A:Answer It is with a caveat. I own the R15 with the 4090 configuration and it came originally with 32gb of ddr5 4800 mhz ram. If you want to upgrade to 64gb you can, but if you don't get the RAM from Dell, regardless of the speed you get (say 5200 or 5600mhz) the system is set to keep it at 4800mhz. So if you're going to purchase this rig with the idea of upgrade, remember that little tidbit. I ended up purchasing 64gb of kingston fury ram, which I thought would be compatible at the 5600 mhz I purchase, but it still only runs at 4800.
