Is xeon e5- 2620 v2 good for gaming at 2k on middle and high or 1080p at max?

Solution
MERGED QUESTION
Question from super sharp : "Can my pc run games like Crysis 3 and Witcher 3 at ultra-max and get 60fps"



yes, it will run all games you mentioned, though I heard Maffia 3 has some issues :) enjoy your games!
MERGED QUESTION
Question from super sharp : "Can my pc run games like Crysis 3 and Witcher 3 at ultra-max and get 60fps"



yes, it will run all games you mentioned, though I heard Maffia 3 has some issues :) enjoy your games!
 
Solution
MERGED QUESTION
Question from super sharp : "Can my pc run games like Crysis 3 and Witcher 3 at ultra-max and get 60fps"



Sure. Well, maybe on Fallout 4. High 50's at least.
 


Low clock speeds, old architecture = low single core performance. compared to those Intel chips clocked @ 3+ GHz.

Although you have strong multi-core performance, some games do rely heavily on single-threaded performance. I've never played Mafia, but the others do well with mutliple cores.