Latency in mixed RAM configurations
Latency in mixed RAM configurations
I have two 2x8GB sticks and I’m planning to add another 8GB stick. It’s rated at 2400MHz, but it shows your system thinks it’s running at 3200MHz. I’m concerned about how this might affect latency and performance. I just want the full speed of your 3200MHz RAM.
Never experienced a RAM count that wasn't even, it must be divisible by two. Otherwise, the odd one would operate on a single channel. If you wish to add more RAM, ensure you get at least two additional units of the same speed and model as the existing ones; otherwise, the overall performance will match the slowest RAM's rate. For instance, with this setup, 8GB would run in single channel, 16GB in dual channel, but all would maintain a 2400mhz frequency. Don't forget the potential for system instability. Please let me know if you're incorrect.
Task manager shows 3200MHz, possibly dual channel at that frequency while single is 2400MHz.
It will use the slower settings by default, such as 2400. Including the extra stick will likely reduce your overall speed.
If you combine different types of RAM, the system usually chooses the slowest option. Your current configuration is DDR4-3200 with specific timings, while the new one might be DDR4-2400 with different settings. It will likely force all modules to match the lower speed, possibly affecting performance at higher XMP levels.
Talks in 1520 ddr2 with 1x3 setup, p95 large FFTs remain steady, yes just lacked funds back then to upgrade to another 1gb stick. Now I’m too lazy to invest even though I have the money. If OP needs more RAM, extra capacity offers better single-channel bandwidth than relying on the pagefile. It defaults to your XMP settings, which is fine since both are likely 8GbE and similar clock speeds. The 2400 MHz is probably D9VPP, not the high-end C9BJZ, so it should still reach around 4600 with a suitable board and IMC. But that clock speed is wasteful; max out FCLK/gear to 3800-4200 and don’t over-tighten primaries—they’re not affecting performance.