Question Built-in monitor KVM vs external KVM for 4K 240Hz?

Apr 20, 2017
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I am looking into buying a 4k QD-OLED monitor this fall (hoping on some Black Friday deals, but prices only seem to be going up due to scarcity), and am trying to figure out how I can make a work-from-home set up with two Windows devices and two monitors (the potential new QD-OLED one and my old 1080p one). Last year I bought a dual monitor KVM that can support up to 4K 60 Hz, thinking that I probably would get a 1440p monitor, or that 4K OLEDs are mostly 60Hz, which turned out not to be the case - they all are 240Hz. According to ChatGPT the Asus PG32UCDM and MSI MPG 321URX both have an integrated KVM, but at least for the Asus one it seems at least as of June the KVM functionality has issues when HDR is turned on. Also, I assume the integrated KVM will only work for the host screen only, and it won't be possible to switch my other monitor automatically as well?

In this case, I am slowly gearing towards the Alienware AW3225QF that is on sale for $1075 (after taxes) where I am, which is a cool $200-$300 off (it does not seem to be seeling well, perhaps because of the curve), with the plan being to plug both monitors in the KVM as usual and run the AW3225QF at the max supported 60Hz most of the time, but also run a parallel DP/HDMI connection to the GPU of my gaming rig so that I can manually switch sources from the KVM to the 240Hz link when I am gaming. The only compromise in this case is that for productivity (most of the time) I will still be viewing it at 60Hz, but I don't think there would be a noticable difference when using Microsoft Office, VSC and the like... I don't know if high refresh rate 4K KVMs exist, but considering I barely found one (no name brand) that can run Dual 4K @ 60 for under $150, then they are probably prohibitively expensive..

Any ideas?