Is the i5 7640x part of the 1151 socket?

[Finster_1]

I have just got parts for my computer but I can't fit the CPU in the mobo.

 

[Bob125484]

I have just got parts for my computer but I can't fit the CPU in the mobo.

you could easily google it and it will say LGA 2066. What motherboard did you buy?
https://www.intel.com/content/www/us/en/products/processors/core/x-series/i5-7640x.html

 

[Dark Lord of Tech]

Intel Core i5-7640X Kaby Lake-X Quad-Core 4.0 GHz LGA 2066 112W BX80677I57640X Desktop Processor
https://ark.intel.com/products/121500/Intel-Core-i5-7640X-X-series-Processor-6M-Cache-up-to-4_20-GHz

You need a X299 board.