RAM memory works at 1066MHz instead of 1333MHz

Thread Starter


Joined Nov 18, 2016

I hope this is the correct place to ask my question as I can't find the computing forum.

I have 4 sticks of 2GB DDR3 at 1333MHz, my processor supports it, my FSB is also 1333MHz, but the RAM works at less. I tried only with 2 sticks, I tried changing the slots, it always works at 1066MHz, both the task manager and CPU-Z show 1066MHz. The voltage is 1.5V.

Also my BUS speed is shown by CPU-Z to be 300MHz, while the rated is 1300MHz.

Can anyone please tell me why does this happen and how to solve it?