« Reply #12 on: August 31, 2012, 05:44:14 AM »
I have SanDisk 16GB 400X UDMA (60mb/s), 600X 16GB UDMA (90mb/s) and the Lexar 64GB 1000X UDMA7 (145mb/s) ... after the initial burst rate (at 8fps) the number of shots I can take in a stretch with 1000X UDMA7 card is much more than the other two cards. Conclusion: 7D with firmware v2 gives better burst rates with a 1000X UDMA7 CF card than the other CF cards
what means "much" more ?
It means after the 7D buffer fills up at the initial 8fps burst mode:
with 400X UDMA (60mb/s) I get 2 more shots before I have to wait for 2 seconds for the next shot
with 600X UDMA (90mb/s) I get 3 to 4 more shots before I have to wait for less than 2 seconds for the next shot
with 1000X UDMA (145mb/s) I get 7 more shots, before I have to wait for the next shot for 1 second
These are approximate numbers based on my last week's photos taken of a running Oryx in the desert.

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5D MK III, 16-35/2.8 L II, 24-70/2.8 VC, 24-105/4 L IS, 70-200/2.8 L IS II, 100/2.8 L IS, 40/2.8, 50/1.4, 85/1.8, 150-500 OS, 600EX-RTx2, ST-E3-RT, Rokinon 24/3.5 T-S, D7100+18-300 VR, YN568EX, 055CXPRO4+468MGRC2, 190CXPRO4+322RC2, Gorillapod Focus+496RC2, CamRanger, B+W filters, Konova K3/31.5 etc