内存 = 'internal memory' (RAM); 条 = 'strip / stick'. Literally 'memory stick' - a vivid description of the long thin DIMM module you plug into a motherboard slot.
usage
The measure word is 根 ('stick/strand'), matching the 条 in the name: 一根内存条. Compare 内存 alone, which just means 'RAM' (capacity, e.g. 16G 内存).
