Not really, there is no need to use pure 64 bit os to take advantage of more rams, windows 7 32 bit can optimise more then 4GB ram using PAE technology (http://en.wikipedia.org/wiki/Physical_Address_Extension), PAE are somewhat the same like our 32bit processor that support 64bit code (by extention). Your motherbord/bios need to support PAE and remaping memory address. The other thing you need are the kernel patch to remove 3.xgb ram limit by microsoft, those who are like me that have 4GB ram but windows 7 32bit only see 3.2GB ram usable, can use the patch to fully utilized full 4GB ram, just make sure your motherboard bios detect the correct full 4GB or 8GB of your system ram.

Here is the patch, its been made my russian and russian language.

http://www.filestube.com/a8ac06048c61792003ea/go.html

if you cannot download from there just search in google, the file name is 4GB-7600.RTM.x86.04.08.2009.exe

When the program open, it just have one button, just click it and after a while it will prompt some black screen to remove the watermark, just press y and it will reboot your windows 7. After that you will have 2 windows boot option and you also can select the old win 7 kernel (just in case), just select the ">128 GB memory" and load your windows 7, check the information page for the ram used. To edit the boot option i recommend program name EasyBCD, you can edit some option of the windows boot manager like default boot option and auto time timer (10 second min).

After this some of you might still have a watermark of windows test mode in the right bottom desktop, means mcbuider need to be run again, open cmd in run box then type mcbuilder.exe and enter, this might take a while, after that reboot your system and the watermark will be gone.

I tested it out my self with windows 7 ultimate, and its work, I got full 4GB and even try add another 1 stick of 2gb more, so total would be 6gb of rams in windows 7 32bit.

Hope I can help you all with this.

My windows 7 32-bit with 6GB of RAMS.

I'm having a serious RAM issue. Win7 64-bit on a laptop, only 1.95 GB usable. What the f***.

that's not true bro. it is stable and fast cuz it fully utilize 4gb ram . for me no problem on my lappy . manage to play Crysis, COD4 ,DMC4 and Assasin Creed.

Hi, Im new here, I have some problem with my comp, i have install up to 3.5 GB of ram (1 GB X 3 and 512 mb X 1) and my bios system shows only 2559mB of ram, the motherboard that im using it is asua P4P800-X and im using XP-32 bit as my OS, can some one help    me with it cos i read the manual and it not give much info about it, thanks in advance

Mine's 4GB RAM but system say 3GB usable :/