Yep. Fully loaded. Got the same issues as others. I just think this machine will be making toasts and fan will go non-stop. I know what my rMBP was doing when operating in summer.
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AMD Radeon R9 M295X Core Clock Throttling, Heat, and Performance
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Yep. Fully loaded. Got the same issues as others. I just think this machine will be making toasts and fan will go non-stop. I know what my rMBP was doing when operating in summer.
Are you not using climate control, or did you mean that this happens even with climate control?
Edit1 in Englisch und Edit 2 in Deutsch. Was ein Zufall.
Just kidding, I'm German too and just thinks it's kinda funny.
You know you can turn off CPU turbo boost in Bootcamp right? (Power options: Max CPU performance 99%) That reduces i7 temps with at least 10c. This might not have a big impact on GPU temperatures, but should make the iMac system slightly less hot during demanding work AFAIK.
Edit1 in Englisch und Edit 2 in Deutsch. Was ein Zufall.
Just kidding, I'm German too and just thinks it's kinda funny.
Ohhh, this happens when switching between forum
Sound like a good plan.
That sounds like a great idea, but still feel the iMac should be able to handle the heat. after all its apple flagship iMac i7 and with the 295 GFX should have been tested at full speed for hours by apple if not weeks.
although mine is delayed until the 26th I won't be happy to hear loud cooling fans when just browsing or watching video. gaming i expect temps and fans to rise up, but don't want to hear a fan for anything else but heavy load encoding.
I have a I7 3.5 and 780m mac here and its silent in normal use and temps go through the roof. shame they didn't offer the rimac with i7 3.5gz cpu and kept the heat down some.
I get what you're saying, but I still think it's a good idea for people who game regularly on iMacs. Disabling turbo boost should not noticably affect the framerate.
One of the biggest difference between Mac Pro series and other Macs is the cooling system efficiency. AFAIK, the nMP can easily run both GPUs and CPU at 100% without any throttling, and the fan only has to speed up a little bit.
All Mac Pros are designed to run at 100% 24/7.
interestingly enough the heat management in my imac 5k i7 is that bad that when I try handbrake and the cpu/fan goes wild, I noticed that it didn't even go to turbo boost (4.4 ghz) but rather throttled to avg. 3.9 ghz ( measured in 5 separate handbrake session of each 30 minutes).
so I get full fan speed for less than base cpu speed.
so I get full fan speed for less than base cpu speed.
do you think this can be adjusted via Yosemite update? I have 4 days left to decide if I'll send my i7/4 back to Apple. one tough decision was to spend that moeny, now I have another to make. should I send this back or can I live with occasional fan/heat bumps? I am worried about the future and the longevity of this machine.
Actually it seems to be possible to get the Mac Pro to throttle with an artificial workload:
http://anandtech.com/show/7603/mac-pro-review-late-2013/14
I'm currently debating whether to get a 27'' iMac or a 15'' MBP. I was hoping that the iMac would offer lower noise levels compared to the MBP. Now it seems that also the iMac throttles under heavy load, and runs at similar noise levels. It is understandable since the GPU is more powerful. But probably not worth the loss of mobility for me.
if you're a non-gamer and don't use cinema 4d, after effects etc. as your profession, it is no issue. if regularly use games or cpu intensive tasks you have to ask yourself if you can live with the issues of heat and fan noise.
my guess is that imac's design is the issue and no software can fix it unless it throttles performance to less than what the entry 5k can achieve. that's why I'll get an i5/m290x.
Interesting, that's the fact, the nMP can be thermal throttled. However, only under serious power virus artificial load.
On the other hand, the review clearly state that the nMP's thermal core can handle 100% CPU and GPU loads under normal operation for a prolong period of time. And that's what I want to point out, it's how the Mac Pro designed for, and able to perform.
My understanding is that the thermal profile can be improved by software.
I never deal with a mobile GPU, so I am not sure about that. However, in my Mac Pro, I can alter my 7950 Mac Edition card's voltage and frequency, so it's now OCed to improve performance, under volt to reduce heat, and reduce fan noise. Of course, I have to do that by flashing the firmware because there is no software able to adjust those parameters real time under OSX ATM.
Even though, I personally don't recommend anyone to flash their mobile graphic card because it doesn't like the desktop version can have dual ROM, and easy (or relatively cheap) fix if you kill the card. Also, I don't know how much voltage on a mobile chip can be reduced. May be they are already highly optimised, and not much room to improve. However, the chance are there.
Also, on the CPU side, there was a software called "coolbook" long time ago for fixing the thermal issue of the Macbook air. This software again reduce heat by under volt the CPU. I did use this software to fix my wife's 1st gen MBA. It works very well to prevent MBA's thermal throttling, improve performance, and increase battery life. (P.S. Do NOT try this software on your iMac, it's NOT supported at all.)
Of course, I don't think Apple will lower the voltage of the CPU or GPU, because they must make sure the voltage will work on 99% of the processor with a comfortable buffer. Reduce voltage may cause more kernel panic (or crash), that's what they want to avoid. So, I don't think that there will be an official software upgrade to fix this issue. But once again, there still a hope that someone can develop a 3rd party software to improve the situation.
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... people buy macs because they expect them to work smoothly as opposed to pc's.
thinking about thermal improvements of a high priced product as a customer just feels wrong, especially since it's an imac that is supposed to just work.
if i wanted to use my time to improve a new product, I'd become an engineer.
feels like apple expects their customers to test new products for them now.
thinking about thermal improvements of a high priced product as a customer just feels wrong, especially since it's an imac that is supposed to just work.
if i wanted to use my time to improve a new product, I'd become an engineer.
feels like apple expects their customers to test new products for them now.
Yep, unfortunately I am packing this top of the line iMac and sending it back to Apple . My key apps are FCP, Episode, AE, Adobe - I guess I'll wait for a revision and keep my 2012 iMac and rMBP for work. Someone said before, that he/she expects nothing but best from Apple and I feel, that this just not there yet. The screen is stellar, but I just think this machine should turn fans either at the same time (worse scenario) or much later then older generation machine. New i7/4.0 spins the engine in 2 minutes in any coding, export or game menu screen while 2 years older does not chime make sound for the entire working session.
Also, the screen bulges in the bottom where it meets the aluminium case with Apple logo. Almost looks like a wave, like its not glued well together. The fit and finish in that part is not good. I am not making big fuss about light leaks, I just don't feel this machine yet.
Also, the screen bulges in the bottom where it meets the aluminium case with Apple logo. Almost looks like a wave, like its not glued well together. The fit and finish in that part is not good. I am not making big fuss about light leaks, I just don't feel this machine yet.
I received my riMac with the i5 and the R9 M295x. While I love the performance of the upgraded GPU over the base M290x. The lag in the UI is pretty much fixed with the upgraded GPU.
This GPU gets HOT even when doing pretty basic things that are not very taxing the GPU in anyway its commonly at 85 - 90c.
When playing SimCity after just a minute or two of being in game the GPU will be at 100c. Performance of the game under OS X never drops and the fan goes to max RPM to cool it. Its defiantly faster then my 780 from my previous gen iMac but the heat output is a little out there.
It shouldn't have the changes in temp. as fast as it does. Going form 52c to 100c in a minute or two makes me think there is a issue with the way the thermal paste was applied.
This GPU gets HOT even when doing pretty basic things that are not very taxing the GPU in anyway its commonly at 85 - 90c.
When playing SimCity after just a minute or two of being in game the GPU will be at 100c. Performance of the game under OS X never drops and the fan goes to max RPM to cool it. Its defiantly faster then my 780 from my previous gen iMac but the heat output is a little out there.
It shouldn't have the changes in temp. as fast as it does. Going form 52c to 100c in a minute or two makes me think there is a issue with the way the thermal paste was applied.
I brought this subject up weeks ago, and was laughed off these forums because I was crying wolf. Turns out, having returned my RiMac a few days after getting it because of noticing (through iStat) that the GPU was climbing upwards of 105C+ operating basic games and Photoshop, I was right to do so. Apple put a substandard mobile graphics chip into their shiny new product, sadly. I'm going to wait for the next generation.
I don't think its the paste as nobody yet reported cool-no-fan full blast- operation, in any game. Everyone gets the fan up and running in 2-3 minutes in games while CPU is almost chilling... strange. My iMac is already packed and waiting for the pickup. The screen is absolute stellar, but its not worth taking the risk. Its a lot of money and I can;t accept, that this machine is much more noisier in the same task then a previous gen. Simple as that. Its definitely faster, but to me very annoying using it.
On release of the rMac a few of us on here warned of the obvious problems of the AMD GPU's and were by and large shouted down.
Hopefully now it is becoming clearer that Apple have simply cut corners on the release machines and hoped that people would just buy the machines based on the retina screen and nothing else.
These machines will get sorted, just not until at least the first refresh when they'll do the right thing and fit a GPU fit for purpose.
Until then I'll stick with my late 2012 iMac with it's superb 680mx GPU and leave my cash in the bank instead of at Apple towers.
Hopefully now it is becoming clearer that Apple have simply cut corners on the release machines and hoped that people would just buy the machines based on the retina screen and nothing else.
These machines will get sorted, just not until at least the first refresh when they'll do the right thing and fit a GPU fit for purpose.
Until then I'll stick with my late 2012 iMac with it's superb 680mx GPU and leave my cash in the bank instead of at Apple towers.