My windows doesn't recognize my memory !!

[Some12die4]

I've just assembled a new computer , with Windows vista ultimate 32 bit , and i have 6GB DDR3 RAM.
The problem is that windows doesn't recognize the whole memory i have , only 2GB ? while in the computer start up i see the whole 6GB
how can i fix it ? do i have to changemy OS to Vista 64 bit ??

My computer config. is
Intel Core i7 920 2.66GHz
EVGA 132-BL-E758-A1 X58 3-Way SLI Core i7 Motherboard
6 GB OCZ OCZ3G1600LV6GK DDR3 PC3-12800 1600 MHz
1 of: eVGA 01G-P3-1284-AR e-GeForce GTX280
CORSAIR 1000w HX Series 12v ATX SLI Ready 80 Plus

 

[halosinner666]

Yes, you will have to change your OS to 64 bit. 32 bit can only recognize certain amounts of ram. It can only use the 1st channel on your board efficiently for ram as well. the only way you can get your board to recognize that ram, is to switch to 64 bit. Hope this helps.

 

[Devastator_uk]

Yes 64bit is needed.