How to fix memory timing errors in Unreal Engine 5 demos?
Seeing those random colored streaks on materials was honestly infuriating, especially when panning the camera quickly. Digging into the logs, the default XMP profile for my G.Skill Trident Z5 DDR5 6400 was causing a 45-60ns latency jitter on my specific motherboard, which completely messed up the texture data stream to the GPU. I wasted time increasing the page file first, which did nothing but tank my FPS from 75 down to 62—a total waste of effort. I headed into the BIOS Advanced menu and manually tweaked the primary timings from 32-39-39-76 down to 30-36-36-72, while bumping the DRAM voltage from 1.35V to 1.40V. In AIDA64, my read/write latency tightened from 85-98ns to a much cleaner 72-78ns, and the textures finally stopped flickering. I actually pushed the tRCD too low at one point and crashed the system twice during high-poly renders, so I had to loosen it by 4 units to find the sweet spot. RAM temps stayed between 48-55℃ and VRMs hit 58-63℃. Six rounds of MemTest86 confirmed zero errors, and the visuals are finally butter smooth.
