Nope. Your ram will run just the way it's meant to at 667MHz. The 800MHz "standard" is what the motherboard's maximum is without over clocking.Needle said:Let's say I buy 667 MHZ DDR2 ram. My motherboard, however, has a DDR2 800 standard. Does that mean my ram is too slow for my motherboard, does it work anyway, does it affect ram performance in any way, etc?