j"1LAnZuoQdcKCkpDBKQMCgziGMoPC4VQUckM³<div class="post"><div class="quoteheader"><a href="https://bitcointalk.org/index.php?topic=955.msg11816#msg11816">Quote from: jimbobway on September 01, 2010, 03:11:17 AM</a></div><div class="quote"><div class="quoteheader"><a href="https://bitcointalk.org/index.php?topic=955.msg11808#msg11808">Quote from: Ground Loop on September 01, 2010, 01:11:37 AM</a></div><div class="quote">The article is all about the cost of the hardware, neglecting the more significant cost: electricity.<br/><br/>Once you're above baseline power of 11 kWh/day (as any geek is), Southern California utilities get about $0.13/kwh marginal, with taxes, distribution, etc.<br/>The 24-core beast built in the article probably draws some serious current. Hard to guess how much, but I'd guess about 500W? Anyone know?<br/></div><br/>The 24-core beast will draw a minimum of 380W (using the power supply calculator: <a href="http://educations.newegg.com/tool/psucalc/index.html">http://educations.newegg.com/tool/psucalc/index.html</a>)<br/></div><br/>What you have calculated is the power requirements of system with a single Phenom II X4 processor, the article talks about 6 such processors in one system.<br/><br/>A single Phenom II X4 consumes at full load approximately 125W (see TDP: <a href="http://en.wikipedia.org/wiki/AMD_Phenom">http://en.wikipedia.org/wiki/AMD_Phenom</a>), 6 such cores would consume about 750W, so a full system including memory, video, motherboard, will draw about 900W, assuming a 1000W power supply unit (a somewhat pricey device which is oddly forgotten in the article) with an efficiency of around 80% you can expect drawing over 1 kW 24/7 running such a system. Assuming 1kW and you pay 0.15ct for each kWh that would be about 3.60 every day on power consumption. That's a little bit more than the value of generating one block (which gives you 50 bitcoins).<br/><br/>As you're expected to generate one block each day, <b>you would actually lose money generating bitcoins</b>, even when you got that $2000 system for free. Of course this is assuming you pay a more or less standard price for electricity, don't have any excess self-generated electricity, you don't recycle waste heat, ...<br/><br/></div> text/html
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