Lag issues on games

[Luis Silva de Souza]

Hi, months ago i started to have some problems with my computer (i mean, fps problems). So i upgraded my system. So far, i've changed memory (corsair 2x4gb 1600mhz), supply power (a corsair 500cx) and the graphic cards (a r7 260x). But it still occurs, like when im playing GTA V on 1366x768, i get like 40fps, and some random spikes (wich makes it drop to 16).

Things i already tryed:
Reinstall the system;
Another HDD (a notebook one, wich i know it will show problems later, but i used for test purposes);
Another mainboard and another processor (altrough i kept the cooler).
Copying the game to the notebook HDD;
Updating drivers (but motherboard just has lan/audio only).

System specs:

Windows 8.1 PRO (x64);
R7 260x 1GB;
Phenom X6 1055T;
2x4Gb corsair 1600mhz;
Supply power corsair 500cx;
An notebook HDD (160gb);
An samsung HDD (500gb, the one wich i store my games into);
An asus M5A88-V/EVO

 

[T3hG33ko]

Check to see if you're running the game on your R7 graphics card.

 

[Luis Silva de Souza]

I'm, i already desactivated the onboard graphics card.

 

[T3hG33ko]

I'm, i already desactivated the onboard graphics card.

Hmm weird. You've done everything I would've suggested. Try lowering your graphics settings.

 

[Luis Silva de Souza]

I already tryed that too, didnt work. I mean, ALL THE GAMES exept by those who doesnt requires alot of the GPU/CPU are with the lowest settings, running at the 30fps.

 

[T3hG33ko]

I already tryed that too, didnt work. I mean, ALL THE GAMES exept by those who doesnt requires alot of the GPU/CPU are with the lowest settings, running at the 30fps.

Damn. Sorry I couldn't help you man.