As of September 2nd 2012

Tip: Use Internet Explorer when downloading SQL Server 2012 Trial and allow the Akamai Download Manager to install, this way you will not get bad downloads and it has resume support.

Link: http://www.microsoft.com/sqlserver

SQLFULL_x64_ENU_Core.box

MD5 Checksum: 45ec814de98df7764c1a421571dac585

SHA1: b06e3ca729d3337d91396cc9a966be04ad83f223

CRC32: 43c2220e

SQLFULL_x64_ENU_Install.exe

MD5 Checksum: 95e26fbfccaaba59d7c30d7ddc73152a

SHA1: 8bab67be8017e9ba8279b726407650468c7b93f8

CRC32: c6a6c7e0

SQLFULL_x64_ENU_Lang.box

MD5 Checksum: 1f3eedbe14b8e683502604ab4d55b6dd

SHA1: b6393abeacb461cd6ef332b842c2b236cef3f988

CRC32: d3569abf