Evaluating the impact of three memory sticks on performance
Evaluating the impact of three memory sticks on performance
Hello! I’m planning to purchase my third 8GB RAM stick and want to know if it will impact my system’s performance. Here are the details: CPU – Ryzen 5 5600, GPU – ASUS TUF RX 6800 XT, RAM – two 8GB Kingston Fury 3600MHz CL17 modules (working at CL18). The third stick will be identical. I’ve heard online that dual-channel support remains even with less than 16GB, so it should still work fine. Thanks!
You might encounter difficulties, even with four units being more challenging than two. But if it still functions similarly, you'll maintain dual-channel speed until you exceed the two-stick limit, after which accessing the third will switch to single-channel. This behavior can vary based on how the operating system manages memory, making it less consistent than assuming a fixed amount like 16GB. It’s best not to purchase single sticks if you plan for dual-channel use, as mismatched batches can lead to unpredictable performance. You should stick to sticks from the same batch to ensure uniform operation, which is why dual-channel solutions exist. For the lowest risk, consider swapping your existing pair. The alternatives carry a much higher chance of issues.
It seems you're comparing prices and options for a GPU. If you have the budget for a $500 GPU, then a $60 kit with 2x8GB RAM makes sense. Just hold off on the 1x8 until you can afford it.
Consider selling the two sticks you own and getting a 32 GB kit. The four dimms are experiencing performance problems because XMP isn't working; manual overclocking won't help either, so they run slower than advertised (around 3600 MHz). It should work at 3200 MHz instead.
Using three RAM sticks in single channel instead of dual reduces performance and causes instability. Adding a fourth stick after the third stops the system from using dual channel. It’s not worth it to buy separate single-channel kits, as RAM components can be finicky—sticking to a factory-matched kit ensures compatibility. Mixing different makes and models, especially DDR4, often leads to crashes and issues. It’s better to purchase a complete kit with matching specifications rather than combining modules. For 32GB, opt for a 2x16GB package at a reasonable price. High-speed kits like 3600MHz 2x16GB are available under $90.
Mainly what others mentioned. Also, if we focus only on the question about using more than 16GB, what if we go beyond it? And if we flip it, why invest in another stick when you're under 16GB? But sure, even with the same setup, you might get a product with different chips, which usually causes issues. For example, crashes can happen when XMP is enabled, forcing you to manually speed up RAM. Many people faced this problem and asked for advice here.