[SOLVED] Case fan wavers when I put it on the rear exhaust position

[Jacob 51]

I've installed a case fan just behind the CPU heatsink for exhaust, in such a way that the heatsink's fan pushes air toward the exhaust fan. Its RPM slows down and fastens again in a fraction of seconds. Its not a fan problem as I tested with other fans too. This position is causing it.
My CPU fan is an ANTEC A30.
The CPU fan RPM is not as high to make the fan waver.

The case fan is from the ANT ESPORTS superflow kit.

What could be causing this?

 

[rgd1101]

when you said you test with other fans. are they all from the ant esports superflow kit?

 

[jay32267]

Air flow anomalies can cause strange things to happen and that sounds like what this is.

I would try to physically change the position of something to hopefully break the cycle.

 

[Jacob 51]

when you said you test with other fans. are they all from the ant esports superflow kit?

3 of them are. One non-RGB fan was included in the case (ANT ESPORTS ICE130ag)

 

[Jacob 51]

Air flow anomalies can cause strange things to happen and that sounds like what this is.

I would try to physically change the position of something to hopefully break the cycle.

I tried disconnecting all the other fans, but no luck.

 

[rgd1101]

how is the fan getting power? direct from psu or from the motherboard?

 

[jay32267]

I tried disconnecting all the other fans, but no luck.

I might run without that fan and check temps and if they were good I'd call it a day.
It may not be necessary. Many times...1 or 2 case fans can be disabled....and not much is going to happen.

 

[thepersonwithaface45]

I might run without that fan and check temps and if they were good I'd call it a day.

I don't have a rear exhaust, but I do have 6 push/pull top exhaust on a radiator. Keeps me running cooooooooool

**but I also have 3 front intake and 3 side intake!

 

[Jacob 51]

how is the fan getting power? direct from psu or from the motherboard?

Direct from the PSU. Actually, a controller came in the kit to which all the 3 fans are connected. The controller gets power from SATA power (The same wire that goes to the HDD). the power is not an issue since the fans work correctly when installed elsewhere.

 

[jay32267]

I don't have a rear exhaust, but I do have 6 push/pull top exhaust on a radiator. Keeps me running cooooooooool

**but I also have 3 front intake and 3 side intake!

One way to look it it....if you're pulling more air through than you have too.....you pulling more dirt through too.....even with filters.

Another way to look at is..."cool enough" is "cool enough".

If your cool enough....it's not like getting an extra couple degrees is getting you anything in a practical sense.