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DDR3-1333 Speed and Latency Shootout

OCZ PC3-10666 ReaperX HPC Enhanced Bandwidth

Anyone impressed by the fact that OCZ's medium-performance Platinum Edition is rated at the same timings of some competitor's high-end parts will be even more impressed by the rated timings of its ReaperX series. Equipped with a twin-heatpipe radiator, each ReaperX module is rated for a 1333 MHz data rate at CAS 6.

But while CAS 6 might sound impressive, these are no ordinary CAS 6 timings. The full set of standard timings is 6-5-5-18, which is quicker than the 6-6-6-x timings normally associated with the "CAS 6" label. The elaborate cooling system comes into play here, as the recommended setting to reach 6-5-5-18 timings at DDR3-1333 is 1.85 volts.

So the builder must enter BIOS and manually configure the speed, latency and voltage in order to run ReaperX modules at rated performance levels. This is excusable for a module set that's marketed towards the "extreme performance" crowd who should be familiar with BIOS configuration, but might seem a bit daunting to new builders.

In fact, even at its 533 MHz SPD value (DDR3-1066), these part number OCZ3RPX1333EB2GK ReaperX modules use 6-5-5-20 rather than 6-5-5-18 timings, but at least the DDR3-1066 automatic configuration is provided to ease "first boot" stability prior to any manual BIOS changes.

Missing is any DDR3-1333 SPD value, and we instead find an odd DDR3-1244 value of 622 MHz clock speed and a DDR3-1422 value of 711 MHz. None of our boards defaulted to DDR3-1422 timings at DDR3-1333 clock speeds when using an FSB-1333 processor, but instead the ReaperX modules always dropped to DDR2-1066 via automatic configuration. CPU-Z indicates that this may be because the modules are electronically labeled as PC3-8500 rather than PC3-10700.