In addition to the Consumer Preview of Windows 8, and the betas of Visual Studio 11 and the .NET 4.5 framework, Microsoft on Wednesday also released the beta of Windows Server 8.
Best of all, the minimum system requirements are: a 1.4 GHz 64-bit processor, 512MB of RAM, and 32 GB of storage.
http://www.microsoft.com/en-us/server-cloud/windows-server/v8-default.aspx
http://technet.microsoft.com/en-us/evalcenter/hh670538.aspx?ocid=&wt.mc_id=TEC_108_1_33
And more…
If you are also looking to get past logging and having your download tracked, simply follow the link below. This may work for a limited time *who knows*
http://care.dlservice.microsoft.com/download/win8svr/3/8/B/38BAA0A6-2BA7-4341-AA72-EB72CAB219E7/8250.0.WINMAIN_WIN8BETA.120217-1520_X64FRE_SERVER_EN-US-HB1_SSS_X64FRE_EN-US_DV5.ISO?lcid=1033&cprod=w8svr