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United Kingdom20326 Posts
For higher refresh rates, you have to ask what you really want to get out of it. There are two main benefits - one, that seems to be talked about a lot more, is image smoothness - we can see gains in image smoothness up to ~240hz+++ and gains of 1.1x~ over 60hz are very easy to see and appreciate
The main benefit for me is input latency. After you take into account the entire chain of latency from input lag, dealing with cpu/gpu/game/whatever, everything that happens, and then the latency from processing in the screen(?), a 60hz refresh cycle adds an average latency of 8.34ms and a peak latency of 16.67ms.
144hz reduces that to ~3.47ms average and ~6.94ms peak, so it's a reduction of ~4.87ms on average, 9.74ms peak in latency.
From data i've seen, that accounts to about a 30% increase in latency from a pretty good setup by switching from 144hz to 60hz with no other changes.
I'm not sure how standard it is for IPS to have higher input latency than TN. I think there's some added for signal processing, stuff like scaling or maybe just in general on some monitors but not others. Response time kind-of adds to latency, so absolute latency will be higher on a slower monitor there. I think, overall, an 80hz IPS would probably feel closer to a 60hz TN instead of a 120-144hz TN in terms of input latency, so your main benefit would be the smoothness.
80hz is a bit of an awkward refresh rate though, for 24fps, 25fps, 30fps and 60fps video. 60hz, 72 and 75hz might be better for media consumption if that stuff bothers you - i'm not really sure how much effect it has. Personally i use SVP a lot now (software frame interpolation, it's pretty good for some types of media) so you might want to look into that, but for gaming you generally just want as high a refresh rate as possible without skipping frames.
There's a frameskip test on http://www.testufo.com/#test=frameskipping .
^Basically how this works, you make sure it's running at your refresh rate and it's green, so it's working properly. Then it flashes white squares in sequence, one per frame. You take a picture of the screen with a camera on low exposure, so that it captures light from multiple frames, and on the camera picture you see a chain of white. If any of the boxes are skipped over, and you see like box 1, 2, 3, 4 and 6+7 are lit up but not 5 for example, you know you're skipping frames, and you should adjust or fall back on your overclock until that doesn't happen, because it's bad
(note: the Dell has a very low input lag for an IPS)
Just a note here, "response time" refers to the amount of time that the pixels take to change colors (usually measured grey to grey) and is not related to actual latency in the screen after receiving the signal before it reaches the refresh/output stage. That varies screen to screen some and it's usually not advertised, but it's important. That's one of the more common misconceptions, in case you wasn't sure
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dezi
Germany1536 Posts
I was refering to this test (tftcentral):
Dunno how fast my 226bw is in this regard (some old sources claim he's very quick aka 1ms input lag).
In terms of overclocking i was refering to this thread: http://www.overclock.net/t/1452897/dell-p2414h-ah-ips-pwm-free-light-ag-coating-1080p
They state the P2414H is stable at 80Hz (no skips).
Still not sure though if i should go down this road or get the BenQ for Lightboost. FG2421 is out of my league (500€).
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United Kingdom20326 Posts
Dunno how fast my 226bw is in this regard (some old sources claim he's very quick aka 1ms input lag).
Maybe 1ms grey to grey response time, but that means something completely different to input lag
your test image didn't load :D
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dezi
Germany1536 Posts
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Hey guys.
Looking to buy 24" monitor for a three monitor setup for work and gaming. My budget is £150 (roughly $250) per monitor. Any advice? I know nothing about monitors except for a low response time and a smaller edge (bezel?) so looking for some advice on how to spend my money!
Thanks
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P2314H, U2312HM, or U2414H if you want to pay a bit (a lot) more for thin bezels.
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Thanks for the responses. But all these products have response times of 5ms and above? Surely if I can get a 2ms response time monitor I may as well?
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Advertised response time don't mean much because there is no universal standard used across manufacturers. Most of the monitors today have very minimal ghosting.
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The amount of perceived blur from moving objects is mostly related to refresh rate anyway on most 60 Hz displays (other than some transitions on a VA or a slower IPS), so it'd be largely the same on a display with 0 ms response time. It's the fact that the eyes' movement is fluid but objects don't (start to) change position until the next refresh 16.66 ms later.
What you do get on the displays with lower response times is much worse color and gamma consistency in practice due to more strongly angle-dependent visual behavior, which is even more relevant if you have a multi-monitor setup.
That said, if you don't mind these issues you can get a cheaper display that may also have a lower response time. See how these solid colors look on your current display, for example:
http://www.lagom.nl/lcd-test/viewing_angle.php
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Can't find 120Hz 27" 1440p IPS monitors. Going to go with the QNIX QX2710 then. Thanks for the help~ Gonna wait for the 30+" 4K IPS monitors to drop under $1400 before getting :D
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Blazinghand
United States25558 Posts
I've been looking into some of these newer UHD monitors, and I was thinking about getting one for usage with my 13" Macbook Pro (link), which can do HDMI or Mini Displayport. My budget for this monitor is $700.00, though I could go a bit over if something was really a great deal.
I considered the Dell P2815Q since it's only $600 and I've liked Dells in the past, but I wouldn't be able to handle a 30Hz monitor. I need 60Hz.
I'm currently looking at the Lenovo Thinkvision Pro2840m but I'm having trouble telling from the tech specs whether it does 3840x2160 @ 60hz. Also, it feels like I'm paying extra for speakers, but I can't find a version that doesn't have speakers attached.
What I'm leaning most strongly towards is this Asus PB287Q. It looks like it clearly does 3840x2160 @ 60hz and the price is right ($650). It has some negative reviews on Newegg but a lot of them seem related to problems like "difficult setup" but there are some reviews about popping sounds that worry me. Overall it doesn't seem too bad...
Part of what I'm thinking about is whether my 13" "retina display" MBP can actual handle driving a UHD monstrosity via MiniDP/DP. I don't plan to do any gaming on this, I mostly want to do word processing while having other windows (browser windows, etc) open at the same time. I'm also having difficulty finding a monitor that does 60hz and isn't awful, though the Asus... seems to be that.
In any case, I'd like someone to let me know if I'm way off there about what my computer can handle in terms of monitor size, and if the Asus is actually awful.
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Can someone confirm me that the difference between the BenQ XL2411Z and XL2420Z only lies in the way the support is built? 100 euros difference for an articulated foot seems a lot to me but I don't see any other difference ^o)
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United Kingdom20326 Posts
On August 12 2014 00:19 Nimix wrote:Can someone confirm me that the difference between the BenQ XL2411Z and XL2420Z only lies in the way the support is built? 100 euros difference for an articulated foot seems a lot to me but I don't see any other difference ^o)
I went with to Benq xl2411z due to cost. Its the same panel as the 2420z, just less connections.
Just quoting from OCN because i don't know myself.
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I guess connecting it via DVI is fine anyway? If it's the same pannel I'd as well buy the cheaper one, I don't care about adjusting anything else than vertical height. Thank you!
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On August 13 2014 10:50 Nimix wrote:
I guess connecting it via DVI is fine anyway? If it's the same pannel I'd as well buy the cheaper one, I don't care about adjusting anything else than vertical height. Thank you!
Need a DVI-D cable not DVI-I or you won't get 144Hz (I think DVI-I maxes at 60Hz)
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I suppose it comes with the monitor, I would be kinda mad if they sold a 144hz monitor with a single link cable 
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D stands for digital, not dual link.
DVI-D and DVI-I are both capable of 144Hz.
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EPT![[image loading]](http://www.tftcentral.co.uk/images/dell_p2414h/lag.jpg)
why can't you make a good 30" 4K IPS under 1k for us skyR T_T
