Apple 23" Cinema Refresh Rate (Hz) issue

hey everyone, just got a new apple monitor for christmas and i absolutely adore it. one thing that is really bugging me though is the refresh rate. my old CRT monitor i got quite used to 100hz playing first person shooters, i feel with the 60hz default it is not smooth at all when playing action games. is there a way to change this? i've tried almost everything.
thanks in advance

The 23" at 1920 x 1200, 60Hz is pushing the limit of its single-link DVI port. It cannot run any faster. CRTs needed faster refresh to stop flicker. LCDs don't have flicker, but do have a slight lag. There is nothing you can do about it.

Similar Messages

Apple TV 3 Refresh Rate

Why doesn't the Apple TV 3 allow a refresh rate of 24fps? I read somewhere that the Apple TV 2 only output at 25 or 30fps because 720p/24 wasn't an official standard.
But 1080p/24 is! The content sold on iTunes is 1080p/24 and Blu-ray players and modern HD televisions use this standard, so I don't understand why the Apple TV 3 only outputs at 25 or 30fps. In either of those refresh rates, you get a stutter every second or so when playing 24fps content. It's really annoying.
Shaun

Use this link:
http://www.apple.com/feedback/appletv.html
The truth is here that Apple have always regarded this item as a hobby, and treat the item as a convenience rather than a quality media product. Even though many people may not notice the absence of 24fps output, I think it's one of those expectations for consumer AV devices now, even cheap ones.
One thing to remember however is not to confuse the refresh rate with the video encoding rate.
I think from memory most iTunes movies will be encoded at 24 fps, just output at 50Hz/60Hz depending on the connection.
With 25 fps 'PAL' or NTSC near 30 fps source video (eg from camcorders) however 50Hz/60Hz make sense but there would be further compromises if this material was output at 24 fps.
AppleTV 1 maxed out decoding 720p at 24 fps (25fps if lucky), and choked on 30 fps, but AppleTV 2 allowed decoding of at least 720p 30 fps, and the newer version should manage 1080p at up to 30 fps rates.
I'm with you and would prefer the lower film like 24 fps quality rates where the source is 24 fps and TV can handle it, there are counter arguments from those who feel more is better in terms of frame rate of course.
I think there are further complexities with motion artefact on AppleTVs beyond simple frame rate - for example I can watch a DVD on a TV and it looks smooth, but may see motion artefact in a file encoded for AppleTV of the same material. h264 may achieve better compression than MPEG2 but something must be lost.
AC

X220 uncontrollably switches to 50Hz refresh rate upon unplug from power source

Hello,
I'd like to reiterate that I LOVE my x220 apart from the few issues I have with it. Having said that, I am having the (seemingly) ubiquitous problem where the laptop constantly switches to 50Hz when unplugged from a power source. I have tried reinstalling the Power Manager and Power Manager driver, and all of my system software is up to date.
Just to be certain, is everyone else experiencing this issue as well? I know T420s owners recently reported it and it was subsequently forwarded to engineering. As long as a fix is in the works I am happy. :-)
Owner/Technology Specialist
Triple-S Computers - http://www.TripleSComputers.com
Solved!
Go to Solution.

Hey erik,
I really do appreciate your input. That's a good idea, though honestly I don't know if I will bother with all of that now. :-) Perhaps instead if I get a moment in the near future I may try wiping out all Intel graphics drivers entirely from the system manually and then reinstalling.
Having said all of that, on a somewhat unrelated note, I'm getting 4,900+ in 3DMark06, which is shocking! After experiencing the trouble with the unplug/replug refresh rate switch, I tried a wide variety of solutions including using the 2361 graphics drivers from Intel's site. This plus my high-speed fan settings at anything over 60C probably helped contribute to the score I guess.
But back to the topic... is anyone else experiencing these same refresh rate switching issues?
Owner/Technology Specialist
Triple-S Computers - http://www.TripleSComputers.com

Laptop switches to 40hz refresh rate when i remove AC power

This problem started today,Everytime i remove the ac power;A black screen comes momentarily and the screen which i was working on comes back,but this time the animations are kinda sluggish so i checked the advanced settings for display and found out that every time i remove the ac power it switches to 40Hz refresh rate and when i switch it back to 60Hz and then i plug in,it stays 60 but when i plug out it reverts to 40Hz.What bothers me is that this problem never came until today.

Hey erik,
I really do appreciate your input. That's a good idea, though honestly I don't know if I will bother with all of that now. :-) Perhaps instead if I get a moment in the near future I may try wiping out all Intel graphics drivers entirely from the system manually and then reinstalling.
Having said all of that, on a somewhat unrelated note, I'm getting 4,900+ in 3DMark06, which is shocking! After experiencing the trouble with the unplug/replug refresh rate switch, I tried a wide variety of solutions including using the 2361 graphics drivers from Intel's site. This plus my high-speed fan settings at anything over 60C probably helped contribute to the score I guess.
But back to the topic... is anyone else experiencing these same refresh rate switching issues?
Owner/Technology Specialist
Triple-S Computers - http://www.TripleSComputers.com

Apple 30 Inch Vertical Sync and Hoeiz Refresh Rates

I am trying to figure out the exact Vertical Sync and Horizontal Refresh Rates.
I have a dual boot setup with OS X and Ubuntu Linux on my G5 PpwerMac
I know that the Dell 30" is pretty close ( which I am using now ) but I don't want to damage my Display by using the wrong specs.
So If anyone knows the sync and refresh rates it would really be appreciated.

Here is a section from the 30" Cinema's EDID data that has the info you want:
Descriptor #1 is Timing definition:
Mode = 2560 x 1600 @ 60Hz
H. Active...............2560 pixels
H. Blanking.............160 pixels
V. Active...............1600 lines
V. Blanking.............46 lines
HSync Offset............48 pixels
HSync Pulse Width.......32 pixels
VSync Offset............3 lines
VSync Pulse Width.......6 lines
Pixel Clock.............268.00MHz
Horizontal freq.........98.53kHz
Vertical freq...........59.86Hz
H Image Size............641mm
V Image Size............401mm
H Border................0 pixels
V Border................0 lines
Non-Interlaced
Sync: Digital separate with
* Positive vertical polarity
* Negative horizontal polarity

Quicktime Video on an LCD Projector Problems & Refresh Rate?

I'm having an issue and don't have a lot of experience with this but hopefully someone has some insight.
When i play back video (formats including DV, DV50, HDV, PRORES422 / interlaced or progressive / frame rates of 23.98 or 29.97) in full screen using Quicktime Player (version 7.4.5) and Present (Shift CMD F) to a projector, the video plays and looks good, with the exception of during certain portions of the video (generally, with a lot of motion), i see either a flicker or what appears to be a scan line, tear, or a trace that scrolls vertically up the image. The flickering/trace is consistent with regard to a particular portion of the video, though when i adjust the refresh rate for the projector, the behavior of the flicker or scrolling trace changes (say at 60hz, it scrolls slowly up vs 85hz where i see mostly flickering/tearing of the image or multiple traces scrolling up). I've tried 3 different projectors, and every combination of screen resolution and refresh rate with no success.
I should point out that when i play these videos full screen on a cinema display (20in or 23in) i don't see this behavior at all.
So, i have a few specific questions:
1. Is anyone familiar with this behavior and any solutions?
2. The projector is connected with a VGA cable and DVI adapter. Might a DVI cable resolve the issue? Is the behavior a result of the analog input? (The cinema displays are connected via DVI and don't exhibit the behavior)
3. If it is a projector issue, any recommendations on a good projector for presenting video played back from a computer?
Thanks in advance for your help. If i've posted in the incorrect forum, please do direct me to the right place.
Shane

Just a fast reply... something to think about...
Use 60hz, most lcd are 60hz. Check you resolution specs for the projector. If the native resolution is 800x600 use that setting if higher use that.....
If your using the lcd as a secondary display try setting the main display to the same specs. Sometime a mismatch between the two displays can cause problems.
Go with the lcd spec settings that's the main priority and the main display isn't.

27" iMac Monitor "refresh rate"

Hello!
I'm considering buying a 27" iMac but there's 1 more thing that I need to know before doing so.
Before you go ahead and tell me that refresh rates on a CRT and LCD monitor are not the same: I'm aware of that. LCD screens still have a similar thing, though, refreshing the entire image. Let's call it fps as I've no clue to what it's actually called.
Since it'll be used, mostly, for FPS games I want a screen who's able to pull off at least 100fps (like 100Hz in the old days) at various lower resolutions. Do you know if the iMac's screen able to do this, and if you do, do you know the various rates for different resolutions?
Nicolai

Is it less than two weeks old? Check if your store has a replacement policy?
Is it less than a year old? Check with the local authorized service centers if you feel you have done nothing that could have possibly damaged the machine, as this would be a hardware issue.
Is it under AppleCare? Same thing.
If it isn't expect to pay more than just adding an external display. If you are in the U.S. http://www.dttservice.com/ is a good company to check out for under non-AppleCare replacement costs. Mid-2011 should still be under AppleCare unless you bought it really early on. May 3rd was when it came out in the stores, so you probably are still under the 1 year coverage, but better hurry, unless you registered it with Apple early. At minimum buy AppleCare so you are covered for an additional 2 years if you haven't already, since it is showing signs of possible wear not normal to be seen.

Problems getting a higher framebuffer refresh rate

Hello everyone just changed from Gentoo to Arch
Anyway here is my problem, I usually use a framebuffer resolution of 1280x1024-32@75. I used to use a Nvidia BFG Geforce Ti4200SE 128MB and it had no problem of booting into the above resolution. I recently upgraded to a Nvidia Chaintech Geforce 6600 GT 128MB AGP and since then the refresh rate stays at 60 regardless of the resolution (tried 1024x768). In Xorg the refresh rate does change to 75.
Solutions I have tried are:
Patching my kernel with the vesafb-tng patch and setting my resolution and refresh rate in the kernel, but that didn't work.
Using fbset, found this on gentoo forums.:
xvidtune -show | ./modeline2fb.pl >> /etc/fb.modes
modeline2fb.pl
#!/usr/bin/perl
# Written by Michal Januszewski <[email protected]>
# Based on octave script from http://www.linuxdocs.org/HOWTOs/Framebuffer-HOWTO-14.html.
# Usage:
# xvidtune -show | ./modeline2fb.pl >> /etc/fb.modes
$modeline = <STDIN>;
$modeline =~ /".*"s+([d.]+)s+(d+)s+(d+)s+(d+)s+(d+)s+(d+)s+(d+)s+(d+)s+(d+)/;
$dcf = $1;
$hr = $2;
$sh1 = $3;
$sh2 = $4;
$hfl = $5;
$vr = $6;
$sv1 = $7;
$sv2 = $8;
$vfl = $9;
$pixclock = 1000000 / $dcf;
$left_margin = $hfl - $sh2;
$right_margin = $sh1 - $hr;
$hsync_len = $sh2 - $sh1;
# 3) vertical timings:
$upper_margin = $vfl - $sv2;
$lower_margin = $sv1 - $vr;
$vsync_len = $sv2 - $sv1;
$rr = $dcf / ($hfl * $vfl) *1e6;
$hsf = $dcf / $hfl * 1e3;
printf("mode "%dx%d"n",$hr,$vr);
printf(" # D: %3.2f MHz, H: %3.2f kHz, V: %2.2f Hzn", $dcf, $hsf, $rr);
printf(" geometry %d %d %d %d %dn", $hr, $vr, $hr, $vr, 32);
printf(" timings %d %d %d %d %d %d %dn",
$pixclock, $left_margin, $right_margin,
$upper_margin, $lower_margin,
$hsync_len, $vsync_len);
printf("endmoden");
fb.modes
mode "1280x1024"
# D: 135.00 MHz, H: 79.98 kHz, V: 75.02 Hz
geometry 1280 1024 1280 1024 32
timings 7407 248 16 38 1 144 3
endmode
However fbset 1280x1024 keeps the framebuffer refresh rate at 60.
Is there anything else I can try?
Kernel= 2.6.12 patched with vesafb-tng, inotify, fbsplash
System=
Athlon-xp 2600
768MB pc3200
Chaintech 6600 GT AGP
450W Rosewill PSU
Boot=
root (hd0,1)
kernel (hd0,1)/kernel-2.6.12-arch-r3 quiet devfs=nomount root=/dev/hda4 video=vesafb:ywrap,mtrr,1280x1024-32@75 splash=silent,fadein,kdgraphics,theme:darch CONSOLE=/dev/tty1

Some thoughts...
how much is calibration? how much is that TV?
some say TV's should be calibrated again after 6 months of usage where the TV has had some break-in. How much is that second calibration???
some say they just run on theatre or cinema mode to save costs
some say they don't like the calibration and flip back to the normal, bright or vivid mode. Personally I hate to see the highlights punched out and looseing detail for the brightness
some purchase Spyder or XRite calibration tools
some will use Apps to do their own calibration (note you need a cable or a wireless box), however you don't want someone who is colorblind making those calibration decisions (like me)
https://itunes.apple.com/ca/app/thx-tune-up/id592624594?mt=8
http://www.pcmag.com/article2/0,2817,2414804,00.asp
http://www.youtube.com/watch?v=rOoizmYBHlo&hd=1
When shopping for a TV I visited several retailers. For the stores who calibrated their displays.... I had a tough time deciding which one to get because they were ALL good. I could not tell which one was LCD, LED, or Plasma. Yes calibration is worth it, but how much do you want to spend?

My macbook is back from repairs. It is not working with my apple led cinema display. It was working prior to the repairs on the laptop. Is there a setting I don't know about that might have been changed?

My macbook pro is just back from repairs. It is not working with my apple led cinema display. I have followed the directions in the cinema display manual. am I missing something?

Take a look at the Displays preference panel to see if everything is ok, particularly the resolution and refresh rate. Displays will probably try to put the panel for the ACD on the ACD where you won't see it. So click "Gather Windows" to get the ACD panel on to your macbook.
One more thing, make sure you fully seated the mini displayport plug. They can be sneaky little devils in that they need to be fully pushed in.

Your TV may not support this resolution or refresh rate.

Hi All,
In the last hour, my apple TV (3rd Gen) has changed the TV resolution (hookup via HDMI directly into a Samsung 720p LED TV). Everything is bigger. No issue since in the past I would just change the resolution manually to 720p 50Hz, but now it will not let me and it says the following:
"Your TV may not support this resolution or refresh rate."
Does this have anything to do with ATV latest software update? Is it that my TV is an older model?
Any and all ideas would be greatly appreciated.
Best,
Bonfoa

Change the Apple TV resolution:
Press and hold the Menu and Up button on your Apple Remote for six seconds.
The Apple TV will automatically cycle to the next resolution at approximately 20 second intervals.
Press Play on the Apple Remote to keep the current resolution or Select to manually cycle to the next resolution.

Refresh rate for a new LED TV...

Hey guys,
It's been a few years, and it's time to upgrade my TV.
A few questions on the refresh rate. Aside from watching movies, I like to play games (on PS4, when I can buy it), and watching primarily sports.
So, in essence, I'm assuming I'd be one who would notice a higher refresh rate? Is there a noticeable difference from 60hz, to 120hz, to 240hz?
Thanks!

Some thoughts...
how much is calibration? how much is that TV?
some say TV's should be calibrated again after 6 months of usage where the TV has had some break-in. How much is that second calibration???
some say they just run on theatre or cinema mode to save costs
some say they don't like the calibration and flip back to the normal, bright or vivid mode. Personally I hate to see the highlights punched out and looseing detail for the brightness
some purchase Spyder or XRite calibration tools
some will use Apps to do their own calibration (note you need a cable or a wireless box), however you don't want someone who is colorblind making those calibration decisions (like me)
https://itunes.apple.com/ca/app/thx-tune-up/id592624594?mt=8
http://www.pcmag.com/article2/0,2817,2414804,00.asp
http://www.youtube.com/watch?v=rOoizmYBHlo&hd=1
When shopping for a TV I visited several retailers. For the stores who calibrated their displays.... I had a tough time deciding which one to get because they were ALL good. I could not tell which one was LCD, LED, or Plasma. Yes calibration is worth it, but how much do you want to spend?

Pixel refresh rate?

I'm using an iBook G4. I was wondering what exactly affects the display's pixel refresh rate. Is there anything I can do to improve it (new drivers, for instance), or anything that would be slowing it down? Or is it purely a hardware issue?
I'm asking because sometimes there's very noticable trailing/ghosting when the images on the screen are moving quickly.

As long as you're up-to-date with Mac OS X (which you are if you have Mac OS X 10.4.9), then you'll have the most recent display drivers that are available from Apple.
Are you noticing this effect on the Desktop? For example, if you move the window of a folder around? Or do you notice it when you're playing a DVD movie? Or maybe a QuickTime movie?
-Doug

Refresh rate set wrong, mini wont work with TV anymore

I have a Mac mini hooked to my conventional TV. I tried setting the refresh rate to 58Hz. I wanted to see if it made the picture any better. The image lost all vertical sync and the image rolls very fast. I thought maybe a confirm dialog box would switch it back to 60Hz after a set time. It didn't
I tried putting it to sleep an waking it. I pulled the plug and restarted it. I reset the PRAM. The mini always switches to the bad refresh rate after start up.
I hooked the mini up to my 23" Cinema Display. Then I can use it fine. However, there was no way to channge the TV settings. I hooked it back up to the TV and it still wouldn't work.
So now I have a mac mini that wont work with a TV. The only thing I want to use it with. The only thing I can think is a last resort. To erase the hard drive and re install Mac OSX from scratch.
Is there anything I can do short of reformating the thing? There really should be a timed out dialog box to confirm the setting, al la (dare I say) Windows XP.

This is a real Catch-22 that has caught a bunch of us. If Apple wants lots of naive users to hook these up to their TVs as media centers, they need to have the kind of recovery mechanism you suggest. In the meantime, when I had the same problem and posted, there were lots of useful suggestions in this thread:
http://discussions.apple.com/message.jspa?messageID=1913178#1913178

Under Windows 7 Ultimate x64 and Boot Camp, my 27 inch Apple LED Cinema Display checks out as a Generic PnP Monitor and is shown as NOT HDCP compliant. I haven't been able to find any kind of an .inf file to use. Does anyone have a solution?

Under Windows 7 Ultimate x64 and Boot Camp, my 27 inch Apple LED Cinema Display checks out as a Generic PnP Monitor and is shown as NOT HDCP compliant. I haven't been able to find any kind of an .inf file to use. Does anyone have a solution? Or is Apple's implementation of HDCP (if it's there) incomplete?

I am having this same issue. Im not sure if this is the cause but I think this is keeping PowerDVD Ultra 11 from playing back Bluray under Windows 7 / Bootcamp

Macs Won't Forget Refresh Rate - LCD Refresh Out of Range

I have a new Viewsonic LCD for an old G4. I had to use an ADC to DVI adapter.
The first time I booted up my Mac, the monitor worked fine. I went into the Display Preferences and, like an idiot, I selected 90 hz because, like an idiot, I thought 90 hz was better than 60 hz.
My screen went black and the monitor said "Frequency out of range", etc. I have talked to AppleCare and I have tried everything and nothing I do gets this Mac to revert to 60 hz at 1280 x 1024.
Tried zapping PRAM, didn't work.
Tried booting into Safe Mode and selecting another resolution. I do that, reboot, it reboots in that lower resolution. I select 1280 x 1024 and my screen goes black because it's going into that 90 hz.
Created another account, didn't work.
I plugged in my old CRT into the VGA port. I was able to select 1280 x 1024 at 60 hz. Turned off the Mac. Plugged in the LCD. Turned the Mac back on and it went black.
It does this when you log in. The actual bootup is in 1280 x 1024 60 hz. I get the login screen fine. It's when I log in, into any account, it goes back to that 90 hz mode.
In Windows, if you select a resolution or refresh rate, a dialog comes up asking you if this mode is OK and if after 15 seconds you don't click on anything, it reverts back to the original resolution. Apple doesn't want to do that, I guess, because they want me to use their monitors.
Any ideas?
Thanks!

You should probably just trash the preferences file(s). That will give you a fresh start with the Viewsonic. See this thread:
http://discussions.apple.com/thread.jspa?messageID=3308488&#3308488

Apple 23" Cinema Refresh Rate (Hz) issue

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