CS: GO does not play smoothly with a 1 GB graphic card?

I am unable to play CS GO smoothly, even though I have an 1 GB ATI Radeon graphic card. I have tried to play against bots to see if that makes a difference, but it still has difficulty.

My notebook cofigurations are :

Processor Intel(R) Core(TM) i3-2350M CPU @ 2.30GHz
Memory (RAM) 4.00 GB
Graphics Radeon (TM) HD 7450M
64-bit operating system
Number of processor cores 2
Network Adapter Realtek PCIe FE Family Controller
Network Adapter Broadcom 4313GN 802.11b/g/n 1x1 Wi-Fi Adapter
Network Adapter Microsoft Virtual WiFi Miniport Adapter
it dont even run smooth offline with bots !

Open the console and enter the following command to display the FPS counter in the upper corner of the screen (by the way this is absolute the first thing You should do in any multiplayer FPS game)

cl_showfps 1

Now check the FPS counter while playing. See in what situations the FPS drops.

Go to the Video Options and set EVERYTHING to low, set the resolution to 640x480, now run the game in offline mode without the bots and see is there a difference.

To play in "casually" You will need to have at least 60+ FPS constant (but the gameplay will sometimes be challenging) for smooth play You will need to have at least 120+ FPS.

If You have low FPS when set everything to low - well, then Your PC is not good for this game, sorry, but when FPS are high - try to find a balance between quality and FPS by changing the resolution and quality of the game.