Hardware-One has posted a review on the RETAIL CARDEXpert 64MB DDR GF2 GTS. Here´s a snip:

Notwithstanding the various enhancements, one can't help but feel perturbed by the slower 6ns Hyundai DDR offering (HY5DV651622 0021A TC-G6), as opposed to the 5ns EliteMT DDR used in their beta board previewed by Tom's Hardware . You can refer to the specifications here link to Hyundai PDF datasheet). But in a nutshell, the DDR is rated at 166MHz (or 333MHz, in sampling both rising + falling clock cycles) or 6ns.

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