Are these temperatures normal?

Yeah,

These look very high and the CPU fan is at a blazing speed of at 4200 RPM!

When was the last time you cleaned out the dust, lint and dirt from all of the outer openings around your iMac?

Shutdown your iMac, disconnect everything, even power, and vacuum every opening, slots and ports around your entire iMac. Not just the upper back vent.

Also, it wouldn't hurt to open the access plate where the RAM slots are and do a very light vacuum over that area, as well in case there is dust buildup there,too!

Then reconnect everything and install a temperature monitor like iStat Pro or iStat menus and report back with the temps.

No need to get iStat Pro. You already have an application that should give you what's needed.

Also, expect the temps to go higher when running something graphics intensive as you have been doing.

Those are high, especially for the power supply, but what are the temps ordinarily?

Incoming air at 47C means you are running the computer in a very hot room. You shouldn't expect the internal temps to be very cool under those conditions. When it gets really hot here, I don't run the Mac for long stretches and let it sleep often to cool down.

For comparison, here are mine from iStat Menus. I'm using smcFan Control to boost the fan speeds a bit. (My incoming or ambient temp is giving a false low reading. It's really closer to 25C.)

WZZZ - a side question, please

both yours & Christian's results show a hard drive proximity that's impossibly low - do you know if that's due to iStat menus or a missing sensor, or ...?

andyBall_uk wrote:

WZZZ - a side question, please

both yours & Christian's results show a hard drive proximity that's impossibly low - do you know if that's due to iStat menus or a missing sensor, or ...?

Andy, on mine that's because for the late 2009 iMacs there is no external sensor, a k a hard drive proximity. The reading comes directly through an internal sensor--that's just the SMART temp--with output to the jumper block. So yes that's effectively a missing sensor. But it does give a reading for the internal sensor where you see the WDC etc.

Hardware Monitor, which I also have, shows it as SMART Disk WDC etc. and doesn't look for the external.

Christian, how did the room temp come down so much? You turned on the AC? That CPU of 60C is still pretty high. Follow those instructions for vacuuming.

Thanks