I did a small render in SolidWorks 2018. CPU temperature climbed to 105°C . But system was running stable . I ran another render next day just to see what might happen and again, temperature was climbing pass 80°C therefore I stopped the render. As soon as I stopped the rendering, within 2 seconds, temperature dropped back to 64°C. Running Forza Horizon 4 in 4K and maximum CPU temp. reported was 78°C. Dropping CPU temp. from 80 to 64 quickly after the process ended means, heat dissipation in CPU is o.k. isn't it? (No problem in thermal paste). I used ASUS Ai SuiteIII came with the mobo to monitor together with AMD Ryzen Master software.
highly appreciate some expert comments on this to save my CPU (and mobo).
Ryzen 5 2600 with stock AMD Wraith Stealth cooler
ASUS ROG STRIX X470-F GAMING mobo (BIOS 4024)
G.Skill TridentZ F4-3200C160-16GTZB @ 3,200MHz
MSI Radeon RX 580 8GB GDDR5 ARMOR OC Graphics Card at PCIEX_16 socket
Samsung 970 EVO 250GB PCIe Gen 3.0 x4, NVMe 1.3 on M.2_1 socket (boot drive)
Samsung 840 EVO 120GB SSD (StoreMI fast tier)
WD WD10EZEX 1.0TB 7,200RPM (StoreMI slow tier)
ASUS DRW-24D5MT DVD Writer
Gigabyte G750H 750W ATX power supply (on APC BACK-UPS 1250I off-line UPS)
LG 27UD58-B 27" 4K Display
Marvo CA-209 mid tower case
2 x 120MM front fans (RAIDMAX COBRA, 45CFM)
1 x 120MM top fan (CoolerMaster Silent Fan 120 SI1, 44CFM)
1 x 120MM rear fan (stock casing fan, 30CFM??)
Fans optimized using ASUS Ai Suite III Fan Xpert 2 utility