Hi! As far as I know this motherboard supports DDR3 1600 MHz only. I've found this while I gathered the some information before I bought a version of this notebook about a year ago. So I can't remember the source of this information. Unless there is a new revision...
I have a slightly different model with I5 6300HQ (which is by specification also capable handling of 1866 MHz DDR3 and 2133 MHz DDR4), 8 GB DDR3 1600MHz RAM, 256GB SSD, matte FHD display and it was about $800.
If I am here I just want to leave a mainly positive message about this computer.
I also had some annoying issues at the beginning, but all have been fixed after several Win10 and driver updates. (past issues where: graphic driver failures with firefox and audio driver failures after resuming from sleep) I assume those where Win10 problems rather than driver.
I am not a gamer, I use the computer for programming, circuit board development and 3D modelling beside everyday use.
-have no problem typing on the keyboard for hours (nor phantom clicks nor other issues)
-battery life up to 10 hous with programming, 8 hours with music or video, 6.5 to 7 hours with internet surfing (display backlight down to 30%, keyboard unlit, dedicated video card off, SSD only(!), WIFI off exept when surfing, TPD is down to 35W by setup)
-Dell has a preinstalled app, so battery charging can be disabled, when it has more than 50% (can be set to 50% to 100%), so extra charging cycles can be avoided, I like this feature a lot. But yeah, the charging should be displayed somehow, because the indicator LED is always on when it is not fully charged while it is connected to the main supply even it is not charging according to the custom setup. Anyway I can live with that.
-have no problem to use the touch pad at all
-the display has some bleed at the botttom, but it is visible mainly at boot time. The angle and the quality is good enough, with the matte surface no problem beeing outdoor exept having shorter battery life by using brighter backlight
-at normal use the cooling is mainly off, exept installing updates, heavy calculations, infinite loops... ooops :o, or usage of the dedicated grapics card ( it happened for some reason the calculator app has got automatically assigned to use the dedicated graphics card rather than the integrated one and started to run the fan, but it can be reassigned by the NVIDIA utilities)
I also had problem with the "Intel(R) Dynamic Platform and Thermal Framework Utility Application" which supposed to save me energy instead of running the CPU like crazy, but it's been solved by a recent Intel driver uptdate
-boot up in 20 second, app starts are really fast as well (on SSD of course)
-tempting CUDA capabilities for heavy calculations 8), anyway it's comming with the graphics card
-an empty bay for a second of course SSD drive
-oh yeah, the housing can be a bit stronger... ::) , my bad
I really like the simplicity of the design, it is not like a christmas tree full of extra LEDs, unnecessary slots weird patterns and many other artifacts.
Yes it is not perfect but after all, anyone can say anythig, I am pretty satisfied for that money...