I'm willing to try with cl 14 and 2666mhz to see how it goes. I know for a fact that bandwidth is more important than latency for most use cases, for mining monero I have no idea.
Latency is the most important for RandomX, bandwidth is not the bottleneck there. That said, 3200 CL14 will be better than 2666 CL14 because same timings at higher speed = lower latency.