So I was playing Minecraft 1.14.2 with AMD Radeon HD 7730 1024 MB, 128 bit. 1.14.2 works fine, Now I bought a new GPU, GT 730 2 GB ddr3, 64 bit. OC Edition, and download Minecraft 1.14.3... I load my world, and when It's loads, I got huge massive Lag spikes, I can barely play.
It is caused by an old Java version because when I played 1.14.2 with an old java, It bugs me so much, now I downloaded the latest one, now it works fine, very fine and this is also the fix for the latest version that I reported.
so, therefore, the new GPU has nothing to do with it.