F1 2020 shows that faster RAM has a large impact on performance. … It won’t cost much more than 2,400MHz or 2,666MHz RAM. 3,600MHz is about where you start to hit a limit for good value. Kits faster than this tend to really jump up in price.

The RAM modules not present in the QVL list of a motherboard might have issues running at the speeds greater than 2667 MHz(if it supports speeds greater than that).

If the RAM kit is not on the QVL it doesn’t mean it won’t work. There are far too many kits for your motherboard manufacturer to test so naturally they’ll leave out some and in turn, the testing, to you.

Intel Core i7 processors are typically faster and more capable than Core i5 CPUs. The latest i7 chips offer up to six cores and 12 threads, making them better suited for advanced multitasking.

Yes. You will need to use a Z370 or Z390 motherboard in order to run RAM at that speed, but 3200MHz CL16 is a reasonable compromise on price and performance.

Intel unveiled the flagship Core i9-9900K, i7-9700K, and i5-9600K, along with its new Z390 chipset, last week. Now, the company has confirmed to Anandtech that one of the benefits of these CPUs is their ability to support 128GB of RAM.

If your motherboard can support faster RAM, then yes, your i9 will perform better by waiting less time for data. If your motherboard cannot use the faster RAM (it will just run slower) than you will be see any benefit.

Intel uses a number called the Thermal Design Power (TDP) to describe how much power their processors generate, with the i9 9900K rated at 95 watts. However, the amount of power it actually uses varies a lot, ranging from under 10 watts when idle to over 130 watts when running . . . Read more

You can run higher speed RAM by enabling the XMP profiles in the motherboards BIOS settings, this is technically considered an overclock on the memory speeds. So intel only specifies up to 2666MHz but the processor is capable of running higher speeds.

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