Should i upgrade to a GTX 970 with this gaming pc? Currently have a gt 640 4GB

[Pizzapalle007]

So i've been thinking about upgrading my PC and buying something along the lines of a GTX 970 and a new PSU, since my current one doesn't own a 6 pin. I'd like to hear what would suite my budget. I'm not a 100% sure that my motherboard supports the needs but i'd like to know if it does. This build is purely focused on gaming.

My budget is at around $640 but i'd like to keep some money for a few other things to improve my gaming experince. Maybe about $200 - $300 depending on a few scenarios.

Here's my PC Specs:

Operating System
Windows 10 Home 64-bit
CPU
Intel Core i5 3350P @ 3.10GHz
Ivy Bridge 22nm Technology
RAM
8,00GB Single-Channel DDR3
Motherboard
MSI B75MA-P33 (MS-7808) (SOCKET 0)
Graphics
4095MB NVIDIA GeForce GT 640 (MSI)
Storage
111GB KINGSTON SV300S37A120G (SSD)
465GB Seagate ST500DM002-1BD142 (SATA)

 

[Dex does Computers]

Gtx 970 should be king of 1080 for a couple of years.