I should have considered this before purchasing a Noctua CPU cooler.
I should have considered this before purchasing a Noctua CPU cooler.
I completely overlooked downclocking a CPU. My HP Omen 30L Desktop PC has an i9-10850K, and the original air cooler was letting temperatures climb to 102°C, with an average around 68°C. Those spikes happened during gameplay, especially while playing MSFS 2024 and X-Plane 12—both demanding applications that push CPU and GPU to their limits. Since I was using 4K resolution, the CPU was definitely feeling the heat.
I purchased a Noctua NF-U9S cooler along with an extra Noctua 92mm fan (push-pull). After installing it, temperatures dropped significantly—no longer reaching 102°C, but hovering near 99°C. Increasing the fan speed helped, but I was still hitting 92°C. Trying to boost the fan speed further didn’t resolve the issue. Eventually, I decided to underclock the CPU, and that worked. Now my temperatures are down by about 20°C. The stock multiplier for the 10850K is 49 with a cache ratio of 43; I adjusted it to 41 and the cache ratio to 35, leaving the core voltage offset unchanged.
Now the CPU peaks at 72°C, and I’m still maintaining 30FPS in 4K with X-Plane NYC (HIGH settings), which remains quite challenging. I might reconsider using the stock cooler again. I should have remembered this trick.
Were you restricted by the cooler's size? If not, there are superior alternatives with 120mm or even 140mm HSFs available. The U9S falls short for your CPU, which is the main concern. It also seems the standard AIO wouldn't be ideal if your temperatures consistently reached that level.
The argument could also be directed toward the prebuilt option...if their design wasn't flawed, you wouldn't have had to invest extra funds into it. Just a note, the case was crafted by Coolermaster, which doesn't align well since this version diverged from their usual approach to optimal airflow.
I'll attempt to lower the core voltage offset in the HP Omen app since that's the sole adjustment option HP provides for power control.
Edit:
It's worth noting you're using a 240mm AIO while my standard model is 120mm. I reduced the core offset to -0.150v, which initially helped but caused a 82c reading. Then I lowered the multiplier from 49 to 47 and adjusted the cache ratio from 43 to 41. Now I briefly reach 71c before it settles between 56c and 62c.
Obviously you choose how you feel, but I believe you should consider the NOCTUA cooler. For the same price range, you can also find this option:
PCPartPicker Part List
CPU Cooler:
ID-COOLING FROZN A620 PRO SE 58 CFM CPU Cooler
($29.99 @ Amazon)
Case:
Cooler Master MasterBox Q300L MicroATX Mini Tower Case
($39.99 @ Amazon)
Total:
$69.98
Shipping, taxes, and available discounts are included
Generated by
PCPartPicker
2025-05-16 07:26 EDT-0400
Transfer the components from the Omen into the Cooler Master case, effectively finishing the setup. If the image you saw matches, AiO is likely around 120 mm, which seems inferior compared to most high-quality dual tower air coolers. I believe reducing the core voltage would be beneficial, but it won’t solve everything—this CPU still requires a solid cooling solution!
Thank you for the ideas. Before choosing the Noctua, I thought about the Frozn A620 because its height is 157mm and it wouldn’t fit in the Omen chassis. Now I’m leaning toward keeping the existing Omen 30L case. I’m also thinking about returning the Noctua setup to go back to the original AIO. The main reasons are that I like the appearance of the Noctua cooler inside the case and it performs slightly better in cooling than the stock AIO.
Well, it’s not entirely unreasonable if you’re adding power-hungry parts to your system and aiming for a compact case at a specific price. You’d likely face higher temperatures or more noise. That’s not bad design—it’s just a balance of cost, performance, and engineering decisions.