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Case fan on CPU fan...

Last response: in Systems
June 11, 2010 12:30:14 PM

I have a small to mid-size tower that I put 1 120 mm case fan and 1 140 mm case fan on the side panel. Now, my question is about the 140 mm case fan. Is it bad that the 140 mm case fan is blowing directly towards the CPU fan? It doesn't seem to be affecting the CPU fan because it is spinning on its own, but will it have an effect on the cooling process since they are basically just blowing the air to each other? If you need more info, please let me know!

More about : case fan cpu fan

a b B Homebuilt system
a b à CPUs
June 11, 2010 12:54:24 PM

You could use CoreTemp or other temp. sensing software to see the temps with your current config., then disconnect a side fan, check the temps, reconnect the side fan and disconnect the other side fan, check the temps. Then choose the config that gives the best results. Don't disconnect the CPU fan.
June 11, 2010 1:29:11 PM

i will try that out. Thanks
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a b B Homebuilt system
a b à CPUs
June 11, 2010 3:23:03 PM

If anything, it may be good that you have this arrangement. It means that the supply of air to the CPU cooler is cool outside fresh air being drawn into the case and sent there by the 140 mm side fan.
June 11, 2010 5:33:16 PM

i hope so. but for some reason the mainboard temp is what gets a little hotter than expected..between 50c and 60c at times when only surfing the internet and on Steam. what could be the cause of that?? or is that normal temp?
June 11, 2010 8:37:28 PM

What's your hardware? Eg a quad core will run hotter than a Pentium 3.
June 11, 2010 8:41:10 PM

AMD Phenom II X4 965 Black Edition Deneb 3.4GHz 4 x 512KB L2 Cache 6MB L3 Cache Socket AM3 140W Quad-Core Processor
9 GB RAM PC3-10600 MB/sec
750 GB SATA 3G (3.0 Gb/sec) 7200 rpm
XFX HD-467X-ZDF2 Radeon HD 4670 1GB 128-bit DDR2 PCI Express 2.0 x16 HDCP Ready Video Card
1 COOLER MASTER R4-S4S-10AK-GP 140mm Case
1 COOLER MASTER R4-L2R-20AC-GP 120mm Blue LED Case Fan
1 COOLER MASTER R4-BM9S-28PK-R0 Blade Master 92mm Case Fan
Topower Zumax 400w ATX Power Supply
June 11, 2010 8:53:43 PM

Try getting the side fan to blow OUT of the case. Thismight work better?
June 11, 2010 8:57:05 PM

Have you got decent-ish thermal paste on the cpu?
a b B Homebuilt system
June 11, 2010 9:42:39 PM

No you're fine. As said it's actually better to have cool air blowing towards the HSF.
June 11, 2010 11:52:56 PM

what thermal paste would be considered "decent-ish?"
June 12, 2010 1:20:32 AM

depends i guess. I consider the "top end" Artic Silver stuff to be overkill in terms of price. But the standard stock stuff is usually cheap shitty mass-bought crap.

PLus it dries out over time - so if its been a while since you replaced it - might be worth having a looksee at least.