SiSoft Sandra Max 3
Getting straight into the Sandra benchmarks we find that both the OCZ and Corsair PC4000 modules were capable of being able to break the 6000/6000 barrier. Kingmax wasn't far behind with an overclock of 250MHz and while the Transcend memory was able to achieve quite a high overclock, its speeds still weren't the greatest due to the cheaper design of the modules.
Crucial has trouble keeping up with a lot of the other modules due to them just having that extra speed. As you can see you can get quite an increase when moving from PC3500 memory.