Being successful in digital photography isn’t just about which DSLR you spend your money on: it’s the memory card you put inside it, too. Over the past few weeks, we’ve been testing the latest high-capacity UDMA 6 capable CompactFlash cards in up to 64GB sizes from SanDisk, PhotoFast and Lexar, intended for the most demanding of professional photographers. We didn’t stop at spec-sheet theory, either; to get the most out of these high-speed cards, we put them through their paces with the Canon EOS 1D Mark IV and top-spec computers to gather the real world performance figures, including an unprecedented in-camera write speed pushing the limit to 58MB/s with the Mark IV. Read on to find out which card tops the chart, and how the newcomer PhotoFast G-Monster holds up against the market leaders.

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