Depending on the game, High to Ultra at 1080p.
Slap a good cooler and mild OC on that CPU and you should be good. You'll need a better motherboard though...HMmmmm...in fact...I would check and make sure that motherboard in your OP supports the 8320 and has at least 6+1 VRM with 8+2 preferred for an 8 core.
For $30 more, you could get this board instead:PCPartPicker part list
/ Price breakdown by merchantMotherboard: Gigabyte GA-970A-UD3P ATX AM3+ Motherboard
($77.98 @ Newegg) Total:
$77.98Prices include shipping, taxes, and discounts when availableGenerated by PCPartPicker 2014-06-13 20:19 EDT-0400
That will be MUCH better for an 8320.