Intel iris xe graphic card only uses 128mb vram in some games

[Ghost0p]

I have intel integrated graphics card on my device(intel iris xe) which has 4gb vram but in some games like God Of War it only uses 128mb vram instead of 4gb. please solve this issue.

laptop:- 

HP 15.6 inch Laptop PC 15-d4000

[LeonWaksman]

Please read the explanation under How much graphics memory does my computer have?

Leon