HP EliteBook 840 G2 Laptop, Intel Core i5-5th Gen CPU, 8GB RAM, 500GB HDD, AMD Radeon R7 M260X Graphics, 14 inch Touchscreen, Windows 10 Pro
NOKOTION For HP Elitebook 840 G2 Laptop motherboard 14 Inch SR23X i5-5300U Radeon R7 M260X graphics card 6050A2637901-MB-A02 - AliExpress
Nokotion Laptop Motherboard For Hp Elitebook 840 G2 14 Inch Sr23x I5-5300u Radeon R7 M260x 6050a2637901-mb-a02 Main Board Works - Laptop Motherboard - AliExpress
AMD Radeon R7-260 review
HP EliteBook 840 G2 Laptop, Intel Core i5-5th Gen CPU, 8GB RAM, 500GB HDD, AMD Radeon R7 M260X Graphics, 14 inch Touchscreen, Windows 10 Pro
AMD Radeon R7 M260X - NotebookCheck.net Tech
NOKOTION For HP Elitebook 840 G2 Laptop motherboard 14 Inch SR23X i5-5300U Radeon R7 M260X graphics card 6050A2637901-MB-A02 - AliExpress