At such low res, I would be quite surprised if your video card is limiting you, unless you are running at settings where it doesn't have enough VRAM. I was in agreement with the others, until I saw your res.
If your
total RAM is 4GB, now, consider bumping that to 8GB, too.
PCPartPicker part list /
Price breakdown by merchant /
Benchmarks
CPU: Intel Core i5-4430 3.0GHz Quad-Core Processor ($198.32 @ Amazon Canada)
Motherboard: ASRock B85 Pro4 ATX LGA1150 Motherboard ($80.00 @ Vuugo)
Memory: Kingston Value 4GB (1 x 4GB) DDR3-1333 Memory ($23.99 @ Amazon Canada)
Memory: Kingston Value 4GB (1 x 4GB) DDR3-1333 Memory ($23.99 @ Amazon Canada)
Total: $326.30
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-09-08 16:00 EDT-0400)
NOTE:
price includes $20 MIR
3rd-gen isn't much cheaper in the end, but no rebates:
PCPartPicker part list /
Price breakdown by merchant /
Benchmarks
CPU: Intel Core i5-3350P 3.1GHz Quad-Core Processor ($184.61 @ DirectCanada)
Motherboard: Gigabyte GA-B75M-D3H Micro ATX LGA1155 Motherboard ($71.99 @ NCIX)
Memory: Kingston Value 4GB (1 x 4GB) DDR3-1333 Memory ($23.99 @ Amazon Canada)
Memory: Kingston Value 4GB (1 x 4GB) DDR3-1333 Memory ($23.99 @ Amazon Canada)
Total: $304.58
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-09-08 16:04 EDT-0400)
Not quite $300, but faster than an FX. If you go with the FX series to save some money, though (an i5-4430 is only 10-20% faster, based on reviews I've seen, and a near-4GHz FX will still be a solid upgrade from what you have),
get a FX-6300 or 6350, not the 6100.
Edit: towards that end, here's what I would get for AMD:
PCPartPicker part list /
Price breakdown by merchant /
Benchmarks
CPU: AMD FX-6350 3.9GHz 6-Core Processor ($144.99 @ Memory Express)
Motherboard: Asus M5A97 LE R2.0 ATX AM3+ Motherboard ($79.99 @ Canada Computers)
Memory: Corsair XMS3 8GB (2 x 4GB) DDR3-1600 Memory ($55.99 @ Amazon Canada)
Total: $280.97
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-09-08 16:23 EDT-0400)
Under budget, and with slightly faster RAM (which matters more for AMD, anyway). Re-use your Cooler Master heatsink, but don't OC too much (it would already be a hot chip). Maybe put this one's HS on you old one, if you don't have the original. Those MSI 970 boards have a trend of VRM failure--while many might be due OCing, I still would try to avoid them, anyway.