How are Gaming PC's battery-powered? at

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Old January 22nd, 2005, 11:48 PM   #1
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How are Gaming PC's battery-powered?


I've been looking at the stats of these laptop-based gaming PC's, and it's really puzzling me how they are powering a Pentium 4 @ 3.6Ghz, top-of-the-line mobile graphics chipsets (PCI-express), a huge 17" LCD screen at high resolution, sometimes multiple CD-ROM drives, RAID laptop configurations, etc. off a single 14.4V or 14.8V 6400mAH or 6600mAH rated battery? According to my calculations, that's only 95-100Watt/hours, which isn't even close enough to powering the power-hungry Prescotts (especialy at 3.6Ghz), let alone all these other devices which eat up another 30-40W easily when being run together. Also they're not using multiple batteries in parallel either! Again, seems like it's just one 12-cell, 95W/hr battery.

Then what really astounds me is that they need a 160-190W AC adatper!

Now a lot of these reviews are saying they get around an hour on battery power, even if they're gaming, so I'm wondering, is the performance reduced on battery power? How can they get around the laws of physics?

So I'm a little confused how this is working, and would like to know if anybody can point me in a good direction on where I can find some info.

Jason Rodriguez is offline   Reply With Quote
Old January 23rd, 2005, 12:57 AM   #2
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Location: Toronto, Canada
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Optical drives draw very little power when they're not spinning.
Many wattage figures are only for the device at its maximum... i.e. hard drive draw ~25W when they spin up. While they are running they draw around 10-15W for 7200rpm drives. 4200rpm laptop drives draw less power.

Prescott/Pentium wattage figures cannot be compared to AMD as Intel has different idea about what maximum wattage is. For Pentiums, their wattage figure is based on what Intel thinks is the wattage the processor draws in practical use (or something like that). In games it might be close to that figure.

A lot of laptop parts may also differ from the desktop parts and draw less power... i.e. laptop versions of CPUs, video cards, hard drives, etc. In your case the CPU is not the laptop version so this doesn't apply.
Glenn Chan is offline   Reply With Quote
Old January 23rd, 2005, 09:40 AM   #3
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I would try posting this question on a "Gaming" forum. Who better to ask than the source.
Rhett Allen is offline   Reply

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