Good Hardware to upgrade with $320

[ISP00KYI]

OK so i have about $320 just to spend on upgrading and I know its not much for what I want to do but here is my specs.

Mainboard-760GM-P23 (FX)
4gb 1333mhz RAM
CPU-AMD FX6300
GPU- MSI Radeon HD 7770 GHz Edition 1GB
Power-550W

I want to upgrade some components so that I can actually play Battlefield 4 without it running out of memory and dropping all my frames. Im fine with using my current GPU but would be nice to get a GTX 760 if possible. I was thinking about getting a Motherboard that can use 1600mhz or 1866mhz so that I wouldn't really need any faster. Also I'd like a motherboard that will last me a good long time that can if possible support 2 way SLI if not that's ok anyways any help would be great. Lastly I need something that could support Twitch streaming with good quality. I just need something that's good for gaming. Thanks

 

[ModernWarfare]

thats a very poor mobo. changing to alot better one with 8 pin cpu power.

a much faster gpu that is 30-40 fps difference in games.

faster bus speed ram.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Motherboard: Asus M5A97 R2.0 ATX AM3+ Motherboard ($89.79 @ Amazon)
Memory: G.Skill Ripjaws X Series 4GB (2 x 2GB) DDR3-1600 Memory ($45.99 @ Newegg)
Video Card: XFX Radeon R9 270 2GB Video Card ($179.99 @ NCIX US)
Total: $315.77
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-04-20 18:28 EDT-0400)

 

[ISP00KYI]

Thats pretty nice but what if I did this?

G.skill RipjawsX 8GB (4GB x 2) DDR3-1866 RAM Memory Module $84.99 Amazon
ASUS M5A97 R2.0 AM3+ AMD 970 SATA 6Gb/s USB 3.0 ATX AMD Motherboard $89.79 Amazon

and kept the 7770 until I had enough for am Asus GeForce 760 for $239.99 or an MSI R9 270?

 

[ModernWarfare]

yes that would do great .