no - it's DDR "2", double rate....so it 1066 is doubled, and it will run at a 1:2 ratio...
Don't know about the decimals, but that's correct.The Q6600 runs at 1066 (266.5 fsb), the E6850 runs at 1333 (333.25 fsb).
1:1 with the q6600 would require ddr2 533, the E6850 would need ddr2 667.