Release Preview (release candidate) build of Windows 8 has finally been released by Microsoft.
The build number is 8400 and is sized at 2.5GB for 32bit and 3.3GB for 64-bit. It is available for download via ISO or web installer, much like the Consumer Preview.
System Specifications:
Processor: 1 gigahertz (GHz) or faster
RAM: 1 gigabyte (GB) (32-bit) or 2 GB (64-bit)
Hard disk space: 16 GB (32-bit) or 20 GB (64-bit)
Graphics card: Microsoft DirectX 9 graphics device with WDDM driver
Download your copy now: windows 8 release candidate