831762-001 831762-601 For HP Elitebook 820 G3 I5-6300U Laptop Motherboard 6050a2892301-mb-a01 DDR4 Notebook Mainboard - AliExpress
HP ProBook 640 G2 – i5-6300U @2.40GHz | 8Gb DDR4 | 256Gb SSD | Without OS | IRT
Refurbished: HP Grade A Compaq Pro 6300 Tower, Intel Core i5-3470 3.20 GHz (up to 3.60 GHz), 16 GB DDR3, 2 TB HDD, DVDRW, Intel HD Graphics 2500, Windows 10 Pro (English / Spanish), 1 Year Warranty - Newegg.com