No takze vysvetlenie mas v datasheete:
http://www.valueram.com/datasheets/KHX6400D2K2_1G.p df
Each module pair has been tested to run at DDR2
800MHz at low latency timing of 5-5-5-15 at 1.95V. The SPD is programmed to JEDEC standard
latency 667Mhz timing of 5-5-5-15 at 1.8V.
Takze podla SPD je to pamat DDR2 667 preto ti BIOS nastavi 667, ktora sa da pretaktovat na DDR2-800 ak nastavis rucne vyssiu freq, napatie, a casovanie.