jwcolby
jwcolby at colbyconsulting.com
Tue Jul 20 14:26:19 CDT 2010
You laugh... I have considered moving it to the basement. The basement is pretty cool all year, and very cool in the winter. Once I get everything migrated to rack mount I could easily drop a little window AC into one of the windows in the basement, and then build a little closet to contain the cold air. Good idea! John W. Colby www.ColbyConsulting.com Michael Bahr wrote: > John, the water cooling is intriguing. I researched it several years ago > when I over-clocked my cpu. I found information on Tom's Hardware that > compared water-cooling to air cooling. The water-cooling did lower the > cpu temp but not as much as they had hoped once the system stabilized. > Comparing this to a **high quality** air cooler the differential was > **not** that great. Again the water-cooler is subject to the ambient > temps. Considering the water-coolers have thier own hazards like leakage, > pump failure, coolant replacement. Some water-coolers circumvent some of > the hazards by being a permanent closed system. But then... Actually > the ultimate cpu cooler uses a refrigerant-type coolant just like your > refrigerator. > > But the main goal I was referring to was not just the cpu but the whole > system. The HD temps need to be controlled. > > I suggest make your system portable. Move it to your living room during > the winter (to save on heating costs) and then move it to the basement > during the summer. :-) > > Mike... > >> 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 >>>> >>> >> -- >> AccessD mailing list >> AccessD at databaseadvisors.com >> http://databaseadvisors.com/mailman/listinfo/accessd >> Website: http://www.databaseadvisors.com >> > >