You must have big plans tonight, to just mail in this always suspect, reheat of an article.. any time ram OC is suggested and mem clock decoupling isn't explained, i assume someone asked chatGPT to write a tech article in the voice of someone who has only used computers they can fit in their pocket.
If someone is buying a CPU, why wouldn't they purchase/config the ram to run at the cpu's max coupled speed from day one, especially as latency is already horrible at the highest speeds. Making it even worse isn't going to improve actual performance.
And if they're someone who needs substantial ram bandwidth (like I do, for instance), I just buy off-lease xeon workstations, an hp z6g4 with 2x xeon 62** processors (currently less than $1k if you know where to look) has 12 channels of ~3000 ram, with the option to tickle a TB of ram if you want to drop $400 on optane DIMMs. Heck, a z640 from 2015 with 2 v4's (5th gen processors, lmao) gives you 8 channels/16 dimms of 2400 ram, with less than half the latency of your overclocked ddr5... this is before discussing the power draw. Not to the dimms (although that's worth discussing), but to the memory controller. It's easy to go from 5-10w to 20w+ in the memory/io controller when you OC memory. If you have a laptop, or a mid-range cpu with a <=65w processor, you've just wasted almost 20% of your potential power, to gain marginal performance, and can create thermal throttling beyond that if you're bouncing off the power draw just to make the ram number go up.
If you dont believe me, go grab a zen 5 processor, and OC in stages and run benchmarks. In a LOT of benchmarks, 6400 outperforms 6800, 7200, 7600, and 8000 head to head, and thats using ram capable of easily hitting those numbers at tight timings. And for a real laugh, go run some mem bandwidth limited benchmarks with a dual xeon haswell-E system like the z640/840. They absolutely curb stomp that fresh and shiny zen5 system. Because people designing cpus/systems know memory bandwidth/speed is almost never the bottleneck in someone's system when they're consumer/hobbyist gaming/working.
You should have just spent 10 minutes suggesting they install an AIO so they could OC the processor safely and actually enjoy a performance bump. Easily the cheapest way to enjoy some quick and easy tuning. As XMP often hurts overall performance.
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