I'm putting together a high-end 4K Ultrawide setup featuring an AMD Ryzen 9800X3D, an Astral 5090 GPU, and a Gigabyte X870 Aorus Stealth motherboard. Due to the current RAM shortages, I ended up getting a 48GB (2x24GB) Corsair Dominator Titanium kit rated at 7000MT/s with C36 timings. I've heard that the Zen 5 memory controller tends to struggle with maintaining a 1:1 ratio once you exceed 6400MT/s. If I use this kit at its rated 7000MT/s XMP settings, could it force my system into a 1:2 mode, negatively impacting my 1% lows due to increased latency?
For those with experience using X3D chips:
1. Should I downclock this 7000 kit to 6400MT/s and tighten the timings to get a better 1:1 ratio?
2. Has anyone successfully achieved a 1:1 ratio at 7000MT/s on an X870 board, or is it just a matter of luck?
3. Does having the 3D V-Cache make pushing for 1:1 memory speeds less important at 4K, or should I still aim for that synchronization for better frame-time consistency?
I want to ensure the best performance for 4K gaming without losing out due to memory dividers. Thanks for your insights!
1 Answer
It sounds like you might be pushing it with 7000MT/s. If you're running into stability issues, I’d recommend trying 6000MT/s or maybe 6400MT/s if your CPU can handle setting the UCLK to 3200MHz. Most systems seem to be happier around those speeds, and you'll likely avoid those latency penalties.
What timings do you suggest for that 6000MT/s? My kit runs CL36 at 7000MT/s.