Decision about memory setup for DDR4 modules Number of dimms affects performance
Decision about memory setup for DDR4 modules Number of dimms affects performance
I'm wondering if switching to dual-channel memory would provide a performance increase compared to using four 32GB sticks at full speed, even though the total capacity remains the same. Also, how do the number of memory slots affect game performance?
It relies on the arrangement of the DIMMs. Most 3200MHz CL16 units are single-rank today, meaning 4x8GB would function as dual-rank performance, which is about a 400MHz boost thanks to timing and rank interleaving. That said, opting for two 2x8GB sets can be uncertain because mismatched memory might cause compatibility problems, even if both kits are identical. Stick with two 16GB units instead, as dual-rank configurations are more reliable, particularly on motherboards that handle them smoothly—though at 3200MHz this advantage is minimal.
I own a Patriot Viper 4 Blackout Series kit with 16GB DDR4 3200MHz CL16, gigabyte b550 gaming X v2 and a Ryzen 5 5600 4.6GHz. I'm curious about adding more RAM to reach 32GB for a 4x8 CPU with 8-core NUMA architecture. Would that really improve performance? The specs are clear, but I'm unsure how dual or single channel settings would affect it.
The improvement is about 5 to 10 percent. If you don’t require 32GB of RAM, the upgrade isn’t worth it—it’d be almost unnoticeable, though it does occur.
I just found out my memory works in dual rank, not single rank—way better than the old setup. I’m curious though, will there be games that require upgrading to 32Gb or is 16Gb enough for RTX 3070 and casual gaming at 4K with 60fps? I don’t really need more FPS if my screen can’t show them and I don’t have a high-refresh monitor right now.
It's likely to come around eventually, probably not in the next couple of years. By then, you might find a used kit with Samsung B die-based memory—around 2x16GB at 3600MT/s CL14—for a lower price from someone who switched to DDR5. I’d wait until you really need it; right now isn’t the best time.