Helped a guy tune his cxmt kit. Stock it ran 6000c36-38-38. We didnt push voltage that high, cxmt does not scale well with voltage, maybe c34 is possible with further tuning.
Main finding: several reports say that you can hardly tune subtimings with cxmt. Atleast this kit was quite tuneable except cl. Rcd 3 lower, rp 4 lower, rfc in mixed is similar to Samsung B, Hynix M24 and Micron D. At bit behind Hynix M16 and A though. Tightening wr to 48 and rtp to 12 was easy. Several Samsung and Micronkits struggle with this.
Conclusion: After tuning it is slightly behind Hynix M16/M24 due to CL, but it performs very similar on rcd, rp, wtr, scls, rdwr, wr, rtp and several others. It outperforms most Samsung and Micronkits, only Samsung B and Micron D performs similar from what I've seen. I would chose Hynix if price was similar or slightly lower. If we talk 100usd lower I would consider in for AMD 1:1.