Unreal 4 Elemental Demo DX11 & DX12 Performence Compare
There was memory (Main Memory & VRAM usage have increase Doubled) issue when using DX12.
Hope Epic Games will fix this issue.
My Device:
CPU: Intel Core i7 5820K
MB: ASUS X99-E WS
Memory: Kingston HyperX Fury DDR4 2400 MHz 64GB
Graphic Card: MSI Geforce GTX780-Ti VRAM 3GB x2 (SLI Off when Testing)