Explain DDR5 differences between single rank and dual rank configurations.
Explain DDR5 differences between single rank and dual rank configurations.
hey fellas, was looking at DDR5 kits and I am not sure if this is single rank or dual rank. I know in some applications and scenarios, there is some small (but often meaningless) difference between single rank and dual rank DDR4 - and that when running 4x single rank DIMMS the system often will behave as if the dual channel memory is dual rank. Can anyone tell me if this behavior still exists on DDR5? Specifically, this kit, is this DDR5 single or dual rank? Does it matter for DDR5? https://www.amazon.com/gp/product/B09Y1FMSWS Additionally, other than the RGB (which is priceless!) is this kit worth the extra? https://www.amazon.com/gp/product/B09QS2K59B For more information, thinking of combining 13600KF + Gigabyte Z690 Aorus Elite AX DDR5. The $50 difference perhaps worthwhile to jump to i7-13700KF instead and keep 6000mt/s
Currently DDR5 offers straightforward options for kits—single or dual rank. An 8GB module is essentially 1Rx16, which resembles half-rank and should be avoided unless necessary. A 16GB module fits single rank, while a 32GB module supports dual rank. Future releases may shift this, but presently each DDR5 IC operates at 16Gb. It behaves similarly to early DDR4 with interleaved ranks. Dual rank provides a minor speed boost, but the steep drop in maximum frequency makes single rank preferable for most applications. If you need performance matching dual-rank speeds (like 6000MT/s), dual rank offers only a slight gain, unless extra capacity is essential. So technically it's possible but barely practical.
Thanks for the input. Your primary title is Final Fantasy 14, even though it doesn’t fully reflect real gameplay. GN reviewed these chips in the built-in benchmark. The 13600K with 6000 CL30 (likely similar to 6400 CL32) achieves about 43% better performance than your 10900K with 3090ti—though my existing 3080 is usually faster, CPU issues often outpace GPU ones. Concerning the Zen4 3D part, in this test the 5800X3D only gains around 15% over the non3D version; it seems the 7800X3D might offer similar improvements, making performance essentially unchanged for this game. There’s still some overclocking potential on the 13600K, especially since most of the difference comes from clock speed. Overall, any changes would hinge on whether FF14 is memory-heavy, which I suspect it isn’t. My instinct leans toward the faster memory from DDR5, as CPU bottlenecks are common. I’d probably stick with my dual-rank 4x8 4000/CL18 setup. You could consider: 13600KF/Z690/32GB 6000/CL32 or 13700KF/Z690/32GB 6000/CL32, reusing your existing DDR4—though adding more RAM might be necessary. If you keep the 4x8 4000/CL18, you’d likely need a lower-end 16GB DDR4 kit for the 10900K. What do you think?
I would receive 1 3600K/DDR4 on Z690 with your current 4000CL18 RAM. You don’t need the additional cores from the 13700K, since the 13600K seems like the best balance of price and performance for gaming. If you already have solid DDR4, there’s little benefit in upgrading to expensive DDR5 for only a minor speed increase (just a few percent).
DDR5 speeds are minimal impact, making 6400MT/s consistently quicker. Only marginally better—around 6%—in extreme memory-limited scenarios, which would improve performance. To assess memory sensitivity, compare how far the 5800X3D exceeds the 5800X. Thanks to 3D VCache, bottlenecks are rare, so significant gains suggest memory constraints were an issue. Thus, FF14 isn’t the most memory-heavy title, but it does require attention there. A high-end build would help, though. I’d likely opt for a 5600MT/s CL40 kit and push it to 6400MT/s or more (each 5600MT/s board can hit 6200MT/s on capable hardware, and 7000MT/s is achievable if lucky). However, that’s probably not everyone’s goal. Most people just enable XMP and accept it. For the Z690 Aorus Elite, a 6000MT/s kit offers better compatibility, though the board has historically hit 6000MT/s limits, especially with LN2 cooling. The extra $50 for 6400MT/s is minor compared to the overall cost.
I'm not tied to that board, but it's around $199. It was one of the few Z690 DDR5 models with flashback in that price range. I wanted the Asus TUF Z690 for its compatibility with my 3080, though it doesn't appear to support flashback.
Fair point. If you have the budget, opting for a Z790 board would give you access to 2nd gen DDR5 memory designs. However, if you're targeting speeds of 6400MT/s or less, it should work just fine either way. For a typical board choice, I'd recommend the Z690-A Pro—it falls within a similar price range (around $180), supports BIOS flashback, and offers improved DDR5 support compared to Gigabyte on Z690.
You're referring to an application with limited bandwidth, currently at around 6% capacity but expecting gains closer to 2%. Focus on RAM speed and latency rather than higher memory tiers. Investing in a 5600 MHz RAM should suffice for now, and you can upgrade to 6600+ later when needed.