I recently upgraded my CPU from an R5 3600 to an R7 5700x, and I kept everything else the same, including my 16GB DDR4 RAM set with the same XMP profile. After running Memtest, I noticed a huge jump in memory speed from 19.5 GB/s to 42.8 GB/s! I'm not complaining at all, but I'm really curious about why this happened and what advantages I might see with my new setup, especially regarding gaming performance.
5 Answers
I upgraded my CPU too and had to reset the BIOS after. I had my RAM set incorrectly, which really impacted my speeds. Make sure you're set to gear 1 (1:1).
What tool did you use to benchmark memory speed? Some benchmarks have had bugs that lead to inflated results under certain conditions.
The RAM bandwidth relies on the channel configuration, so if you were in single-channel mode, your max isn't fully utilized. Make sure you have dual-channel set up for optimal performance!
It sounds like the XMP settings might work better on the 5700, allowing for a 1:1 memory controller to frequency ratio. Your previous CPU might have been dropping it to a 1:2 ratio, affecting performance.
I’m using Crucial Ballistics Sport LT Gray RAM at 2400 MHz with a 1600 MHz XMP profile. Could that be affecting things?
Yeah, it's possible! Ryzen 3000/5000 CPUs generally max out around 1600-2000 FCLK, so if yours was running lower, that might have capped your speeds.
Your RAM speed might not have actually doubled; it could be a result of previous misconfigurations. Certain Ryzen 3000 chips can skew benchmarks, leading to misleading numbers. It’s worth checking if your settings were off before the upgrade!
I did reset the CMOS and enable XMP again, so maybe that fixed an issue it had before.
I used Memtest, but I think it might still have some quirks.