RipestAvocado :
4745454b :
If you have a full SSD or a slow spinning drive that can cause what you are describing. If it's a drive you can try defragging it. It might help. Otherwise you need to find a way to load the data faster.
I have installed msi afterburner and I noticed that my gpu is never at 100% and drops in frames corespond pond with drops in percentage, does that mean the problem is psu related?
No, a PSU is not something which will cause stuttering.
Have you ever put too many things on one electrical outlet? It overloads and trips a circuit breaker. It does not only deliver a certain amount of power and no more. It gets overloaded. The circuit breaker then acts as a safety mechanism to prevent overheating of the wires and a fire. It does so by cutting all power to the circuit.
The same sort of thing happens with a PSU. A good quality PSU will detect it is overheating. It will instantly cut all power it can't limit the power. All power is cut and the computer turns off. Some even have a fuse.
A very poor quality, non-UL certified PSU has no safety mechanism. It will continue to overheat from too much current draw. This will likely result in catastrophic failure. If you are lucky just the PSU dies, if you are unlucky it takes the computer down with it, if you are really unlucky your house burns down.
Hypothetically you could put 1000w worth of components on a 300w PSU. It may even run for a few seconds before it blows out or the safety mechanism cuts all power.
If your video card never hits 100% and you see stuttering. Then look at CPU. Don't just look at full CPU usage either. Look at usage per core. If one core is peaking at 100% while gaming. The CPU is limiting the game. Multiple cores are of no help if a game is not multi-threaded or not multi-threaded well. As one core peaking can limit everything else.
There has been no mention yet as to what CPU you are using, at what clock rate and which games are giving you trouble.
Also have you looked at your video cards memory usage? 3GB is not much nowadays. If you are very near or over 3GB usage due to your settings. Performance will be crushed. It won't matter if you aren't hitting 100% GPU usage. If you go over the video cards VRAM capacity. Data cannot be fed quickly enough to the GPU to hit 100% GPU usage.