I currently have 32GB of Corsair Vengeance DDR5-6000 in a 2x16GB kit and am considering adding another 2x16GB kit to reach 64GB. My system uses a Ryzen 7 9800X3D, an ASUS TUF X870-Plus WiFi motherboard, and a Radeon 9070 XT. I mainly need the extra memory for video editing and music production. How much do four DDR5 sticks affect stability and memory speed on AM5, and would buying a matched 2x32GB kit be the safer choice?
4 Answers
Four DDR5 sticks can work, but they put more electrical load on the memory controller than two sticks. On AM5, that often means the system may not run DDR5-6000 reliably, especially when mixing two separate kits. You may need to lower the speed, loosen timings, or adjust settings, so a matched 2x32GB kit is generally the safer and simpler upgrade.
If you do add another kit, match the exact brand, model, capacity, timings, and rated voltage rather than mixing random modules. Even two kits with identical specifications are not guaranteed to behave like one factory-tested 4-DIMM kit. Enable the memory profile, then run a proper memory test and several hours of normal workloads. If it errors, drop the speed to something like 5600 or 5200 MT/s.
For this particular AM5 build, I’d choose 2x32GB DDR5-6000 if the budget allows. It gives the CPU two memory modules to handle instead of four and leaves the other slots open. Four sticks may still work, but you should expect a greater chance of needing manual tuning or running below the advertised speed.
It isn't automatically unstable. Some people run four DDR5 modules for years without problems, including at fairly high speeds. The important distinction is that four sticks are usually less optimal, not guaranteed to fail. Your result depends on the CPU's memory controller, motherboard BIOS, the DIMMs, and whether the kit is listed on the board's memory support list.
That makes sense. I’m mostly trying to avoid having to troubleshoot random crashes while editing, so a matched 2x32GB kit may be worth the extra cost.