I recently upgrade my video card to r7 260x, I uninstall my old gpu driver and installed the latest driver for my current card. My problem is im having poor performance, low fps and few stuttering,
i try to compare my performance to some youtube gameplay of r7 260x and my fps is like 10-30fps lower..
Ex. of games:
AC 4
Settings: @1024x768 (Square Monitor) all high (except godrays), all on (except v-sync), AA FXAA, Ambient Occ. SSAO
FPS: 30-50fps, but drops to 24-28 in some places (in market and places with lots of people)

Youtube FPS Test:
https://www.youtube.com/watch?v=RPg01yCOZvU&list=UUs5-k...
this is what i should be getting take not his resolution is 1080p

Prototype 2
Settings: Maxed Out @1024x768
FPS: 28-50fps, bot mostly 30-40fps

Youtube FPS Test:
https://www.youtube.com/watch?v=O-xfQARjpDM
My card is slightly better than this card, but still my performance is worse compare to him

Nba 2k15
Settings: AAx4, AAqualityx0, V-sync: On Texture: High, Player: High, Crowd: Low,
Special Effects: off, Shader: Low
Camera Angle: Drive, Zoom-1, Height-10
FPS: 45-60fps, when inbounding ball i get 50-55fps, fps often drops to 45-50fps when someone dunks


My Specs:

AMD Phenom II x4 955 Black Edition @3.2ghz (default clock speed)
Sapphire r7 260x 2gb gddr5 1x DVI Version
4gb ddr3 1333mhz
Asrock 960 gc-gs fx
PSU: Thermaltake TR2-500w http://www.thermaltake.com/products-model.aspx?id=c_000...
My monitors resolution is 4:3 @1024x768 (square monitor)