Mixing RAM Voltages.

Tradesman1

Legenda in Aeternum
There are still a number of 1600 sets that call for 1.65 (normally older), in many cases it's do to using lower end memory chips that are probably more suited to being used in1333 or 1066 sticks. 1.65 is safe at 1600 but I don't advocate it. About 95+ % of all 1600 sticks, even low CL, high performance DRAM runs at 1.5 or less