"Processor in a box" fan...

[shiato storm]

AMD's 'processor in a box' for their Athlon64 comes with heatsink and fan. apparently this is an 80mm fan, mine hasn't arrived yet. anyone got the spec.s for this one at all? I have a couple of 80mm Panaflos that are near silent so was wondering if one of these would work just as well, or is the airflow not enough? I know for an Athlon xp2100 i could get away with a 80-60mm converter and slap the 80mm fan on, and thus sort of increases the air flowing over the heatsink keeping it all nice and cool. but i'm not familiar with the demands of the amd 64's.
ideally i want a silent pc, but if i could use the bits i already have that would obviously be better (cause its much cheaper!!)...any tips?

[BUFF]

mine are 70mm iirc

[Ceryndrion]

mine has a 70mm delta on it.

[shiato storm]

is it loud? or rather could I squeeze an 80mm on there and still be ok (perhaps needs adaptor or something) i.e. airflow required isn't huge thus an 80mm would cover it nicely (esp. since it'll be a quiet one!)

[silon]

it is loud only when it passes the 5000rpm mark, 4000~4500 would be what i consider to be *enough* and ask it to shut up, and @5500rpm [around the max speed] u can REALLY hear it howl

dont worry though, if your internal case temps are low, the fan will spin at low rpms...
the only time mine reaches those crazy 5500rpms is when i game, which, i have the audio so loud i dun hear it at all

[nvening]

so does the cpu automatically adjust the fan speed?

[schmunk]

There is a temperature sensor inside the chip package - this sends a signal which allows for regulation of HSF fan speed. Similar sensors on the mobo allow for case fan speed regulation. This can sometimes be done in BIOS or otherwise using a program such as Speedfan.

[BUFF]

not to mention Cool 'n' Quiet

[schmunk]

not to mention Cool 'n' Quiet

Indeed.

[silon]

There is a temperature sensor inside the chip package - this sends a signal which allows for regulation of HSF fan speed. Similar sensors on the mobo allow for case fan speed regulation. This can sometimes be done in BIOS or otherwise using a program such as Speedfan.

i always thought the speed of the fan was determined by the ambient temps...


example: my room averages at 30C/[90F i think] and the fan easily goes to 5500rpm when the cpu is stressed
on lower room temps [24C], the fan doesnt even touch 4500rpm, though the CPU temp is the same.....

[shiato storm]

your room temp is 30c! what, you live in the tropics???!

[schmunk]

It depends where you have your fan plugged in:

If you have it plugged in to the CPU fan header (usually Fan1, nearest the CPU, but not always) then it will be controlled by CPU temp.

If you have it plugged into a Case fan header (any other) then it will be controlled by internal temps in the case, which will be directly controlled by the external temperature.

30degC is a hot room

[shiato storm]

normal room temperature is taken as 20C, with a variance of 2C up or down...
30C would mean you live on a beach in an equatorial country achieving more than 8hours of sunlight a day. oh and your computer would die pretty quick too cause the temperature gradient from cpu temp of 40 to 'room temp' or 30 would not be sufficient. thats when you need water coling and a fridge.

[silon]

yes indeeeeed.. i live in the tropics

errrmm well... idles at 43C and maxes at 55C i dont see much serious wear n' there...


im thinking: if the cpu fan speed is determined by the CPU temp, then why is it that the fan speeds arent always the same everytime the cpu temp [is say] xC?
and yes, ive plugged it into the CPU header on my asus a8v...
could it be cool n quiet? i heard it also controls fan speed?

[nvening]

so whats the point in a fan controler then?

[RDL]

Cool 'N' Quiet will automatically adjust fan speeds depending on what the computer is doing. For example if it is idle it may turn fans off, whereas if it is under heavy load it will turn them up. Fan controllers are still much better. You can set them yourself, they have more settings, they can be connected to more fans and they are more reliable really, as you can have whichever preference you want. Cool 'N' Quiet automatically adjusts fans at different temperatures, but if you know the temperatures of your own rig well then fan controllers are much better.