The new 9900ks are significantly affected due to the KS issue.
The new 9900ks are significantly affected due to the KS issue.
I visited our nearby electronics store recently and discovered they have a fresh batch of 9900k's. I’m a friend of the owner, and he purchased one for me yesterday at 369€—about 130€ less than usual here. He told me his CPU doesn’t even hit 5 Ghz all-core, just like mine. All the CPUs they delivered are R0 steps and work great when overclocked. Except at 5 Ghz. My chip runs around 4.9 Ghz with a 4.7 Ghz cache at 1.26v Primestable (29.x with AVX and FM3), but 5 Ghz and 4.3 Ghz is not possible, even at 1.43v (with a slight boost to 1.392v). It crashes within seconds in the new NFS Game or Cinebench R15. His chip behaves the same. Running at 4.9 and 4.7 around 1.29v with 5 Ghz isn’t working, maybe that’s the new normal now? Since Intel seems to be pushing their predefined models.
You seem to be asking about your motherboard model. Either you missed the lottery or you're using an older system. What model are you running?
The main focus is clear. If we had better samples, about 80% would pass the test. Z390 Extreme4 works fine. A 9900k operates at 5 GHz on a mid-range Z370 board. He handles a Maximus Hero.
I believe those two motherboards aren't ideal for the i9. They advertise 5GHz readiness across all cores, but real-world performance might be limited.
I see he doesn't receive the advertised speed regardless of what he pays. Yet, perhaps he thought he got a deal for 20% off, but it felt like only 90% of the original value—disappointing since he was told it would be worth 100%. Still, it's a small loss compared to the full price he expected.
It might be similar to AMD, where they claim 4.2GHz, but the actual performance rarely reaches that level except briefly. If your CPU ever hit 5.0 without issues, it’s not misleading advertising—though if no one takes action, these companies can operate freely.
The 100MHz frequencies aren't an issue because the cache operates smoothly at 4.7. I achieve better scores in Cinebench R15 and R20 with 4.9 and 4.7 cache compared to 5.0 and 4.3 cache. The system runs quite well at 1.264v (about 55-60°C during games), and I discovered a new high-performance AVX stress test for the latest game.