Biostar

Yes, our TA970 motherboard will be able to support ATI R7 260X VGA card.

When using 3TB hard drive on Hi-Fi A85W motherboard to install OS, press F9 key to select boot device and choose UEFI mode to install. It will help Windows system to recognize it properly.

When system boot to logo screen, press [Tab] key on the keyboard to by pass the logo, then monitor will show system information.

Or go to CMOS> Boot > Full Screen Logo Display set to disable to turn off the logo screen.

If system boot up too fast, please go to CMOS> Boot> Set Prompt Timout and set the delay time to 5.

System infomation will show 5 seconds on POST screen.

You should be able to fit in GeForce GTX 780 card on H55 HD board.
However, two PCI slots on motherboard will be blocked by VGA card's over-size cooling fan.

Here is the list for AM3+ motherboard to support two PCI-E graphic cards.

TA990FXE

TA970

TA970XE

Yes, please go to BIOS download section for update the latest BIOS and chipset driver to support Intel Ivy-Bridge E CPU.

https://www.biostar.com.tw/app/en/mb/introduction.php?S_ID=567#dl

Yes, both model will support CPU Smartfan function.

Our BIOS has a munu for setting the Smartfan or it can run automatically.

Intel H55 chipset will not be able to support 3TB hard drive with full disk space.

It's due to chipset specification limitation.

Also to support 3TB hard drive need to have UEFI BIOS.
However our H55 model uses AMI core 8 BIOS.

So it will not be able to support full 3TB disk space.

TPower X58 will not be able to support Intel Xeon CPU.

Clone view will only be able to work from single GPU. So Hi-Fi A85S3 will be able to do clone view with on-board VGA and on-board HDMI port.

With add on VGA card, it can do extension view with on-board VGA and VGA card with two GPU.