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iMac Retina Heat management
- Thread starter misho73
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Hi......try the Active Set in default mode. See if that makes a difference.
It does on my late 2012 27in. Fan doesn't get above 1200rpm.
It sure did when the Active Set was off.
GPU-Z under Win 7 reports GPU at max 106c when gaming Shadows of Mordor. Ambient room temp at ~23c. The log file at the end of an hours gaming of SoM is avg temp of 95c.
Don't have the file with me to post it now. Posting from work.
EDIT: Mine is the i7/295X
Just wanted to give you guys an update with my 5K iMac. So before Apple replaced my unit, I experienced GPU heating from simply watching a 4K YouTube video and the fan would ramp up loudly due to that. Now my replacement that I received today is "heat-free". It runs cool when doing the same previous tasks and I've yet to hear the fan! So this might definitely be a hardware issue, at least in my specific experience. I also had some fan ticking noise before and now it's gone on this unit.
Specs same as before:
4.0 GHz i7
32GB RAM
Radeon M295X
512GB SSD
1X Pure awesomeness
Specs same as before:
4.0 GHz i7
32GB RAM
Radeon M295X
512GB SSD
1X Pure awesomeness
Last edited:
Good for you. My GPU ramps up to 100c when I play games under Win7. I haven't actually played a 4k youtube video as yet. I should check this out when I get back home today.
Sounds like the probable cause, either that or some form of retrofit upgrade cooling. Either way it certainly does sound that the 295 GPU needs more care with it's heat management.
I had to test out the 4K youtube video to make sure I didn't receive a lemon like you. All ok here. Max temp is 72c when watching 4K youtube videos.
More precisely, a bleeding edge hardware with Radeon graphic. That is one awesome recipe for disaster
Can we all do this:
1. download iStat from here
2. watch this video here in 4k, full-screen mode on your 5k imac twice in a row
3. post back with a screenshot of iStats, here is mine, my GPU got up to 89C, I have the 4GB version.
1. download iStat from here
2. watch this video here in 4k, full-screen mode on your 5k imac twice in a row
3. post back with a screenshot of iStats, here is mine, my GPU got up to 89C, I have the 4GB version.
62C (CPU 65). Nice quality video, confirms I'm definitely not going to be watching that movie
Maxed-out riMac.62C (CPU 65). Nice quality video, confirms I'm definitely not going to be watching that movie
Your GPU was 62C after watching it twice at 4k in fullscreen? 30C cooler than mine? That doesn't sound right.
Yup, just as the credits were running second time around I pressed command-tab and the GPU temp is in the menu bar (along with the CPU temp). I did pop down the menu too, but it was dropping by the time I could do anything else.
Running at "looks like 3200" with a couple of VMs and various other stuff in the background. I have just been watching some other 4k videos linked to that, the review of the Audi RS7 for example (which is quite a bit longer), CPU up again to just over 60. Now I'm typing in this window it's back to 55.
61 C here. I decided to try it while a Handbrake MKV rip was running, since Handbrake doesn't use GPU but runs CPU hard.
http://imgur.com/VpOyzD5
I love this machine.
So Chrome must be the problem for you? I just reran with Chrome and got the GPU temperature up to 85 C.
Sounds like the problem is Chrome then. But jeez, that's a huge difference. I wonder why Chrome is so much more inefficient.