Cpu is slow as heck

[Brian1826]

Hey everybody. I have a Intel celeron n2840 model #233f I'm currently using this laptop for school and gaming but one day this laptop just went from running at 2.1ghz to 0.50ghz. It's completely slow as heck I did all I can to my knowledge of adjusting it to high perforomance and a whole lot of other stuff. As of now it's completely slow and I have no idea what's wrong with it. Please if anyone can give me any pointers of what might be wrong with it, that would be great.

 

[JCLDJB]

Check your CPU temps with HWMonitor or something similar, could either be throttling because of high temps or in a Power Saving Mode.

If temps are high, try opening it up & cleaning the CPU Heatsink, removing all dust (with a can of compressed air - not a hoover).

If your temps are fine, disable any power saving mode.

If your temps are good & power saving mode is not on & the inside is clean, let us know.

 

[Brian1826]

Okay well I did all that I made sure it was set on high performance set the percentage of processor states at 100% for sure it's not on save power mode, I checked temp and it's at 43°c this is while it's idle (assuming idle is when the comp is on and nothing is running) I'm cleaning the fan of any dust atm.

 

[JCLDJB]

If your processor is constantly at 100% then check your Processes Running in your TaskMgr & "End Task" for any that are not necessary and taking up your CP %

Do you have any anti-virus running?

Finally, to avoid ending tasks every boot-up, load up MSCONFIG and select "Start-Up" & disable whatever you don't need at startup.

Monitor that drop from 2.1Ghz to 0.5Ghz, how often it happens, for how long, how long after you boot up your laptop, etc.

EDIT: also, what are you using to monitor the performance drop, fro 2.1ghz -> 0.5ghz ?

 

[Brian1826]

I do have an anti virus n I scanned for virus n all that good stuff, I constantly check the tsk manager to see the drop but now from the second it boots up, it's always at 0.50ghz. I downloaded a app called nzxt, it's an app similar to hwmonitor. The drop has been ongoing since it happened the 1st time. Maybe like twice or 3 times after moving the settings around to high performance etc, it wold go back up to regular speed but maybe 30 min in using the laptop it would drop back to 0.50ghz

 

[Brian1826]

I do have an anti virus n I scanned for virus n all that good stuff, I constantly check the tsk manager to see the drop but now from the second it boots up, it's always at 0.50ghz. I downloaded a app called nzxt, it's an app similar to hwmonitor. The drop has been ongoing since it happened the 1st time. Maybe like twice or 3 times after moving the settings around to high performance etc, it wold go back up to regular speed but maybe 30 min in using the laptop it would drop back to 0.50ghz

 

[JCLDJB]

I'm just thinking outloud but, when I use my AMD A8-7650K (which has 4CPU cores & 6 GPU cores), this APU goes from 3.3Ghz down to 2.8Ghz whenever the iGPU is at 100% usage, this is a feature that limits the voltage input to avoid overvolting resulting in shorter APU lifespan and/or permanent damage.

I don't know if the Intel Celeron processor you have, has a similar feature, but if it's on straight boot-up going down to 0.5Ghz, check your BIOS settings and list what you can amend/what is visible on the CPU-side of things.

The Intel celeron n CPUs were designed to be run on extremely low power, so a 0.5Ghz could be its lowest setting, sorry I keep repeating myself, but I can understand the difficulties in diagnosing such an annoying issue.

And as your CPU only has 1 core, it's not as if you had a Dual Core where 1 failed.

And I do not believe the drop to 0.50ghz has anything to do with a Core failure as you wouldn't be able to start you PC at all.

Did you notice this drop even when your laptop's adaptor was connected & laptop charging or only when disconnected?

FYI: If you have Norton Anti-Virus, it sucks a lot of the CPU usage, I avoid that particular Anti-Virus like the plague!

Also

 

[Brian1826]

I tried changing some settings see if it helped watch some tutorials on how to boost up speed but it was all in failure so I set it back to default. As for the drop, it's for both l. Literally one day I was gaming and just like that it dropped completely and from that day forward connected or not to the adapter, it's been slow. I think I have a duo core processor (it shows 2 cpu n2840 @2.16ghz) (sorry I'm a damn noob in computers) bot sure if that means I have a duo core but if not oh well.

 

[Brian1826]

Another thing I've noticed not sure if this is because it's sitting idle but the fan doesn't turn on as much anymore. The Co outer is on at the moment n I don't hear the fan. The computer isn't overheating but the fan doesn't come on n the computer doesn't really produce much heat.

 

[JCLDJB]

ooops sorry about that, you're right, it does have 2 Cores (don't know how I missed that, single-core processors are obselete now anyways), thing is, if you had a Core issue, you'd be stuck in the lower state permanently...


I have an idea:


***Potential Solution***
I've noticed as well that your CPU has an "Idle State" mode, try disabling your P-State and/or C-State in the BIOS/UEFI, this will stop your PC from going to the Idle state...
***Potential Solution***

 

[SpecsGuy]

I had the same problem with i7-6700K. I went to the BIOS and disabled an option called "Intel Adaptive Thermal Monitor". My motherboard was throttling my CPU because it was thinking it's overheating even at idle temp.

Before you do this, check your CPU's temps. It might be overheating for real. If not then disable this option in the BIOS if you have it.

 

[Brian1826]

I went into the bios but I didn't find anything in that criteria, I honestly think my comp must be fried or somethimg, I disabled a system option in the bios and it went back to 2.15ghz but 30 min's into using the comp, it just dropped back down to 0.50 ghz

 

[JCLDJB]

Most likely due to a Thermal issue.

I cannot see/remember if you had mentioned how long you have had this laptop for?

The average lifespan of the Thermal Paste is approx. 2 years, so if the laptop is any older, try re-applying this, removing the old with almost pure Isopropyl Alcohol, low cost option, worth a go.

As SpecsGuy said (which was the first thing I recommended in the very first response) odwn to temps most likely.

After about 30mins, this means something is heating up inside the laptop, cuasing the throttling.

maybe another components is overheating, worth upgrading yourself to a new laptop, they come quite cheap for a lot better specs than what you currently have.


If spending any more money isn't an option, try the Thermal Paste idea.

GOOD LUCK!