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| Thread ID: 59300 | 2005-06-27 21:55:00 | How cold can you run a PIV? | Greven (91) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 367449 | 2005-06-27 21:55:00 | How cold can you run a pentium 4 processor before you damage it? My friend is running his at negative 25 degrees & I told him it would be dead within a couple of years if he keeps running it that far below the reccomended temperature range. I can't remember why it is bad to run your CPU too cold, so can someone please enlighten me or correct me if I am wrong? | Greven (91) | ||
| 367450 | 2005-06-27 23:12:00 | It shouldnt be a prob. I've seen different websites showing pics of P4's below -24 -25 degrees. Its better colder than hotter. |
Speedy Gonzales (78) | ||
| 367451 | 2005-06-27 23:25:00 | The main problem as far as I can see would be condensation, which could cause corrosion and/or other problems. Then there is also the question of a greater than normal 'thermal shock' if the cooling system is not running all the time. The continued dimensional expansion and contraction could possibly cause problems with time. |
Terry Porritt (14) | ||
| 367452 | 2005-06-28 02:15:00 | The thermal range should be OK ... 20 to -25 gives 45 degrees, comparable with 20 to 70 degrees. One of the many problems which stopped IBM's development of a Josephson junction computer was the thermal range between liquid helium temperature and ambient (250 degrees), as well as the (thermal) problems of getting data in and out. I don't think they could use optical I/O, so there were a lot of copper wires going into the cryostat. But the dew and icing will probably be a major problem. The dehumidifier action might be safer with proper drainage. The motherboard isn't going to like getting wet each time the cooler is turned off. |
Graham L (2) | ||
| 367453 | 2005-06-28 02:33:00 | The thermal range should be OK ... 20 to -25 gives 45 degrees, comparable with 20 to 70 degrees. One of the many problems which stopped IBM's development of a Josephson junction computer was the thermal range between liquid helium temperature and ambient (250 degrees), as well as the (thermal) problems of getting data in and out. I don't think they could use optical I/O, so there were a lot of copper wires going into the cryostat. But the dew and icing will probably be a major problem. The dehumidifier action might be safer with proper drainage. The motherboard isn't going to like getting wet each time the cooler is turned off. Graham ol Buddy, When you die is there any chance I can have your brain? |
Metla (12) | ||
| 367454 | 2005-06-28 04:12:00 | Graham ol Buddy, When you die is there any chance I can have your brain?Problem with that, he will be the only one that knows how to wire it up for you. | Rob99 (151) | ||
| 367455 | 2005-06-28 04:25:00 | ......er.....I was going to use it for a hat. Lmao. Perhaps it would make me look smart....... :D |
Metla (12) | ||
| 367456 | 2005-06-28 06:09:00 | Download the installation manual here (www.asetek.com(Complete%20Manual)%20v2.1.zip) and note how much paste they use to fill the socket and cover the CPU pins. I've taken a few pics of the manual seing it's 10MB to download: Pic 1 (sal.neoburn.net), Pic 2 (sal.neoburn.net), Pic 3 (sal.neoburn.net), Pic 4 (sal.neoburn.net) It's a huge amount of paste and a little messy. This prevents condensation around the CPU socket & motherboard and stop CPU pin rot. Basically there is a huge covering of foam around the socket as well to keep the condensation minimal. To add to that they also have heaters on the underside of the motherboard and above the first foam layer to help keep the condensation away. Basically all the cooling now is on the top of the CPU core, nowhere else. Everything else is sealed off and the two heaters help keep the motherboard at a stable temperature. Mine's only at -13°C idle and goes to about 10°C load at 4Ghz+. The temperature on the front of the case is the evaporator temp which is about 10°C lower than the CPU temp on average. But people with VapoChill LSs run theirs at -30°C and lower without any problems for years. http://forum.vapochill.com/ www.xtremesystems.org forums.extremeoverclocking.com You could have a look round these forums for people that have lost their motherboards/CPUs or whatever due to the cold temperatures. I think you'll be hard pressed to find someone. More likely the hardware will die due to overvolting, modding etc rather than the cold temps. And even if it died after a few years, I could just pick up another one for 1/4 the price. :) |
E|im (87) | ||
| 367457 | 2005-06-28 21:28:00 | If anyone is interested in the phsyics, The problem you get when you alter the temp of a semi-conductor (like a CPU) downward is the electrons in the semiconductive parts loose energy, and dropping down an energy state and stopping conducion. Essentually turning your complex circurt etched on silicon into a block of insulation. Conversly if you heat it up too much too many electrons go to a high energy state, and the whole block turns into a conductor, shorting every pin to every other pin. -Qyiet |
qyiet (6730) | ||
| 367458 | 2005-06-28 22:32:00 | How cold can you run a pentium 4 processor before you damage it? My friend is running his at negative 25 degrees & I told him it would be dead within a couple of years if he keeps running it that far below the reccomended temperature range. I can't remember why it is bad to run your CPU too cold, so can someone please enlighten me or correct me if I am wrong? how is your friend cooling the cpu? |
Prescott (11) | ||
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