PC malfunctioning at 14900k with RTX4090 integrated.
PC malfunctioning at 14900k with RTX4090 integrated.
I worked on mITX builds for seven years. Without strong negative pressure, hot spots often appeared on the motherboard or even the graphics card's backside. This became an issue with GPUs around 200W and CPUs around 100W, such as with a Titan X paired with a 4790k. The 14900k maintained decent performance in games at 105W, though 105-150W is currently the sweet spot for Intel, while 105W is problematic for AM5. The RTX 4090 shows minimal impact at around 90% TDP (about 400W), still generating a lot of heat in a compact form. To put it in context, my Fractal Design North works well as an SFF solution for an overclocked RTX 4090. For ideas beyond lowering maximum TDPs, I’d need some panel-less visuals, but I’m sure the stability concern ties back to this situation.
Consider these useful adjustments before you try again. First, ensure any MCE configuration is turned off if your motherboard supports it. Also, reset the CMOS for a clean start. Although you mentioned trying some options, I don’t recall the exact numbers—here are some alternatives:
- Adjust SVID behavior to Typical Scenario or Trained.
- Set short duration turbo power = 253; long duration turbo power = 253.
- Set max core/cache current or current limit = 307Amp.
- Set Package Power Limit 1 = 253; Package Power Limit 2 = 253.
You might also experiment with:
- Short duration: 288; PL1
- Long duration: 288 PL1, 253 on PL2, same 307Amp setting.
Also, use LLC3 or LLC4 (Load Line Calibration controls impedance/slope of the load line, and “load line” Adaptive or Active voltage positioning).
Other options:
- Load Line Spec (LLC): 1.100 mOhm (standard/normal)
- DC Load Line: 1.100 mOhm
- AC Load Line: 1.100 mOhm
- For memory stability, aim for:
- DRAM VDD: ≥1.365V
- DRAM VDDQ: ≥1.8V
- DRAM VPP: ≥1.8V
- CPU VDDQ: ~1.4V (under)
- VCCSA/SA Voltage: 1.11–1.20V (up to 1.4V is okay)
- VCCIO: slightly lower, under 1.4V
If these don’t stabilize your 96GB kit, consider lowering the memory speed (e.g., 5200MT/s or 4800MT/s) and see if stability improves.
After that, try removing one stick to check for compatibility issues—especially since 96GB can be demanding on IMCs.
As suggested by @rippy4500: Lock Performance Core Ratio or set All-Core Sync to 5.5–5.7GHz.
Ring and Cache settings:
- Ring: 4.4–4.7
- Cache: adjust accordingly
Keep experimenting with these tweaks until you find a stable configuration.
Thanks for checking. My system seems to be working fine now. I plan to experiment more. It's running smoothly at 4Ghz across all cores with a power limit of 253. I wish I had chosen an i5 earlier—better value would’ve saved me money and kept performance similar. I can return it via RMA, but there’s a risk of receiving the same or worse item, or seeing damage after some time. I hope Intel will take accountability. Is there any legal action possible?
They were expecting a lot from their CPUs, but what came out was a mess that needs fixing. It should have been simple and reliable right out of the box, working with any compatible motherboard and proper power delivery. Worse still, Intel hasn’t shared details or acknowledged mistakes, likely because they’re in conflict with AMD and won’t admit it. This isn’t just about competition—it’s about releasing a defective product marketed as perfect. That would still be okay if the problems were limited to lower-end boards, but high-end models are affected too, even worse.
I’d probably explore it further and review the settings I shared: mixing them in any way should significantly boost stability. To the extent that I’m confident you can surpass 4GHz All-Core. I wouldn’t feel too bad about that, though the out-of-box setup feels underwhelming with your CPU. I expect improvements will come once you fix the quirks and reach a more solid performance range—perhaps something like 5.4-5.6GHz All-Core paired with a 96GB memory kit at least in the 5200-5600MHz band. I’d also consider tweaking the E-Cores. Many users are successfully locking in around 4.2-4.4GHz, while trying to balance a stable Ring/Cache Ratio. Here’s a helpful reference that could clarify those options: Asus Maximus Z790 and Intel i9-13900k/14900k – an overclocking and tuning manual. | Overclock.net It’s honest, both 12th/13th/14th Gen and Zen4/AM5 have faced some platform challenges, mainly around DDR5 initially. There were also debates about the 7900x3D and 7950x3D regarding later performance. The same applies to the 14900K/14900KS with their stability concerns. Such issues are typical for newer architectures—just adapt accordingly.