Low Fps problem

[three_eyes]

I'm getting low fps with games like Arma II (Steam), GTA IV, and Dirt 3. A few days before I could play those games with 45-60 fps, after I changed my a monitor to see how the 1080p looked, I put my old monitor back an hour after checking, I then used an air duster to take out the dust that had build up in the computer (everything unplugged and off of course) and after that I then proceeded to play DayZ, which then I found out my fps was really low and laggy. I tried GTA IV, and Dirt 3 after finding out the fps was low and they were also had low fps. I've been looking through old threads with somewhat similar problems but still haven't found a solution why it is low. Help me please.
Specs:
Intel(R) Core(TM) i3-2100 CPU @ 3.10GHz
AMD Radeon 6850
Ram 4GB
Windows 7 Home (64-bit)
Desktop Resolution: 1600x900

 

[Sunius]

Did you by any chance connect the monitor to your motherboard instead of HD 6850?

 

[thenerdstation]

Did you by any chance connect the monitor to your motherboard instead of HD 6850?

Most motherboards wont allow you to connect a monitor to the integrated graphics when there is a graphics card in a PCI-e slot. Have you tried overclocking the CPU and GPU a hair more. A lot of games now a days demand a lot from their CPU and GPU , especially at higher resolutions.

 

[Sunius]

Most motherboards wont allow you to connect a monitor to the integrated graphics when there is a graphics card in a PCI-e slot.

Actually, most newer motherboards do allow that.

 

[thenerdstation]

Well, I wish mine did. lol

 

[three_eyes]

Did you by any chance connect the monitor to your motherboard instead of HD 6850?

Nope, I have the cable connected into the Graphics card.