What speed the CPU is running at when in C0 is unimportant because it is hardly spending anytime at this speed. A fast idle speed allows this CPU to process all of the Windows background tasks while only needing to spend 0.3% of the time in the C0 state. When trying to reduce power consumption, concentrate on how much time the core is spending in C7 and ignore the speed of the rest of the CPU. In this state, the core is disconnected from the internal clock and it is disconnected from the voltage rail so it is spending the majority of time sitting idle at 0 MHz and 0 volts. When an Intel CPU is idle, cores automatically enter the low power C7 state. Guess what? There is no difference at all. You would think that there would be a huge difference in power consumption and heat. Run a 1 Thread TS Bench test with ThrottleStop set up properly and see what multiplier it reports while the CPU is loaded. This CPU should use a 26 multiplier when 2 cores are active. If you are using Set Multiplier, set that to 29T for maximum CPU speed. The 4300U supports a maximum multiplier of 29 when 1 core is active. If you are going to use the Windows Balanced power plan then do not check Set Multiplier. When you are using the Windows Balanced power plan, you have created a situation where Windows is writing one value to the CPU control register and you have ThrottleStop writing a different value to the same register.
You will also need to switch to the Windows High Performance power plan. If you want Set Multiplier to work correctly, go into the FIVR window and set the Non Turbo Ratio to 0. This is very common with 4th Gen mobile CPUs, especially the low power U series. You might be 100% stable when you reduce the voltage by -85 mV at full load or at full speed but this can cause instability when your CPU is lightly loaded or idle or if the CPU is allowed to go down to its minimum speed.
When you use the Offset Voltage feature, it will lower the voltage along the entire voltage curve. An undervolt is only stable if it is stable at any CPU speed or at any load light load or full load.Ī 4th Gen U is already a low power CPU. Make sure the FIVR monitoring table shows +0.0000 in the Offset column. Set the voltages back to their default values and then try toggling the Disable Turbo feature. My computer does not crash when I check or clear that box. If checking the Disable Turbo box causes a BSOD then your undervolt is not stable.
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