Corsair’s DOMINATOR Twin2X2048-8888C4DF runs at 1111 MHz with timings of 4-4-4-12.  They have Corsair’s newly designed heatspreaders, and the DOMINATOR Airflow fan bracket is optional.  Thanks to this efficient cooling scheme, 1244 MHz at 4-4-4-12 is reachable, if the voltage is bumped to 2.5V.  Be prepared to pay for this performance though, these modules will set you back more than $700.  Read on at PC Stats for more reasons to pay that price tag.
“The 2GB Corsair DOMINATOR Twin2X2048-8888C4DF kit is the companies current flagship DDR-2 memory part…. and boy is it fast! The enthusiast game of overclocking computer hardware has become a very mainstream affair. Manufacturers use high end computer hardware to impress us, to dazzle us with fast numbers, jaw dropping features, and luxury options that grab everyone’s attention. It takes a special kind of computer enthusiast to recognize that one must look past the flash, the verb-ladden names, and stare right into the heart of high speed low latency memory. The latter is quite important, and quite difficult to achieve.”

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