Sergster1 / vcache-tray

A tray utility to control dynamic CCD preference of heterogeneous AMD 3D V-Cache CPUs like 7950x3D and 7900x3D

VCACHE-TRAY

A tray utility to control dynamic CCD preference of heterogeneous AMD 3D V-Cache CPUs like 7950x3D and 7900x3D.

Requirements

• Install latest BIOS and AMD chipset driver

• Option CPPC Dynamic Preferred Cores in BIOS SMU menu must be set to AUTO or Driver to allow OS control via AMD 3D V-Cache Performance Optimizer device

  • Otherwise this device will not work and appear in Device Manager

• Recommend to turn off Game Mode in Windows, since you are gonna use this utility to control CCD preferences and profiles manually

How to use

Run it and switch modes via tray icon.

if you need to add more or modify profiles, please edit the config.json and restart the utility.

Pass -h to check more options, --alloc_console to check debug logs.

⚠ Recommend switch the prefer CCD or setup profile firstly before starting new program, it looks like some activated threads will stick on original CCD until they are terminated.

⚠ Only tested on Windows 10 yet.

How does it work

While I was investigating 3D V-Cache driver and planning to take over control of device, but I found that AMD leaved a registry interface HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\amd3dvcache\Preferences to allow change things on the fly. It will take a while, like, up to serval minutes to take effect without restarting the 3dvcache service. That's it, this program is just a simple frontend of these registry interfaces.

Build

Build with msys2 and cmake.