HP Z400 Workstation Certifications Product Versions Level Red Hat Enterprise Linux 4.7 - 4.x Certified [1] Additional Notes How do I get audio to work on HP Z400, Z600, and Z800 workstations in Red Hat Enterprise Linux 4?Which versions of Red Hat Enterprise Linux support the Intel® Xeon® 5600 series processor (formerly codenamed "Westmere-EP")? Vendor: Hewlett-Packard Hewlett-Packard web site