So, I recently picked up LA Noire for cheap on Steam, as did my brother. We both tried it out: I get perfect framerates at max settings while he gets an authentic 40's slideshow at the lowest possible setting. Now, I assume that this is partly because LA Noire is an unoptimized console port, but he gets a spot of lag in Skyrim and Borderlands as well.
My question here is, should I continue trying to upgrade his PC one part at a time or just convince him he'll have to get a new one? I've already upgraded his video card and PSU. Specs for his PC are posted below.