You can either search for a particular product in the top bar or browse product categories using the sidebar.
When results arrive, it's easy to see whether a particular device or package is compatible. You may want to toggle the 32-bit/64-bit version control near the top right, depending on your system.
If you aren't sure about the name or model number of a particular piece of hardware, just start up your Control Panel, select "Hardware & Sound," then select "Device Manager." This should bring up an exhaustive list of hardware attached to your computer.
That's it! You can also download the Consumer Preview of Windows 8 from the same site if you're so inclined.
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