Latter 3 for ram personally
None of these modules will operate at 3200 MHz? It won't even boot to Windows, will it? Those aren't B-die, and B-die is quite a bit more expensive. No.
Maybe the best would be just to settle for a 2800 MHz kit?
All 2800 MHz modules will work at the specified frequency, 100% guarantee?
If that's a 24" 4k not being used for media work then avoid unless you spend gaming looking through a sniper scope to explode up the image , believe you'll have to sit about a forearm length away from the screen to see difference over HD
Good maths if you've got 20/20 vision
The HD monitors are with so large pixels, that it is impossible for me to look at the picture without wanting to throw the monitor out of the nearest window, straight in the trash.
Ultra HD is the only option for me. No, it won't be used primarily for gaming but reading and clear, crisp text and image is essential for good experience.
HD resolution shall go for the six-inch smartphones only and nothing larger.