X399 OC Guide | Page 4

Step 2: Enter “Advanced Frequency Settings” Change your “CPU Clock Ratio” to “40.00”. A CPU clock ratio of 40 multiplied by 100 which is our default “Host Clock Value” gives you a frequency of 4000 MHz. The CPU comes with a default CPU frequency of 3400 MHz, which means that it has a default “CPU Clock Ratio” of “37.00” and a default“Host Clock Value” of “100”. Different from Intel, “CPU Clock Ratio” can be adjusted in increments of 0.25x instead of 1.0x. For example “CPU Clock Ratios” of 37.25, 37.50, 37.75 etc are possible. 3