Some FPS stats from more than a year ago when I played and monitored Warzone:
Asus ROG Strix G17 G713QR-HG022T
AMD Ryzen 9 5900HX
RTX 3070 8GB 115+15W
RAM G.Skill Ripjaws 2x16GB 3200MHz CL22 1.2v (F4-3200C22D-32GRS)
(stock clocks, my normal graphics settings in Warzone, DLSS disabled)
2x8GB original memory, internal monitor: 117.5 FPS (100%)
2x8GB original memory, external monitor: 136.1 FPS (116%)
2x16GB RipJaws memory, internal monitor: 144.3 FPS (123%) - 23% higher fps in Warzone by replacing memory
2x16GB RipJaws memory, external monitor: 162.2 FPS (138%) - 38% higher fps in Warzone by replacing memory and using external monitor via USB-C port
Using ripjaws and external monitor I had same fps in 2560x1440 as I had in 1920x1080 with default RAM and monitor, there are 78% more pixels in 1440p and it looked awesome 🙂
Using external monitor through DP 1.4 cable and USB-C port, not HDMI