Help with R9 270X and 4590 please!

[jayden948]

Hi i just built the following gaming computer, everthing is running fine except im getting low fps and screen stuttering when watch 1080p videos and playing LoL. Installed all drivers correctly, would there be anything obvious i've messed up? thank you for any replys

Sapphire Radeon R9 270X 2GB GDDR5 OC DUAL-X WITH BOOST (11217-01-25G)
Haswell Core i5 4590 3.30Ghz 6MB LGA1150 (BX80646I54590)
Gigabyte GA-H97M-D3H Intel H97 mATX Haswell Socket 1150
Corsair Vengeance Low Profile 8GB (2X4GB) DDR3 1600MHz CL11 CML8GX3M2B1600C11
Antec True Power Classic 550W 80Plus Gold
OCZ Arc100 Series 120GB 2.5" 7mm SATA3.0 19nm
LG 24x INTERNAL Black Color SATA DVD WRITER
Western Digital Caviar Blue WD10EZEX 64MB 1TB 3.5 inch

 

[RCFProd]

Can you try uninstalling your graphics drivers with DDU:
http://www.guru3d.com/files-details/display-driver-uninstaller-download.html

And then install the latest ones from AMD's website?