mid-2015 MBP R9 M370X GPU Question

Allistah

macrumors member
Original poster
Apr 19, 2019
70
9
Bay Area, CA
Hey all--

I have a mid-2015 MBP 15" with the dual graphics - the R9 M370X GPU in it. When I use the Intel Power Gadget, I see that the GPU is clocked at ~800 MHz. Then just a bit ago, I fired up Counterstrike for the first time and I saw the GPU start to clock down to 700, then 600, then 500 MHz. Fans were full on, but the temps weren't that high - maybe 70C. Now that I've quit the game, the GPU is staying at 500 MHz.

What controls the speed at which the GPU runs? What would cause it to clock up again? One time I saw it clock up to 1GHz, but I can't remember what I did to cause that.

Any info on this would be appreciated. Just curious more than anything.

Edit: I rebooted and the GPU starts at 750 MHz. Then I loaded up some game in Steam and it clocked all the way down to 450 MHz. Now that everything is closed and cooled off, the GPU is staying at 450 MHz.

I wonder what would make it clock back up to the default of 750 MHz? I tried unplugging the external display, plugging it back in so it would switch between the Intel and AMD GPUs but no change.

Screen Shot 2019-06-23 at 2.25.05 PM.png
 
Last edited:

Webster's Mac

macrumors regular
Dec 18, 2016
236
186
Hey all--

I have a mid-2015 MBP 15" with the dual graphics - the R9 M370X GPU in it. When I use the Intel Power Gadget, I see that the GPU is clocked at ~800 MHz. Then just a bit ago, I fired up Counterstrike for the first time and I saw the GPU start to clock down to 700, then 600, then 500 MHz. Fans were full on, but the temps weren't that high - maybe 70C. Now that I've quit the game, the GPU is staying at 500 MHz.

What controls the speed at which the GPU runs? What would cause it to clock up again? One time I saw it clock up to 1GHz, but I can't remember what I did to cause that.

Any info on this would be appreciated. Just curious more than anything.

Edit: I rebooted and the GPU starts at 750 MHz. Then I loaded up some game in Steam and it clocked all the way down to 450 MHz. Now that everything is closed and cooled off, the GPU is staying at 450 MHz.

I wonder what would make it clock back up to the default of 750 MHz? I tried unplugging the external display, plugging it back in so it would switch between the Intel and AMD GPUs but no change.

View attachment 844636
Intel power gadget shows the stats of the integrated intel GPU, not the Radeon. As far as I know, both GPUs are always “on” but in a low power state when not being used.
 

Allistah

macrumors member
Original poster
Apr 19, 2019
70
9
Bay Area, CA
Ah! Ok, that's why it was confusing the hell out of me. Are there any tools that would allow me to see the clock speed of the AMD R9 M370X GPU? I don't want to change anything, just curious as to what it is running at and such.
 

Allistah

macrumors member
Original poster
Apr 19, 2019
70
9
Bay Area, CA
I spent some time looking and I can't find any info or programs that would expose the clock rate of the R9 M370X GPU. So maybe the clock speed is static and never changes. <Shrug> who knows..