General Knoppix support for those who've read the FAQ at the Wiki
A-Tech 8GB DDR3 1600 PC3-12800 Laptop SODIMM 204-Pin Memory RAM PC3L DDR3L 1x 8G
$13.99
Crucial DDR3L 16GB 1600 2x 8GB PC3-12800 Laptop SODIMM Memory RAM PC3 16G DDR3
$21.50
HyperX FURY DDR3 8GB 16GB 32GB 1600 MHz PC3-12800 Desktop RAM Memory DIMM 240pin
$14.50
Crucial DDR3L 16GB 1600 2x 8GB PC3-12800 Laptop SODIMM Memory RAM PC3 16G DDR3
$13.50
Lot of 19 16GB PC4-2133P 2400T 2666V 3200AA DDR4 Desktop Computer RAM/MEMORY
$299.99
Crucial 16GB (2x 8GB) Kit DDR3L 1600MHz PC3-12800 UDIMM Desktop 240-Pin CL11 RAM
$22.85
HyperX FURY RAM DDR4 16GB 8GB 32GB 4GB 3200 2666 2400 2133 Desktop Memory DIMM
$9.64
Samsung 16GB 2Rx4 PC4-2400 RDIMM DDR4-19200 ECC REG Registered Server Memory RAM
$20.99
Samsung PC4-19200 PC4 2400T 32GB DDR4 RAM Server Memory
$79.99
Samsung 64GB 4DRx4 PC4-2400 LRDIMM DDR4-19200 ECC Load Reduced Server Memory RAM
$71.99