thanks for the answers, I've been looking in the BIOS and it doesn't have the option of Memory Remap or anything similar, the modules are 2x 2gb, it's all been since updating the BIOS to the latest version:( I updated it because I had compatibility problems with PCI express cards. If I could go back to the previous BIOS :$$ I didn't make a copy of the rom

Yo me tuve que pillar una tarjeta de sonido… mi ASRock venia mal, y tonto de mi, anule la garantia haciendo una chapuza.(estos de Alternate me la dieron de RMA seguro, y me la colaron) En fin, que todo tiene solucion si la llevas a la tienda, que te la cambien y listo. Si no te vas a volver loco, yo es que no sabes la de vueltas que di, joder. Saludos!!