Did you try rev.1308 bios?

BIOS Version 1308
About This Release:
 November 12, 2007
 BTX3810J.86A.1308.2007.1112.1659
 SATA RAID info:
Intel(R) RAID for SATA - v7.6.0.1011
 SATA AHCI info:
Version UPSD src 04-20-2007 for ICH9
 PXE Nahum info:
Intel(R) Boot Agent GE v1.2.50
New Fixes/Features:
 Fixed issues where some BIOS Setup options are hidden.
 Added updates to BIOS support for Intel® Desktop Control
Center.
 Fixed display of cache for multi-core processors.
Fixed PC28 memory error beeps on warm boot with 1333 CPU / 1333
Memory.
 Fixed issue where XMP settings were causing system instability.
 Fixed issue where overclocking settings were causing HW
Watchdog Timer to fire on every boot.
 Added Hardware-based Watchdog Timer implementation.
 Added support for XMP (Extreme Memory Profile).
 Added some boot/S3 resume time optimizations.
 Fixed a bug where IERR got asserted on certain CPUs.