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Volker, |
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> Even my rig - hotter, doesn't reach 300W when I artificially torture the |
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> system. Normal 'max' load is in 200W range. An normal desktop? Under 100. |
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> |
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OK -- just to find out the truth I've attached a kill-a-watt to my current |
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workstation which is ~4yrs old w/ slow cpu and ancient video card but |
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has been upgraded w/ 7 SATA Drives: |
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|
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Idle - ~285W |
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Light Use (emerge --sync) - ~310W |
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Kernel Compile w/ video app running and minor torture- ~340W |
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This is definitely much higher than 100-200W stated above. |
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Anyhow, given that the discussion was about a system lasting ~8yrs, which is |
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twice the current age of my system, I don't think it's unfeasible that future |
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upgrades (especially if video card related or if moving cpu from 2 core to 8 |
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core) could get normal power util 20% higher to ~372W eventually. |
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If you conservatively state that PSU wattage should be 1.66 * normal util (so |
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that PSU is normally running at 60% of peak) then: |
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1.66 * 372 = 617 |
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> So an 800W PSU is stupid in every regard. 650 is way to big. 450 is good |
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> enough. 400W might even be good enough. |
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> |
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OK, I'll agree that 800W is not looking very convincing. I must have bought |
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into the marketing there. Thanks for the correction. |
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However, 650W would seem to be optimal. For less stressful systems, 450 seems |
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OK short term, but I'm not sure whether it would be limiting for a chassis |
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expected to last 8+ yrs w/ whatever upgrades come down the line. |
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Matt |
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-- |
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Matthew Marlowe / 858-400-7430 / DeployLinux Consulting, Inc |
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Professional Linux Hosting and Systems Administration Services |
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www.deploylinux.net * matt@×××××××××××.net |
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'MattM' @ irc.freenode.net |
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