Overclocking and ranks
Overclocking and ranks
Hey so i was thinking with ryzen cpus, whats an ideal setup for some light overclocking with ram. 4 ranks with 2x16gb or 4 ranks with 4x8gb? So you would be getting 32gb total. Now ive heard that duel rank ram can be harder to overclock compared to single but ive also heard that memory controller is strained more on ryzen cpus with all dimm slots filled, so in theory would that make 2x16gb better to use? EVEN though its using the same amount of ranks? doesnt that make it exactly the same for the memory controller? I dont understand how the channels with have an impact since in either case your running 4 ranks on both channels. This is one part of the ram overclocking im having trouble wrapping my head around. edit: i should probably mention im mostly asking about daisy chain mobos
I'm curious about the meaning behind ranks. A DIMM comes in either single rank (SR) or dual rank (DR). Are you referring to having two DR DIMMs versus four SR DIMMs?
I think I got the point a bit wrong. From what I understand, most 16GB sticks are of higher quality (dual rank), while 8GB sticks are lower tier (single rank). That’s why fewer sticks are available for the cheaper option—using two 16GB sticks gives better performance than four 8GB sticks in this situation.
I explored single and dual rank memory a year ago and noticed dual rank DIMMs usually work better on Ryzen systems than single rank ones. This suggests overclocking single rank RAM might not be as effective. I haven’t found new information yet, so it’s something you’d need to verify yourself. @Jurrunio mentioned that fewer connections are preferable, though I’m unclear about T-topology boards.
The signals reach the center of two rods, then divide into two within the memory slots ensuring each slot has the same trace length.
It seems the drop in clock speed with 4x8 layout in t-topology versus daisy chain is due to trace effects, and the reason for better performance on 2x16 daisy chains is likely related to fewer traces. That’s correct.
Yes, on certain systems there are adjustments made so effectively that T top isn't required for proper performance with two channels. It simply limits one channel at a time.