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  1. #1
    ROG Member Array
    Join Date
    Mar 2014

    CPU/GPU Bottleneck Confusion

    I used two different bottleneck calculators to compare the Intel Core i7-6700K with the NVIDIA GeForce RTX 2060, and both calculators indicate that the CPU is too weak for the GPU.

    Bottleneck Calculator 1

    Bottleneck Calculator 2

    "Intel Core i7-6700K (Clock speed at 100%) with NVIDIA GeForce RTX 2060 (Clock speed at 100%) x1 will produce 12.08% of bottleneck."

    But the clock speeds are as follows:

    Intel Core i7-6700K
    Clock: 4.0 GHz (4000 MHz)
    Turboclock: 4.2 GHz (4200 MHz)

    NVIDIA GeForce RTX 2060
    Core Clock: 1365 MHz
    Boost Clock: 1830 MHz
    Effective Mem. Clock: 14000 MHz

    The core clock speed for the CPU is higher than the GPU, so why are the bottleneck calculators indicating that the CPU will bottleneck the GPU?

    Exactly what specifications do I need to compare between a CPU and a GPU to avoid bottlenecking?

  2. #2
    ROG Member Array
    Join Date
    Mar 2014

    Reply from ASUS support.

    Please be informed that we have received the escalation feedback from the ASUS Global Technical Support Department regarding your case. According to them, unfortunately, this is not something we can answer. There are too many variables, down to the specific game/operation being performed.

    There are websites dedicated to testing this, please check them out for assistance as we cannot provide these answers, sorry.

  3. #3
    ROG Guru: Orange Belt Array Super Gnome PC Specs
    Super Gnome PC Specs
    MotherboardROG Rampage VI Extreme Omega / ROG Crosshair VIII Formula
    ProcessorIntel® Core™ i9-9980XE / AMD 3950x
    Memory (part number)Corsair LPX Vengeance DDR4 2666MHz 128 GB / Corsair Vengeance LPX 32GB DDR4-3200 32GB DDR4 3200MH
    Graphics Card #1Asus 2080 Turbo / Asus 2080 ti Turbo
    Graphics Card #2Asus 2080 Turbo / Asus 2080 ti Turbo
    MonitorJAPANNEXT JN-VT500UHD 4K 50-inch LCD
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    Storage #2Samsung 970 Pro 1 TB / ADATA XPG SX5500 Pro 3D NAND NVMe Gen3x4 PCIe M.2
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    Accessory #2 Gigabyte GC-A 2WAY NVLINK RGB (3-slot) / ROG NVLINK Bridge 3-Slot A

    Join Date
    Mar 2019

    Some applications are definitely more CPU intensive and vice versa. Also, you might also look at a CPU bottleneck as merely more headroom for you GPU--for example 12.08% more headroom for your GPU. I wouldn't worry about it, myself. A bottleneck will only come into play at max capacity or if you really want to push your hardware. In a lot of cases, can you not also make in game/application adjustments, such as via in game settings? In my case, I look at the temperatures of both my CPUs and GPUs and make adjustments to keep them down (for example by limiting the FPS). If you can't do that, or are not interested, and are hitting max temperatures, in this case, with your CPU, it will simply throttle so as to not suffer any damage. You might also look at getting a beefier CPU cooler if your CPU temperatures are getting really high.
    Last edited by Super Gnome; 06-22-2020 at 10:04 PM.

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