Question DDR 400MHZ/PC3200 512MB

Mar 4, 2019
1
0
10
I INSTALLED 4 OF THESE A-TECH MEMORY CARDS (512MB EA) IN A SONY VGC-RA820G DESKTOP COMPUTER AND NOW MY SCREEN SHOWS 2.5 G OF TOTAL MEMORY. HOW IS THAT POSSIBLE? BTW, EVERYTHING RUNS FINE, OR SO IT APPEARS.