It's not just the toughbook that will see 4 GB of ram. It's a 32 bit operating system limitation. I have 4 computer right now with windows 7 and 4gb of ram, gaming, multi-tasking, office. Etc. It hasn't run out of ram for that yet.
Rob or toughasnails can help you with that. Rob works for Rugged Depot and most likely has what you want in stock.
I haven't test out the factory GPS on a 31 so I can't really say on that. I do have CF-29 and CF-30 with customtoughbooks GPS unit and it works very well.
Thanks for the reply, I checked out "customtoughbooks" GPS kits & that looks like the way to go, I just need to research, and find the difference in the two different versions (SiRF Star IV vs. Ublox 6 ), and which may be better for my use, & location.
I really enjoyed fixing, moding & rebuilding my old CF-27, but upgrading to my new CF-31 mk2 is like Christmas to me, thanks again for the help.
CF-31 mk2 ToughBook, 320Gb 7200 rpm hdd, Win 8 Pro, Upgrades = 8Gb Ram, Super Multi Drive, Desktop Dock, Media bay battery, Emissive Keyboard, 128Gb SDHC.
More upgrades to follow, ie. GPS, USB 3.0 PCMCIA card & SSD.
JT-B1 ToughPad, WiFi, Android 4.0 powered, 16 Gig RAM, 32Gig SDHC