HP/Compaq Pavilion a900 Series Desktop Memory Upgrade Configurator - choose your Model:

A905
A910
A912
A913
A915
A920
A921
A922
A925 (DDR)
A925 (SDRAM)
A930
A935
A940
A941/A942/A960
A943/A947
A945
A962
A963/A983
A965
A972/A973