EVGA also offers their Precision program, the newest being Precision16 (as far as I know) and it offers a lot of tools to OC, adjust power and adjust cooling. However like I mentioned earlier, the processor needs to be able to hand off data to the card as quickly as possible. In my case I'm unable to do any overclocking because I get an immediate crash.
Maybe this is why
EVGA GTX 760 4GB Superclocked
The card may already be OC by the manufacturer. I have no real knowledge of this card and the link that I have for comparisons is probably as old as my card and doesn't include it. I am sure that Nvidia or EVGA sites do have that info handy if I run across it I will post the link.
If I am reading you correctly, you are simply stating that an out dated CPU could also be a bottleneck and recommendations in that area would also be helpful. Your comparison made that point, but as the OP seemed to think, his computer plays AH2 great but is junk for Alpha.
Since Cashew hasn't posted his computer specs here, I sure hope he has someone working with him, because I am not buying into the sky is falling. Cashew, Bustr left a link on how to do a dxdiag and you can attach it here by clicking on the + (attachments and other options) at the bottom the text box when you are replying or making a new post.
The dxdiag is just as simple to do.
Go to "run" (usually find this from right clicking on the windows icon or startup) scroll down until you see the word run and click on it
A text box will appear. Simply type [ dxdiag ] brackets not included, and hit enter
Let the dxdiag do its thing and then click save all information, it will prompt you where you want to save it (save it to desktop for easy retrieval)
Then post here with a reply or in a new post by, doing as I said above click + Attachments, then browse, and select the file you saved on your desktop for example and click save or okay. When you see the name and location of the file in the box under Attachments, then just post.