How to calculate the setting for BCLK with Core i7?

Question

Help me figure out the proper calculation for overclocking a Core i7.

Given that:

• the default maximum memory speed is 1333MHz,
• the motherboard supports up to 2200 MHz by overclocking, and
• it has a 2x memory multiplier as for Core i7 CPUs,

How do you calculate what setting BCLK should be for 1600 MHz and 2133 MHz?

Answer 1

Let's look into the frequency-clock structure of i3/5/7 systems:

First you have BCLK, which stands for base clock. And then you have the multiplier (for CPU). And then you have the multiplier (for ram).

Then, if you are using a i7-860, then the default setting would be below:

• BCLK = 133
• Multiplier = 21
• RAM multiplier = 10

which results in a cpu frequency of 2.8GHz and ram frequency of 1333MHz.

For example, if you are using ram rated at 1600MHz & You want to achieve a 4GHz clock, then you need to set the following...

• BCLK = 200
• Multiplier = 20
• RAM multiplier = 8

which gives you the above frequencies...