The popular 3DMark benchmark of the current and previous versions produces very similar results. Fast memory is always a boost for such gaming tests. It means that if you are assembling a gaming platform, you may want to choose your memory very carefully.
The CPU test from 3DMark03 shows it clearly, too. The Pentium 4 3.0GHz platform with DDR400 and with the minimal timings is always faster than the Pentium 4 3.2GHz one, but with less aggressive timings. Once again, we would like to note the fact that RAS# to CAS# Delay and RAS# Precharge parameters affect the system performance more than CAS Latency does.