New graphics card troubles, help!

Oligabe617

Reputable
Jun 13, 2015
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4,510
I recently got a new graphics card (Nvidia GeForce GTX 660) and I noticed that it hasn't improved my frame rate playing games at all compared with my Nvidia GeForce GT 640. I have 8GBs of RAM
and an Intel i5 core?
Can someone please speculate what the problem is?
Also, when playing games, I'll have good frame rate when staying still (45, but when moving around, I'll have like 5-10 fps??

I have a 500W power supply, and the most current drivers.

I have : 8GBs of RAM
An Intel i5 processor
The Gigabyte Nvidia GeForce GTX 660
And Asus B75M-A motherboard.
500W LPJ9-23 Power supply.

Recently I tried to play GTA V, and on the same normal settings as my GT 640, (45 fps) I was getting 6fps!!! PLEASE HELP!!!🙁
 
I have a 500W power supply, and it should only require 450w. I installed the drivers on a disk when I bought the card. I have updated the question with ful specs, please help, its getting really annoying!