Michael Bahr
jedi at charm.net
Tue Jul 20 11:37:43 CDT 2010
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 >