I'd say some issues, you will experience some lag and stuttering. Play it at minimum settings and make sure to close the backgrounds apps like your web browser. Need for Speed probably will run well on your rig and I'd say play it on medium-low settings, maybe try doing it on the higher settings. Now to buying it, honestly for GTA 5 you should upgrade your GPU and CPU because GTA will eat your system like... microchips, but seriously you are gonna run into problems. NFS Rivals might run well on your system but it's at the minimum low range, you should visit a site called www.systemrequirementslab.com, you have to download the detector program but don't worry it's a pretty safe program. I can't be %100 sure but all I can say is you need a really big HDD or SSD for both games, you will run into problems with GTA 5 like mad lag.