Warning W2521 - The AGP bus speed is too high. The AGP bus speed should not be increased over 75MHz (base clock). Most AGP cards wonΓÇÖt work or will default to 1x mode.
Warning W2521 - The AGP bus speed is too high. The AGP bus speed should not be increased over 75MHz (base clock). Most AGP cards wonΓÇÖt work or will default to 1x mode.
Fix: Make sure the AGP/CLK selector (if present in the BIOS) is 2x for 133MHz or 2/3 for 100MHz FSB. FSB speeds higher than the standard may result in AGP bus speeds way outside the specification.
For more information, please see the (FAQ).