Maybe you have a look on my Serversystem, described on my Homepage http://itnoobz.org/?page=Server. Unfortunately in German :( It only consumes 28 W under high load. Works perfectly till 6 Months. Intel® D2500CCE inkl. Intel® Atom D2500 2x Kingston ValueRAM SO-DIMM 2 GB DDR3-1066 2x Western Digital WD20EURS 2 TB be quiet! Pure Power L7 300W Further Questions? Am 14.01.2013 um 18:47 schrieb SilverTip257 <silvertip257 at gmail.com>: > On Mon, Jan 14, 2013 at 11:20 AM, Matt Garman <matthew.garman at gmail.com>wrote: > >> On Fri, Jan 11, 2013 at 8:55 AM, SilverTip257 <silvertip257 at gmail.com> >> wrote: >>> I'm in search of some hardware that consumes a low amount of power for >> use >>> as a test-bed for Linux, various coding projects, and LAN services. >>> >>> 1) Low power consumption (10-15W ... maybe 30W at most) >>> 2) Must run Linux without too much fuss (CentOS or otherwise) >>> 3) Must have two NICs (fast ethernet or better) >>> 4) Memory - 1GB or better >>> 5) Can be configurable either via serial or VGA. >>> 6) Accepts a normal hard drive, not CF -- drive capacity is my concern. >>> 7) spare PCI slot is a _plus_ (extra NICs or whatever else) >>> 8) I'd like to keep the physical footprint to a minimum (size of a 1U >>> switch or so?) >> >> The lowest-power x86 device I've used is an Alix 2d2 from PCEngines. >> Power consumption was about five watts, regardless of load. This has >> three 100 mbps NICs, a 32-bit x86 AMD Geode CPU, and 256 MB RAM >> soldered to the board. Has a built-in Compact Flash slot to use as a >> "hard drive". I ran OpenBSD on mine for years as a >> firewall/gateway/router for a home LAN (don't see why it wouldn't run >> CentOS). (I'm actually selling mine, email off list if interested.) >> > > The Geode CPUs do not support PAE [0]. While CentOS 5.x would work, 6.x > requires a kernel recompile (not complaining, but noting). > > [0] http://joseph.freivald.com/linux/2010/04/22/alix-centos-image/ > > >> >> I upgraded my firewall device to an Atom-based D2500CCE. IIRC, I >> installed 2x2GB of RAM, booting from a cheap SSD, powered by a >> PicoPSU, and running PFSense. I think this configuration pulls >> roughly 16 watts at idle, maybe a couple more watts when fully loaded. >> This board has dual Intel gigabit ethernet ports. >> >> For my home theater PC, I'm running an ASRock H67M-ITX and Core >> i3-2100 CPU, with 2x4GB of RAM and SSD. I have it inside a Habey >> EMC-800B case, using the included power supply. Idle power >> consumption is about 22 watts. It's been a while since I measured >> power consumption at load, but I'd guess 50--60 watts (it's idle 99% >> of the time though). Note that even when "idle", MythTV seems to use >> a little CPU, so if I kill mythfrontend, my idle power consumption >> drops another watt or two. >> >> Only one NIC on the Asrock board, but it has a PCIe expansion slot so >> you could easily add another. I'd expect an add-on NIC to add around >> one to five watts of power consumption. >> >> My personal workstation uses an Intel DH67GD micro-ATX motherboard, >> i5-2500k CPU, 4x4GB RAM, SSD, and traditional ATX power supply >> (Seasonic SS-300ET). It pulls about 30 watts when idle. Only one NIC >> on that motherboard. >> >> For all the above, I'm talking AC (i.e. at the wall) power >> consumption, in the USA (so 115 Volts), measured with a Kill-A-Watt >> (not high-precision, but should be reasonable within a watt or two). >> What follows is stuff with which I have no personal experience, but >> have read about: >> >> The Intel S1200KP mini-itx motherboard. It has built-in dual gigabit >> NICs, socket 1155, so you can use anything from a Celeron up to a >> Xeon, depending on how much you want to spend and what your >> upper-bound computational needs are. I was considering that for my >> firewall/router replacement. With a PicoPSU I would suspect that one >> could get 20 watts or lower idle power consumption. >> >> With an Intel DQ77KB motherboard, and Pentium G2120, SilentPCReview >> built a system that pulls 16.5 Watts[1]. (The article is a case >> review, but power consumption information is included.) That DQ77KB >> board also has dual gigabit NICs. >> >> You might also be interested in Intel's "NUC - Next Unit of >> Computing"[2]. About 10 watts power consumption for dramatically >> under-clocked i3 CPU. >> >> In general, with modern Sandy/Ivy Bridge CPUs, it's almost trivial to >> build a high-performing system that has 30 watt or less idle power >> consumption. If you cherry-pick components, it's not terribly hard to >> get a system with 20 watt idle power draw. The modern Intel CPUs all >> have roughly the same idle power usage (at least the consumer line, >> not sure about Xeons). That goes for the more expensive low-power >> variants as well. The difference of the low-power variants is their >> upper-bound power consumption is lower than their peers. But you can >> often fake that by deliberately limiting the max frequency in the >> BIOS. Of course, with these "real" CPUs (compared to e.g. Atom), >> power consumption will be much higher when loaded. But from what I've >> read, the "real" CPUs are actually better in the long run, because >> their computation efficiency is so much higher. With something like >> Atom, you get more deterministic power draw, but a severely >> compromised upper-bound on computational power. In your requirements, >> you mentioned "various coding projects". If you are working in a >> compiled language (e.g. C, C++, Java), for substantially large >> projects, your compile times will be painful on Atom, but pleasantly >> fast on a Sandy/Ivy Bridge CPU. >> > > I'll have to keep the 'real' cpu point in mind because after all this box > will be idle much of the time. > > >> >> [1] http://www.silentpcreview.com/Akasa_Euler_Fanless_Thin_ITX_Case >> >> [2] http://www.silentpcreview.com/Intel_NUC_DC3217BY >> _______________________________________________ >> CentOS mailing list >> CentOS at centos.org >> http://lists.centos.org/mailman/listinfo/centos >> > > > Thanks! > -- > ---~~.~~--- > Mike > // SilverTip257 // > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos