My B360 Core isn't cooling well in Tales of Arise, causing CPU throttling and lag. Should I check the pump RPM to find the bug?

During massive skill animations, my frame rate would randomly tank to below 50 FPS, and the stutter was painfully obvious. I pulled up my monitoring tools and saw the B360 Core pump was spinning at 2000 - 2200 RPM, yet the CPU temp was spiking from 60℃ to 85 - 90℃ in seconds—totally wrong. I tried ramping up the fans, but the air coming out of the radiator was barely warm, meaning the heat wasn't even leaving the CPU block. I tore down the radiator and found the fins completely choked with dust. After a deep clean with compressed air and double-checking the pump headers, the CPU temps dropped from 88℃ to 65 - 71℃ under the same load. I actually had a mini-heart attack when I accidentally loosened a tube fitting and saw a tiny leak, but tightening the O-ring fixed it. Pump is now steady at 2400 RPM. Hardware verification complete.