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5680 performance drop when on battery

post #1 of 15
10/1/03 at 5:45am
Thread Starter 
I understand the CPU and graphics card clockdown when on battery power - I just want to know how to control it, if thats possible. I can't find any options within the BIOS or battery options or graphics card options.

I know in regard to the CPU people have said "it's in the BIOS" but I've yet to find where (on the 5680). Any more specific comments relating to this, and the GPU?
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post #2 of 15
10/1/03 at 12:50pm
Quote:
I understand the CPU and graphics card clockdown when on battery power
I don't think this is true. I certainly hope not considering the poor battery life.

There are no options in the BIOS for such. Please join me in the request for this feature.
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post #3 of 15
10/1/03 at 1:49pm
While i havent done rigourous testing, i cant say that i have seen mine drop in performance at all...
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post #4 of 15
10/1/03 at 2:55pm
It is a known fact that pretty much everything gets throttled down. GPU (games like BF1942 get noticably laggy while theyre perfect on AC power), CPU (this is a no-brainer), etc. Even the hard drives get throttled down as I actually notice that Windows takes longer to boot...

Unfortunately, it appears as they removed the power controls from the BIOS. Big disappointment for me.
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post #5 of 15
10/1/03 at 3:11pm
Quote:
Originally posted by mmarkin
It is a known fact that pretty much everything gets throttled down.
Really? Where is the documentation to support this?

My guess is that Sager or Clevo, forewent any such thing in order to get the new system out as fast as possible. Perhaps a new bios release will remedy this.
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post #6 of 15
10/1/03 at 3:13pm
Quote:
Originally posted by sonicwind
Really? Where is the documentation to support this?

My guess is that Sager or Clevo, forewent any such thing in order to get the new system out as fast as possible. Perhaps a new bios release will remedy this.
Ok, Ok, it is an observed fact.
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post #7 of 15
10/1/03 at 3:30pm
Well you can't throttle down the hard drive(s).

What is most likely happening is to reduce the CPU clock, the FSB clock is reduced, that would reduce memory bandwidth, and access to all devices on the PCI Bus, etc. including the hard drives.

The GPU would be on its own clockdown feature, and on the 5680 and 8890 is the only device which was *designed* to throttle down.

BTW, you can clock the CPU speed in realtime with WCPUID. Test it on both AC and battery and the CPU speed will drop on battery if the power saving is enabled.
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post #8 of 15
10/1/03 at 3:33pm
Using wCPUid, I'm showing:

3200.21 MHz with AC
3200.00 MHz on battery

It doesn't clock down the proc, as far as I can see.

I don't know about GPU, but I get the same performance on various benchmarks with and without the AC.
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post #9 of 15
10/1/03 at 3:44pm
AH-HA! I knew it, a full 0.21 Mhz drop when on battery power. That's a 0.0065625% drop! I'll bet your battery just lasts, and lasts, but you can barely run notepad, huh?
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post #10 of 15
10/1/03 at 4:10pm
Thread Starter 
OK, if the CPU doesn't clock down, it has to be the GPU, and I'm wondering if there is any way to control this. It is immidiately obvious when playing any game (Jedi Knight II, WarCraft 3, UT2K3) that performance goes way down when on battery, to the point that I need to turn down the resolution a few notches. Any help available?
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post #11 of 15
10/1/03 at 4:53pm
That's wierd. I'll have to test that out myself. You could get a gpu overclocking utility. They have utilities to show the current processor and memory speed and adjust these.
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post #12 of 15
10/1/03 at 4:58pm
naw.. the GPU dont clock down either.. i have tested that much.. :P
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post #13 of 15
10/1/03 at 4:59pm
Desktop CPU's can be throttled. I am not sure if this will save battery life - though one suggests it would because you are not using the CPU's full potential)
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post #14 of 15
10/1/03 at 5:03pm
Quote:
Originally posted by Bratag
Desktop CPU's can be throttled. I am not sure if this will save battery life - though one suggests it would because you are not using the CPU's full potential)
Yes, but the FSB has to be throttled with it, AFAIK anyway. I could be wrong...on my Think600x the FSB goes down to like 10mhz with the CPU at 50mhz or so, but CPU speed also varies with CPU usage on my particular system.

Quote:
AH-HA! I knew it, a full 0.21 Mhz drop when on battery power. That's a 0.0065625% drop! I'll bet your battery just lasts, and lasts, but you can barely run notepad, huh?
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post #15 of 15
10/1/03 at 6:47pm
This is crap; the BIOS controls are gone and Windowz is too afraid of letting users control power settings. How TF do we control it then??!!
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