Keyboard input lag/delay issues

Hey everyone, I’m running into a bit of a headache here. I’ve been playing Call of Duty: Modern Warfare and I’m getting this weird input lag on my keyboard, specifically when I try to use the arrow keys to move around. You can see exactly what I mean in this clip where I’m trying to strafe left and right while spamming keys constantly...YouTube...
Here is the breakdown of my setup, which might be relevant to the issue...

Motherboard - Intel Core i7
CPU - Intel Core i7
Graphics Card - Radeon HD7970 OC
RAM - 16 GB Crucial Ballistix Sport (2x8GB)
128 GB SSD, 2.5 TB HDD (the game is installed on the HDD),
Monitor - BenQ XL24030T ASUS Z87Pro Roccat ISKU FX
Keyboard/Mouse combo (using the included software, though there isn't any way to adjust the delay settings)

I play at 1080p resolution, and here are the hardware performance metrics...



(GPU temp, usage, core clock, memory clock, memory usage, CPU temp and usage, RAM usage, pagefile usage)

I was reading online that this kind of thing happens if the PC is being pushed too hard, so I was wondering if these numbers look like they indicate an overload for a build like this?
If anyone has any theories on what might be causing this, I would truly appreciate the help.

PS: I haven't tested this on any other titles yet, but I'll give Call of Duty: Black Ops III a shot later on.

Is this being played online, or did you actually sit down and test it offline? If you haven't tried the offline route yet, I'd highly suggest you go do that.

It seems like everything is working fine online. I gave Call of Duty: Black Ops III a shot and didn't run into any of those issues at all, and even in Call of Duty: Infinite Warfare, when I use the standard WASD setup for movement, the whole thing feels smooth and responsive without any lag. However, since I’m left-handed, I prefer using the arrow keys to move around, and that’s exactly where this annoying lag kicks in. I'm really hoping this is just some weird software bug that they'll patch out soon; until then, I guess I'll have to find a way to remap my WASD controls over to the arrow keys so I can actually play.

Try switching over to the arrow keys or the numpad—specifically 8456—provided that doesn't end up messing with your controls. Honestly, I think you'll find it much more intuitive; after all, anyone who relies heavily on WASD is almost certainly utilizing QERFC as well, and having those extra keys surrounding you on the numpad just makes sense, doesn't it? 😁

And honestly, you just have to get used to such a cramped layout; I actually ended up remapping my WASD keys to the arrow keys, and it works like a charm!