Hello.
Your problem could be that you run 4 dual rank sticks, which makes big stress to R7 2700’s weak memory controller and needs to lower ram clock. I have 2 from this kit, and after some time 3200 mhz clock leaded to BSOD so I tried a lot of timings, and found stable to enable XMP, put manuly ram volts 1.35 but also putting manually ram clock 3000.
When I’ll be back home I’ll check whether I had modified those tRC value or not. Rock stable now, finally, but, again, these are 2 dual rank sticks, yours is 4.
Upd: nope, i put only xmp, 3000 clock, 1.35v voltage, AND DON’T FORGET to increase SOC voltage to 1.15v, mine mb tho is Gigabyte B450 Aorus Elite and I could only put an offset for SOC +0.3 mV.