Originally Posted by nrpeyton
Interesting, so how would a memory controller that is failing to manage 3200 on a mobo advertised as capable of 3200, be grounds for RMA'ing your chip?
How exactly do these memory controllers work?
I know the quality of silicon can cause electrons to "stray" off path into adjacent pathways causing instability-- and its these rogue electrons that make us unstable.
(To go on even further, the cooler something is; the better it conducts, therefore electrons stay on their pathways--hence LN2 / water cooling = better overclocking).
/\ /\ But thats all to do with the CPU cores. How Does a memory controller come into that? I'm just curious as to the science behind it? Is it part of the "main silicon"? I.E. if thats the case; surely a chip with a poor memory controller would also be a poor overclocker? (I.E. less likely to hit 4.0GHZ)?
Memory controller at end of the day is still part of the silicon & we know there are variance from chip to chip. As no 2 CPUs overclock the same, neither are 2 memory controller always the same. It just about how low the does the worse one swing. Intel is at a point with their Skl/Kbl architectures that even the worst of the worst IMC will still do 3733-3866. Good ones will do 4266+.
On AMD Ryzen, seems like the worse memory controllers are bad enough that they cannot even do 3200Mhz. CPU manufactures are smart & hence they don't specify memory speeds outside of safe zone, just as they don't specify overclocks that the user will be able to achieve. I haven't checked, but I think Intel specifies upto 2400Mhz on SKl/Kbl & so does AMD (Again these numbers can be off, but neither specify more than 2666 for sure). Anything above those speeds is considered "OC", aka there are no guarantees & they CAN, if they want to, deny you RMA on a chip that you consider has a bad IMC.
I think mobo makers can get off by saying that its the chips fault (weak IMC) unless you can prove that the same CPU does 3200mhz on other mobo. Again, these are how these things are setup legally (IANAL). But if you tried to RMA your CPU or Mobo due to not being able to hit a certain mem speed, they'd probably accept your RMA because they don't want an unhappy customer. But I think they can legally say no to you if they want to.