2 Posts
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7604
February 22nd, 2020 18:00
CPU Fan replacement on Optiplex 7010 mini tower
I noticed I had some extra DDR3 memory laying around in an unused broken PC, and decided to upgrade one of my Optiplex 7010 machines from 8GB to 12GB. That all went fine and well, but while running the diagnostic tests on memory, I surely noticed that the CPU fan was dipping slightly below the 1000rpm. I also noticed that the max value was pretty low. I did have some issues with this Optiplex being slower than the other one (identical model) and noticed the CPU temp on this one hovering in lower 50's in the diagnostic screens. The other Optiplex has an Antec PSU and 24GB RAM, bu, otherwise, it's the same machine as this one. I keep wondering if the low fan RPM's are a perfectly normal occurrence, or if this is leading to the CPU running a bit hot. Also, when I run the CPUID HW Monitor, all the core temps look reasonable (30's to early 40's).
I don't think I am going to go and replace the CPU fan just yet before I am sure this is not some other issue, but in case I decide to, would this fan/heatsink work? If not, can you suggest any other ones? I do sort of believe that after 6-7 years of non-stop spinning, some of these fans are bound to fail anyway, sooner rather than later.
bradthetechnut
7 Technologist
7 Technologist
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8.7K Posts
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February 22nd, 2020 19:00
If you do replace the CPU fan, go with Dell OEM. Dell is too proprietary just to have another brand fan plugged into it's MB. The wiring is different.
savvy2
2 Intern
2 Intern
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2.5K Posts
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February 23rd, 2020 06:00
dipping slightly below the 1000rpm
why worry this, the temps are ok
the fans with 4 pins are PWM modulated, that means the thermal sensors are scanned in BIOS
and BIOS keep the fans running at the right RPM the BIOS even fails the FAN POST F1 errors if any fan drops below spec, there is no need to worry fans besides, no lint packup in it or the heat sink (cleaned) or make sure wire never touch the blades,(tie them back)
The BIOS has TABLE for heat/rpm.PWm.
if the BIOS wants to raise RPM say over 1000 due to you say gaming load, the sensor shows hotter and the table PWM is sent to the FAN,but if the fan RPM tachometer shows wrong RPM the BIOS POSTS f1 CPu fan bad.
that is how it works and for sure my better newer PCs, and I can even change the chart. (nice, no?)
end worry this is not some 80s PC with 3 wire blind fans.
but yah 7 years 24/7 wow. Dell fans last, unlike vast others.