all of my videos , showings "something" is nothing compared to this. even if managed to achieve pretty good and stable input responsiveness , the desync overtime soon or later hits me again. but this time its very different and altrough if that dont fix desync for you (which i doubt this time) , the performance boost is one of best single settings u can find in bios , well atleast in z790. im using 48gb kit - 7200-36-44-44-116 with trefi boosted to 65k. so the thing is, since ddr2 there is a thing called data masking. it was introduced as an efficiency feature to save bandwidth and power when cpu only writes a part of cache line, instead of blasting the whole burst. with dm on, memory can skip writing unnecessary bits, which is very efficient for workloads with many small updates. the tradeoff is that it needs read-modify-write cycles in the background. the ram doing partial writes instead of full writes is the problem i think. in battlefield 6 i went from 160-190 to 210-280 fps, super smooth even at lower fps. also there are more options like lowering clock cycles to make ram do write bursts faster. i will post later. if i understand this correctly, normally when cpu writes only part of a cache line with data masking on, memory does a thing called rmw (read-modify-write). it first reads the whole block, changes the bits, then writes it back. this adds random delay and makes timing inconsistent. that means the pc, after it receives data into ram, modifies them while reading and writes them again at the same time as new data are coming in. the opposite of this is full write mode, which is just one way flow. when you disable data masking, rmw is not used. every write is always a full burst. yeah it wastes some bandwidth, but the pipeline is cleaner and the game feels way more stable, no sluggish slowdown. also this fits my timeline with the problem. unlike most of you, for me it didn’t appear suddenly like one day it was great and next day it was bad. it started when i changed parts and went from ddr400 to ddr2. there was no partial writing on ddr400, only full bursts!!Setup Question = DM Enable
Help String = Configure the DM Enable for DRAM MRS MR5 OP[5].
Token =792 // Do NOT change this line
Offset =695
Width =01
BIOS Default =[FF]Auto
Options =[FF]Auto // Move "*" to the desired Option
*[00]Disabled
[01]Enabled
fullscreen pics: https://screenshot.cz/AJ/AJB2S/20250815232040_1.jpg , https://screenshot.cz/PJ/PJGST/20250815232331_1.jpg
fps (demo afected) before this setting applied https://www.youtube.com/watch?v=S0g1uY8CAx0
. Has anyone tested this yet?
, looked through several z690 boards and its there, looks like its asrock specific and if its present on different motherboard brands , mb under different name but chances are low atm.