Dual core I3 4150 is fine. 99.95 PERCENT OK and .05 bottle neck?  If you worry about the cpu holding back the GPU get a 4790T which is a 45w cpu. ZOTAC 130 is under $200 [URL] Full size fan versions are $199 and up [URL] Be very wary of ebay unless its buy it now with guest account and credit card.
I have an Optiplex 3020 MT   i3 4150 CPU;   and I want to get a graphics card to upgrade it's graphics ability,  what are some of the good cards that will work on my PC?
What Graphics Card will work on an Optiplex 3020MT i3 4150 Desktop PC?