I have a Lenovo E495 3500U which if on battery runs @ 0.4Ghz and when connected to power runs normal. Is it a sign of a dying battery?
The battery charges and dischages normally.
The battery charges and dischages normally.
Nope, nothing but standard Lenovo stuff.Check your power options in Windows settings. Do you have any third party software like Throttle Stop installed?
I've seen people with similar problems, but as it clocks normally when on power I doubt it is heat related.I don't normally install any extra Lenovo software on Lenovo laptops (I give them all a clean Windows install then drivers only), but it might be worth checking whatever you have installed for any "energy saving" settings.
The only other reason I can think of that would cause a laptop processor to clock that low is if the CPU fan had failed, I saw that once on a Lenovo laptop with a Core i3-6006. If it's happy to clock up while on the mains then it can't be the fan.
Just booting up the computer. Which takes forever @ 0.4Ghz.What tasks are you performing when you encounter this?
It's an old laptop +3 years, I already went into the BIOS, and no interesting options to change.That's weird. Is this a new laptop? I saw some mentions of a setting in BIOS to set the laptop for "maximum performance" when on battery. Most said it made no difference but maybe it will for you?
OK so this is a new problem then?It's an old laptop +3 years, I already went into the BIOS, and no interesting options to change.
No, a colleague got the laptop exchanged about a year ago because he was experiencing slowdowns, and I've had it lying around as a spare computer students can borrow if their computer is in for reparation. I just had to use it myself for a task and then tried to look into why it felt so sluggish and found out why.OK so this is a new problem then?
Gotcha. It's wild that there are no real fixes mentioned anywhere on the web. I agree with some others that believe it may be a battery capacity issue. Maybe try and run this battery report built into Windows?No, a colleague got the laptop exchanged about a year ago because he was experiencing slowdowns, and I've had it lying around as a spare computer students can borrow if their computer is in for reparation. I just had to use it myself for a task and then tried to look into why it felt so sluggish and found out why.
Did you do this?Check your power options in Windows settings.
Yes, I've tried max performance and min CPU frequency to 50% on battery, it still drops to 0,4 as soon as the cord is unplugged.Did you do this?
I realize you stated it takes forever to boot, suggesting lower speed from the start, but perhaps it just takes forever to finish booting once the processor speed is stepped down?
What if you put it under full load, like running Prime95, does it not step up frequency then?
If you don't have a Lenovo app installed to manage power, what if you install one (if you can find one), and see if that allows changing this behavior? How about a bios update?
Yeah, could be software glitch somewhere reducing CPU clock to 0.4Ghz on battery, no matter what.A laptop clocking down the processor because of a faulty battery would be a new one on me; not saying it's 100% wrong, I would just be very surprised if it was a thing.