Now before you say that it's Intel's SpeedStep technology that kicking in... I highly doubt it is. When the actual clock speed in the BIOS changes... It's something totally different.
Anyways, I have a Inspiron 1520 running an Intel Mobile Core 2 Duo T2750 originally clocked at 2.0 GHz with a maximum clock speed (according to BIOS) of around 2.2 GHz (I don't remember the exact frequency). Oddly enough, this morning, I booted up... Everything seemed fine until I opened up some programs which took longer than usual. Knowing me, I start to investigate... I just defragged yesterday... And all the RAM is seated properly... The only thing left is the CPU. So I boot up System Properties, which only tells you the CPU name and the manufacturer set clock speed... So I boot up Core Temp (very good program by the way) and at first it said something like 789 MHz was the clock... I couldn't believe it and thought it was acting up... So after running a different benchmark... 789 MHz was the confirmed clock speed. It was odd because it never ran this low before... I didn't do anything to it... (Intentionally at least)... No underclocking or overclocking on this system at all... (It's a laptop, you're not supposed to overclock it right?) So what else could be the matter. So after a little short panic, I finally shut down, took out the battery, and after breakfast, (and a little researching and troubleshooting) I turned it back on, it seemed a lot snappier and after checking Core Temp it said that is was back to around 2.0 GHz (SpeedStep of course made that a little lower). I was a little relieved... I also read during troubleshooting that the BIOS may have been messed up or worst of all, erased. So I went back into the BIOS and everything seemed normal until I saw that the processor section said this...
Current Clock Speed: 2.0 GHZ Minimum Clock Speed: 1.5 GHz Maximum Clock Speed: 2.0 GHZ
All these were grayed out because Dell really screws you over on the BIOS.
Now I know for a fact that the minimum and max clock speed are off... It should say Minimum Clock Speed: 1.8 GHz and Max: 2.2 GHZ (or around that) like it did before...
Any ideas? It's really no big deal, as long as my Current Clock Speed is back to normal. It just bugs me a little.
Now as a secondary note, I render with Sony Vegas around once a week and the processor does reach temps of around 150-155 degrees F despite using an external cooling pad and cleaning out the dust within the case.
I appreciate any help and thanks for reading this... I hope you have a Merry Holiday.
And after this entire thing happened, I did find a program designed for Dell Laptops that speeds up the fan... And since then, my temps were around 90 degrees F on idle and 132 F on 100% load.
asked Dec 23 '11 at 15:37
There are several programs you can use. SpeedFan-reads and notifies the temp. of your computer. C-Cleaner- Clears and cleans your registry.
Steps for fixing. I would say to De-fragment your computer. This is an annual maintenance kind of thing but it might help speed up your computer. Also, try running less windows at the same time on your computer. If it goes faster , then you have a weak or worn-down CPU (which obviously, can be a problem). Also scan your computer to try to pick up an error that is going on. I don't know what kind of error you would get , so whatever error you get, "google" it. Hope this does help.
answered Dec 24 '11 at 14:26
Download CPU-Z / CPUID and start it up, make sure you know wehre the cores clock speed is and then go to the control panel, Power options, change the power profile to maximum performance and the clock should go up, then put it on power saver and it should go down. it's best to leave it on Balanced so it can swithc between the 2 when needed.
it's probably just windows power profiles changeing the clock speed when it's not needed.
answered Dec 24 '11 at 17:41