Massive difference in performance Bat vs DC

I have had my 570U for a couple weeks now and I LOVE it. Its faster than any dektop I have on my 9 system network at home.

I do want to ask here is something I just noticed is normal.

First some basic info, its a T7200, 2 gig ram, 7200 rpm drive and 7950 GTX from RJTech.

What I did was run Passmark 6.1 and noticed the overall score was TONS lower than it had run when I first got it. 347 as opposed to 659!

I was thinking I had something running in the background, a virus or some other kind of evil. Couldnt find a thing.

Then I realised I had not plugged in the powersupply and the first test was on battery. A couple more tests like turning on the "Always On" confirmed that running battery only the score averaged right at 350, while any power setting on DC scored a massivly higher score. In fact, with "Always On", active and on battery it runs over 673.

Is this normal? No they all dial back that much even when the battery is full but not plugged into a wall?

Are there other settings I havnt found yet? I almost never run on battery so its not a big deal, just curious.

 

That's pretty normal; if the laptop did run at full power settings (i.e. the same settings used while running on AC - or DC - power), the battery would drain much quicker.

 

for such high-end systems, the power consumption is so high that when on battery, it caps off the CPU and GPU (the Powermizer option in the nVidia Control Panel)... to conserve batterylife.

When its plugged in, the system performance will be uncapped to go to full speed when needed.

I know my notebook caps me at 1000mhz when on battery, then when I plug it in, the speed is uncapped dynamically.

You should use Notebook Hardware Control, its very useful for monitoring such things (CPU speed, CPU temp, etc..)

 

Thanks guys. I did indeed find the Nvidia Powermizer settings. The battery setting was(and still is) at minimum.

And thanks for the tip on Notebook Hardware Control. Been messing around with it and learned some things right off the bat.

Thanks again!

 

And they don't just clock them down to help battery life as gophn mentions.
If I recall correctly, the battery is physically unable to supply the power demands required to run the 7900GTX and a dual core processor that is in these babies on full power.
Which is why the power brick is so huge and has its own fan built into it. Take a look at the specs on your brick sometime, then compare it to an "average" laptop.

Did that the other day with mine and a 17" HP a coworker has.
Sager's brick is 130 Watt, 6 Amp, and up to 24V. That's a beast.
The HP was a 90 W, under 20 V, and i think half the Amperage.

 

Hey about that power brick, i'm now often using (whenever not at my desk, where my main brick stays all the time) the Kensington universal 120W power supply. It's **** small and light to supply 120w. To date I had no problem and the thing can charge the batteries (I have both) when I use the system.

I even ordred the retractable cable from the website. What's nice with it is that they use some sort of adapters for all popular devices. Got one for ipod, Palm, Moto headset, etc... You can even use a splitter and charge 2 or more devices.

And last it also supports AC and DC, so you can charge in a car or on a plane.

Nice product!

 

Curious about this, have you had any problem with the length of the power cord? I had been thinking of getting one of these kensington adaptors, but was thrown off by some of the reviews of it, which seemed to say that the length of the actual power cord was really short, making it really difficult to use without being very close to an outlet.

Perhaps this is something they've addressed?