So, we tried to use them with different memory timings. Selecting a timings scheme, we were increasing the frequency of the module to the stability peak. The DIMM voltage was set to 2.75V.
And we got quite curious results:
These are the most liberal timings and PC4000 from OCZ notches the highest frequency. Strange as it might seem, it is accompanied by Corsair’s PC3700, although the latter is not supposed to work with such timings at all.
After lowering CAS Latency by half a clock, we see that Corsair TWINX512-3700 goes down, while the other modules are more indifferent to this change.
With reduced RAS# to CAS# Delay and RAS# Precharge, the maximum frequency of Corsair TWINX512-3700 drops even lower. This time we have one more sufferer: OCZ EL DDR PC-4000 does not make it to 500MHz frequency.
When the CAS Latency dropped to 2, Corsair’s PC3700 refused to work at frequencies of 400MHz and above. The other modules kept on working fine.