Intel i5 8400 consistently operates at 3.8 across all cores
Intel i5 8400 consistently operates at 3.8 across all cores
Hello, Your i5 8400 consistently runs at around 3.8 GHz across all cores even when no load is applied to some of them. Since you play a game that only uses one core, it would be great if your first core could reach 4 GHz with Turbo Boost. Is this achievable? How can you enable Turbo Boost for the first core? I haven’t seen it reaching 4.0 GHz before. My Windows Power Manager is set to "balanced," and most BIOS settings are auto, except for certain RAM timings (15-16-16). You’re using an i5 8400 board with H310 Pro, powered by an Nvidia 1070 Ti.
Background processes always limit single-core performance improvements. On Intel processors, single-core boost is typically the standard. Single-core boost is mostly promotional language.
In systems without non-K processors it becomes ineffective, and the remaining cores don't utilize any capacity. I've never encountered a processor running at 4 GHz before.
@EspinalAndres - Your testing has some issues. You chose the 1 Thread test in CPU-Z, but this function isn't functioning properly. It actually loads two threads instead of one. Any adjustments you make to the thread count will add an extra thread to your request. If you switch CPU-Z to 1 Thread, you'll see two threads; to 2 Threads, three; four Threads gives five, and at 6 Threads it reaches seven active threads. This test appears faulty. You should reach out to the CPU-Z developer to clarify why it behaves this way. Setting it to 1 Thread loads two threads, activating both cores. Any background Windows tasks during this session will increase active cores to three. It's unlikely you'll observe the i5-8400 reaching its full 40x multiplier in this scenario. Another concern is that CPU-Z and HWMonitor often misrepresent the maximum multiplier when a CPU isn't fully loaded. Most popular tools lack the accuracy needed. They tend to apply excessive load, preventing the CPU from utilizing its highest setting. The more monitoring applications you run, the greater the strain on your processor. This leads users to mistakenly think Intel CPUs rarely use their core multiplier at all. That's not accurate. Proper setup ensures Windows 10 runs efficiently. Background tasks in Windows will minimally impact CPU performance when using the optimal multiplier. For instance, a 4700MQ processor can reach its maximum 36x multiplier with just one core active. ThrottleStop employs high-performance monitoring timers and follows Intel's recommended approach. The built-in TS Bench - 1 Thread test actually loads only one thread, not two. It clearly demonstrates that the CPU consistently uses the full 36x multiplier for most of the time. https://i.imgur.com/osraGEQ.png A reported multiplier of 35.98 suggests the CPU operated at the 36x level about 98% of the time during the last second. If background processes are excessive, you won't achieve these figures. When a six-core processor is idle, it shouldn't spend much time in the C0 state handling background work. https://i.imgur.com/Sjo8mtn.png If your C0 percentage exceeds 0.5%, check Task Manager under Details to see what's running. This often baffles monitoring tools but doesn't mislead about CPU usage. An Intel processor maintains a consistent multiplier based on active cores, regardless of where the load is placed.
In reality, since no single main task exists, the CPU tends to stay idle at its boosted state, often using all cores on a 6-core processor. Most experiences I've seen don't reach that level because background processes are running. For gaming, options include Steam, Epic, or other titles.