Rolling back the UEFI-BIOS Rom was the first thought, but knowing the chances of that could be slim to none. I can run OCCT for 59 minutes when Turbo Mode is disabled even though it's designed has a artificial synthetic benchmark tool. Base clock timing is off by as few Hz reporting 99.76Mhz in CPU-Z. Tweaktown reported the same "set the BCLK to 100.00, you can also set it to 100.02 to get 100.00 MHz even." Voltage readings are weird in the HD BIOS, Fans spin up differently when changing from Classic Mode to HD Mode even RPMs are changed. Andantech also reports text are clipped in the HD Mode something I have experience.
When in Classic Mode there's no information about K OC when there's plenty of room for it.
Intel IGP still left to enabled when there's a Graphics card installed in PCIx Slot 1.
The motherboard seems to run great but these thing's have me concerned.
I'll be running the following benchmarks just to see if anything happens on the count of OCCT and Prime95 been Artificial Synthetic Benchmark Tools that present unrealistic loading that your CPU will never see.
Comprehensive Benchmarks
AIDA64 v5.50
MAXON CINEBENCH R15
PC Mark 7
Storage Benchmarks
AS SSD v1.8.5636.36856
CrystalDiskMark v5.0.2
HD Tune v5.60
Graphics Benchmarks
3D Mark 11
Unigine Heaven v4.0
Valley Benchmark v1.0
Don't get wrong, I'm by no means (of dumb) and have no problem tweaking my baby, but if these things seems to be happening to more then one person, then I think it should be looked at by Gigabyte indefinitely.
Note: When Enhanced Intel SpeedStep Technology (EIST) in enabled the Central Processor Unit (CPU) will dial back to what ever percent you enter I.e 10% witch is default in Windows 7 or 50% witch would be 2.xx Ghz base on the clock speed your operating at. Disabling this feature will BLOW UP! your Central Processor Unit (CPU) because Turbo Mode is NOT dialing back the clock speed. So with this bug that's affecting not only me should be looked at ASPS.
Setting it to 100% in the power options in the control panel/cmd it won't dial back to 4.0GHz it's always operating at 4.4GHz no matter what I do besides completely disabling the feature something I hate to do or for that matter live with.
Side Note: What I did up to this event was not special, mount the Mainboard, Installed Windows 7 from a bootable Flash drive with all KB updates, along with the v1.2 drivers (No Gigabyte App Software), backed up F9 UEFI-BIOS Rom and loaded Newest F10 BIOS, Both switches were set to 1-1 BBIOS_LED was active just the way it was when I first got it (Made sure to load default Values exactly what the User's Manual Said.) Never used any Third-party software I.e Intel Extreme Tuning Utility or EVGA PrecisionX Software. Wish I could say I'm a noob but a decade sitting in fort of a machine, I kinda know what I'm doing, but please anything on the subject again would be appreciated.
He's something else F9 UEFI-BIOS Rom "This BIOS prohibits updating to earlier version BIOS" So much for rolling back the ROM.
Hardware Specs
CPU: Intel Core i7-4790K Haswell 3.5GHz (Code named Haswell Devil’s Canyon)
COOLER: Corsair H100i Close-Loop Liquid Cooler
MOBO: GIGABYTE Z97X-UD5H (v1.2) LGA 1150 (Code named Lynx Point) Z97 Chipset
RAM: Corsair Vengeance Pro 8GB
VIDEO: EVGA GeForce GTX 670
SSD: 1x Samsung 250 EVO
HDD: 3x WD Black WD2003FZEX 2TB Caviar Black
DVD: 2x Samsung SH-S223
PSU: Corsair AXi AX860i 860W 80 PLUS Platinum Certified
CASE: Cooler Master Cosmos II
LCD Screen: 2x Acer V223W
KEYBOARD: Steelseries
MOUSE: Logitech G400S
GAMEPAD: Razer Onza TE
HEADSET: Creative Fatal1ty Gaming Headset
SPEAKERS: Genius SW-G2.1 1250 2.1
OS: Microsoft Windows 7 Professional (64-bit)