> On Jul 20, 2015, at 1:53 AM, Graham Stephens <[email protected]> > wrote: > > On 19/07/2015 20:56, Karel Gardas wrote: >> On Sun, Jul 19, 2015 at 7:51 PM, Raul Miller <[email protected]> wrote: >>> On Sun, Jul 19, 2015 at 11:03 AM, John Long <[email protected]> wrote: >>>> Sun Fire servers are cheap to buy but not to run. A V210 is a 1U box and >>>> with dual 1.35 CPUs it is fast enough for desktop use. It's not something >>>> most people with families or without a flightline headset are going to want >>>> sitting next to their desk though and you will need some air conditioning. >>> >>> Could you clarify this? >>> >>> http://www.andovercg.com/datasheets/sun-fire-v210-server.pdf >>> >>> Suggests that we're talking 320 watts, and 7.3 db acoustic noise. >> >> 320 watts should not be showstopper, but 7.3 db certainly is. I do >> have T2000 which is ~62 dB(A) and this is simply horrible while being >> in the same room. I'm using ear protectors like man uses while working >> with chainsaw and still after few hours I'm head is going in >> circles...But to be honest I'm probably over-sensitive to level of >> noise so you may be in different situation. >> >>> http://www.gcaudio.com/resources/howtos/loudness.html suggests that >>> whispers are about 30 db. >> >> Pay attention especially to: >> >> Perceptions of Increases in Decibel Level >> Imperceptible Change 1dB >> Barely Perceptible Change 3dB >> Clearly Noticeable Change 5dB >> About Twice as Loud 10dB >> About Four Times as Loud 20dB >> >> Anyway those boxes are cheap these days, just win one on ebay and >> enjoy. :-) But if you are going this noisy route, then I would >> certainly recommend SPARC64 VI/VII(+) box. If you are lucky it may be >> for the same price and the cpu should be way faster then ordinary >> 1.3GHz UltraSPARC -- just search thorough spec.org. >> > > Another thing to bear in mind is the pitch of the noise; I find that loudish > but low-frequency sound (like from 4-inch+ fans) isn't that uncomfortable, > but the whine from 1U 1 inch fans get unbearable REALLY quickly.
A prime example of this is the Sun T1000 or the 1U T2 boxes - those fans screech and seem to cut thru any sort of noise or sound deadening at a pitch which is almost painful. Awful stuff. The v2xx boxes aren’t nearly as bad, in comparison - but are still rather loud, especially if warm.
