Well, I'm not sure how much you understand about monitors, so I'll try not to sound patronizing =)
 
The Hz is the monitor's refresh rate. Most run of the mill monitors have a 60Hz refresh rate, which means the monitor will display up to 60 frames per second, which is the target most gamers attempt to achieve whilst running games. This will mean the game runs silky smooth and has no issues. A 144Hz monitor will display well over 100 frames per second, but only if your graphics card(s) can provide that amount.
 
So, it would give you the ability to "see" 144 frames per second, but only if your hardware actually runs the game at that amount. If your hardware can only manage 60 frames per second in a game, that's all you'll get. The Hz of the monitor is just a "cap" or limit. So the monitor won't increase your performance, it'll just raise the cap on the frames per second you can perceive.
 
I note that you're using a GTX 680, which is a high end card. In a lot of games, you would notice a difference over a 60Hz monitor because your card will achieve far more than 60 fps in a lot of games. Typically anything over 100-120Hz and you wouldn't really notice/see it, even if your card achieved it. On the other hand, if you're achieving 100 frames per second on a 60Hz monitor, you'll only see 60 frames per second as the monitor can't refresh the screen any faster than that. There is a noticeable difference between a 60Hz monitor and a 100-120Hz monitor, providing your hardware can provide those framerates. Beyond that, you wouldn't really notice.

I just picked up this monitor last week and I'm loving it

If you're running Battlefield 3 at 100 frames per second, then a 100Hz monitor would allow you to experience the full 100 fps. You *would* notice the difference between a 60Hz monitor and a 100Hz monitor, if you're achieving those framerates, and yes, less tearing, as the monitor wouldn't require you to vsync down to 60 like most do to prevent tearing. If that's pretty much all you play, and you achieve 100 fps, then anything over a 100Hz monitor is overkill, it will provide you with the ability to see more than 100 frames per second but wouldn't actually increase your framerate above what it is now. I.e a 144Hz monitor is only better than a 100Hz monitor if you can actually run games at 144 frames per second instead of 100.

It's a good monitor, and well worth it, especially as I just noticed you run dual GTX 680's. You'd easily achieve 144 FPS in most games that way, and the monitor would allow you to "see" all of it. You may get the feeling that the games seem to be running "too smoothly" at first. It's an odd feeling in my experience lol

Yeah I just noticed it said SLI on the end. It's well worth it in that case, otherwise you're providing a huge amount of FPS that you aren't able to see. In certain games, like Crysis 3 and Metro 2033 specifically, you'd be lucky to exceed 60 FPS with that setup on max settings, but in most games you'll achieve the 144 fps cap and get to enjoy it all.

Yeah, you're all set. Like I said, your setup will achieve the 144 fps in most games. Crysis 3 is a combination of extreme graphics and terrible optimization, and Metro 2033 is notoriously badly optimized, so even a GTX Titan SLI setup doesn't provide a ridiculous amount of FPS in those games, but in 95% of games you'll hit well over 100 fps.

I have Metro 2033 but never really liked the game anyway so I uninstalled it before I got my second 680. I used to get a lot of tearing and drops in FPS too. I even deleted my benchmark results for it. The only reason I bought it was because Motherboards.org showed it on sale for $7.99 at Amazon.

dbkams

yea going from 60hz up to 120hz on my setup was perhaps one of the best things i ever did to improve my gaming experience

congrats on the purchase :)

I've heard a lot of good things from people that have upgraded to 120 Hz but I had to ask anyway. What can I say but I am getting old and money burns a hole in my pocket for some reason. Tomorrow I will kick myself silly but for now I can't wait to see it! It is going to be nice to have a screen without scratches.

Unless I can find a cable around here it looks like I might wait until I can afford one to see any 144 Hz picture. I only have HDMI right now and the ASUS manual says HDMI only supports 60 Hz. I'll have to wait until next month for a $30 Display Port cable or get one of these at Radio Shack:
http://www.newegg.com/Pro...&IsVirtualParent=1
 
Is this the right cable to give me 120-144 Hz?

Are you coming from 60 hz? If so and your comp can put out high frames then yes the difference is night and day. I recently went from 3 60hz monitors to 3 of those Asus' and it's pretty mind blowing how much better they are. I haven't even messed with Lightboost yet.

Well, I'll find out tomorrow or Wednesday what kind of HDMI cable I have then. ASUS was kind enough to include a VGA cable but I don't think that's going to cut it. Besides, I have tons of VGA cables already. Why would you include a VGA cable with a 144 Hz monitor? And I thought I was the moron!
Looks like I need a cable:
 

I have a few but since they were included with different monitors they are probably single link and about as useful as a VGA cable. Ha! Time to go rummaging through my junk pile!

NemesisChild

Am I missing something here, but wouldn't a DVI to DVI cable work for 85-144Hz?

I'll let you know. I just ordered a Dual link DVI cable. If necessary I'll just have to order another different cable. I knew I would be kicking myself for buying this monitor!

I don't know what this chart is trying to tell me. For 120 Hz use a DVI-D or DP cable? Or do I need a DVI-D to DP cable?
 

A normal DVI cable is only 60 hertz. The only cable that can run 120 - 144 as ive said is Dual dvi to Dual dvi.