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AMD Radeon R9 M295X Core Clock Throttling, Heat, and Performance
- Thread starter Fenn
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Let me disagree, I have a 2014 i7 M295X 5K iMac since December 2014 and since then it's on 24/7, a lot of 4K videoediting, photo and some game, never an issue, only a great pleasure to work on such an incredible machine.
Honestly I never heard of board that fails either, so all this "heat issue" is a psychological issue
My 2 cents.
Let me disagree, I have a 2014 i7 M295X 5K iMac since December 2014 and since then it's on 24/7, a lot of 4K videoediting, photo and some game, never an issue, only a great pleasure to work on such an incredible machine.
Honestly I never heard of board that fails either, so all this "heat issue" is a psychological issue
My 2 cents.
I concur. Been using it almost 8-10 hours a day since November 2014 with lots of CPU intensive apps.
Been playing latest games in bootcamp.
No issues, no problems.
It’s possible there’s a bunch of dust accumulated causing overheating.
Adhesive strip design is retarded.
Adhesive strip design is retarded.
I routinely blow my out with air duster when needed but I run my 24/7 since last summer and no issues. And I hit that CPU hard almost 95% of the time.
working at repair store and fixing Apple macbooks and imacs on daily basis i can 99% guarantee you will experience this "psychological issue" soon. In fact based on the time you have been using it i can estimate that you have about 13-15 month...Will se what you will say then)Let me disagree, I have a 2014 i7 M295X 5K iMac since December 2014 and since then it's on 24/7, a lot of 4K videoediting, photo and some game, never an issue, only a great pleasure to work on such an incredible machine.
Honestly I never heard of board that fails either, so all this "heat issue" is a psychological issue
My 2 cents.
This won't get all the dust out. You have to go from the inside.
Also I'm talking about GPU performance which regularly thermal throttles, especially because I like to overclock the GPU.
I know I'm replying to some old stuff, but I want to say a few things I never did before.
He said he got it in December 2014, i.e. the moment they came out. How would you have any experience with them failing between April and June 2017, when you wrote this in 2016?– I bought one too just when it came out with the i7 and 295X. Working flawlessly with no throttling hitting both GPU and CPU. Though the fan has been getting slightly more aggressive, now going to 3100RPM under full load (100% everything)
This might come as a shock to you, but if you overclock it, then you're going outside of specifications and whatever throttling then occurs has nothing to do with the product not doing exactly what it was designed for. The iMac can handle the R9 M295X at 850MHz which is its default boost clock. Push it further and the thermal throttling is caused by you, not the product. You can't expect to push a regular SUV as far as an F1 car, even though the SUV has other benefits. Stick to the specs though, and the SUV will deliver exactly what it promises
He said he got it in December 2014, i.e. the moment they came out. How would you have any experience with them failing between April and June 2017, when you wrote this in 2016?– I bought one too just when it came out with the i7 and 295X. Working flawlessly with no throttling hitting both GPU and CPU. Though the fan has been getting slightly more aggressive, now going to 3100RPM under full load (100% everything)
This might come as a shock to you, but if you overclock it, then you're going outside of specifications and whatever throttling then occurs has nothing to do with the product not doing exactly what it was designed for. The iMac can handle the R9 M295X at 850MHz which is its default boost clock. Push it further and the thermal throttling is caused by you, not the product. You can't expect to push a regular SUV as far as an F1 car, even though the SUV has other benefits. Stick to the specs though, and the SUV will deliver exactly what it promises
Because I own one. I owned a iMac with the m295x and now have the 2017 iMac with the 580 and the difference is night and day. I have yet to get the fan to spin up to max with the 580 it was very easy to get that on the m295x.
We can talk about a more silent 580, but about reliability, my M295X is still kicking as day 1, no throttling, no failure, and 24/7/365.
Some people here was worried about lifetime, but so far so good
Some people here was worried about lifetime, but so far so good
We can talk about a more silent 580, but about reliability, my M295X is still kicking as day 1, no throttling, no failure, and 24/7/365.
Some people here was worried about lifetime, but so far so good
With you all the way! Same here!
I'd like to but I have not found anything that will show me the temperatures. The current version of iStat Menus gives no sensors for temp only the fan speed.
Regarding fan speed I have yet to be able to get it to go above 1800 RPM when under a load. My iMac with the m295x would hit the max fan RPM in a few seconds after starting something intensive or a game.
Try HWMonitor. Click on the "binaries" link for the latest version at the top of the page.
It would be awesome if you could post screenshots of the HWMonitor screen under CPU (e.g. Prime95), GPU (e.g. Unigine benchmark), and CPU+GPU load. Make sure to let the benchmark run for a minute or two to stabilize things first.
What config do you have? i5 or i7?
Have 4 screen shots for you. The first is idle temps, second I have Unigine running for a few minutes the GPU went to 89c before the fan started to come up a tiny bit. The third I turned the fan up to 2100 RPM and the GPU temp settled at 84c. Forth screenshot I set the fan to max 2700 RPM and it dropped to between 76 - 78c.
If I didn't touch the fan settings it would stay around the 89 - 90c temp and the fan never gets very high.
This is with a 3.8 GHz i5. I have an i7 also and its not much different.
Very interesting, thanks! Looks like even the new iMac can cool its new GPU pretty well. Even though Unigine puts very little load on the CPU, it's nice to know that it the iMac doesn't need to blast its fans.
Is your i7 a 2017 model as well? I wouldn't expect it to be much different at idle or when only the GPU is stressed. If you stress the CPU (e.g. with Prime95), I bet the i7 will run a fair bit hotter than the i5.
what cpu do you have ?
[doublepost=1497378294][/doublepost]we are intresting with the i7+580 combo under load, since the last m295x has not so many issues with the i5 but with the i7
Do you mind to try the following on the new iMac?
1) Luxmark 3 stress test on the CPU, leave it in background and then
2) Furmark full screen, native resolution, no AA on the GPU, keep it on the screen
3) let both run together for 5min
4) and then capture the fan / temperature history?
May be it's a bit hard to capture the real time data when Furmark occupy the full screen. History should be good enough. Million thanks in advance.
1) Luxmark 3 stress test on the CPU, leave it in background and then
2) Furmark full screen, native resolution, no AA on the GPU, keep it on the screen
3) let both run together for 5min
4) and then capture the fan / temperature history?
May be it's a bit hard to capture the real time data when Furmark occupy the full screen. History should be good enough. Million thanks in advance.
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Regardless of anything else, this is super impressive. My iMac's fan sometimes goes to 3100RPM to cool my 4790K + R9 M295X. Cooling the 580 at 1800RPM in itself is an incredible accomplishment.