Will 1333 DDR3 work to take the 920 in the 4ghz range? or do I have to have 1600 capable RAM to take it that high? I read somewhere that in order for bclk to go above 160ish it has to have 1600 RAM. Is this true or can I still take the bclk above 160 and just drop the multiplier on the RAM down to stay within 1333 range?