Freezing X270/X260/X250, Official fix (a bit LMAO though) : r/thinkpad
OFFTEK 2GB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad X250 (DDR3-12800) Laptop Memory at Amazon.com
16Gb (1X16Gb) Memory RAM Compatible with Lenovo Thinkpad X250 By CMS C57 - Computer Memory Solutions
Lenovo Thinkpad X250 12.5" Ultrabook Business Laptop Computer, Intel Dual-Core i5-5300U Up to 2.9GHz, 8GB RAM, 256GB SSD, WiFi, Bluetooth, USB 3.0, Windows 10 Professional (Reused) - Walmart.com