64GB DDR5 RAM offers high-speed data transfer capabilities.
64GB DDR5 RAM offers high-speed data transfer capabilities.
I’m thinking about upgrading my old 8700K to either 13900K or a 7950X/7950X3D. Right now I have 32GB RAM, which works fine most of the time, though I sometimes wish for more. I’m planning to keep it for several years without major changes. My idea is that if I ever want 64GB, I should buy a 2x32GB package right away, since 4-slot setups might cause performance issues. I’ve seen a lot of 2x16GB kits with good speeds and reasonable prices, like the Intel F5-6800J3445G16GX2-TZ5RK (6800MT/s CL34) or the AMD F5-6000J3038F16GX2-TZ5NR (6000MT/s CL30). The situation is much worse with 2x32GB options. The best kits I’ve found are the Kingston Fury Beast (6000MT/s CL36 for Intel) and Corsair Dominator Platinum (5600MT/s CL40 for AMD). How much slower would I be with those? My guess is around a 10% drop in theoretical speed or latency, but in real life it should be almost nonexistent (see that Guru3D article). For the Ryzen lineup, especially with non-3D chips, the impact is much bigger—some tests show up to 15% loss. (Note: the memory tested there runs even slower at 5200MT/s CL40.) Should I really expect that fine-tuning can bring most of it back? The Corsair Dominator Platinum appears to be built around SK Hynix chips. Before the latest fixes for overvoltage, there was also a 64GB version of the 6000MT/s CL30 memory in the QVL, but it was quietly removed (probably because of its 1.4V voltage). Thanks for the help!
Looking for quicker kits G.Skill Trident Z5 RGB 64 GB (2 x 32 GB) DDR5-6400 CL32 Memory (F5-6400J3239G32GX2-TZ5RK) - PCPartPicker Corsair Vengeance 64 GB (2 x 32 GB) DDR5-6600 CL32 Memory (CMK64GX5M2B6600C32) - PCPartPicker that's correct. Ryzen 7000 models prefer speeds above 6000mt/s (though latency isn't the main concern) and Intel gains from faster RAM. You might test 4x16 on Intel with quicker RAM; if it fails, consider giving it back. That's my take.
Thanks! It seems these kits aren't listed on the QVLs I'm using, like with my Strix B650E-E reference board. Do you think these QVLs really impact things now? I thought memory compatibility would mainly depend on the CPU, especially since the IMC is now on the die rather than the board. I've noticed faster kits available on some top-tier boards, such as the Crosshair X670E Extreme.
I wouldn't recommend these kits for AM5 because they might not function properly or could be unstable at those speeds. For AM5, the 6000 CL30 kit from Vengeance is a solid choice—Corsair Vengeance 64 GB (2 x 32 GB) DDR5-6200 CL32 RAM (CMK64GX5M2B6200C32) works well at 6200. If it doesn't fit, just switch to the 6000 CL32 version and you'll be fine.
You're referring to a kit that isn't listed in the supported RAM options for your motherboard. That's understandable—focusing on those lists helps ensure compatibility. You're right to think about adjusting it slightly, as it might still work at a faster speed than the listed maximum.
There might be challenges with XMP on AM5 boards, but overall JEDEC standards handle it well. Most recommend EXPO kits because many boards behave unpredictably with XMP (either not activating or causing instability), which usually gets fixed by manually adjusting settings instead of using XMP. For AM5, 6200 is typically the fastest reliable option with minimal effort, while 6400 works on most chips after slight adjustments. 1.4V SOC is now considered unsafe, so aim for 6200 and 1.3V if the chip supports it. The QVL isn’t a complete guide—most DDR5 kits should work without extensive changes.
There are around 6000 cl40 kits (64GB) available, though finding them might be challenging. Appreciate the info! For me, the optimal choice would be a reasonably quick kit at a fair price, setting VSOC to 1.25-1.30V safely, and adjusting XMP/EXPO settings manually. If that doesn’t work, lowering the memory frequency to 6000MT/s should still provide acceptable performance.
Essentially, if you invest time tuning 6200, consider adjusting the FCLK too. This often improves performance across many workloads, particularly at 6200MT/s—though it offers limited benefit beyond that in 2033. Aim to lower the SOC voltage during stress tests; it tends to cause crashes quickly in Linpack when too low. Once crashes appear, raise the FCLK until memory stress tests fail (like Linpack). If you're fortunate, it might reach 2200; otherwise, it could cap around 2067 (my 7800X3D version hit 2167).