我现在也遇到了一个问题，DDR4的qds用不带odt的模型仿真，波形有点问题，最后选用了240欧姆的odt，波形...
It took manually tuning ODT values to get my DDR4 stable @ 4000 Mhz. with my 9700k and the Asrock Taichi motherboard. I might even try pushing for 4100Mhz., which I actually got to pass memtest64, orthos and prime95 collectively for some 16+ hrs on Auto settings, but on powering ...
6.3.1.2. Dynamic On-Die Termination (ODT) in DDR4 In DDR4, in addition to the Rtt_nom and Rtt_wr values, which are applied during read and write respectively, a third option called Rtt_park is available. When Rtt_park is enabled, a selected termination value is set in the DRA...