Remove 800MHz throttling on i7, 65W charger, no battery?

[Cola]

Hi all.


I'm currently not having a battery for my X220, and my only Lenovo charger atm. is a 65W version.
Is there anyway to remove the horribly slow 800MHz throttling?

My CPU is the i7-2620M rated at 2.7GHz..


Thanks in advance!
Regards, Frederik.

[600X]

Try updating the BIOS.

[Cola]

Oh yes, I forgot to say, that I've already tried the BIOS update, turned out I already had the newest one. :/

But! I did manage to find a workaround. I downloaded Throttlestop, so now I can manually set the multiplier, so I change the clock of the CPU, making it more usable. ^^

[600X]

Make sure to deactivate turbo and not let it run on max. power all of the time. The X220 uses more than 65W under full load. With no battery installed, I have no idea how it is going compensate the extra power usage.

[Cola]

Okay this is just not smart thinking at all from Lenovo...

To update the BIOS, I need a charged battery to avoid an accidental power-off durang an update....

Guess I'll just have to buy the [censored] battery.

[ZeDestructor]

Actually, I believe the X220 uses the battery as a power regulator/filter (cheaper and simpler this way). At the maximum load of ~50-55W (I tested using Intel Burn Test and FurMark at the same time then grabbed readings off AIDA64), good regulation is essential, which is why the X220 gets limited when used only with the AC adapter. Not that it will fail without, just that Lenovo doesn't wish to risk it using only the on-board regulators.