SUN FIRE X4140 Certifications Product Versions Level Red Hat Enterprise Linux (x86_64) 5.x Certified [1] Red Hat Enterprise Linux 4.5 - 4.x Certified [2] Additional Notes What are the minimum update releases of RHEL 4 and 5 required to support Sun Microsystems / Oracle America computers equipped with AMD 6-core processors codenamed "Istanbul"? What are the minimum update releases of RHEL 4 and 5 required to support Sun Microsystems / Oracle America computers equipped with AMD 6-core processors codenamed "Istanbul"? Vendor: Sun Microsystems, Inc.