4000 MHz CL18 compared to 3600 MHz CL16 in an 8x2 configuration with 16GB storage
4000 MHz CL18 compared to 3600 MHz CL16 in an 8x2 configuration with 16GB storage
Hello, I have a Ryzen 5 5600X processor, an MSI B550 TOMAHAWK graphics card, and RAM as the last component. I’m considering two GPU options: a 4000 mHz CL18 and a 3600 mHz CL16. Both seem similar in price, but which one fits better with my setup? The first option is priced at 4000 mHz CL18, while the second is 3600 mHz CL16. I’d like to know which performs well and why based on compatibility and performance.
In theory a 4000 Mhz CL18 should perform marginally better. However, the Ryzen 5600x might encounter issues at speeds above 3800 Mhz (or you’d need to adjust Infinity Fabric so it doesn’t sync perfectly with memory). I’d likely stick with 3600 Mhz, reduce factory overclocking, and probably gain more from the low-profile memory modules during cooler installation.
Both options seem outdated because of the pricing—4000 cl18 is probably from Hynix DJR or Micron Rev E, and 3600 cl16 is likely a budget model. 3600 cl16 is essentially similar to 3200 cl16 or 3600 cl18 if you're looking at lower-end builds. These are mostly basic options with limited features. 4000 cl18 is better than the older stuff but still not top-tier.
In reality, both are less useful now. You’ll find much better performance from other brands like Ballistix (2666 Crucial/Micron Bare PCB) or even a 3200 cl14 chip for RAM. RAM speed isn’t that critical unless you’re pushing high frequencies. Manual tuning won’t make much difference and is time-consuming.
For speeds around 3800 MHz, the difference between these builds is minimal. Stick with the cheapest 3200 cl16/3600 cl18 options—brand doesn’t matter much. You can get a few extra frames if you focus on frequency and timing, but it won’t change much in practice. In short, just grab a decent RAM and a budget CPU; tuning won’t help much.
Consider the 3600 CL16 options without getting caught up in bidding games or wasting time trying to boost RAM speeds to 3600 MHz. These parts are not worth the cost—unless you're serious about pushing your memory to its limits. If you prefer a straightforward purchase, opt for standard 3600 MHz sticks and skip the fuss. Many users focus on overclocking and peak performance tips, but most don’t actually need that level of detail. Just buy what works, and don’t let hype distract you.
You're focusing on gaming performance in 2K and 4K resolutions. Since you're new to overclocking or hardware upgrades, the 3600 MHz CL16 chip at a similar price to the 4000 MHz CL18 is a solid option. Your choice seems reasonable!
The 4000 Mhz sticks can be adjusted to operate at lower frequencies, though a built-in preset for 3600 Mhz isn’t available by default. You might need to manually configure timings, frequency, and voltage to achieve 3600 Mhz. The gap between 3600 and 4000 Mhz is unlikely to be perceptible in games—most players won’t notice any performance impact. Choose Corsair sticks; they should function properly.
Changing the frequency from 4000 MHz to 3600 MHz should keep the CL value around 18. This helps maintain low latency.
I chose to compare C5 and C7 because my X58 is down and I sold the CPU. The timing stayed consistent, using 1333 (7-9-9-10 trfc 132) to check if latency matters. Tested with WPrime 32M and SPI 1M, C5 to C7 showed about 40% difference, which seems similar to C15 to C21. The result was a letdown—I thought my faster RAM would help but it didn’t. C7 was roughly 100ms slower, and there was a 25.4s glitch on WPrime for C7. For the future, avoid getting priced wrong with 3600 16-18-18/16-19-19; performance gains won’t be huge while paying a lot more. RAM isn’t that crucial, stick with 3200 CL16 or 3600 CL18.
Changing the frequency from 4000 Mhz to 3600 could allow you to tweak lower timing values too. 16 seems likely, though other settings might need adjustment. The G-skill page suggests 18-22-22-42 at 4000 MT/s; at 3600 Mhz, you might see 16-20-20-36 (roughly). It could be even better, but Gskill probably keeps timings conservative to ensure compatibility across different motherboards. Tighter settings can make it harder for the board to work with memory.