Can I replace my Lenovo Z51-70 CPU? It's an i7-5500U which is very bad at multitasking. Can I replace the processor or the motherboard with a higher processor? - Quora
For Lenovo Z51-70 W CPU I5-5200U RAM 4G Laptop Motherboard FRU:5B20J23835 | eBay
Inside Lenovo Z51-70 - disassembly, internal photos and upgrade options | LaptopMedia France