Yosemite very laggy on my desktop

[SAMEH209]

Hello there,
I've successfully installed Yosemite on my PC and everything is working fine except the system is very laggy (almost unusable)
My specs are:
CPU: Intel Core2Duo E7500 2.93GHZ
GPU: AMD 5570 1GB
Ram: 4GB
M.B: Gigabyte G41-MT-S2P
What could possibly be causing the problem? Or is my system just not strong enough? Should I try El Capitan or would it naturally require more power than Yosemite?

 

[VioletDragon]

Hello there,
I've successfully installed Yosemite on my PC and everything is working fine except the system is very laggy (almost unusable)
My specs are:
CPU: Intel Core2Duo E7500 2.93GHZ
GPU: AMD 5570 1GB
Ram: 4GB
M.B: Gigabyte G41-MT-S2P
What could possibly be causing the problem? Or is my system just not strong enough? Should I try El Capitan or would it naturally require more power than Yosemite?

Sounds like you don't have QE/CI & OpenGL enabled. Post screen shot About this mac.

 

[SAMEH209]

Sounds like you don't have QE/CI & OpenGL enabled. Post screen shot About this mac.

Here, sorry for the delay.
http://imgur.com/a/YrHNH

Edit: After installing Clover and enabling InjectAti through Clover Configurator it got the exact model right! Does that mean QE/CI and OpenGL are working now?
http://imgur.com/a/Ta4nq

 

[SAMEH209]

Help?!