May 18, 2011 General Description. The EMC2305 is an SMBus compliant fan controller with up to five independently controlled PWM fan drivers. Each fan Desktop PC platforms based on the Intel X38 Express Chipset, combined with either the Intel Core 2 Duo, Intel Core 2 Quad or Intel Core 2 Extreme The Intel X58 Express Chipset. The Intel X58 Express Chipset continues to push innovation with capabilities designed to deliver quality, performance and. CPU Bus Speed Supported. 800, 1066 and 1333 MHz FSB. Chipset. Intel X38 Express North Bridge/ICH9R South Bridge. Super I/O Controller. SMSC SCH5327 . 5 Volt Operation. PC98/99 and ACPI 1.0 Compliant. Battery Back-up for Wake- Events. ISA Host Interface. ISA Plug-and-Play Compatible Register. Set.