I'm looking for 128GB of DDR5 RAM for a job, and I found a Corsair 64GBx2 kit running at 6400MHz with CL42 timings, which seems to be the only moderately priced option available on short notice. I've read that there can be issues with RAM speeds over 6000MHz, and that CL42 might be too high. Alternatively, I could get a 32GBx4 configuration at around 5600MHz with either CL36 or CL30 for about 30% more. However, some other 64GBx2 kits are almost double the price. Considering my workload includes heavy real-time rendering with Unreal Engine 5, how much of a disadvantage would I have if I went with the Corsair kit?
5 Answers
I've personally had success with 6400 CL32 RAM on my system without any hiccups, but I made sure it was listed on my motherboard's QVL. Just keep in mind that if you push it too fast, it might default to slower settings, especially with AMD's architecture. It's generally better to stick with 2 DIMMs to avoid stability issues compared to 4 at high speeds. That said, the differences aren't monumental unless you're aiming for peak performance.
Most everyday tasks aren't hugely affected by a bit of latency increase, but if your work is particularly memory intensive, it might be noticeable. From what I’ve read, issues around high-speed RAM on AM5 setups can often be addressed just by activating the XMP profile and tweaking some settings to ensure everything runs smoothly. You should be okay as long as you configure it properly!
Thanks! I've got a lot to learn about these settings, but your advice is super helpful.
If you can, see if your employer can reimburse you for the RAM. It's often worth it to spend a bit more on quality memory, especially for professional work. I’ve used similar kits before, and while they can be pricy, they often pay off in performance and stability.
You're more likely to be fine than not with the Corsair kit. Many people reporting issues are often looking for those tiny performance gains. For your needs, it seems like it would work fine without major drawbacks. If you notice problems, you could also try relaxing some timings manually to improve stability. But if you're trying to save money and need RAM quickly, go for it!
Good to hear! I appreciate you putting my mind at ease about my decision!
It really depends on what you're doing. For gaming, higher speeds mostly matter, but for tasks like rendering or simulations, the differences aren't as critical. If your work involves a lot of gaming-like performance, you can get away with the Corsair kit. Just be aware of potential stability issues with such high speeds on the R7 9700X. You might find that these extreme specs are more about bragging rights than actual performance improvements.
That makes sense! My work is heavy on Unreal Engine, so I guess it might impact me a little more than usual.
I appreciate the insight! I didn't know about the QVL list; I’ll definitely check that out.