Sun Microsystems has upgraded its UltraSPARC family after a year and a half with the release of the IV+ model. The new 1.5 GHz processor is fabbed at 90-nanometer and integrates 2 MB of L2 cache. There is also an off-chip 32 MB L3 cache. The UltraSPARC IV+ will be initially featured in four to 24-way Fire servers running Solaris 10 with prices starting at USD 30.995.