This 8GB RAM is 100% compatible with the Lenovo IdeaPad G50-80 (80E5) (i3/i5/i7 4th Gen).

What memory configurations are possible?
The IdeaPad G50-80 models vary in specifications. Models with Celeron N2830 and Celeron N3530 CPUs have one memory slot and can be upgraded to a maximum of 8GB. The compatible 4GB and 8GB modules can be found under the item: IdeaPad G50-80 (80E5) (N2830/N3530).

Models with Celeron 3205U, Celeron 2957U, i3-4030U, i5-4210U, and i7-4510U CPUs have two memory slots and can be upgraded to a maximum of 16GB. The compatible 4GB and 8GB modules can be found under the item: IdeaPad G50-80 (80E5) (i3/i5/i7 4th Gen).

Models with i3-5005U, i3-5010U, i5-5200U, i5-5257U, and i7-5500U have two memory slots and can be upgraded to a maximum of 32GB. The compatible 4GB, 8GB, and 16GB modules can be found under the item: IdeaPad G50-80 (80E5) (i3/i5/i7 5th Gen).