Will this work?

[tbwhitaker]

I have a HP h8 1214 desktop computer and I want to replace the motherboard with GIGABYTE GA-B85M-DS3H-A LGA 1150 Intel B85 HDMI SATA 6Gb/s USB 3.0 Micro ATX Intel Motherboard and Intel Core i7-4790 Haswell Quad-Core 3.6 GHz LGA 1150 84W BX80646I74790 Desktop Processor Intel HD Graphics 4600. Will I run into any problems?

 

[Proofy]

Yea why not. You have 300W power supply tho. You might want to buy a new psu also

Altho 300w will still work because your current cpu has TDP 95W and i7 TDP 84W

 

[little_me]

your windows is OEM and will not be validated anymore since it is tied to the old motherboard.
Be prepared to buy a new license or new windows.
Depending on PSU in use, you might need to change that too, especially if it doesn't have the 4+4 pin CPU power connector.

 

[Rogue Leader]

Things you will need:

1. New copy of Windows (OEM copies invaliadte against new hardware)
2. New RAM to work with the new motherboard
3. New power supply (it doesn't have the juice or connections needed for the new board/processor - specifically the 4+4 pin processor power connector)

 

[tbwhitaker]

Oh I forgot to tell you. The power supply was replaced already to a 625W and I have 16 GB of RAM already. So all I will need is a new copy of Windows? Thanks for everything gang!

 

[Rogue Leader]

Oh I forgot to tell you. The power supply was replaced already to a 625W and I have 16 GB of RAM already. So all I will need is a new copy of Windows? Thanks for everything gang!

Ok then other than Windows you should be fine. Now that said the RAM you have may be incompatible with the new board, so just beware of that. You may still need to replace it.