Which one is technically better for long run?

What would this computers be able to run and which one are you think is the better ?

• The 1st one CPU:Intel Core i7-2600 second gen. quad core whit 3.4 Ghz clock speed turbo boost to 3.8Ghz and 8mb cache Working memory:12Gb RAM on 1333mhz DDR3 Mainboard:Asus H67 Graphics card:Nvidia GeForce GTX550ti 1Gb Power supply:400 watt The brand of the first one is a ASUS CG8350 The 2nd one CPU:Intel Core i7-2600 second gen. quad core whit 3.4 Ghz clock speed turbo boost to 3.8Ghz and 8mb cache Working memory:8Gb RAM on 1333mhz DDR3 Mainboard:Intel H67 Graphics card:Nvidia GeForce GTX560ti 1.3Gb The brand of the 2nd on is a Packard Bell IXTREME I9530GE And the 3th one is the same as the packard bell when it comes to specs only difference thas is a ACER Aspire G 3600. So please tell me which one of these desktops you think is te best and what games can they run.In my case i wone play Dead Space 1 and 2,Need for Speed: The Run-Hot Pursiut-Shift,GTA 4,L.A. Noire,Saints Row: The Third,Rage and the Assassin’s Creed series

• Answer:

  All games demand different levels of graphic capacity and hardware requirements, and what they say is needed is not always true. I think you'll be able to play all of the games you listed on any one of these machines just fine, but you seem to be over thinking things. I would even venture a guess that these machines should be able to run the games in highest quality as well.