Just got a Transcend 64GB 400x card with UDMA 7 and the VPG-20 spec, and it never surpasses 50% write buffer for the entire length of the card at 280mbps I-frame. Impressive. I recall the UDMA 6 or lower 400x cards from Transcend did not support 280mbps according to the compatibility list. Now I can proudly say that the UDMA 7 + VPG-20 Transcend cards can support 280mbps.

Thanks for the report Jack. Those cards look really affordable. I'll probably pick a couple up.