No. You cannot upgrade graphics in that laptop because there is no separate graphics card. The GPU is part of the motherboard. The only way to upgrade would be to replace the entire motherboard, but there in no motherboard for that laptop that has the GPU that you want. According to the Inspiron 5580 specifications, you already have the most powerful GPU that was available for that laptop model, the Nvidia GeForce MX150. The only other options were Nvidia GeForce MX130 or no discrete video at all and just Intel UHD Graphics. [NAME] already told you that in your other thread.
Device name DESKTOP-BNQRVA4Processor Intel(R) Core(TM) i5-8265U CPU @ 1.60GHz 1.80 GHzInstalled RAM 8.00 GB (7.79 GB usable)Device ID E21CACA4-DFC1-457F-BE22-B3C90B79DBB7Product ID 00331-10000-00001-AA551System type 64-bit operating system, x64-based processorModel :  Inspiron 5580 Graphics Card : MX 150 2gb I wanted to upgrade my graphic card to gtx 1650. Is it possible? and could u pls suggest me a good graphics card for gaming   
Can we change graphics card mx 150 to gtx 1650