Mid 2010 Mac Pro boot camp recognizing 1.86GB RAM

I have a mid 2010 Mac Pro w/ 6GB RAM and a dedicated video card. Win7 32-bit is boot camped on it. I know 32-bit Windows can only use 3.75GB of RAM. However, this Mac Pro is only seeing 1.86GB.

Since this is Win7, no boot.ini is available for /3GB switch and editbcd /set increaseuserva 3072 did nothing, even after clearing out the variable and resetting it to 3072.

I came across a post saying UEFI/BIOS for Mac Pros cannot see more than 1.86GB RAM in a Windows 32-bit environment. Is this true? It was only the one post and I forgot where I saw it. If not, how do I resolve this issue? If not, that's fine. I can format and install Win7 64-bit if needed. I want to confirm 64-bit Win7 will recognize more than 1.86GB of RAM. Any input?

Thank you.