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Windows 7: Cannot increase refresh rate above 60Hz


29 Sep 2013   #1

Windows 7 Professional x64
 
 
Cannot increase refresh rate above 60Hz

I'm using Windows Server 2008 as this computer started out as a backup RAID5 server that I later decided to combine as a HTPC. I know this is a windows 7 forum but as I understand, server 2008 is based on windows 7.

I cannot increase my screen refresh rate above 60Hz. I believe this is causing the screen to flicker somewhat and giving me headaches after some time.

Here's the hardware I'm running:
  • Graphics Card: ATI Radeon HD 5450
  • Monitor: LG 50" Plasma (LG 50pk250) connected via DVI to HDMI cable
CCC reports as the software and driver installed are the latest versions. (Catalyst version 11.12, and Driver Package Version 8.92)


LG site says the TV has a max refresh of 600Hz; CCC panel information says max reported refresh rate of 70Hz. I'm inclined to believe the 70Hz as the 600 is most likely some sort of overdrive.



When I go to the Desktop Properties in CCC, I have resolution at 1080p, 32-bit color quality, and refresh rate of 60Hz with no option to go higher.


In Windows > Display > Screen Resolution options, it says Display: LG TV, Resolution 1080. Then I go into advanced settings > monitor tab; it says Generic PnP Monitor in Monitor Type and Monitor Settings has no option to go above 60 Hz.


Any suggestions as to what I can do?


My System SpecsSystem Spec
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29 Sep 2013   #2
Microsoft MVP

Win 7 Ultimate x64
 
 

Quote:
LG site says the TV has a max refresh of 600Hz
Might want to read what it says again. You are confusing refresh rate with sub field drive rate,

What is 600Hz Sub Field Drive? – Plasma TV Sub-Field Drive Explained

That said maybe try updating the driver as the one you currently have installed is getting close to 3 years old.
My System SpecsSystem Spec
29 Sep 2013   #3

Windows 7 Professional x64
 
 

Yeah, I didn't expect 600Hz to be a legit refresh rate but I'd hope to be able to get more than 60Hz.

CCC said the driver it was up to date but looking on the website, there is a new one available. I'll give it a shot

Thanks
My System SpecsSystem Spec
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29 Sep 2013   #4

Windows 7 Professional x64
 
 

While installing the New CCC,I got a spp.DLL missing error so I went to msconfig and enabled boot into safe mode to search for malware and such. Now I'm stuck in an endless reboot loop as soon as the logon screen loads
My System SpecsSystem Spec
29 Sep 2013   #5
Microsoft MVP

Windows 7 Ultimate X64 SP1
 
 

CCC has been very buggy and causes a lot of issues we've seen here. Can you boot into Advanced option and run a system restore? Option Two here: System Restore

I think, but may be wrong, that a refresh rate is hard wired in the monitor if it is a LCD or LED.

If you lack a disk: Advanced Boot Options
My System SpecsSystem Spec
29 Sep 2013   #6

Windows 7 Professional x64
 
 

I found that if I hit f8 during boot, I could select 'last known good configuration' and then it booted into safe mode. Weird.

Ran spybot search&destroy, superantispyware, and malwarebytes. Slight overkill but wanted to be sure. Didn't find anything of importance, just tracking cookies.

Just finished running sfc /scannow and it didn't find any errors. Still getting the missing spp.DLL message. Going to run a registry cleaner now to see if that helps.

My TV's a plasma so hopefully I can increase the refresh rate but its not looking promising at this point
My System SpecsSystem Spec
29 Sep 2013   #7

Windows 7 Professional 32-bit/Windows 8 64-bit/Win7 Pro64-bit
 
 

Maybe your computer is using VSync or maybe for some reason your graphics card can only handle up to 60hz. Could you try another monitor?
My System SpecsSystem Spec
29 Sep 2013   #8

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

The TV has specific accepted rates for different resolutions. Assuming you are connected via HDMI at 1920 x 1080 the max refresh rate is 66.587Hz, but it is a precise number your video card is unlikely capable of. Therefore it is setting at the closest natural rate.



That 600Hz refresh rate of the plasma is for video, not a PC refresh rate. I don't think you can get the exact accepted rate unless your PC software has such fine adjustments.

A Guy
My System SpecsSystem Spec
29 Sep 2013   #9
Microsoft MVP

Windows 7 Ultimate X64 SP1
 
 

I would not use Spybot on Windows 7 it will cause freezes or crashes and conglict with other programs.
For the registry clean use only CCleaner from the link in my sig.
My System SpecsSystem Spec
29 Sep 2013   #10

Windows 7 Home Premium 64bit
 
 

When using CCleaner first analyze the registry.
If your not sure of what to delete then leave it alone as Windows 7 does a good job of keeping things in order.

This is just coming from an old geezer who has not had a BSOD on either computers.
Dennis
My System SpecsSystem Spec
Reply

 Cannot increase refresh rate above 60Hz




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