How to make CPU 'adaptive' when on AC...

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SimonCC · #1 Post by **SimonCC** » Sun Nov 21, 2004 4:35 pm

Under the ibm battery maximiser wizard is says that on battery the CPU is adaptive and on AC it is maximum. When i go to power management under control panel in windows it says the CPU is on automatic. Im now confused, is what im being told in control panel differant from what ibm battery wizard is telling me?? If so, how do i make my CPU run on adaptive when on AC??

Thanks!

herbie · #2 Post by **herbie** » Sun Nov 21, 2004 4:45 pm

There are actually two screens in Battery Maximizer's profile configuration. Click on the "plug" symbol to see the AC subprofile.

herbie

SimonCC · #3 Post by **SimonCC** » Sun Nov 21, 2004 4:49 pm

yeah i have done that, but this doesnt let you change anything - on this screen, for AC, the CPU is on maximum.

#4 Post by **jdhurst** » Sun Nov 21, 2004 4:50 pm

I just use Windows Power Management, and select ThinkPad Default scheme and leave CPU power management set to Automatic. The normal state at this setting is 600 Mhz, but if I run an intensive task (load VMware, say), it immediately jumps to 1.8 Ghz. That is what you are looking for, right? I don't think it matters whether you use Battery Maximizer or Windows to achieve this. The ability for the CPU to change is governed by the Intel Speedstep.

BTW, This always worked (on my machine) on AC, but there was a very recent BIOS / Embedded Controller update for the T4x series to make this work better on Battery.

What I don't see in Windows is why Always ON forces the CPU to run at full speed, and why ThinkPad default allows the CPU to run at less than full speed. These two properties are not part of the Battery Maximizer on my ThinkPad.
... JDHurst

SimonCC · #5 Post by **SimonCC** » Sun Nov 21, 2004 4:54 pm

ok, so i assume that when the battery wizard says 'maximum', this relates to 'automatic' in windows power management?

herbie · #6 Post by **herbie** » Sun Nov 21, 2004 4:56 pm

SimonCC wrote:yeah i have done that, but this doesnt let you change anything - on this screen, for AC, the CPU is on maximum.

Left click Battery Maximizer panel applet:

- "View scheme settings"
- right click on profile on the left, "modify"
- press button "change AC power settings"
- make changes
- press "apply AC changes"
- press "save power scheme"

you're done.

herbie

SimonCC · #7 Post by **SimonCC** » Sun Nov 21, 2004 5:03 pm

ok done, does anyone else do this?? Or is this pointless due to the windows powers ettings, in other words, will this have an impact and use the CPU more efficiently??

herbie · #8 Post by **herbie** » Sun Nov 21, 2004 5:15 pm

The "adoptive" setting dynamically reduces cpu clock, and thus reduces power consumption.

For concrete savings, see battery miximizer's status information on current power usage (works on battery usage only). The actual (reduced) cpu clock is shown in windows' control panel -> system window.

herbie

SimonCC · #9 Post by **SimonCC** » Sun Nov 21, 2004 5:21 pm

ok, so to recap, setting max or adaptive for AC is pointless as this only applies to battery.

herbie · #10 Post by **herbie** » Sun Nov 21, 2004 5:23 pm

SimonCC wrote:ok, so to recap, setting max or adaptive for AC is pointless as this only applies to battery.

Nope. That would be pointless.

Information on battery usage is only available in battery mode.

herbie

Plinkerton · #11 Post by **Plinkerton** » Sun Nov 21, 2004 5:56 pm

I don't understand why you would want adaptive on AC anyway? It seems the idea behind adaptive is to save battery power. On AC it doesn't matter.

I have mine for adaptive on battery, and MAX on AC.

Ghostrider · #12 Post by **Ghostrider** » Sun Nov 21, 2004 5:59 pm

Plinkerton wrote:I don't understand why you would want adaptive on AC anyway? It seems the idea behind adaptive is to save battery power. On AC it doesn't matter.

I have mine for adaptive on battery, and MAX on AC.

Maybe he want's to save power and reduce heat which will reduce fan noise.
Parts with lower temps don't age as fast as parts that are runnig hot all the time.

herbie · #13 Post by **herbie** » Sun Nov 21, 2004 6:03 pm

I've mine set to adaptive all the time, since power saving == less heat == less fan activity (hopefully)

#14 Post by **jdhurst** » Sun Nov 21, 2004 8:21 pm

Plinkerton wrote:I don't understand why you would want adaptive on AC anyway? It seems the idea behind adaptive is to save battery power. On AC it doesn't matter.

I have mine for adaptive on battery, and MAX on AC.

I used to do that, but after reading the forums here, I changed to ThinkPad Default on AC, and the machine runs cooler and a bit quieter but picks up instantly I need it. Seems to have be a good move.
... JDHurst

Plinkerton · #15 Post by **Plinkerton** » Sun Nov 21, 2004 9:15 pm

alright jdhurst, I've joined the club. I will now almost always be running on adaptive.

I just set it like that, and my fan isn't running even though I'm on AC! I guess there's a first time for everything...

Thanks guys.

#16 Post by **daeojkim** » Sun Nov 21, 2004 11:17 pm

so i changed to adaptive as well for AC. I had to create a new setting for this to work in battery maximizer. Now it runs on 600MHz with AC as well. and CPU temperature is lower and fan is not blowing like it did before.
This is good... I wondering why I didn't do this before.

Elhabash · #17 Post by **Elhabash** » Mon Nov 22, 2004 8:13 am

Power consumption also matters when on AC. Not that much, but each Wh saved means one Wh less produced.

Small cattle also produce manure...

SimonCC · #18 Post by **SimonCC** » Mon Nov 22, 2004 9:03 am

argh ha ha (evil laugh), vive la revolution!!

RCube · #19 Post by **RCube** » Mon Nov 22, 2004 10:41 am

this is a good idea.. I am going to try it too.

rpwt · #20 Post by **rpwt** » Tue Nov 23, 2004 8:22 am

I just added an "Adaptive AC" scheme too. Works like a champ. Temp according to Mobmeter is now 40 degrees - used to run around 53 all the time.

Why did IBM make it so hard to set the adaptive mode for AC?

I had even gone out and bought a laptop cooler to put under the unit - didn't seem to make any difference.

SimonCC · #21 Post by **SimonCC** » Tue Nov 23, 2004 2:10 pm

I have been using my comp on adative for a few days now and i have to say i am astonished at the differance, the fan is much quieter, the HD palm rest is cooler, the air pumping out from the exhaust is cooler too (as i dont have a CPU thermometer thingy this is my test). As for performance, i cannot see a differance, which is a good thing!

I recommend doing this if you are having issues with heat and noise!

- cool thinkpad, cool dude.

KillaByte · #22 Post by **KillaByte** » Sat Nov 27, 2004 8:04 am

I'd like to set the mode to adaptive when on AC but whenever I do so, after the next reboot it's changed back to maximum

Any ideas?

How to make CPU 'adaptive' when on AC...

How to make CPU 'adaptive' when on AC...

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