Kingston's HyperX series represents modules that exceed the ratings of standard parts, and its PC3-11000 kit is actually rated for operation at 1375 MHz. The rating is still close enough to the 1333 MHz "standard" data rate for these to be considered "enhanced DDR3-1333," however.
Part number KHX11000D3LLK2/2G provides a dual-channel kit of two 1 GB modules with blue heat spreaders, rated at 7-7-7-20 timing and 1.70 volts. The nonstandard voltage requires manual configuration in BIOS, and the modules default to a slower 533 MHz (DDR3-1066) in order to assure boot capability at a motherboard's default 1.50 volts.
In fact, a DDR3-1333 SPD value isn't even found in the HyperX SPD table, the highest 1.50 volt setting being 609 MHz at CAS 8. Yet, because this RAM defaults to rated timings at a slower clock speed, manual configuration is as easy as changing the speed and voltage in motherboard BIOS.
A 457 MHz SPD value is also able to be automatically configured for DDR3-800 operation when FSB-800 processors are used, while the 533 MHz DDR3-1066 value works for FSB-1066, FSB-1333 and FSB-1600 processors.
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