The Hyper-X RAM comes with Kingston's lifetime warranty and free tech support if you need it. To make sure that things are stable at 4-4-4-12 timings, you need to set vRAM to 2.0v – bear in mind that my DFI motherboard reverts to 1.9v after a BIOS reset. While that's fine for the SPD setting of 5-5-5-15 @ 667MHz, it doesn't cut it at higher speeds. A limitation in my testing was the inability of the motherboard to run FSBs higher than 800MHz (thus the lack of frequency overclocking).



Link: GideonTech