Amazon.com: Valley Of The Sun for NVIDIA Quadro K3100M GDDR5 4GB Graphics Video Card, for HP ZBook 17 G3 G4 Mobile Workstation Laptop PC, N15E-Q1-A2 MXM 3.0 VGA Board Replacement Parts :
Source 708539-001 728555-001 FOR HP Quadro K5100M 8GB GDDR5 256-bit Graphic Card on m.alibaba.com
Amazon.com: Genuine New 8GB Graphics Video Card Laptop GPU Upgrade, for Dell Precision M6700 M6800 Mobile Workstation Notebook PC, NVIDIA Quadro K5100M GDDR5 8 GB N15E-Q5-A2, MXM VGA Board Replacement Parts :