4200 CL16 2x16 Gb on Micron E die

[Mungri]

With 1.5375v DRAM, 1.25v CPU, and 1.15v VCCIO.

This seems to have only been possible after burning the sticks in for a while at my previous 4133 CL16. Initially I couldn't get 4200 stable at much looser secondary timings too.

4266 17-24-24-42-700 1.55v still errors before 10 loops, and 4300 freezes before 5 loops. CL18 also doesnt allow for any more stability.

5.1 Ghz on my 10900K isn't 24/7 stable, I already tried up to 1.3v using a corsair H115i in a mini ITX build and I cant push any more in terms of temps and I'm guessing I would need much better cooling and lower temps to get any higher stable.

Micron do sell 2x16 kits binned up to 4400 1.35v, but these cost more than double what I paid for mine and I've never seen them in stock. Again I bought mine before they started binning any higher than 3200, so I dont think it would be possible to achieve the same results without at least a 3600 Mhz CL16 kit, as the best that this kit does at 1.35v is 3600 16-18-18 also. It also takes 1.4v for 3600 CL14, or 1.425v for 4133 CL17.

The chipset and CPU also matter a lot, on Z390 this same kit could only do 4000 Mhz CL18 1.48v. The 4266 hard limit I'm getting could be due to my IMC, hence its rarely worth paying much more for higher pre binned kits.