Exploring if mixing Ram Latency affects performance.
Exploring if mixing Ram Latency affects performance.
Hello, I tried to find a similar subject but couldn't. I created one of my own. I have two 8GB RAM sticks with 2666MHz and latencies of 15/17/17/35. The ones I ordered had different latencies. I wanted to know what happens when mixing latencies—will it cause issues like instability?
Main concern is compatibility with both kits; if it fails, simply remove the older one, reset CMOS and the system should resume operation. At speeds as low as 2666MT/s, the chance is minimal but not zero. In fact, at these slower rates, the likelihood matches that of identical part numbers—consider this when planning. If it powers on, RAM performance should match the slower configuration (for example, a 2133MT/s CL15-15-15-35 with a 3200MT/s CL16-18-18-38 should run at the slower speed), though real-world factors apply. Overall, booting usually works fine, but a memory stress test can give extra confidence.
I’d like a partial refund or a kit matching the latencies you ordered—it really matters at 2666GT/s. It’s not a huge issue if you modify the hardware, but I guess you don’t usually do that.
You'd face instability only under unusual circumstances where the motherboard or BIOS suddenly enforces tighter clock speeds across all components, leaving the slower ones unable to keep up. Ideally, the board (via BIOS) should automatically select more cautious timing settings for every stick or fall back to extremely conservative JEDEC defaults—even if that means slower performance. You can inspect the RAM specifications using tools like Aida64 and then manually adjust the BIOS settings. Your point is valid: manufacturers produce large quantities of chips and categorize them by stability at higher frequencies. It's likely your new 2666 MHz RAM can comfortably run at speeds like 15/17/17/35, but the maker might have set looser timings just in case they encounter less reliable chips later.
I've heard there might be an issue with starting the system, which worries me. I'm going to return the RAM they provided and look for a replacement. If that doesn't work, I'll sell my current one and get a new 2x16. I don't want to worry about whether my system will function today. Thanks for your quick replies!
If it doesn't start, simply remove the RAM modules or reinstall the BIOS. The parts shouldn't be damaged.