I7 870 not working properly with 4 cores enabled?

[panaanxd]

So when i first received my computer it already had only 2 cores enabled by default. BIOS did and still only offers me only 1, 2 or ALL core options (and ALL means 2, it seems). But i managed to get all 4 cores running by unticking the number of cores in msconfig, and that seriously reduced my performance.
For example: bf3 ran at 15-25fps at ALL lowest settings with 4 cores, and with 2 cores it got a nice 40-60fps with medium settings.

Isn't 4 cores supposed to be faster than 2? I need to know whats wrong
I have 4gb ram and a gts 450

 

[monu_08]

well mostly games now only uses maximum 2 cores but they recommend quadcore processor

 

[panaanxd]

Well i brought bf3 for an example because that's the game that is supposed to benefit the most from a quad core, or so i've heard atleast.

 

[panaanxd]

I'm using windows 7 64-bit and my motherboard model is: DP55WG

Sorry for double post, but i can't edit anything

 

[mcnumpty23]

I'm using windows 7 64-bit and my motherboard model is: DP55WG

Sorry for double post, but i can't edit anything

press the quick edit button not the edit one

its the middle one at the bottom right corner of your post