The L55 uses an old but still very capable processor, the Core i3-5005U. This is a four year old CPU with two cores, four threads, a 2GHz frequency, 3MB cache and a 15W TDP. Its Intel HD Graphics 5500 is still capable of driving two 4K monitors and its average Passmark score of 2909 is decent.
That’s paired with 8GB of RAM (single slot), a 256GB M.2 SSD and an Intel AC3165 wireless chip which provides wireless connectivity (Bluetooth 4.2 and 802.11ac). Unlike the M1, the L55 gives you the option to add an extra SATA-based 2.5-inch drive, either a hard disk or SSD.