cancel
Showing results for 
Search instead for 
Did you mean: 

Processors

Highlighted
Adept I
Adept I

AMD Carrizo FX-8800P heavy throttling

EDIT:

Here are 15W FX-8800P benchmarks and very interesting discussions with lots of info

---

Hi

I've recently purchused a laptop with the AMD Carrizo FX-8800P (Envy 15Z) and I have a clear issue with it.

As soon as I run any 3D program, the CPU downclocks to 1.3GHZ and the GPU downclock to some low clocks level too. I've tried Furmark and Bioshock. What gives?

Overdrive doesn't work for this APU and Catalyst doesn't do anything.

What can I do?

Thanks

Message was edited by: Julie Jerby

Edited relevant info threads/articles for those who are interested

0 Kudos
23 Replies
Highlighted
Adept II
Adept II

Re: AMD Carrizo FX-8800P heavy throttling

Every Carrizo laptop out there available right now seems to be power-limited to 12-20W. Power-limiting APU is convenient for OEMs because it allows them to invest less into designing heat-sinking and cooling solution, as well as results in a quieter system. Now with that said, 1.3GHz you are describing is too low, it should be at least 2.1GHz, which is the base clock of FX-8800P. Peak GPU clocks of 600MHz sound about right for 12-20W configuration. Carrizo in your laptop might be thermally throttling. Chances are BIOS update in the future will enable more aggressive fan cooling profile to reduce throttling. Best thing you can do for now is wait. I am personally waiting to get a Carrizo system for myself later this year.

Highlighted
Adept I
Adept I

Re: AMD Carrizo FX-8800P heavy throttling

1. So, they are limiting the TDP just in order to make it easier for them!

The performance is way way lower than it should be. Maybe I wasn't clear - the GPU is only *sometimes* set on 600MHZ and usually around 350-400MHZ. It's so stupid, as I guess even with 2.1GHZ for the CPU and full GPU power, you could match the GT 840M/940M or come very close.

2. I'm talking about the new HP Envy 15Z

3. Again, the performance was simply murdered. You don't really get a Carrizo APU.

Highlighted
Adept II
Adept II

Re: AMD Carrizo FX-8800P heavy throttling

AMD is at the mercy of OEMs. By giving them a configurable TDP and pin-compatibility with Carrizo-L (repackaged Beema with TDP of 12-25W and a single memory channel), they kind of gave way for this to happen. The current crop of Carrizo laptops is a waste of Carrizo silicon. In my opinion 14-inch+ form factors would have been better served with 25W+ TDP limit.

Try looking at the clocks while your laptop is plugged into power outlet and then compare them with clocks when your laptop is battery-powered, see if there are any discernible differences. Also pay attention to audible fan speeds while you are at it. Also try to read out temperatures using some tools like HWMONITOR | Softwares | CPUID from creators of CPU-Z. Try a few different monitoring software tools because the system might just be too new to read out temperatures correctly. 1.3GHz CPU and 350-400MHz GPU clocks are not right even under 12-15W TDP limit. It might be designed to be this bad on purpose by exploiting flexibility of Carrizo, as I am sure most OEMs wouldn't want to get on Intel's bad side by releasing something excellent based on AMD's Carrizo. AMD should consider sponsoring a couple of laptop designs themselves, perhaps a 15.6-inch and 13.3-inch model, that demonstrate what Carrizo can offer. It might be a while before we see some decent designs from OEMs. I would be really surprised if HP does not put Carrizo into their AMD-based EliteBook line by early next year's time - then something really wrong is going on.

0 Kudos
Highlighted
Adept I
Adept I

Re: AMD Carrizo FX-8800P heavy throttling

do you think it might be related to the fact I've upgraded to Windows 10?

About clocks - the same more or less.

0 Kudos
Highlighted
Adept II
Adept II

Re: AMD Carrizo FX-8800P heavy throttling

More like it's related to the BIOS. Keep checking for new BIOS versions from HP.

You can check your Power Options in Windows 10: Control Panel -> All Control Panel Items -> Power Options. Check what power plans are available. Try changing between them and retesting. Also try looking at advanced settings for each power plan by clicking on "Change plan settings" and "Change advanced power settings", specifically "Processor power management" section: "Minimum processor state", "Maximum processor state" (should be 100% for Maximum processor state) and "System cooling policy" (setting Active might make a difference). If nothing there makes a difference or already optimal then it's the design/BIOS.

0 Kudos
Highlighted
Adept I
Adept I

Re: AMD Carrizo FX-8800P heavy throttling

I'm doing some chat sessions with HP now. They say that they got reports about systems with Windows 10 from many people

I might go and try windows 8.1 with some other drive and see if at least the clocks are good - I'll report back and tell you what happened!

Thanks!

0 Kudos
Highlighted
Adept II
Adept II

Re: AMD Carrizo FX-8800P heavy throttling

Check out this review from Notebookcheck:

Carrizo in Review: How does AMD's A10-8700P Perform? - NotebookCheck.net Reviews

Specifically scroll down to sections where Dota 2 and Diablo III are tested and look at the graphs of CPU and GPU clocks:

CPU + GPU clocks Dota 2: http://www.notebookcheck.net/fileadmin/Notebooks/Sonstiges/Prozessoren/Carrizo/dota2.png

CPU + GPU clocks Diablo III: http://www.notebookcheck.net/fileadmin/Notebooks/Sonstiges/Prozessoren/Carrizo/d3.png

The same things you are describing are observed on HP Pavillion 17-g054ng laptop with A10-8700P.

0 Kudos
Highlighted
Adept I
Adept I

Re: AMD Carrizo FX-8800P heavy throttling

0. I've tried Windows 8.1 now (back from Windows 10). Same results with fully updated Windows 8.1

1. Yea, saw that one. You are lucky to get half the gaming performance..

We could get some consolation in the fact that the GPU performance is probably limited by the DDR3 memory bandwidth.

Carrizo at full 35W seem to be a nice CPU, esepcially for the price point (I got the 15Z for $450 more or less, with the 8800P), but it also seem that it requires much software optimization (like utilizing HSA) and ofcourse, the TDP thing

2. BTW, it doesn't throttle when running Prime95 and it keeps it on 2.6GHZ

3. It is not clear to me what their power consumption mean.. is it 40W for the CPU only? (did they really measured it?) or do they have some software?

I'm usually using HWInfo, but it seems that it doesn't read the sensors in the Envy 15z/AMD System

0 Kudos
Highlighted
Adept II
Adept II

Re: AMD Carrizo FX-8800P heavy throttling

Your 2.6GHz for Prime95 is in line with Notebookcheck results. You have a better binned part (FX-8800P vs Notebookcheck's A10-8700P).

Prime95 is a CPU-only workload so the most of 15W is allocated just to CPU and CPU is able keep the clocks higher. For mixed workloads CPU is going to throttle to give way to GPU.

I am not sure how they measured the power but it's got to be for the whole laptop topping out at 41W for Prime95. I would guess on laptop's DC input because it's easy to to do so. Such test reflects on the power efficiency of the whole system, including DC-DC power supply, screen, and other components... AMD-based systems usually serve as sinkholes for remaining stock of phased out parts for OEMs (crappy TN screen panels, 10/100 Ethernet, and who knows what else).

0 Kudos