A snippet from X-bit Labs.. DDR latency on DDR2 sticks coming soon -

Didn't take longOCZ Unveils DDR2 Modules with CL3 Latencies
OCZ Technology, a leading maker of memory modules for enthusiasts, said Wednesday it had managed to shrink latencies of its high-speed DDR2 memory modules to timings that are normal for DDR memory. Lowered latencies on standard speed memory mean that users will be able to enjoy increased performance without overclocking any component.
“It is much easier to document raw clock speed and its theoretical bandwidth than the performance increase achieved by low access latencies; however, the latter is what really matters for the ultimate gaming and multimedia performance,” said Dr. Michael Schuette, vice president of technology development at OCZ Technology.
OCZ’s PC2-5400 EL DDR2 Platinum Edition XTC memory modules are capable of working at 667MHz with CL3-3-3-15 timings, unbelievably low latency settings for modules at such a high-speed. But the memory modules have to run at 2.1V voltage setting, which exceeds standard voltage for DDR2 chips by 0.3V, a significant difference.
The new modules also feature XTC heat-spreaders, honeycomb-like radiators made of aluminum, which dissipates heat rather quickly. OCZ claims that honey-comb like design has higher surface area than conventional solid heat-spreaders, while the perforations allow convection to even more effectively reduce heat.
The new memory product will be available in 512MB modules and 1GB dual-channel memory kits.
“Memory access latencies are the pivotal factor for system performance. The new PC2-5400 EL DDR2 Platinum Edition XTC fills this void by offering faster access times than even the lowest latency DDR400 modules in the market,” Mr. Schuette added.
