Just wanted to know what this does. I have a ASRock K7VT4A Pro.
I'm gonna hazard a guess. We know CPU is "Central Processing Unit" and AGP is "Accelerated Graphics Port". Logically, CLK must be Cucumber Lemon Kumquat, which is a very rare hybrid fruit.
I'd assume CLK means clock, so it problably changes the FSB ratio between CPU and AGP. The manual should explain it.
A skew generally refers to a linear time delay (or negative time delay). Since data takes a finite amount of time to traverse the distance between CPU and FSB, one part may have to wait a certain amount of time (or a certain number of clock cycles) before expecting a response from the other.