Intel Core i7-5775C 3.3GHz Broadwell LGA-1150 CPU Performance Overview
Amazon.com: MACHINIST H81 PRO Gaming Motherboard, Intel 4th Gen LGA 1150 PC Computer Motherboard (Micro ATX, PCIe 2.0, NGFF M.2, SATA 6Gb/s, Dual DDR3) Support Core i3/i5/i7, Xeon E3/V3, Celeron G Series
Can you upgrade the CPU on a £1,000 prebuilt gaming PC? - Quora