Update: I have tried to overclock it and set it up to 400 MHz(CPU Host Clock Control), set SPD Memory Multiplier to 2.00, which is 800 MHz, because if I leave it on auto, it sets it to over 900 MHz, set performance enhance to standard, locked up PCI-E freq on 100 MHz and auto for voltage optimize, and then it shut down automatically after saving the settings, and then turned back on, and when I went to BIOS, it reverted itself automatically back >> PCI-E frequency to auto, disabled host clock control and so on, it's obvious that it doesn't support 400 MHz overclock, so I guess I might leave it the way it is as stability is a lot more important to me than getting a few fps. Because, as you said, you need to heavily overclock an Core i5 2500K CPU in order to get playable speeds, so overclocking it a little might give me some fps, but it isn't that important to me if stability is not guaranteed and besides, who cares about a few fps if it is that plain slow? So, might as well leave it the way it is. If I can't get better hardware, there is nothing I could do. Perhaps I will play it without audio, because without audio it gives me an extra 4-5 fps, so it is fine for me, I got used to it(of course, multi player is sucking bad and I have to be really, really patient, but I hope it won't have many multi player matches on attitude era mode so I can play it well, because that is what matters to me, plus I got used to it with frame skipping, without frame skipping I cannot play it, it's simply not playable, it sucks).
So, if anyone can guide me to overclock it to be stable and get a decent fps increase, I might try it, if you don't know then I will leave it the way it is and try to play with audio turned off or give up on it........
One more thing that I would like to tell you, is that I discovered that the game works best with OpenGL backend, Direct3D 11 it the slowest and Direct3D 9 is the same as OpenGL in speed but it is lagging sometimes, plus, it has many glitches, as it says, on the performance guide, Direct3D 9 may be the fastest, but it is less accurate but can have major glitches with some games and speed can drop much sometimes and it sucks. So, I have found out that OpenGL backend to be as fast or even better than Direct3D 9. Direct3D 11 is good also, no glitches, but it is slower than OpenGL, so, I don't use it.
So, if anyone can guide me to overclock it to be stable and get a decent fps increase, I might try it, if you don't know then I will leave it the way it is and try to play with audio turned off or give up on it........
One more thing that I would like to tell you, is that I discovered that the game works best with OpenGL backend, Direct3D 11 it the slowest and Direct3D 9 is the same as OpenGL in speed but it is lagging sometimes, plus, it has many glitches, as it says, on the performance guide, Direct3D 9 may be the fastest, but it is less accurate but can have major glitches with some games and speed can drop much sometimes and it sucks. So, I have found out that OpenGL backend to be as fast or even better than Direct3D 9. Direct3D 11 is good also, no glitches, but it is slower than OpenGL, so, I don't use it.