Advanced optimizations (experienced user)
Here are some optimizations by configuring your motherboard BIOS.
It will be necessary to enter the BIOS and look for the option to enable or disable as indicated in the optimizations presented below.
- Enable the XMP profile for RAM (also called by AMD: EXPO)
XMP (Extreme Memory Profile) is a technology developed to guarantee an optimal operating frequency of your RAM (the one provided by the manufacturer).
Prerequisites: A motherboard and memory stick compatible with XMP profiles.
Search in the memory settings of your BIOS for XMP or EXPO, activate it and select the profile with the best operating frequency.
If you notice an instability problem, deactivate the XMP profile.
- Enable ReBar (Resizable bar) (also called by AMD: SAM / Smart Access Memory)
ReBAR (Resizable BAR) allows the processor to access the entire video memory (VRAM) of a graphics card as a single addressable block, rather than in 256 MB blocks.
In theory, this improves memory access between the CPU and GPU.
Prerequisites: Requires a recent PC
Search in your BIOS settings for ReBar, Resizable bar, SAM or Smart Access Memory, enable it.
"Above 4G decoding" allows to allocate RAM address spaces greater than 4 GB (32 bits) for PCI-express devices.
This setting is particularly relevant for modern graphics cards, such as AMD Radeon 6000 (RDNA2) and NVIDIA RTX 3000 (Ampere) and Ryzen 5000 processors.
Improved performance in some games and applications.
Improved support for Resizable BAR / Smart Access Memory (SAM)
"PCI ASPM level" allows you to reduce the power consumption of PCI Express devices, by setting a lower power state, but this can introduce latency and potentially impact performance. (in games too)
(recommended to leave enabled for laptops)
Search your BIOS settings for PCI ASPM, disable it.
- Disable INTEL VT-x or AMD-V virtualization (also called by AMD: SVM / Secure Virtual Machine)
Feature, integrated into the processor, allowing hardware acceleration for virtualization. This can cause a slight decrease in general performance. (in games too)
If you do not use virtualization software: (VM Ware, VirtualBox, Hyper-V)
Search in your BIOS settings for Intel VT-x, AMD-V or SVM, and disable it.
- Disable HD Audio controller
If you only use your PC with audio going through the HDMI cable, and not through "Jack" cables at the back of your PC, it is not necessary to have the audio "chipset" (INTEL, REALTEK, ...) activated since the sound is managed directly by the graphics card.
Search in your BIOS settings for HD Audio Controller, disable it.
- Disable HyperThreading on Intel processors or SMT (Simultaneous Multi-Threading) on AMD
This disables the logical (virtual) cores and only uses the physical cores.
In case of exclusive gaming type usage, may have minimal performance gain, better latency, and lower power consumption.
However, you will lose a little in workload capacity on multithreading. (and the benchmark score is reduced ...)
The Choice is Yours... (only for CPUs with 6 cores minimum, 8 recommended)
Search in your BIOS processor settings for HyperThreading, HT or SMT, and disable it.
