- Aug 17, 2014
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Dear All,
I'm turning to you for help.
My brand new out of the box AMD A10 7850K is throttling when the iGPU is under load during gameplay. The CPU frequency drops from 3.7 GHz to around 3.0 GHz, causing low frame rates thus unplayable games.
(I did not buy this APU for massive playing, only occasional gaming. I'm actually playing with SpaceEngine which isn't as demanding towards hardware as BF4 for example.)
It throttles technically immediately after the iGPU gets the load. For example when I minimize the game window, CPU freq. goes back to 3.7 GHz and when I maximize it, the freq. is down at 3.0 GHz in the same second. (Happens also when stressed with AIDA64.)
I figured from other threads that the problem is throttling due to heat/TDP limit reach. I don't really understand why this is happening when I get the following reading from AMD Overdrive (under full load by AIDA64): thermal margin: 45*C/113*F (gets stabile after 15 minutes of stressing - plenty of room here).
Power use of the whole APU does not exceed 50W under full load according to AIDA64 (TDP is 95W of this APU as far as I'm aware).
The whole system is put in a Thermaltake case that has more venting holes than solid material. I'm also using a Zalman Optima CNPS10X for the APU and three 12 cm vents for cross ventilation of the case. The VRM modules, the RAM and the NB also get a direct flow of ambient air (25*C/77*F).
Temp readings under full load (stabile after 15 minutes stressed for 1 hour):
- APU: 42*C/108*F
- system: 32*C/90*F
Settings:
I turned off every limiting factor in BIOS I could find, such as AMD power management, cTDP, AMD Cool&Quiet, Turbo Boost, etc.
Tried many combinations of CPU/iGPU/RAM/NB speed that were stable (without voltage tweaks).
Set Windows7 power options to "performance" (detailed CPU settings are not available where other threads descibe it, I can only configure cooling profile).
My hardware setup:
AMD A10 7850K (no OC, I'm using it @ 3.7 GHz and 1.3125V)
Gigabyte G1.Sniper A88X (BIOS version F8)
Kingston HyperX Beast 2400 MHz running @ 2133 MHz
Samsung SSD
Corsair 500W PSU
The final question:
What shall I do to prevent throttling and get the performance from this APU I bought it for?
(Please excuse me if something is not clearly expressed; I'm not a native English speaker. If further explanation is needed please do not hesitate to ask.)
Waiting for your kind response,
Gabor
I'm turning to you for help.
My brand new out of the box AMD A10 7850K is throttling when the iGPU is under load during gameplay. The CPU frequency drops from 3.7 GHz to around 3.0 GHz, causing low frame rates thus unplayable games.
(I did not buy this APU for massive playing, only occasional gaming. I'm actually playing with SpaceEngine which isn't as demanding towards hardware as BF4 for example.)
It throttles technically immediately after the iGPU gets the load. For example when I minimize the game window, CPU freq. goes back to 3.7 GHz and when I maximize it, the freq. is down at 3.0 GHz in the same second. (Happens also when stressed with AIDA64.)
I figured from other threads that the problem is throttling due to heat/TDP limit reach. I don't really understand why this is happening when I get the following reading from AMD Overdrive (under full load by AIDA64): thermal margin: 45*C/113*F (gets stabile after 15 minutes of stressing - plenty of room here).
Power use of the whole APU does not exceed 50W under full load according to AIDA64 (TDP is 95W of this APU as far as I'm aware).
The whole system is put in a Thermaltake case that has more venting holes than solid material. I'm also using a Zalman Optima CNPS10X for the APU and three 12 cm vents for cross ventilation of the case. The VRM modules, the RAM and the NB also get a direct flow of ambient air (25*C/77*F).
Temp readings under full load (stabile after 15 minutes stressed for 1 hour):
- APU: 42*C/108*F
- system: 32*C/90*F
Settings:
I turned off every limiting factor in BIOS I could find, such as AMD power management, cTDP, AMD Cool&Quiet, Turbo Boost, etc.
Tried many combinations of CPU/iGPU/RAM/NB speed that were stable (without voltage tweaks).
Set Windows7 power options to "performance" (detailed CPU settings are not available where other threads descibe it, I can only configure cooling profile).
My hardware setup:
AMD A10 7850K (no OC, I'm using it @ 3.7 GHz and 1.3125V)
Gigabyte G1.Sniper A88X (BIOS version F8)
Kingston HyperX Beast 2400 MHz running @ 2133 MHz
Samsung SSD
Corsair 500W PSU
The final question:
What shall I do to prevent throttling and get the performance from this APU I bought it for?
(Please excuse me if something is not clearly expressed; I'm not a native English speaker. If further explanation is needed please do not hesitate to ask.)
Waiting for your kind response,
Gabor
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