Intel Core 2 Processors supported
Intel Core 2 Duo E4500 Processor (2.20-GHz, 2-MB L2 cache, 800-MHz FSB)
Intel Core 2 Duo E4600 Processor (2.40-GHz, 2-MB L2 cache, 800-MHz FSB)
Intel Core 2 Duo E4700 Processor (2.60-GHz, 2-MB L2 cache, 800-MHz FSB)
Intel Core 2 Duo E6550 Processor (2.33-GHz, 4-MB L2 cache, 1333-MHz FSB)
Intel Core 2 Duo E6750 Processor (2.66-GHz, 4-MB L2 cache, 1333-MHz FSB)
Intel Core 2 Duo E6850 Processor (3.00-GHz, 4-MB L2 cache, 1333-MHz FSB)
Intel Core 2 Duo E7200 Processor (2.53-GHz, 3-MB L2 cache, 1066-MHz FSB)
Intel Core 2 Duo E7300 Processor (2.66-GHz, 3-MB L2 cache, 1066-MHz FSB)
Intel Core 2 Duo E8200 Processor (2.66-GHz, 6-MB L2 cache, 1333-MHz FSB)
Intel Core 2 Duo E8400 Processor (3.00-GHz, 6-MB L2 cache, 1333-MHz FSB)
Intel Core 2 Duo E8500 Processor (3.16-GHz, 6-MB L2 cache, 1333-MHz FSB)
Intel Core 2 Quad Q9300 Processor (2.50-GHz, 6-MB L2 cache, 1333-MHz FSB)
Intel Core 2 Quad Q9450 Processor (2.66-GHz, 12-MB L2 cache, 1333-MHz FSB)
Not much for Bios updates here so anything not listed above probably isn't going to work.
5.37 Rev. A 1.1 MB Mar 16, 2009 which supports the Above CPU's.