I see a big problem with these calculations. You are assuming that the system is not running any type of power saving mode. For current athlon64/opteron processors with cool and quiet running the processor will consume around 25W.
<br><br>Also at work I have an opteron 248 server with 4GB of PC3200 ECC DDR, dual processor board, 2 power supplies and 18 X 250 GB WD SATA drives and the entire system draws ~300W under full load as reported by the apc ups that it is connected.
<br><br>John<br><br><div><span class="gmail_quote">On 7/16/06, <b class="gmail_sendername">Brad Templeton</b> <<a href="mailto:brad+myth@templetons.com">brad+myth@templetons.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
On Fri, Jul 14, 2006 at 08:03:08PM -0700, dave johnson wrote:<br>> -11x200GB Seagate 7200.8 PATA HD ($43/ea - massive tripple-rebate coupon-hell at Fry's and a lot of<br>> trust-worthy friends. It took almost 3 months to get the rebates and one was denied because I
<br>> probably filled one out wrong, so add $70 for "my mistake." ;)<br><br><br>How many watts are these drives? Typically one sees 7 to 15w for such drives (slower<br>drives, 4500 or 5400 rpm are usually better - quieter, cooler, lower power, longer life).
<br><br>With your two PSs how much power are you drawing for the whole system? 200 to 300<br>watts? More?<br><br>In California (you said you went to Fry's) incremental power has gotten up to 19 cents/kwh.<br><br>That means 300 watts, running 24/7 costs $500 per year. (In winter you save a bit
<br>from the heat it gives you, but not a lot. In summer you may be paying it back<br>in AC costs if you need AC.)<br><br>Even in places with cheaper 10 cent/kwh power, it's still almost $250 per year for<br>the power.<br>
<br>Forget about the damage to the environment, 11x200gb is just a bad way to do it<br>from an economic standpoint. They have 500gb drives in Fry's for $175 I think.<br><br>So 5x500gb could do 2 TB RAID-5 if you really need RAID (you don't in my view, this is
<br>not a system that needs 100% availability) for a bit more money ($875 for drives vs.<br>$540 for the 11x200gb without doing rebates, and without 2 power supplies.<br><br>But more to the point it would draw a lot less power, and make up the difference
<br>in a year or so. Quieter and smaller too.<br><br><br>> Never under estimate the power of the K.I.S.S. method :)<br><br>Never forget that power is becoming the most expensive component of any always-on PC,<br>especially in California and other places with expensive power.
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