I purchased this following RAM https://www.amazon.com/gp/product/B06XRBS4Y5 This RAM Is CL16 and I remember someone mentioning that the stock RAM is CL19. So is this discrepancy what causes the speed to go down to 2400MHz? In that RAM someone has commented this Is this something possible on iMac? Or my only option is to return this RAM and buy a CL19 RAM? Lower the latency should be better right?