We already tested our Phenom II X6 processor with system memory working at different frequencies but we didn’t have modules capable of working at 2000 MHz such as we have now. So, we will take the old results and add the results of the G.Skill F3-16000CL7D-4GBFLS kit to them.
First we run our synthetic benchmarks of bandwidth and latency.
The increased frequency helps raise the practical memory bandwidth and lower its latency. We don’t see anything unexpected here: DDR3-2000 is about 11% faster than DDR3-1666 in terms of read speed and its latency is 9% better.
However, we know that differences in memory subsystem parameters may be smoothed out in real-life applications and complex tests by the CPU's cache. So what will we see?
Indeed, DDR3-2000 doesn't provide big performance benefits in real applications. Its average advantage over DDR2-1667 with the same timings is a mere 1-2%.