Tested write three boxes Nikon (D3, D800 and D4S), this card is broadly equivalent to my Lexar 64GB 800x, well above my Sandisk Extreme older generation, and quite close to a SanDisk Extreme Pro 16GB. Sum all, all this confirms the advertised speeds on the cards.
On the D4S fast burst mode (11 frames / second 14bit lossless compression NEF), the rythmpe pictures begins to weaken to the 50th in the series. Who needs more? ... And the D4S can we use XQD cards that are planned for very long bursts like this ... but overpriced.
I did not test driven on the playback speed, but the transfers are very fast via my internal card reader USB3 (Icy Box IB 868). It is much more comfortable and enjoyable on, but the only real reason to buy this type of card is the writing speed, far more than reading.
Excellent product therefore.
