The hotfix was the problem, after installing it, SQL started utilizing the 5GB for the buffer cache.  I am aware that my paging file is set a bit low... I'm...

This is probably my problem!!!  The hotfix explains exactly my problem!  Thanks...

I've read of various negative side effects of having the /3GB switch, such as unexpected errors caused when the OS needed to access above the 1GB mark. I can't afford...

Yes, I've made sure that the domain account launching SQL Server has locked pages into memory enabled...

I have 8GB total, with currently 3GB free, which was the same amount free when I initially configured 4GB max server memory. I'm looking at the Total Server Memory counter...