9900K on the old Z390 board or a newer platform?
9900K on the old Z390 board or a newer platform?
Hey everyone, I hope everything’s okay. I’ve been out of the loop on PC hardware for a while, but my 8600K is starting to feel outdated. I’m running into slowdowns with Forza at 144 Hz and background tasks like YouTube videos, where CPU usage hits 100% even when overclocked. I have a Gigabyte Z390 UD ATX board and 3200 MHz Samsung B-die RAM. Ideally, I’d install a 9900K to boost performance, but those chips are pretty pricey for their age and offer better performance per clock while still supporting DDR4. I’m considering a used 12900K for around $250 and a Z690/Z790 board with Wi-Fi 6/6E as a possible upgrade. It might cost about $120 more, but it would require more power and could strain my cooler setup. A 9900K is a straightforward replacement, but it doesn’t justify the cost given what I already have. There are still other performance issues to address in my system.
Execute it within a power cap. When idle, the 12900K uses minimal energy, and during higher demand it can maintain your chosen consumption (65W, 125W, etc.). You have the option to disable that limit later if you require extra performance, but for now it helps control usage. Just run it at 12900K—no need to change to a 9900K unless you prefer avoiding a hardware swap.
9900k isn't a good deal if the 12900k is too expensive. If the 120-150$ range looks appealing, consider a used 5800x for that price or a used 5800x3d around $200. The 12600k seems to hover near $170, while the 12700k might drop to about $200. Some listings show prices around $250, but those are from recent deals on the FB marketplace. The 5800x is the least powerful among these options, but its main advantage over the 12600k is the availability of cheaper used boards—like a B3/450 for around $50—or a Z690 for about $100. The B660 is slightly lower but still decent, especially if you can overclock and get better I/O and VRM performance.
It's confusing too. An 8700K costs around $125. The 9900K is definitely a serious issue. Trying to manage it feels like handling a volcano with a heatsink. It's not much worse than the top models now, but even my 8086K can be cooled down with a modest overclock. A 9900K was tough to air cool even at its base specs.
I realized a few years ago that pushing high-end components beyond their limits wasn’t worth it. The gains in speed weren’t enough to justify the power use and heat they created. After that, I upgraded to a Ryzen 5 5600 and an RX 6700 (not an XT model) and figured there’s little value in overclocking anymore when you can safely lower the voltage without losing performance. I’m not sure if this shows how advanced the chips are or if makers aren’t trying to get more out of them.