How to determine the hardware (CPU and RAM) on a machine?

Question

I\'m working on a cross platform profiling suite, and would like to add information about the machine\'s CPU (architecture/clock speed/cores) and RAM(total) to the report of

Answer 1

I'm very late but here is my contribution. I tried to have a more modern C++ approach.

    #include  // NOTE this header is MSVC specific!
    #include 
    #include 

    std::string GetCpuInfo()
    {
        // 4 is essentially hardcoded due to the __cpuid function requirements.
        // NOTE: Results are limited to whatever the sizeof(int) * 4 is...
        std::array integerBuffer = {};
        constexpr size_t sizeofIntegerBuffer = sizeof(int) * integerBuffer.size();

        std::array charBuffer = {};

        // The information you wanna query __cpuid for.
        // https://docs.microsoft.com/en-us/cpp/intrinsics/cpuid-cpuidex?view=vs-2019
        constexpr std::array functionIds = {
            // Manufacturer
            //  EX: "Intel(R) Core(TM"
            0x8000'0002,
            // Model
            //  EX: ") i7-8700K CPU @"
            0x8000'0003,
            // Clockspeed
            //  EX: " 3.70GHz"
            0x8000'0004
        };

        std::string cpu;

        for (int id : functionIds)
        {
            // Get the data for the current ID.
            __cpuid(integerBuffer.data(), id);
            
            // Copy the raw data from the integer buffer into the character buffer
            std::memcpy(charBuffer.data(), integerBuffer.data(), sizeofIntegerBuffer);

            // Copy that data into a std::string
            cpu += std::string(charBuffer.data());
        }

        return cpu;
    }

Here was the result of this function for myself: "Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz"

Honestly it's really annoying something like this hasn't been standardized...