hello. I was thinking about putting a gpu in hp probook 4540s but I came across the motherboard issue that it doesnt support this. It already has intergrated graphics and you cannot put gpu of your own choice. so I was wondering if there is some spare hp motherboard that allows you to put gpu on it or is there any other motherboard that can be bought and replaced so we can use gpu in hp probook 4540s. Any comments will be appreciated. thanks