ReadyNAS 524X CPU Temperature

Hi

I've just acquired one of these second hand.

CPU runs about 69oC with fan on cool.

Environment is rather warm (under stairs) but all other NASes there and much cooler.

Found another couple of threads:

https://community.netgear.com/t5/Using-your-ReadyNAS-in-Business/ReadyNAS-RN524X-CPU-temperature-too-high/td-p/1337323

https://community.netgear.com/t5/Using-your-ReadyNAS-in-Business/ReadyNas-524x-Temperatur-often-just-over-70-C-160-F/td-p/1541473

I took it apart - unfortunately it looks like the heatsink is glued on with an adhesive thermal pad - once I'd carefully popped all the pins out of the heatsink it was still stuck fast and I didn't want to pry - it certainly wasn't thermal paste like all ther others i've upgraded/repasted.

The current Delta AFB0912HH fan just about keeps it cool but its very noisy. Going to try a Noctua NF-A9 but the peak flow and pressure aren't as high as the Delta full pelt according to the specs (but the RPM in OS6 hovers around 2800-2900RPM whereas the max spec is 3200RPM) - so we'll see if it holds the temperature.

What's the max CPU temperature - i've read elsewhere 82oC??

Any other suggestions??

Cheers
A