The i5-12400 LGA 1700 heat spreader is warped or bent.
The i5-12400 LGA 1700 heat spreader is warped or bent.
I was taken aback by this situation. I believed such issues were limited to premium processors. My setup includes an i5-12400 in an Asus ROG Z760 ITX. For roughly six months it had the Intel OEM heatsink, but it arrived damaged during shipping from O'ahu to Maui. I replaced it with a Noctua NH-L9x65 a few weeks ago. I applied the thermal paste thinly only on the heatsink, as I've done for many years. Recently, I purchased an i9-12900k to swap in for the i5. When I removed the Noctua paste, I noticed the contact was shaped like an hourglass or bowtie. It seems the heat spreader had been bent by the tabs on the latch! After installing the new i9 with paste applied to both the heatsink and CPU, and adding a small blob in the center for extra security, I ordered a contact frame plus one for my AM5 system.
Every LGA 1700 chip tends to warp, but this mainly affects high-end models due to their power consumption. The 12400 usually stays under 65W and remains manageable even with subpar thermal contact. Remove the AM5 mounting bracket. This connector lacks the design weaknesses that lead to bending in LGA 1700 chips, and the increasing thickness of these processors isn’t a concern. Using one offers no cooling advantage, so you risk voiding your warranty and encountering unpredictable memory behavior.