SK Hynix HMA81GS6DJR8N-XN 8GB DDR4 PC4-3200AA-SE1-11 for XPS 9700 9500 X1 Carbon Extreme Gen 3 Alienware 51M R2 Asus Laptop (8GB DDR4 PC4-3200AA) at Amazon.com
SK HYNIX 8GB 2X4GB DDR4 PC4-21300 2666MHZ 1RX16 CL17 Memory KIT HMA851S6CJR6N-VK at Amazon.com