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| Thread ID: 95146 | 2008-11-26 03:22:00 | CPU Fan Speed | bk T (215) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 723033 | 2008-11-26 03:22:00 | 2 computers, both Intel Q9550 with original heatsink & fan; Gigabyte MB but different model. Computer A: when turning ON, the fan spins really fast (can physically hear the spinning noise) and then slows down to pretty quiet after a few seconds. Computer B: the fan spins quite constantly after turning ON; no noticeable noise when starting the computer. Of course, I do hear the speed increases when running certain programs after Windows has loaded. Are they both 'normal'? |
bk T (215) | ||
| 723034 | 2008-11-26 03:29:00 | They may have features like Intel Speedstep (en.wikipedia.org) Or it'll be one of the other features of the CPU, thats slowing / speeding the fans up Both will have options in the BIOS, to enable / disable this |
Speedy Gonzales (78) | ||
| 723035 | 2008-11-26 05:07:00 | I always thought Speedstep is turned on by default on all motherboards supporting the technology (most if not all modern motherboards should). Some fans have spinup cycles where they rotate at around 80%-100% of their max speed. They are controlled by the BIOS. So as long as Speedstep is doing its job by slowing the CPU and its fan down when it's not needed too much and speeding them up when needed, you don't need to worry. My last motherboard did the spinup cycle on my CPU fan - my new P5K didn't. |
qazwsxokmijn (102) | ||
| 723036 | 2008-11-26 05:42:00 | Altho it depends on WHAT power scheme you've set your system to, whether Speedstep works or not. From what I've read. If its on Home its disabled. Even, if its enabled in the BIOS It needs to be on anything else, but Home to work The 4 engine program for this PC, it slows the CPU fan and the fans connected to the mobo down to 1/2 speed (depending on what setting you put it on), to save power and so would probably create less heat as well |
Speedy Gonzales (78) | ||
| 723037 | 2008-11-26 06:22:00 | Similar to that - Gigabyte have whats called " Smart Fan Control" - In the BIOS under the health settings from memory, this means the fan either stops or slows down / speeds up depending on the heat of the CPU. If you are doing any sort of work / gaming then the fan speeds up as required. For people that dont know of this feature it can cause quite a scare when the PC first starts - the fan may give a slight "kick" then stops completely until the system gets hot enough - you can disable it in the BIOS so the fan spins at a consistent rate. |
wainuitech (129) | ||
| 723038 | 2008-11-26 06:25:00 | Yup I've noticed it here, reboot the fans (2) it sound like something on steroids ...once it gets into windows.. you can hear them slow down to 1/2 speed (one of the case fans shut off completely) This is because of the Fourengine program settings |
Speedy Gonzales (78) | ||
| 723039 | 2008-11-26 06:57:00 | Similar to that - Gigabyte have whats called " Smart Fan Control" - In the BIOS under the health settings from memory, this means the fan either stops or slows down / speeds up depending on the heat of the CPU. If you are doing any sort of work / gaming then the fan speeds up as required. For people that dont know of this feature it can cause quite a scare when the PC first starts - the fan may give a slight "kick" then stops completely until the system gets hot enough - you can disable it in the BIOS so the fan spins at a consistent rate. This is what exactly my computer A is behaving, but computer B is not - the fan is more or less constant from the moment it starts. It does increases speed when running certain games program. Both the machines are using Gigabyte MB (different model). I think the 'smart fan control' IS enabled in the BIOS. Does it mean that it is not functioning properly? |
bk T (215) | ||
| 723040 | 2008-11-26 07:29:00 | This is what exactly my computer A is behaving, but computer B is not - the fan is more or less constant from the moment it starts. It does increases speed when running certain games program. Both the machines are using Gigabyte MB (different model). I think the 'smart fan control' IS enabled in the BIOS. Does it mean that it is not functioning properly? If the Smart Fan control IS enabled that means it should slow and speed up as needed. On the odd occasion I have had to disable, then renable, then disable again to get it to work (shut off). You'll soon see if it is disabled as the CPU fan will start up and run at a consistent speed right away from a start / restart. Also depending on the other components that may differ between machines one may act differently to another. |
wainuitech (129) | ||
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