can i use ddr3l ram in ddr3 slot

1) Yes, it will work. 2) Yes, it will recognize and address them properly, in fact according to Acer's X552VL Specifications page, all X552VL models ship with DDR3L memory installed. If you had problems it would be trying to go the other way, a computer that has DDR3L slots is in general not compatible with standard DDR3 RAM. rtp slot tokyo88