What a statement. "Just isn't enough"...lol) Where do you get your information from?
I just got GTA4 last night and it plays flawlessly on my rig. I have MORE than enough power to play that game (which is a childish game anyways, stinks so bad I gave it to my kid)
Yea...I'm overclocked, thats the benefit of the e8400.
I don't see the reason to go to quad when the software of today doesn't require it.
Heres COD Multiplayer maxed out because the game is capped at 91 fps max
http://i657.photobucket.com/albums/uu299/Demcovich/Computers/iw4mpJpg2010-01-0211-41-46-00.jpg
Heres COD MW2 Singleplayer
http://i657.photobucket.com/albums/uu299/Demcovich/Computers/iw4spJpg2010-01-0211-56-28-18.jpg
When you start to jack the settings up in GTA4, a quad definitely becomes necessary, especially if you leave the instant replay feature enabled(forgot what it is actually called since I haven't played the game in so long). However, the game is definitely playable and enjoyable on a dual-core for sure, and still looks amazing, the insane settings that GTA4 allows are...well insane. They really go beyond what is necessary. The developers pretty much just unlocked the highest settings the engine is capable of, just as a sort of "hey, look at what it can do" sort of thing. While most game developers cap the max settings far lower than what the engine is actually capable of to make sure that the highest settings are playable on mid-range rigs.
I find that dual-core owners really like to defend the dual-core processor. And they tend to use a lot of false logic to do it. Yes, the E8400 can overclock, but so can the Q9400. Now, the Q9400 tends to hit slighly lower speeds, due to the lower multipler mostly, but 3.6GHz isn't a stretch on the OP's P45 board.
Most dual-core owners like to talk about how there isn't anything currently out today that they can't max out. And while that might be true, there are already games that come very close. So what happens in a year? Is the dual-core still going to be enough to max out games? No. It is barely enough now. So why not go with a quad? If you are making an upgrade, there really is no good reason not to go with a quad, short of price, which doesn't apply here since the E8400 and Q9400 are the same price. The Q9400@3.6GHz will last a lot longer than the E8400@4.0GHz. Really, there isn't anything on the market today that can't be maxed out with even a 3.6GHz dual, which the Q9400 is and then some. The games that will need the extra power in the future, will also be games that benefit from 4+ cores...
And as for the screenshots, COD4 and MW2 aren't really CPU intense games to start out with. On top of that, the single player one is in the training part of the game, where there are no computer generated players/enemies. Once you start to add those in, the CPU usage goes up. In your screenshots, the CPU is likely going mostly idle. Multi-player has not computer controlled enemies, and neither does the training section of the singleplayer. However, games like GTA4, with hundreds of computer controlled people and computer controlled cars, and physics with detailed destructable cars tend to really eat up the CPU.