Hey folks Does anyone know the video ram memory for Mac mini with intel iris graphics I read on the internet that it is 1.5 GB, just wanted to make sure
It's an iGPU which means the VRAM is shared with the system memory. As such, the amount of VRAM is dependant on the OS version and amount of RAM. With 8GB+ RAM and the latest OS (10.12), it'll have 1.5GB. As the RAM isn't upgradable on the 2014 Mac Mini, you'll need to ensure it has this amount of RAM before purchasing.
Yes, and no. You can but it'll void the warranty, as it's not deemed to be a user-upgradable component. Also it's difficult to do: https://www.ifixit.com/Guide/Mac+Mini+Late+2014+Hard+Drive+Replacement/32815