Is a 2GB DDR2 8MHZ better than 3GB DDR2 400MHZ each for every stick.I was wondering if i should install at lease 2GB of RAM with about 800MHZ to get more performance cause my 3GB or not cutting it for me.
It really depends on the OS and applications you run which of the two options would offer the greater performance. Regardless, the first thing you'll need to be certain of is if the memory is configured correctly within the BIOS.
In-game "lag" or "stuttering" when there's a lot going on usually has a lot more to do with your graphics card or CPU than it does the amount or speed of your RAM.
I tend to think that 2GB running at twice the speed of 3GB would be the better of the two options, especially when not multi-tasking. (Though, one can easily argue that Windows is a multi-task all by itself.)
No that's not your problem.RAM speed makes a difference in performance but its not as much as the difference that the capacity makes.(So for example.if you go from 2GB DDR 400 to 2GB DDR2 800,you'll barely see any difference in games, but if you go from 2GB to 4GB(With same speed),you'll notice a difference in games/apps)
Just remember that Windows won't see/use/make accessable all 4GB due to the limitations of 32-bit operating systems. It will likely report somewhere between 3GB and 3.5GB, depending upon the capacity of the video card's memory.
The 7100 is about as basic a video processor as you can find. And I mean basic. While it could probably run Warfighter 2, it would likely have to be run at low resolution with low detail levels.
You can buy video cards that kick the living crap out of on-board 7100 chips for as little as $40-60, such as the HD 4650. There are even a few 9600GSO (48 SP models) still available around that price. A few dollars more can get you into a 4670 or 5550. Just about anything would be better than an on-board 7100 chip.