CPU Noctua L9x76 Cooler Testing

Mark13

Cable-Tie Ninja
Original poster
Sep 5, 2020
147
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I conducted some additional testing with the Noctua L9x65 cooler with the A9x25 fan replacing the A9x14 fan on the same Aorus B550 motherboard with the Ryzen 7 4750G CPU I used to test the L12 Ghost Edition cooler. I tested the cooler alone and with both the Scythe Wonder Snail and Kaze Flex Black fans as intake (case) fans. All fans were runs at 100% PWM except for the third Kaze Flex Black test where I reduced the KFB fan to the slowest RPM it would maintain of 556 RPM. Noting that the CPU cooler fan RPM was being reduced by the intake fans at full RPM, I also reduced the intake fan to the slowest possible RPM and then tested the fan as exhaust at 100% PWM.

MakerBeam ITX Open Test Bench

Aorus B550 ITX MB; Ryzen 7 4750G; 32 GB Corsair LPX 3200 RAM; Metal block over NVMe drive not installed;
Noctua NT-H1 Thermal Paste
No Graphics Card installed
Noctua L9x65 Cooler with Noctua A9x25 Fan
Cooler fins run front (RAM side) to back (IO side) of MB.
Blender Classroom Render & Unigine Valley Ultra Settings

Room Temp 21C; CPU & Case Fan(s) PWM 100% except column 4; Temp Sensor TZ10 read 16.8C on all test runs;
(Case) fan placed blowing air on RAM side of MB

CPUID HWMonitor Readings:​
(Case) Fan​
None​
Scythe WS​
Scythe KFB​
Scythe KFB​
Scythe KFB​
Blender Render Time​
10.36.36​
10:37.58​
10:36.38​
10:36.87​
10:30.64​
Temp Sensor 0​
43​
43​
44​
44​
42​
Temp Sensor 1​
45​
44​
45​
45​
43​
Temp Sensor 2 CPU​
77​
78​
79​
78​
76​
Temp Sensor 3 PCI​
21​
21​
21​
21​
21​
Temp Sensor 4​
45​
43​
44​
44​
42​
Temp Sensor 5​
42​
42​
43​
42​
40​
CPU Pkg Max Temp​
77.9​
78.6​
79.8​
78.5​
76.4​
CPU Pkg Max Wattage​
88.9​
88.94​
89.17​
88.98​
89.02​
NVMe Top 970 Evo +​
44​
44​
45​
44​
42​
I-GPU Max Temp​
61​
61​
63​
62​
59​
CPU Fan Max RPM​
2027​
1967​
1985​
2020​
2020​
Case Fan Max RPM​
2445​
1584​
556​
1569​
Case Fan Direction​
Intake​
Intake​
Intake​
Exhaust​