1.428V When Idle Should I Enable HPC?

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Robertwhyte

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Hi, my motherboard (Sabertooth 990FX R2.0) is very easy to overclock on and handles it very well, all i need to do is change the ratio and the board will do the rest, voltage and configuration etc. With this new overclock i noticed that the voltages were at 1.428 & 1.45! when idle, the temps are not really effected much though, 31C while idle with 1.428V vs 29C with 0.948V. So my question is, can i enable HPC mode, but still have the benefits of the overclock in high duty tasks, such as gaming? i noticed before the overclock, the clock speeds would go all the way down to 1.4GHz on idle, but would i get the full 4GHz in gaming??

Thanks.
 
Solution
mamasan2000
Enable cool'n'quiet and APM.
Disable HPC.
And read this

http://www.ronwoods.us/2014/02/what-does-amd-application-power.html

Highlights:

"Application Power Management is a technology inside your AMD FX CPU that works in conjunction with AMD Turbo Core technology that will allow your CPU to reach Turbo Core speeds"... "As long as there is thermal and voltage headroom available to do so."

" APM also ensures your not putting to much stress on your motherboards VRM and power phases which most times don't have the cooling solutions or active fans like your CPU does."


"HPC Mode is a setting in the BIOS that prevents the CPU from lowering and locking its clock rate under load in certain conditions. In some benchmarks, HPC Mode can...
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Robertwhyte

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so youre saying HPC is overvolting my cpu? I have APM enabled and cool n quiet disabled, cool nquiet was disabled before the overclock and i enabled APM after the overclock. so i should disable HPC mode?(btw i went ahead and enabled it after getting advice elsewhere, nothing has changed) alot of people on other forums say that HPC mode automatically throttles your cpu based on load i.e idle = 1.4GHz at 0.948 Volts, which is what i want, my system was doing it before the overclock, now its not.
 
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mamasan2000

mamasan2000

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Enable cool'n'quiet and APM.
Disable HPC.
And read this

http://www.ronwoods.us/2014/02/what-does-amd-application-power.html

Highlights:

"Application Power Management is a technology inside your AMD FX CPU that works in conjunction with AMD Turbo Core technology that will allow your CPU to reach Turbo Core speeds"... "As long as there is thermal and voltage headroom available to do so."

" APM also ensures your not putting to much stress on your motherboards VRM and power phases which most times don't have the cooling solutions or active fans like your CPU does."


"HPC Mode is a setting in the BIOS that prevents the CPU from lowering and locking its clock rate under load in certain conditions. In some benchmarks, HPC Mode can increase performance by about 6%, but these performance improvements are only realized in benchmarks like HPL. Dell tested this setting for the AMD Interlagos Server based CPU's and saw very little performance increase outside of HPL benchmarks. HPC Mode did however increase power consumption and power draw for very little benefit."
 
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Solution
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Robertwhyte

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May 6, 2014
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thank you sir! enabling cool n quiet did the trick, i now have a stable 4.2GHz overclock which throttles down to 1.4GHz and 0.998Volts when idle :) although i had to set the voltages to offset mode which means it wont let me manually enter my own voltage, but ill figure it out! in the mean time! i am very pleased! thanks again!
 
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