Compatibility of NVIDIA GEFORCE 230M graphic card - Microsoft Community
Amazon.com: Valley Of The Sun New Laptop Graphics Card GPU Replacement, for HP Elitebook 8540W 8540P 8560W 8770W Mobile Workstation, NVIDIA GeForce GT 230M GDDR3 1GB MXM Video Board Spare Parts :
Original GT230M GT 230M N10P-GE-A3 Graphic Card For HP 8540W 8540P 8560W 600-1120 1GB 594506-001 1GB Video Card - AliExpress
Amazon.com: New Graphics Video Card GPU Replacement, for HP EliteBook 8540W 8540P 8560W 8770W Mobile Workstation Laptop, NVIDIA GeForce GT 230M N10P-GE-A3 GDDR3 1GB N10P-GE-A3, MXM VGA Board Parts : Electronics