I'm trying to upgrade my RAM and feeling a bit lost with all the info out there on DDR5. Currently, I have a 9800X3D running 64GB (4x16) at 6000 MT/s and CL30 using EXPO, but I'm facing some issues. Every time I boot, my system goes through memory training, and if it doesn't, I get crashes. I'm really hitting the upper limits of my RAM capacity, causing performance problems due to memory paging.
I've come across a lot of conflicting info online, especially since what applies to DDR4 doesn't always hold for DDR5. I've read that Intel and AMD behave differently when it comes to memory. As for ranks, I can't seem to find any solid info about how they work in DDR5. How do I figure out how many ranks my current setup has, if ranks are even a consideration anymore? Is four ranks still considered better than two? Moreover, what about speeds? I've seen comments that higher capacities might not be stable at high speeds, like 96GB kits running stable at 6200 MT/s while 128GB might only manage 4800 MT/s. But if I can buy a 2x64 kit at 6400 MT/s, how does that work? Any insights or pointers to reliable information regarding larger capacity DDR5?
4 Answers
To clarify, DDR5 sticks of 32GB and larger are generally dual rank, while those below that are single rank. For better stability, two DIMMs are preferred, especially at high speeds. Technically, dual rank (like 2x32GB) can be the fastest, but the difference in performance at DDR5 speeds is less significant than it used to be. A 2x48GB kit should get you up to 6200 CL30 easily unless you have a particularly unlucky chip. Remember, whether you can hit 6400 depends more on your CPU's integrated memory controller than the RAM itself.
With AMD, you generally want to avoid using four sticks. The memory controller isn't as robust as Intel’s, so two DIMMs will give you better stability. Dual rank is still relevant in DDR5; while it might make stability a bit trickier, it's not a major concern if you're running two sticks at optimal settings like 6000 CL30. If you go for a 128GB (2x64) kit, look for native 6000 CL32/34/36 EXPO kits from brands like G.Skill. They should work with one-click overclock as long as your BIOS is up to date.
The reason info is conflicting is that it really depends on the specific combo of motherboards and CPUs. If you go above AMD’s recommended specs, you’re entering gamble territory. I'd suggest grabbing a 2x64GB 6000 CL32-36 kit. This setup should be stable for most uses, and chasing higher speeds and lower timings might introduce unnecessary instability.
Running four sticks makes things tougher on your setup, especially for stability. If you switch to a 2x32GB configuration, you should have no issues. Keep in mind that at 6000MHz, your X3D chip relies less on RAM due to its cache. Higher speeds can cause instability due to timing misalignments, which might contribute to your current troubles.
Right, he’s only running dual channel with his 4 sticks, so a 2x configuration would be much better.
Just a heads up, quad channel isn't really a thing on current consumer boards like AM5; they’re all dual channel now.