21.5 iMac GeForce 9400 - Low Refresh Rate

Anyone have a 21.5" iMac with GeForce 9400 10.6.6? Playing the movie below, I only get about ~30 fps playback according to QuickTime Player 7's info window, and according to the frame meter in Quartz Debug. For you fellow coders, even CVDisplayLink callbacks only go at ~30 fps.
I've freshly restarted the machine, and there's nothing odd installed on the system at all. It really appears there's a hardware problem with not being able to get to 60 fps.
http://www.sethwillits.com/temp/60fpsMovie.mov

Could be a bad memory problem or an issue with Parallels. Try booting into Safe Mode and see if the panics cease.

Similar Messages

Low refresh rate

I have problems with my display, Benq g2225hda -- its refresh rate is 60Hz, although it should be more.
This is the part of xorg.conf, generated by nvidia-xconfig:
Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 28.0 - 33.0
VertRefresh 43.0 - 72.0
Option "DPMS"
EndSection
With empty xorg.conf, the rate is the same.
I'm not sure what to do. Please, help me and my eyes! :-)

its refresh rate is 60Hz, although it should be more.
Are you sure it should be more?
In the monitor page on BenQ site there is no mention of higher refresh rate.
Is the monitor resolution right? Have you checked in the monitor OSD?
With empty xorg.conf, the rate is the same.
*Without* xorg.conf and only with the bundled 10-evdev.conf and 10-quirks.conf files in /etc/xorg.conf.d the problem persist?
Is the command "nvidia-settings --load-config-only" launched when you log in your user session? If so try removing it.

IMac refresh rate

Does anyone know the refresh rate of the new iMac? The reason I am asking is low refresh rates sometimes gives me a headache and I can't seem to find this info any where on apple's site. I have a feeling I am not looking in the right section but I'm not totally sure.
Thanks,
Tony

There is NO Refresh Rate on LCD screens. That number is for the times per second the Scanning Guns of a CRT monitor redraws the screen, usually in the 60 to 75 (also could be as high as 85) times a second the screen is scanned/redrawn.
You can see that if you take a picture at a fast shutter speed of a CRT TV or computer monitor as part of the screen will be black or dark.
With a LCD screen it is redrawn all at the same time and is basically continuous.
If you are getting headaches from LCD screens then there is something wrong with the screen or your head.
Although with the new LED backlit screens it does pulsate the LEDs as they are One brightness, constant, and the way they lower the screen brightness is to turn the LED lights on and off at different rates to simulate a dimmer screen brightness.
There is a Long thread on this on this forum.

OS 10.3.9 defaults to a refresh rate that is too high for my monitor.

Hello experts!
I bought a great little NOVA 15" LCD VGA monitor which I love since it has a TV tuner built-in. It is capable of 1024 * 768 @ 56 to 75 Hz. Unfortunately, from start-up Panther uses a default of 85 Hz whenever this monitor is the only one attached, and nothing gets displayed.
I can leave the Mac on and swap VGA out to my old Apple 15" Multi-scan and the desktop is there. Now that I can see what I'm doing, I can change the refresh rate from 85 Hz to 75 or 70 or 60 Hz. Still leaving the Mac on and switching the VGA output back to the NOVA LCD results in a normally displayed picture at any of the 3 lower refresh rates. But if I open Display Preferences and press the Detect Displays button, the desktop disappears and the NOVA monitor indicates "no signal." As you may have guessed, Panther is trying to give it 85 Hz again.
The monitor is DDC 1/2b compatible, and the ATI 9200 is DDC 2a/b compatible, so they should be sending the right info to each-other.
What I would like is for someone to tell me how to make the Finder change the Monitor settings to 1024 * 768 @ 70 Hz in a way that can be assigned to a Function key (say F5). That way, when the Mac has finished starting-up, I can just press F5, and even though the screen is blank the Finder will run a little program to change the monitor settings and, voila, I will have a working display.
I have looked into Apple Script, but it seems to have no control over this sort of function (unless I have missed something).
Many thanks in advance, and Happy New Year!
1.1GHz G3 B&W, ATI 9200, 512MB RAM Mac OS X (10.3.9) Logitech gaming mouse MX510

The router is much, much newer than the computer, perhaps some characteristic of the WiFi network as it's currently setup is preventing the computer from connecting.
Try to go back to the basics: set your WiFi network to "b" mode only (i.e., turn off "g") and termporarily remove the password from it. See if the computer will at least establish a connection at that point. Then start turning on one thing at a time ("g" mode, then security, etc).
Not sure what format your WEP key is, but if it's not 10 characters (the minimum for the standard, which constitutes a 64-bit key), you can try making it that long. If it's 13 or 26 characters, it might be a higher encryption than the computer can support.
If all else fails, you could try looking on ebay/craigslist for a copy of Tiger to install on the iMac, which would have software support for more WiFi encryption schemes. Also, it would provide software support for USB WiFi adapters that would also be able to connect to more modern networks.

Satellite M55-s3315: Screen refresh rate is 60 Hertz?!

I have bought Toshiba m55-s3315 analog m50-s.... with intel 910 built-in, shared dynamic 128 mb memory; screen - 14.0" WXGA widescreen display with Toshiba TruBrite . Only refresh rate i get is 60 Hertz. I have updated intel chip software and toshiba also ... I would like to know is it possible to get more than 60 Hertz. The only way is to get 85 Hertz is to add extarnal monitor. I there oportinity to get at least 75 Hertz screen refresh rate ??? It was possible with my old HP Pavilion ze 5000.
May be someone could explain me??
Thank in advance!!!

Hi
I have noticed that on some Toshiba notebooks the screen refresh rate is fixed on 60 Hz. I have two of them. On Tecra M1 is fixed and on Satellite 1900 not. I have tested it and there is no difference if the refresh rate is changed.
The TFT technology is much better than on usual monitors where the display flickering is visible on lower refresh rate. On display you will not see any flickering. In my opinion there is no reason for panic.
Enjoy the life!!!

Need custom refresh rates to fix whining/squealing CRT

My new-to-me 2005 eMac is in excellent condition, except for the fact that its built-in CRT monitor whines/squeals at lower refresh rates. The only resolution with a high enough refresh rate to prevent whining is 800x600 (112 Hz). At least in OS 10.4 on my eMac, I can only choose one refresh rate for the built-in monitor per resolution in System Preferences => Displays (all other refresh rates grayed out).
*I need a procedure that will enable me to choose the highest possible refresh rates for resolutions of 1024x768 or higher.* Surfing the internet isn't much fun at 800x600! I understand that using an improper refresh rate will probably lessen the life of the CRT, but my eMac was rather inexpensive and need only last until I've finished saving for a new Mac Mini or MacBook. I've tried shareware programs such as DisplayConfigX and MoniTOR without success. *I think that SwitchResX is flexible enough to do what I need if I input the correct settings, but I do not know what those correct settings might be.*
Thanks in advance for your help!

Thanks for your reply. I agree with you that the eMac's normal refresh rates look fine. The problem is that any normal refresh rate below 112 Hz causes the CRT in my eMac to make an irritating high pitched sound; I think that the CRT is dying.
I've read online that it might be possible to repair the CRT itself, but I have neither the experience nor the tools to safely do such repair work (at least not without a lot of guidance) and it would probably cost more that the eMac is worth to pay an experienced technician to do the work. Using higher-than-normal refresh rates would definitely be the best solution for me.

Refresh Rates

Does anyone know the refresh rates of Apple's notebook computers? I can't seem to find this info any place. The reason I am asking is low refresh rates sometimes gives me a headache. I'm looking at the macbook pro and maybe the air.
Thanks,
Tony

I know that my 27" Apple Thunderbolt Display has a refresh rate of 59.95 Hz - but only because it's listed in Wikipedia. That's the only source that I know that you might visit to find refresh rates on specific models.
This Wiki article doesn't list the various refresh rates that may be on the MacBook Pros, though. I suppose it depends on the screen manufacturer...
Sorry,
Clinton

Refresh rate HP 850 G1 (Intel 4400)

Hi all, I have a HP 850 G1 laptop and in general I'm very happy with it. In the past I only had a slight issue with screen flickering at lower brightness settings, but setting the refresh rate to 40p hz resolved that issue. After updating to Windows 10, however, it was no longer possible to set the refresh rate to 40p hz. Since I hoped reverting back to Windows 8 would solve it, I performed a factory reset. I am currently using Windows 8 again but it's still not possible to switch to 40p hz, not even through the Intel Custom Mode App. The graphics report from the Intel graphics control panel confirms that the monitor supports the1920x1080x40p hz mode. Any help/suggestions to enable the 40p hz setting again is greatly appreciated! Driver Version: 10.18.14.4251
Operating System: Windows* 8 Pro (6.2.9200)
Default Language: Dutch (Netherlands)
Physical Memory: 3993 MB
Vendor ID: 8086
Device ID: 0A16
Device Revision: 09
Video BIOS: 2175.1
Current Resolution: 1920 x 1080
Processor: Intel(R) Core(TM) i5-4200U CPU @ 1.60GHz
Processor Speed: 2295 MHz
Processor Graphics in Use: Intel(R) HD Graphics 4400
Shader Version: 5.0
OpenGL* Version: 4.3
OpenCL* Version: 1.2
* Microsoft DirectX* *
Runtime Version: 11.1
Hardware-Supported Version: 11.1
* Devices connected to the Graphics Accelerator *
Active Displays: 1
* Built-in Display *
Display Type: Digital
DDC2 Protocol: Supported
Gamma: 2.2
Connector Type: Embedded DisplayPort
Device Type: Built-in Display
Maximum Image Size
Horizontal Size: 13.39 inches
Vertical Size: 7.48 inches
Supported Modes
1920 x 1080 (60p Hz)
1920 x 1080 (40p Hz) Raw EDID:
00 FF FF FF FF FF FF 00 0D AE C2 15 00 00 00 00
04 17 01 04 95 22 13 78 02 46 35 9E 57 57 94 27
14 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 B4 3B 80 4A 71 38 34 40 5A 3C
69 00 58 C2 10 00 00 1A CD 27 80 4A 71 38 34 40
5A 3C 69 00 58 C2 10 00 00 1A 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02
00 0C 33 FF 0F 3C 96 21 14 33 96 00 00 00 00 70

Hi
I have noticed that on some Toshiba notebooks the screen refresh rate is fixed on 60 Hz. I have two of them. On Tecra M1 is fixed and on Satellite 1900 not. I have tested it and there is no difference if the refresh rate is changed.
The TFT technology is much better than on usual monitors where the display flickering is visible on lower refresh rate. On display you will not see any flickering. In my opinion there is no reason for panic.
Enjoy the life!!!

24" iMac refresh rate

I am having all those horrible problem with battlefield 2142 that everyone else is having, but i just found the file that has all the configurations for the game, such as the screen resolutions. My normal resolution is at 1920x1200, but the game resolution is stuck at 1024x800 @ 60hz. i tried to enter the larger resolutions including 1920x1200 but the game just crashes. SO thinking about it i think i have the wrong refresh rate. i went through system preferences and at the refresh rate says "n/a" as seen here....
!http://farm2.static.flickr.com/1165/1427575277e25330d756o.jpg!
i also checked system profiler... nothing....
!http://farm2.static.flickr.com/1237/1428482292a9cb9b3555o.jpg!
that being said does anyone know the refresh rates for the reolutions of the 24" iMac?
the help would be greatly appreciated by many including myself x100....

Roger Wilmut1 wrote:
I suspect that 'refresh rate' is only applicable to CRT monitors: my flat-panel iMac has it greyed out as well.
Not sure if the lack of refresh rate selection is normal for an iMac, but I can defnitely select the refresh for my 17" LCD monitor.
It seems more likely that the game simply won't work at higher than 1024x800 - particularly as 1920x1200 is a widescreen format and the game very likely wants a 4x3 format. Try setting your monitor to 1024x768
Some games will refuse to run at resolutions lower than 1024x768 or 800x600, but I've never heard of a game that would refuse to be set at a higher resolution…

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.

Refresh rate on iMac

I'm not really sure if this is the right place for this post, so forgive me.
I am wondering why the refresh rate on my iMac (latest generation, Intel, 20in) says n/a for the refresh rate. I would very much like to know what the refresh rate is, and if thats impossible, why is it impossible?

Ammendment to my previous post: the going out of focus is not a random thing at all . I've just noticed when it happens: it seems like my screen is cut into 4 halves depending on the mouse position...
Let me explain: when my mouse pointer is in the lower half of the screen, the image is all clear. When it goes to the upper half, the image goes slightly out of focus, mainly noticeable on text (very slight so that it's annoying, but one can still read it). That's for the "2 first halves".
Now when the pointer of the mouse is in the left half of the screen, the image shifts sideways by less than a millimeter. Not much, but noticeable enough to be annoying. And when the pointer is in the other half, it goes back to where it was initially.
Has anyone else encountered this problem?
Cheers,
N

Second display refresh rate lower in Mac OSX than Windows

I use a Mitsubishi Diamond Pro 2070SB CRT monitor connected to my MacBok via a miniDVI to VGA adapter; I span the desktop on both monitors (i.e. I do not use the Mirror Displays option). I use this configuration in both Mac OSX and Windows (via bootcamp). On Windows, I can set the refreesh rate of my CRT monitor to 75 Hz at 1600x1200, but I am stuck to 60 Hz on Mac OSX at 1600x1200. To get a more respectable refresh rate on my CRT, I need to lower the resolution to 1400x1050.
Obviously, the video card of the MacBook can handle a second display at 1600x1200 at 75 Hz since I can do that on Windows. Any ideas how to get the same result on Mac OSX?

Either DisplayConfigX or SwitchRes X should be able to remedy this. But I am at a loss to explain why OS X would itself not allow for the 75Hz choice.

IMac 20" refresh rates question

How do I find out what refresh rates are supported on my iMac 20" Core Duo? I don't see anything in system profiler and or the display preferences.

Also, are there any versions of ATI Catalyst drivers made for the Radeon X1600's that come in these?

What should my screen refresh rate be?

Hi guys, ive never really understood the refresh rate for screens. I have a geforce 4 ti4200, and my refresh rate is 60hertz, what should it be, or whats the best? Thanks sasarchiver

100 and more is the best for your eyes. 85 is the lower limit for "blindness"..... ; 60Hz is the lowest possible of your monitor and can harm your sight when long-acting.
you have max. vertical and horizontal freq. of your monitor and a screen resolution (for example horizontal 1024x768 vertical)
so you will know the max vertical freq. by counting: (max horizontal freq of your monitor)/(vertical screen resolution)*(0,95)=max refresh rate
eg: you have max 110kHz of horizontal freq. and screen resolution of 1024x768
so: (110000/768)*0,95=136Hz
this is the max refresh but the graphics cards sopports only 120Hz so you choose 120Hz in your graphics driver 120Hz for this resolution.

Gx620 HDMI higher refresh rates

Hello,
I've bought a Samsung SyncMaster 2233rz to get a lower inputlag and higher refresh rates. GeForce 9600m GT doesn't have a DVI-D port, thus I'm using the HDMI port with a DVI-D adapter as the monitor only has a DVI-D port. I've read you couldn't get a higher than 60hz signal from the graphics card through HDMI for some reason (..it being a mobile card). I'd imagine it has something to do with the bandwidth, but so far I've managed to get atleast 1680x1050 @ 75hz. It stutters sometimes, but quite rarely.
The refresh rate options are very limited as I use Windows 7, which reads the EDID-information from the display. Nvidia control panel registers the connectors as HDMI - HDTV. I've tried editing the EDID-informations and use powerstrip and such programs to get a higher refresh rate, but so far I'm stuck at 75hz. I wouldn't mind lowering the resolution to get atleast 100hz refresh rate, but so far I've had no luck with it. Have any of you managed to get a 100hz refresh rate from gx620 (through the vga-port perhaps)?
BR,
Exa

Quote from: Henry on 03-February-11, 19:15:00
Read this: http://www.ehow.com/about_5067955_refresh-rate-computer.html
Refresh rate is actually a term for analog CRT monitors, not digital monitors.
Hello,
I know how it works on LCD's. That wasn't the question, thanks though.
BR,
Exa
EDIT: I posted about the issue in Nvidias forum, here's the url incase it gets answers
http://forums.nvidia.com/index.php?showtopic=192351

21.5 iMac GeForce 9400 - Low Refresh Rate

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