Can I keep my iMac running at all the times?

I have iMac, early 2009 version and in good condition. I would like to know, whether I can keep the machine ON at all the times ( 7 * 24hrs) or should I switch it off every night? So far, I am switching it off every night and switch it on the next morning. Please clarify me.

In talking with a tech guy at Applecare, I was told to shut the iMac down--all the way down--every so often. I'd been using "sleep" for months and months, but this chap said the processor is running at about 10% capacity in sleep mode. It was then accumulating signals, loading up the RAM, and slowing down the computer. If you shut down the computer from time to time--stopping the processor completely--the accumulated "noise" is erased, and the computer will run faster as a result.
I've used a lot of vague language here. I'm not sure exactly what happens when you use sleep mode for extended periods, but in following the tech's advice, my mac is running fast and smoothly.
So I'd say, DON'T keep your machine running forever.
FWIW.
Dick B.
Lopez Island, Washington

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Model Name:          iMac
Model Identifier:          iMac7,1
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Number Of Processors:          1
Total Number Of Cores:          2
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http://support.apple.com/kb/HT3964
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utzly wrote:
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Message was edited by: WZZZ

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I did do the verify/repair disk, and there is nothing wrong with the disk. Havent had a chance yet to boot in safe mode. Will post an update shortly but in the meantime:
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Hardware Information:
          MacBook Pro (15-inch, Mid 2009)
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          1 3.06 GHz Intel Core 2 Duo CPU: 2 cores
          4 GB RAM
Video Information:
          NVIDIA GeForce 9400M - VRAM: 256 MB
          NVIDIA GeForce 9600M GT - VRAM: 512 MB
Audio Plug-ins:
          BluetoothAudioPlugIn: Version: 1.0
          AirPlay: Version: 1.9
          AppleAVBAudio: Version: 2.0.0
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System Software:
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          SAMSUNG SSD 830 Series disk0 : (256.06 GB)
                    EFI (disk0s1) <not mounted>: 209.7 MB
                    Macintosh HD (disk0s2) /: 255.2 GB (169.85 GB free)
                    Recovery HD (disk0s3) <not mounted>: 650 MB
          MATSHITADVD-R UJ-868
USB Information:
          Apple Internal Memory Card Reader
          Apple Inc. Built-in iSight
          Apple Inc. BRCM2046 Hub
                    Apple Inc. Bluetooth USB Host Controller
          Apple Inc. Apple Internal Keyboard / Trackpad
          Apple Computer, Inc. IR Receiver
FireWire Information:
Thunderbolt Information:
Kernel Extensions:
Problem System Launch Daemons:
Problem System Launch Agents:
Launch Daemons:
          [loaded] com.adobe.fpsaud.plist
          [loaded] com.adobe.SwitchBoard.plist
          [loaded] com.bombich.ccc.plist
          [loaded] com.google.keystone.daemon.plist
          [loaded] com.microsoft.office.licensing.helper.plist
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          [loaded] com.google.keystone.agent.plist
User Launch Agents:
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          Flash Player
Internet Plug-ins:
          AdobePDFViewer.plugin
          Default Browser.plugin
          Flash Player.plugin
          FlashPlayer-10.6.plugin
          googletalkbrowserplugin.plugin
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Bad Fonts:
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          Auto backup: YES
          Volumes being backed up:
                    Macintosh HD: Disk size: 255.2 GB Disk used: 85.35 GB
          Destinations:
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                    Total size: 749.81 GB
                    Total number of backups: 1
                    Oldest backup: 2013-11-20 14:15:59 +0000
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               3%          WindowServer
               2%          EtreCheck
               0%          fontd
               0%          mtmd
               0%          Dropbox
               0%          mdworker
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               0%          aosnotifyd
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          70 MB    Dropbox
          49 MB    Finder
          49 MB    mds_stores
          41 MB    Dock
          37 MB    WindowServer
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          508 MB Wired RAM
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So I have my G505s (still under warranty thank god) and has been running fine but now it seems that the fan isn't running anywhere near the percentage it should be. I have run energy management fan cleaning, bios is updated, AMD overdrive is downloaded... but it is physically hot and the fan does not change rates of speed. Yes, the power management setting is set at active... I am not even running anything and it is running hot.
Is there a driver or patch that alters the temperature protocols? Because if the fan can run faster, but isn't even when it is hot.... then it isn't serving the purpose.
Lenono please help me... and the fact this is a consistent problem isn't prompting me for reccomendations. If this continues I will be getting the laptop serviced under warranty or replaced because this is ridiculous.
I do run windows classic shell, but that has not been a problem yet.

hi reedbarnes,
Welcome to the Lenovo Forums.
Just to check, when you open AMD Overdrive, what are the values on the CPU frequency and temps?
- Sample image
In addition,is the system running on BIOS v3.00? Looking at the BIOS 3.00 - Summary of changes, this should fix the fan duty if you're getting CPU temps. between 50-90°C.
If you have the BIOS to v3.00 and you're getting high temps (eg. 60°C++) after logging into Windows and there are no startup apps / processes running on the background that's eating up high CPU resources then it's likely that the fan may need to be replaced (or the thermal paste and heatsink as it's not properly conducting the heat out of the APU). In this case, you may need to contact lenovo and report the issue as you may need to send the unit for service.
Support phone list
Regards
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New MBP seems to run hot & fan runs almost all the time

I've had my MBP for just about a week now. It's the new, 15", 2.2 GHz model. It's great, but I notice that it runs hotter than my Powerbook G4 did and the fan is almost always on. It's presently sitting on a wooden topped table. My house is not AC-ed, but the air temp is about 70 F/21 C today. Seems to run hot in my AC-ed faculty office too, when I am there. What is "normal" for this machine. TIA.

David,
Ditto what Ned says. To be sure, 80 C is not too hot (it is the temp that the MBP is designed to maintain as a working maximum), but that you are experiencing this temp at all times indicates that something is pushing the processor at all times.
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Scott

Can I keep my iMac running at all the times?

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