what graphics card can i upgrade to in my toshiba

[andreasaspenberg]

i have a toshiba qosmio X70-A. i am considering upgrading its hardware(processor and graphics card, maybe even memory). i need no help with the memory as i know it supports so dimm ddr 3. the processor and graphics card can be removed and replaced. it is one of those laptops with an actual graphics card slot. i have no idea what graphics card i can fit in there however. currently it have a gtx 770m. i know that i can upgrade to i7-4940MX but it will not help if i can not upgrade to a powerful enough graphics card.