“With their Sun Fire V40z Server, Sun is moving into new realms in three different ways. First, it’s a move onto a new hardware platform – namely the AMD Opteron CPU. Second, it’s a move into the 64-bit arena on a platform other than their familiar UltraSPARC environment. Third is the adoption of a mainstream Linux distribution as a primary operating system choice. We tested a V40z with four Opteron 848 processors, each with 2GB (total of 8GB) and two 73GB Ultra320 SCSI drives.”You can read the full article here, or you can see it on the Sun v40z reviews page