If anyone is interested, I updated the GA-EP45T-USB3P rev 1.0 F2 BIOS with the latest Intel OROM 12.5.0.1815. and I'm testing it with RST 12.5.0.1066. After one day of testing, boots and sleeps fine. C1E and EIST was enabled in the BIOS but was inactive in windows till I physically performed a CLEAR BIOS on the MB, loaded the optimal defaults in the BIOS, and changed VCORE in the MIT from AUTO to NORMAL. CPU temperatures dropped from 49C to 33C with the core voltage idling at 1.1V vs the 1.34V
ICH10R southbridge - v12.5.0.1815
8111D ethernet - rtegrom253.lom
SATA2 chip - jmb362_C_1.07.28
AHCI-pchahci_1.20E
Gigabyte SLIC
Station drivers has firmware updates for the NEC/RENESAS USB3 Controller uPD720200 (3028 and 3034). Original is 3021. If anyone updated the USB3 firmware, please let me know how that worked out
ICH10R southbridge - v12.5.0.1815
8111D ethernet - rtegrom253.lom
SATA2 chip - jmb362_C_1.07.28
AHCI-pchahci_1.20E
Gigabyte SLIC
Station drivers has firmware updates for the NEC/RENESAS USB3 Controller uPD720200 (3028 and 3034). Original is 3021. If anyone updated the USB3 firmware, please let me know how that worked out