytes units). Global Draw On/Off doesn't seen to affect much (~0,2 MB/s in the worst case scenario, which for these cards you should watch out). The benchmark doesn't show these speeds, though.
My guess is that they need to heat up to work to the peak. So, AndreasK, I hope it works for you too. Let me know how it goes!
EDIT: I'm using last lourenco build (22nd May).