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Drivers & Software

ivana
Journeyman III

APU Kaveri: poor performance due energy saving &/or driver bug. Suggestion to improve

Hello.

Subject

APU includes CPU and iGPU. Both consume energy and generate heat. The whole chip has a certain limit TDP. When one APU component is idle, then another can operate at full speed. However, both components at the same time to run at full speed cannot, because it would lead to a significant excess of the limit TDP. When it is necessary to work with both components at the same time, one of them is force reduced the speed. Often inhibited CPU to 3000 MHz, iGPU running at full speed. However, there is another way: CPU runs at full speed and force iGPU inhibited. Some applications greatly decreases performance due inhibition of one of the Component APU.

My applications (games) list that lose in performance

- Anno 2070. Settings: 720p, low preset. Performance: 30 FPS on land in 1 mission of the company. Monitoring captures drawdown frequency iGPU. I found a bug in the driver which can sometimes engage in this game all the performance APU. It is necessary to change the game in windowed mode instead of full screen, and then at the same graphics settings get 50 FPS! There both components operate at full speed.

- Thief. This game is demanding and the CPU and GPU. CPU running at full speed, but iGPU decelerated to 533 MHz instead of 720 MHz. Settings: Mantle=on, low preset, 720p. Min FPS in benchmark is 20. [UPD] DOF=high (normal + mantle = crash). [UPD]  This behavior is in the driver version 15.11 Crimson. But it was not in the driver Catalyst Omega 14.12. It was 25-27 FPS in this game, but now - only 19-20 FPS.

- Styx: Master of Shadows. There slowed down the CPU to 3000 MHz. Task Manager detects a high load on the CPU. Average FPS is high, but occasionally slows sharply.

- Lego Harry Potter 5-7 years. Sags frequency iGPU. Average FPS is very high, but sometimes there are sharp brake with any graphics settings.

- Team Fotress 2. This game is very demanding to the CPU. There CPU is at full speed, but iGPU strongly inhibited. Low and medium settings - normal. However, high and very high - brakes.

- Left 4 Dead 2. There CPU is at full speed, but iGPU strongly inhibited. Medium and high settings - normal. However, very high - brakes.

- Portal 2. There CPU is at full speed, but iGPU strongly inhibited. Medium and high settings - normal. However, very high - brakes.

To be continued ... Please help me to expand the list.

Suggestion / request

Energy saving can be controlled via the driver. I propose a simple solution: allow me (under my responsibility) to disable the limit TDP in Catalyst overdrive. Let A10-7850K TDP to 125 watts instead of 95 watts. Maybe some motherboards have the BIOS appropriate option. In my Gigabyte GA-F2A88XN-WIFI (mimi-ITX) not. The board has a heatsink on the VRM. I have a good cooling of the CPU. I have a good box is blown. I contacted with Gigabyte. There I was redirected to AMD.

I ask AMD to make an optional program overclocking in Catalyst overdrive. Please. I believe that it will not give AMD high cost of money and time.

My complaint and request to AMD

Before I buying a product, I did not know anything about energy saving technologies. AMD has not informed about this. When I decided to buy this product, I thought that frequencies will be permanent. But it was not so. I believe that in this way AMD has violated my right to awareness of the characteristics of the product.

I bought Kaveri APU when it just came at a high price. I could make another choice (Intel core i3/i5 + equivalent or higher discrete graphics card), but I to meet AMD APU. Now, I ask AMD to meet me. If you do, I will know that you care about customer opinion. In this case, other things being equal, I next time again choose the solution AMD. Otherwise, the next time I'll make another choice.

GPU overclocking

Now I can not overclock at all: no matter what I did not put frequency from BIOS (e.g 900 MHz), is still a frequency of 720 MHz. Remove, please, and this restriction too.

Thanks.

Catalyst 15.11.1-beta installed on my system. OS Win8.1 64bit.

Radeon software Crimson 15.11.1 beta. OS Win 10 64bit

I am sure that this processor can provide a comfortable performance in these applications by turning off power savings.

Screanshots:

- Anno 2070:

anno2070.gif

- Thief:

thief.gif

(This behavior is in the driver version 15.11 Crimson. But it was not in the driver Catalyst Omega 14.12. It was 25-27 FPS in this game, but now - only 19-20 FPS)

- Lego Harry Potter 5-7 years:

lhp57.gif

(UPDATED at 15 december)

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19 Replies
ivana
Journeyman III

Re: APU Kaveri: poor performance due energy saving. Suggestion to improve driver & catalyst.

More, when I overclocking iGPU, it resets the frequency to 645 MHz. No overheating. Remove, please, and this restriction too.

Thanks.

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xeleron
Miniboss

Re: APU Kaveri: poor performance due energy saving. Suggestion to improve driver & catalyst.

Are you sure it is a TDP issue rising from the fact that the motherboard/APU cannot handle such a heavy load or is it a thermal issue,hat is the gpu/cpu intentionally fall back to lower specs in order to maintain safe operating temperatures?I ask this because your sensors seem to be faulty at best,or you live in a refrigerator.

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hardcoregames_
Big Boss

Re: APU Kaveri: poor performance due energy saving. Suggestion to improve driver & catalyst.

to play games, integrated graphics do not cut it, get a discrete video card with some real GFLOPS to it

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ivana
Journeyman III

Re: APU Kaveri: poor performance due energy saving. Suggestion to improve driver & catalyst.

Yes, now it is. But I ask AMD to make an optional program overclocking in Catalyst overdrive. Please. I believe that it will not give AMD high cost of money and time.

I bought Kaveri APU when it just came at a high price. I could make another choice (Intel core i3/i5 + equivalent or higher discrete graphics card), but I to meet AMD APU. Now, I ask AMD to meet me. If you do, I will know that you care about customer opinion. In this case, other things being equal, I next time again choose the solution AMD. Otherwise, the next time I'll make another choice.

0 Likes
ivana
Journeyman III

Re: APU Kaveri: poor performance due energy saving. Suggestion to improve driver & catalyst.

My complaint to AMD.

Before I buying a product, I did not know anything about energy saving technologies. AMD has not informed about this. When I decided to buy this product, I thought that frequencies will be permanent. But it was not so. I believe that in this way AMD has violated my right to awareness of the characteristics of the product.

I ask AMD to add a software overclocking to save the maximum frequency of both components of the APU at the same time. Increase heat and power suits me.

Thanks.

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ivana
Journeyman III

Re: APU Kaveri: poor performance due energy saving. Suggestion to improve driver & catalyst.

>> More, when I overclocking iGPU, it resets the frequency to 645 MHz. No overheating. Remove, please, and this restriction too.

Thanks.

UPD. So it was in the past (old video driver). Now I can not overclock at all: no matter what I did not put frequency from BIOS (e.g 900 MHz), is still a frequency of 720 MHz.

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ivana
Journeyman III

Re: APU Kaveri: poor performance due energy saving. Complaint & suggestion to improve

Updated and supplemented first post

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hardcoregames_
Big Boss

Re: APU Kaveri: poor performance due energy saving. Complaint & suggestion to improve

The APU, unlike the AM3+ platform, cannot deliver the performance you want. This is due to the overall thermal load and that is dependent on what is running..

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ivana
Journeyman III

Re: APU Kaveri: poor performance due energy saving. Complaint & suggestion to improve

>> This is due to the overall thermal load

When you overclock the CPU, heat generation increases. When extreme overclocking heat may rise 2-fold or more. This limits the ability of the motherboard and cooling system.

In the same Kaveri I can overclock the CPU-core. In this heat increases. AMD does not forbid it to do. I do not understand why AMD prohibits simultaneously to both components at full speed because that will increase the heat?

I recently watched a Review About Godavari (Kaveri refresh). There was a CPU overclocked so much that produced about 200 watts of heat and its frequency is not reduced. But even at the nominal frequencies it drops to 3000 MHz when running graphics (no overheating). It is clear, it is - a software limitation (BIOS and / or driver). I request permission to optional and under my responsibility in Overdrive remove this restriction

>> The APU cannot deliver the performance you want.

Here I quote from the first post:

- Anno 2070. Settings: 720p, low preset. Performance: 30 FPS on land in 1 mission of the company. Monitoring captures drawdown frequency iGPU. I found a bug in the driver which can sometimes engage in this game all the performance APU. It is necessary to change the game in windowed mode instead of full screen, and then at the same graphics settings get 50 FPS! There both components operate at full speed.

anno2070.gif

(30 FPS in Anno 2070)

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