this is alarming, i`m mining with 4GB cards and if 3GB is at its peak now then im not feeling too good about 4GB...
thanks for the heads up, i might consider upgrading soon
4Gb cards will be good until April 2020 , of course if Ethereum doesn't go Pos before that time. In Windows 10 it may reach April 2020 a bit earlier because it uses some part of the Vram for Windows Os itself.
Don't worry though you have time until you reach the limit and you can always mine another algorithm.