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Intel Core i9-12900KF

Physical Product · CPUs · 7 mentions · 1 subreddit · discussed in r/buildapc

Reddit take

Not enough linked mention summaries yet; the source excerpts below are the evidence.

Pros

  • overall you could go for a 12600kf, 12700kf or 12900kf.
  • I'm building a personal workstation pc but still wanna keep my 64gb of ddr4 in it, already bought myself a z790 ddr4 mobo and a 12900kf for the time being.
  • I'm running a 12900KF, it's a great CPU.

Cons

  • I have done some basic overclocking on it but I haven't put it under the kind of load I put it through right now so I can't yet know if the chip crashes at stock, I only have benchmarked it at stock but not actually used it and the bench...
  • tried undervolting it on V/F and whenever I undervolt anything above 5.2ghz it will make the pc not even be able to go into boot, i've tried as low as -.001. also I can only run 3500mhz ram freq on a kit that can normally run up to 3900-...
  • 1.53V is very high, I think the highest overclock I've seen for 12900K. It looks like the temps are safe and it's not thermal throttling much. As long as you have the cooling to sustain that level of heat, it will be okay. I don't think...
  • I plan on switching to intel but was wondering if I should go the safe route and go with 12900kf or just go straight with 14700kf

Sentiment

3 positive (43%) · 3 mixed (43%) · 1 negative (14%)

Trust + time weighted score: +28% · raw score 29%

What redditors said (7 of 7)

overall you could go for a 12600kf, 12700kf or 12900kf.
positive · u/C****8 · r/buildapc · comment · Mar 22, 2026 · open on Reddit ↗
I have done some basic overclocking on it but I haven't put it under the kind of load I put it through right now so I can't yet know if the chip crashes at stock, I only have benchmarked it at stock but not actually used it and the benchmark was fine but now even after using preset overclocks like ai and non-manual settings (+2boost profile) it would still crash even after removing all the undervolts and setting them to auto, could be the 1x8 adapter causing it?
negative · u/C****8 · r/buildapc · Mar 17, 2026 · open on Reddit ↗
tried undervolting it on V/F and whenever I undervolt anything above 5.2ghz it will make the pc not even be able to go into boot, i've tried as low as -.001. also I can only run 3500mhz ram freq on a kit that can normally run up to 3900-4000mhz stable. Might indicate that the chip is already degraded from it's previous owner
mixed · u/C****8 · r/buildapc · comment · Mar 16, 2026 · open on Reddit ↗
1.53V is very high, I think the highest overclock I've seen for 12900K. It looks like the temps are safe and it's not thermal throttling much. As long as you have the cooling to sustain that level of heat, it will be okay. I don't think degrading the chip is a major concern, Alder Lake chips seem to respond fine to voltage (unlike some Raptor Lake ones). It would take a very long time of use to possibly degrade the silicon, and then it would still work just the maximum clock speed would have to be dropped.
mixed · u/d****2 · r/buildapc · comment · Mar 15, 2026 · open on Reddit ↗
I'm building a personal workstation pc but still wanna keep my 64gb of ddr4 in it, already bought myself a z790 ddr4 mobo and a 12900kf for the time being.
positive · u/C****8 · r/buildapc · comment · Mar 8, 2026 · open on Reddit ↗
I plan on switching to intel but was wondering if I should go the safe route and go with 12900kf or just go straight with 14700kf
mixed · u/C****8 · r/buildapc · Feb 20, 2026 · open on Reddit ↗
I'm running a 12900KF, it's a great CPU.
positive · u/A****e · r/buildapc · comment · Jan 31, 2026 · open on Reddit ↗

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