I have 3.5GB detected out of 4GB, so W7 32-Bit does detect more than 3GB.
I’m not worried about drivers. All of my hardware is new/modern with support for W7 and 64-bit. I guess what I was worried about was stability and gaming, since I’ve never used it and we don’t use it here as a company (although we support it). But looks like those claims are no longer relevant. So I’ll be getting a 64-bit builder pack soon enough.