Random observation on power consumption 1 reply

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...burning angel wings to dust

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14th February 2004

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#1 12 years ago

So a friend of mine lent me a Seasonic Power Angel today, and out of curiosity I plugged it in to see what my computer drew in terms of power. The results might surprise you.

Before I move on, here are the specs we're working with: -ASUS A8N-SLI Premium -AMD Athlon 64 3700+ overclocked to 2.8GHz @ 1.535V -2x1024MB OCZ PC3200 EB Platinum @ 3-3-2-8 -2x eVGA 7800GT KO @ 470/1100MHz, in SLI -Four hard drives (WD740GD, 1200JS, 2500KS, 3200KS), none included in this test

All powered by an OCZ Powerstream 520W PSU.

At idle, my system consumes around 230W.

To test consumption, I ran 3DMark06 at the default settings. Here's what I found:

As far as the CPU is concerned, Test #1 (Red Valley) peaked at 275W draw.

For the video card, here are the top five: 1) 404W - Pixel Shader (this is the rock demo) 2) 396W - I think this was Shader Particles (cloud demo)* 3) 386W - Fill Rate, single texturing 4) 382W - Deep Freeze 5) 381W - Firefly Forest

*I've marked this test due to the fact that the draw peaked at 396W; the second-highest reading while running this test was 384W, and I think the 396W draw was due to something elese (such as a power spike.) I've included it here for posterity's sake.

Of course, ymmv. Clearly, G80 cards will draw more power. ATI's top end will also. But this makes for a bit of a jumping-off point, so to speak. Also bear in mind that this test only measured draw from the wall. The Powerstream is somewhere around 75% efficient, so even at 400W wall draw, the system is only consuming 300W or so downstream from the PSU.

Some other figures, in case anyone cares: -Squeezebox 3 with full mods from Red Wine Audio draws about 13W idle. -Headamp GS-1 draws about 6W idle. -Mapletree Audio HD150+ draws about 22W idle. Moral? I dunno... tubes are less efficient than solid state amps?

And if anyone was wondering, I got 5491 3DMarks :)


I would die without GF

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15th March 2006

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#2 12 years ago
C38368;3546248And if anyone was wondering, I got 5491 3DMarks :)

My weakling GS model wants your graphics cards' signatures. :p

(Mind you, I was getting 2500 with a single AGP 6800GT...never bothered to test the 7800GS)