M.2 drive isn't being recognized

[Mohskii]

So I recently built my first pc and everything is working properly, except my m.2 drive. It's not popping up in bios or windows. I am 100 percent sure I installed it properly. Does anyone know how I can get it to work properly. Thanks for any help!
Specs:
Intel Core i7-6800K 3.4GHz 6-Core Processor
Corsair H110 94.0 CFM Liquid CPU Cooler
Gigabyte GA-X99-Ultra Gaming ATX LGA2011-3 Motherboard
G.Skill Ripjaws V Series 32GB (2 x 16GB) DDR4-2133 Memory
Crucial MX300 1.1TB M.2-2280 Solid State Drive
Toshiba X300 4TB 3.5" 7200RPM Internal Hard Drive
MSI GeForce GTX 1080 8GB GAMING X 8G Video Card
Phanteks ECLIPSE P400 ATX Mid Tower Case
EVGA SuperNOVA NEX 750W 80+ Gold Certified Fully-Modular ATX Power Supply

 

[Paul NZ]

Was the toshiba unplugged when you installed windows on it?? It can cause probs if you didnt