24" 1920x1080 vs 20" 1600x900

[Keith Cheng]

I searched up the PPI and they are both the same. What do I have to consider before upgrading to the 24" monitor?

Will I see a difference in sharpness or resolution? Do I have to even consider the PPI of monitors?

I want to know if the purchase is just a difference in screen size.

http://www.ncix.com/detail/acer-g247hl-bd-24in-led-be-105815-1089.htm

 

[guanyu210379]

Screen size is the main diffrence.
PPI is important but up to 27", you won't really see any pixels with FullHD, unless you are using the monitor only 10 cm from your eyes.
Starting from from 29", you might wanna look for 2560x1440 and no longer 1080p anymore, just watch out for your GPU if you game a lot.

I upgraded from 19" 1650x1050 to 24" 1920*1200, I noticed no difference pixel-wise, but the size really makes a big difference.
I enjoyed the upgrade every second I am looking at the monitor.

 

[JackNaylorPE]

being the fact that they are the same PPI, that means the "graininess" of the images (or lack thereof) will be comparable. The number of pixels on the screen affects the amount of accurate info which can be placed on screen so more info means less jaggie lines, more accurate color representation, more accurate polygon shapes, etc.

If you have a low ppi (the human eye on average can see individual pixels below about 96 ppi) monitor your image starts to appear like the images on currency .... you can see the individual dots like when you get too close to a big screen TV

 

[guanyu210379]

The trick is, PPI and graininess have something to do also with the distance between your eyes to the monitor.
That is why you are not seeing any pixels on 1080p 37" TV from 5 meters away but you will see pixels on your 1080p 10" tablet PC from 20cm away.
96 ppi is also grain free if you look at it far enough.

You see also this effect on cars, if the cars is far you see only 1 light but after the car is near enough you see 2 lights.
The lights represent pixels.

 

[JackNaylorPE]

The 96 ppi thing comes from the fact that peeps tended to read paper from 12-14" away and sit at computer screens that were about 1/3 more (16 - 18"). So it was decided by MS to jump from the 72 ppi that Apple used to 96 ppi

http://blogs.msdn.com/b/fontblog/archive/2005/11/08/490490.aspx
http://en.wikipedia.org/wiki/Dots_per_inch#.23REDIRECT_.5B.5BDots_per_inch.23Computer_monitor_DPI_standards

So any discussion about ppi with respect to viewing distance must keep in mind the origin of the 96 dpi standard. At lesser or greater viewing distances, the 96 ppi target would no longer apply.

 

[Keith Cheng]

I would enjoy the size increase immensely. So is this upgrade just a size upgrade since the ppi is the same?

Also, would the 1920x1080 21.5" model be more crisp/sharp since it is smaller (Higher ppi)?

 

[naqeeb_emeran]

I would choose the 21.5" monitor since you would get a slightly higher PPI AND a bigger screen. You win both ways. If your GPU is not built for 1080p then a 20 inch 900p display is perfect. Also, use supersampling and AA on your 900p display before purchasing. SS makes a HUGE difference.