Going from 110hz IPS to 240hz TN

[Kotoko]

Currently have a Overlord Tempest X270OC clocked at 110hz. Have played Dota 2 for years and recently started playing black ops4 right now. Scanning for enemies on the map is hard when trying to move the mouse around due to blur. Enemies are also hard to spot when far away or hidden in dark areas. Trying to follow enemy movement when shooting up close is difficult. Anyone know if I will benefit if I upgrade to an XL2540 when it comes to these issues?

[RealNC]

The tempest is a bit on the blurry side, so yes. Motion clarity will improve. Image quality will probably get worse though.

The X270OC was one of the first high refresh IPS displays, and pixel response is a tad too high, which does produce some smearing in motion. Later IPS gaming displays improved on that though, at least the G-Sync ones.

With that being said, you would get an improvement even with a 165Hz TN display. Doesn't have to be 240Hz. If you can't actually maintain 240FPS during gameplay, 240Hz is rather wasted.

[Kotoko]

Very true as I only maintain only 110ish fps. I plan to upgrade soon though.

But I also read that 100fps on 240hz display is better than 100fps on 144hz display?

[RealNC]

Btw, the 165Hz 1440p IPS monitors were rather good. One of them, the Asus PG279Q, is getting a refresh, the PG279QZ, with probably a completely new panel. No idea when, but it stands to reason that it might offer further improvements.

I'm using a current 165Hz IPS myself (an XG2703-GS), and it's very good in motion. Quite comparable to a 144Hz TN I have lying around.

[Chief Blur Buster]

At roughly 100Hz, there's not too much difference, but once you go above about ~144Hz (on current 2017-2018 panels), the differnce really diverges -- TN starts showing major clarity benefits.

It's when LCD pixel response (GtG, using the GtG90% metric) starts reaching approximately half a refresh cycle, that it starts to bottleneck motion clarity again. 4ms IPS looks good through to approximately 144Hz and 1ms TN looks good through to approximately 240-480Hz

In the most ideal case, display persistence (amount of motion blur) is equal to refresh cycle duration, when pixel response is not a bottleneck (still less than half a refresh cycle).

[Chief Blur Buster]

Scanning for enemies on the map is hard when trying to move the mouse around due to blur.

Roughly, on a blur rating scale, this is my estimates based on what I've seen with my eyes

Overclocked Korean IPS 60Hz->(~100 to 120Hz) = baseline of 1.0x motion blur
True 144Hz IPS (running at 144Hz, despite 165Hz overclock capability) -- approximately 0.7x the motion blur as yours
True 144Hz TN at full 144fps -- approximately 0.6x the motion blur as yours
True 240Hz TN at full 240fps -- approximately 0.4x the motion blur
Good strobe backlight (ULMB, DyAc, etc) -- apporoximately 0.05x to 0.1x the motion blur

It's quite useful to have a blur reduction mode if you're very interested motion blur reduction modes (ala descendants/clones of ightBoost).

[Kotoko]

I purchased a xl2540 and will install once I get home. Since I average 80-120 fps, would ULMB be the best option to use to minimize motion blur?

[RealNC]

At roughly 100Hz, there's not too much difference, but once you go above about ~144Hz (on current 2017-2018 panels), the differnce really diverges -- TN starts showing major clarity benefits.

The Tempest X270OC (the OP's monitor) seems to be a 9ms panel though. It seems to be much blurrier than the later "IPS-type" ones.

[RealNC]

I purchased a xl2540 and will install once I get home. Since I average 80-120 fps, would ULMB be the best option to use to minimize motion blur?

With ULMB you need to have a fixed FPS. If you use 120Hz ULMB, your FPS needs to be 120 at all times. Note that the XL2540 does not support ULMB. Not sure if/what other strobing technology it has though.

Also, the 240Hz monitors are made for 240Hz operation. If you use lower refresh rates, you get more input lag, unless you use an EDID override tool to create a custom 120Hz or 144Hz mode.

[Kotoko]

I want to keep it at 240hz yes, I do not want to use a lower refresh rate