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Sidebar Diagnostics is an open source tool which displays useful system information - CPU type, load, RAM usage, GPU details, network usage, a simple view of free drive space, and date and time - in a desktop sidebar.

There's no setup required, just run the executable and the sidebar appears. In a neat professional touch, the program also asks you to confirm the sidebar has displayed correctly, helps you fix the problem if not, and offers to display its settings for further tweaking. And there are plenty of configuration options, too.

You're able to display the sidebar on the left or right side of the current or any other monitor (if you've several), to reserve space for it (maximising other applications will leave the sidebar visible), or set it "always on top".

The sidebar itself is vastly configurable, with tweaks for width, font, colours, opacity and more.

If you don't need the full set of hardware monitors then you're able to select specific items - CPU, RAM, GPU, Drives or Network - and reorder them.

Sidebar Diagnostics is easy enough to control from the mouse, or a system tray icon, but the Settings dialog also provides optional hotkeys to turn it on or off as required.

Version 3.4.5 (Changelog):

Updated to the latest version of Open Hardware Monitor with bugfix for Kaby Lake clock speed.
The "UI Scale" setting now only affects the sidebar window.
Hardware names should now update correctly after the hardware is changed.
Unfortunately, this fix reset your custom hardware names but you can rename them back.
The app should now correctly run on Windows startup for laptops running on battery power.
All isatap network interfaces should be filtered now.
Updated dependencies.

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A stylish system monitor, highly configurable and professionally presented. Recommended.