Knoppix reads my amount of RAM incorrectly

Knoppix reads the RAM on my Dell Inspiron 3700 laptop as about 48 when it's 64 and on my Dell GX1 desktop as about 48 when it's 64, and thus wants me to make a swap file, that's when I boot it off the cd. Can anyone help me with how to make it see the full 64 in each case?

Try the cheat code mem=??M replace the ?? with the amount of memory in the machine.