- Jul 4, 2010
- 602
- 0
- 19,060
Hi all,
I Think i might have a damaged amd stock fan
(before you say anything - yes, i will replace it soon!)
but anyway - the base of it looks really scratched up with stock thermal paste applied on top,
and it sounds a bit weird while spinning, kind of sandy/grainy at times,
it's not alot but feels like something that should't be happening...
it was quite loud as well even on silent setting
(gigabyte GA-970A-UD3P board)
so to get it quiet i opened the case and aimed a 92mm case fan at it from a distance...
to my surprise it makes it drop down rpm instantly, you can feel the difference in less than a second,
so now i decided to test things,
i switched off cpu fan control in bios so it should be running 100% all the time,
which i think is around 5000rpm... atleast according to bios reading,
but it's inconsistent .. slightly below 5000 .. and if i aim the case fan at it even on lowest speed from about 10cm distance - it drops rpm down to ~3500 instantly...
how is this possible?
also if i turn up this fan and put it close to the stock fan instead of ramping down it
will spin up over 5000 by some 2 or 3 hundred rpm...
that i could understand but what is going on with the ramping down?
the airflow is so small on low rpms you can hardly feel by putting your hand between the two fans...
what is the max rpm supposed to be on this fan anyway?
I Think i might have a damaged amd stock fan
(before you say anything - yes, i will replace it soon!)
but anyway - the base of it looks really scratched up with stock thermal paste applied on top,
and it sounds a bit weird while spinning, kind of sandy/grainy at times,
it's not alot but feels like something that should't be happening...
it was quite loud as well even on silent setting
(gigabyte GA-970A-UD3P board)
so to get it quiet i opened the case and aimed a 92mm case fan at it from a distance...
to my surprise it makes it drop down rpm instantly, you can feel the difference in less than a second,
so now i decided to test things,
i switched off cpu fan control in bios so it should be running 100% all the time,
which i think is around 5000rpm... atleast according to bios reading,
but it's inconsistent .. slightly below 5000 .. and if i aim the case fan at it even on lowest speed from about 10cm distance - it drops rpm down to ~3500 instantly...
how is this possible?
also if i turn up this fan and put it close to the stock fan instead of ramping down it
will spin up over 5000 by some 2 or 3 hundred rpm...
that i could understand but what is going on with the ramping down?
the airflow is so small on low rpms you can hardly feel by putting your hand between the two fans...
what is the max rpm supposed to be on this fan anyway?
Facebook
Twitter
Instagram