Is this about memory exercises or another topic? (No BIOS, no screen, plus more!)
Is this about memory exercises or another topic? (No BIOS, no screen, plus more!)
paulaloca90
11-25-2024, 06:17 AM #11The core idea revolves around how memory pathways are structured. There are two primary layouts: daisy chain and T-topology. Daisy chain offers better performance in 1DPC setups because of its longer slot spacing, but in 2DPC configurations it suffers from slower clock speeds. T-topology works the other way—equal slot lengths boost 2DPC performance, yet it struggles with 1DPC due to extra wiring that causes signal reflections and interference. In DDR3, daisy chain benefits were minimal since memory speeds were lower, so most systems used T-topology. With DDR4, the difference became more noticeable, with T-topology clocks 200-400MT/s faster for 2DPC and slower for 1DPC. DDR5 shifts the balance, making daisy chain solutions more common due to higher speeds and simpler design, resulting in a 400-1000MT/s gap depending on the BIOS and hardware specifics.
Carsland123
11-25-2024, 06:17 AM #12DDR5 performance tweaks are hot right now. With your 7950X3D/X670E and the 32GB GSkill Trident Z Neo, you're already in a solid setup. The slow RAM warmup you're experiencing is common and often tied to BIOS settings. The Memory Context Restore feature can help lock in RAM states, which might explain the quick post-boot response you're seeing. However, some users caution against relying solely on this method, as it can sometimes cause instability or conflicts. It's worth exploring other BIOS updates or firmware patches that optimize RAM behavior, but be mindful of potential risks.
There are BIOS revisions where it works, and there's BIOS revisions where it doesn't. If it's working for you, keep running it, I'd only turn it off if you occasionally have issues where the system doesn't turn back on. Slight astrick to this, M die is 2nd best on AM5, since it does most of the same timings as M die, but it tends to have the tRP and tRFC1 go lower than M die does. Granted, it's barely a difference, but it's still technically a difference. Honestly, that's rather good. Both of the AM5 boards I've used with dual rank memory took over a minute to train whenever they did.
I’d be overwhelmed if I had to go through memory training every time I boot. Honestly, many people seem to blame memory training for the longer startup times when it’s not actually the case. On my board code 15, the display shows training only after I modify the BIOS. Regular bootups and restarts are skipped. (X670E Taichi) Sadly, since not all boards have proper 7-segment screens, it’s hard to tell what’s happening. Some just assume a long boot means memory training, even when it isn’t. When my system does train, it adds roughly 20 seconds to the startup time.
Petite_Helene
11-25-2024, 06:17 AM #17What does 15 mean for RAM training? AM55 enjoys keeping things in RAM.
BrendaPanda
11-25-2024, 06:17 AM #18Yes, during the initial start-up and after modifications. If set up correctly, this shouldn<|pad|> to occur only once per boot. Just as any other system before, AM5 (why the name refers to its socket?) once had a poor reputation for being unreliable for many months and remains so for users.
