jwcolby
jwcolby at colbyconsulting.com
Mon Jul 19 12:43:54 CDT 2010
Michael, Yup, yup and yup. Yes, of course the lower the ambient (starting point) the lower all temps from that point. However I really cannot reasonably get the system into a controlled (very cold) environment. As far as the CPU temps go, the best strategy would be water cooling, simply because then the ambient at the surface of the CPU can be controlled directly by the temp of the water, and also because you get high thermal mass fluid removing the heat which is dumped outside of the case. I am moving to a rack mount system. Once that move is complete, I may look at a single water cooling system for all my servers. For the moment, 130F isn't extreme enough to spend time on it. I will be keeping an eye on it though. John W. Colby www.ColbyConsulting.com Michael Bahr wrote: > John, the temps are largely dependent on the evironment. Having your > system in a temperature-controlled room like the host servers do will > lower the temps. Those environment are usually around 60 degrees F. If > you have your system tucked away in your house and the temp is ~75 degrees > F, then you **may be** pushing the limits. > > You really need to find some alternate means to lower the temps. One easy > solution is to find a high velocity fan(s) that you can replace in your > system. It will make some noise but better fan noise than HD noise--:-O. > Maybe a high performance CPU cooler like one from Zalman. > > With my over-clocked system I run a Zalman cooler and a high-velocity fan > which reduced my CPU temps by amost 10 degree C. When I process videos my > CPU jumps up from ~41C to ~55C and stays there for hours on end. I > believe the thermal shutdown of Intel CPU's is around 80 degrees C. The > cooler I can keep things the longer the electronics will last. > > Mike... > >> Michael, >> >> You are right it does look high, and no, I was not particularly stressing >> the system. The problem >> here is that I have 20 hard disks dumping heat into the back part of the >> box. So the CPU is not >> starting at ambient, it is starting at ambient plus disk heat load. >> >> To be honest I do not worry about the CPU until it gets well north of 60C. >> In one of my many >> previous lives I was tasked with running an oven that did a burn in on PC >> boards. We burned in our >> boards at 180 F (80C). Of course those were mil spec and they were not >> expected to run at that temp >> forever but that did convince me that electronics can easily survive the >> occasional forays into >> scorching temps. >> >> The real issue will come when I get a pair of 8 core or 12 core processors >> in the case. These new >> procs are rated to run all cores full tilt at under 125 watts but that >> does add even more heat load >> into the case. >> >> John W. Colby >> www.ColbyConsulting.com >> >> >> Michael Bahr wrote: >>> John, the CPU temp looks unusually high, 55C. Were you playing any >>> games >>> during the testing? Is this the idle temp? >>> >>> Mike... >>> >>>> I bought the Norco 4020 to build a server with. >>>> >>>> http://www.newegg.com/Product/Product.aspx?Item=N82E16811219021&cm_re=4u_rackmount_case-_-11-219-021-_-Product >>>> >>>> I am impressed with the case, though it is consumer grade. It is tough >>>> to >>>> work with however. It >>>> has a fan wall just behind the disk drive cage which leaves exactly two >>>> inches between the fans and >>>> the disk backplanes. Obviously it is impossible to leave the wall in >>>> place and get all of the >>>> cables in, but removing the fan wall is a job for a safe cracker. >>>> >>>> None the less I did so, got 20 disks in and cabled up, then reinserted >>>> the >>>> fan wall, and then >>>> threaded the cables through the holes in the BOTTOM of the fan wall. >>>> Why >>>> on earth they didn't leave >>>> the holes on the top of the fan wall is beyond me but they didn't. >>>> >>>> Anyway, for the first time tonight I tested temps with all 20 drives >>>> inserted and power applied, and >>>> the fan wall operating. I ran a defrag on every volume simultaneously >>>> in >>>> order to cause the disks >>>> to work and generate as much heat as I could cause. >>>> >>>> Below are the temps. >>>> >>>> CPU Temperature 55 ºC >>>> Ctrl Temperature 49 ºC >>>> Power +12V 12.099 V >>>> Power +5V 5.053 V >>>> Power +3.3V 3.328 V >>>> SATA PHY +2.5V 2.528 V >>>> DDR-II +1.8V 1.872 V >>>> PCI-E +1.8V 1.872 V >>>> CPU +1.8V 1.856 V >>>> CPU +1.2V 1.232 V >>>> DDR-II +0.9V 0.928 V >>>> Hdd#1 Temperature 37 ºC >>>> Hdd#2 Temperature 40 ºC >>>> Hdd#3 Temperature 42 ºC >>>> Hdd#4 Temperature 39 ºC >>>> Hdd#5 Temperature 47 ºC >>>> Hdd#6 Temperature 51 ºC >>>> Hdd#7 Temperature 49 ºC >>>> Hdd#8 Temperature 46 ºC >>>> Hdd#9 Temperature 37 ºC >>>> Hdd#10 Temperature 49 ºC >>>> Hdd#11 Temperature 44 ºC >>>> Hdd#12 Temperature 47 ºC >>>> Hdd#13 Temperature 45 ºC >>>> Hdd#14 Temperature 50 ºC >>>> Hdd#15 Temperature 49 ºC >>>> Hdd#16 Temperature 42 ºC >>>> >>>> There are only 16 drives showing because these 16 are cabled up to my >>>> Areca raid co-processor card >>>> which is a 16 port card, and that card provides a utility to watch >>>> these >>>> numbers. The other disks >>>> are not being driven but do have power applied. >>>> >>>> I am satisfied with the temps. Several disks actually hit 53 degrees C >>>> under max stress but that is >>>> acceptable to me. I would like lower temps but I can live with these. >>>> >>>> BTW I am using the Corsair 750W modular PS which is a NICE PS. >>>> >>>> http://www.newegg.com/Product/Product.aspx?Item=N82E16817139010 >>>> >>>> The 12V cables are ribbon cables which makes them very easy to run and >>>> minimizes the air flow >>>> impedance. With only 2 inches to work with between the fans and disks, >>>> I >>>> need all the help I can get. >>>> >>>> -- >>>> John W. Colby >>>> www.ColbyConsulting.com >>>> -- >>>> AccessD mailing list >>>> AccessD at databaseadvisors.com >>>> http://databaseadvisors.com/mailman/listinfo/accessd >>>> Website: http://www.databaseadvisors.com >>>> >>> >> -- >> AccessD mailing list >> AccessD at databaseadvisors.com >> http://databaseadvisors.com/mailman/listinfo/accessd >> Website: http://www.databaseadvisors.com >> > >