A best IT Professional always check system requirements before going to install any product in production environments, being an IT Professional I am also curious to download and install Windows 10 Technical Preview to check, test and update my knowledge towards Microsoft Platform and specially towards Windows 10.
Right now, as usual, Microsoft Windows 10 is available free to download, use and get the experience of newly launched Operating System. I have gone through after installation and it’s almost same to Windows 8.1 in Graphical Interface, only Windows Start Menu is changed or can say is in Mixed Mode with Windows 7 and Windows 8.1
As per the Microsoft Link , hardware requirements for Windows 10 Technical Preview Edition is same like Windows 8, System Requirements / Hardware Requirements.
As per Microsoft “Basically, if your PC can run Windows 8.1, you’re good to go. If you're not sure, don't worry—Windows will check your system to make sure it can install the preview”. Here are the System requirements for Windows 10 Technical Preview Edition
• Processor: 1 gigahertz (GHz) or faster
• RAM: 1 gigabyte (GB) (32-bit) or 2 GB (64-bit)
• Free hard disk space: 16 GB
• Graphics card: Microsoft DirectX 9 graphics device with WDDM driver
• A Microsoft account and Internet access
Microsoft has also include important notes on the same page and said as under in key points;
• Some PC processors and hardware configurations aren’t supported by Technical Preview.
• To access the Windows Store and to download and run apps, you need an Internet connection, a screen resolution of at least 1024 x 768, and a Microsoft account.
• After you install the preview, you won't be able to play DVDs using Windows Media Player.
• If you have Windows 8 Pro with Media Center and you install the preview, Windows Media Center will be removed.
• The preview won’t work on Windows RT 8.1 and Windows N editions.
• The preview is not available for Windows Phone.
• A small number of older, 64-bit CPUs might be blocked from installing the preview.
• If you're running Windows 7 without SP1, you can only upgrade to the preview by downloading an ISO file. If you install Windows 7 SP1, you can upgrade to the preview by using Windows Update or by downloading an ISO file.