ResistanceCore :
But my pc can handle witcher 3 got 50fps on medium setting...
The Witcher 3 has much lower requirements though. It only requires a GTX 660 and that's probably to play at 1080p . You play at a lower resolution and that's why your GPU can handle it even though it's weaker than the minimum required GPU. The recommended GPU is a GTX 770 which is much stronger than your card. OSIRIS: NEW DAWN requires a minimum of a GTX 680. Which is about equivalent to the GTX 770. Whether or not you need a new CPU I do not know. The minimum requirement is just i5. There are old Core i5's, dual core laptop Core i5's, and there are very good desktop Core i5's. Your CPU is probably just about as good as an old dual core Core i5. Though I wouldn't say...