Hey there, let's break this down in plain terms since you're building your first PC—no confusing jargon, I promise!

First, let's clarify what those speed numbers actually mean:

• Intel's official spec of 5600 MT/s for the i7-14700K is the JEDEC standard supported speed. This is the "safe, out-of-the-box" speed: if you plug in DDR5 RAM rated for 5600 MT/s, it'll work perfectly without you changing any settings. Intel sets this as a conservative, guaranteed stable limit for all units of that CPU model.
• The ROG Strix Z690-G's 6000 MT/s support refers to XMP 3.0 (Extreme Memory Profile) overclocking. This is a feature where RAM manufacturers pre-test their modules at higher speeds, save those optimized settings (frequency, timings, voltage) directly on the RAM chip, and motherboards like the Z690-G let you enable these profiles with a single toggle in the BIOS.

To answer your core question: Yes, your 14700K can absolutely run DDR5 RAM at 6000 MT/s stably, assuming you use compatible RAM and enable XMP. Here's why:
Intel's official specs are intentionally conservative. The memory controller in 13th and 14th Gen Core CPUs (like your 14700K) has built-in headroom—it's not hard-locked at 5600 MT/s. As long as your RAM is rated for 6000 MT/s with XMP 3.0, and your Z690-G's BIOS supports that profile, you'll be able to push past the official 5600 limit without manual tweaking.

For a beginner, XMP is the easiest way to get faster RAM speeds: just boot into your motherboard's BIOS (usually by pressing Del or F2 right after turning on the PC), look for the XMP option (it might be under "Overclocking" or "Memory" settings), select the 6000 MT/s profile, save changes, and reboot. Most of the time, this works flawlessly with 14700K + Z690 combinations.

A quick heads-up: In rare cases, some CPU memory controllers have slightly worse "silicon lottery" luck, meaning they might not handle 6000 MT/s perfectly. If you see blue screens or crashes after enabling XMP, you can either try a lower XMP profile (like 5800 MT/s) if your RAM has one, or revert to the default 5600 MT/s. None of this will damage your hardware—it's just a matter of finding the stable sweet spot for your specific components.

备注：内容来源于stack exchange，提问作者martinotecco