Which graphics card should I get? - 2

I have a HP Pavilion with a built in GeForce 9100, which can't even handle simple games like Minecraft. I want to eventually be able to run games like DayZ. I have the RAM (8gb), I just need a new graphics card, preferably under/around $150. I don't really know anything about graphics cards, so i'm asking for your help. Again I want to run games like DayZ on a semi-high graphics settings without spending too much money. Thanks!

BTW, here's a link that will give you all the specs of the PC

Any modern card will be fine… BUT the machine has an old PCIe port. Supposedly modern PCIe cards will work in an old port and it'll just be slower.

If you saved up a little more money you could buy an entire computer and even the new intel integrated graphics would run circles around your old machine.

300W power supply. Oh my! You really need to plan this one out. A r9 270 needs a 500w minimum psu so you'll need a psu as well and then your still bound by whatever amd cpu you have which isn't listed.

EVGA 500 B 80 PLUS BRONZE Certified 500W Active PFC ATX12V v2.31/EPS 12V v2.91 3 Year Warranty 100-B1-0500-KR Power Supply Intel 4th Gen CPU Ready $50 after rebate $29.

Plan this one out bud.