Hi there,reverting to the F5d BIOS, after putting the PC to sleep does sound strange. But hey, it's a PC and all things are possible!If I have the right motherboard for you then, it comes with Two BIOS switches. This allows you to easily swao between the Main and Backup BIOS chips.The easiest way of syncing the BIOS chips is to totally shut down the PC, set the switches so you are going to BOOT from the Backup BIOS chip, then flash the Backup BIOS with the F5 file.Once the Backup chip has been flashed you can switch back to the Main BIOS and hopefully, not encounter this issue again.
See section 1-7 on page 12 of your manual for proper BIOS switch settings and function. This allows you to control which BIOS your system is starting from. Synchronizing BIOS. Start by booting the system from each chip individually so you are absolutely certain what BIOS rev is on the chip you are starting from. If the desired BIOS rev exists on the chip you've started the machine from...at.. Gigabyte Splash ScreenALT+F12 for Award BIOSALT+F10 for AMI BIOSYou will be prompted with a menu to flash.For reference:http://forum.giga-byte.co.uk/index.php?topic=10304.0I see you've already done a bit of flashing on your own (F5d). Keep the following in mind. BIOS flashing is inherently risky. You can brick your rig if things go south. Not trying to scare you.. and its good Gigabyte has a dual BIOS option, but be aware of the risk. Its not 100% foolproof. The fact that your F5 flash reverted to F5d might be an indication of an unsuccessful flash, or aggressive CPU or memory settings. I know you are trying to squeeze every Mhz out of your RAM Could it have been a coincidence sure, but it might have also happened because of aggressive settings and the BIOS becoming corrupt. The safety net is your back up BIOS. Choice is up to you of course. Hope this helps.