what is memory clock core clock
Core Clock. The clock speed of the graphics processor on the card. Video cards have two clock speeds of interest, the memory clock, and the core clock. The core clock is the speed at which the graphics processor on the card operatores. The clock speed of a chip, combined with the number/configuration of the pipelines in the chip, give a pretty accurate picture of what the performance of the chip will be.
render back-ends) and core clock. Amount of shaders is not a part of the equation. Memory clock and texture fillrate are not related at all. Memory clock is the frequency the onboard memory chips' I/O bus operates. Texture fillrate is governed by core clock and the width of the texture mapping unit.