I have inspiron 5520 whose motherboard was replaced . Everything works fine for me except that there is no dedicated card showing up in device manager (windows 8.1).
Before replacement i had AMD 7670m card..
All i want to know that the new motherboard has AMD card or not as windows is not showing it in device manager ...? or it is some other problem something related with bios setting .
I ran GPUZ utility program it show me that my card is using dedicated memory and multigpu disabled.
The dealer told me that the new board has the dedicated card and he gave me warranty of exact replacement board
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