In order to test the CPU cooler we used the following configuration:

• CPU: AMD Ryzen 5 5600X
• Thermal compound: Already applied to the pump
• Case: bequiet! Silent Base 802
• Case fans: 2x140 bequiet! Silent Wings 3 High-Speed RPM speed controllable via SmartFan BIOS + Asus Xpert4 software
• CPU Fan: Stock 120mm
• Motherboard: Asus X570 E-Gaming with 4603 BIOS
• Memory: 2x16GB G.skill Trident Z RGB CL14 @ 3200MHz CL14 (XMP Profile) @ 1.35V
• PSU: be quiet! Straight Power 11 650Watt
• HDD: Crucial MX500 SSD
• VGA: Asus 1060 6GB Dual
• Ambient room temperature ~ 25 Celsius (with AC climate control) - Environment Temperature measurements: Precision Gold N09AQ Envirometer Meter
• Sound measurements at 1m distance: miniDSP UMIK-1 microphone with calibration file and latest REW software
• Operating system: Windows 10 x64 with all the latest updates installed
• Software: AIDA64 / HWInfo / OCCT Enterprise Edition (Latest builds)

Before each run, we left the CPU cooler cooled down and we reset the OCCT Enterprise Edition values to be accurate.

We set the CPU fan speeds at "Smart Mode" with the Asus Xpert4 software. The case fans were also set at SmartFan mode with the option for Auto Fan Stop at low loads down to 0% for the two front fans and auto for the back case fan.

The CPU fans were detected from the Asus motherboard and gave us the following fan curve

Bios settings:

• Ai Overclock Tuner: D.O.C.P -> XMP DDR-3200 CL14
• BCLK Frequency: 100MHz
• FCLK Frequency: 1600MHz
• CPU core ratio: Auto
• TPU: Keep Current Setting
• Performance Bias: Auto
• VDDCR CPU Voltage: 1.100V
• VDDCD SOC Voltage: 0.900V
• DRAM Voltage: 1.350V (XMP)
• Precision Boost Overdrive: Auto
• Rest BIOS options: Auto

All tests were done with OCCT Enterprise Edition with a 30min run and we noted all temperatures as were noted from the software. For maximum temperature, we used the following settings:

• Data Set: Small
• Mode: Extreme
• Load Type: Steady

The first test was to see how the AIO performs either in IDLE or Full load. As the OCCT build-in graph showed, the system at idle was running at 42 Celcius and when at full load at 60 Celsius max. It's possible to further improve performance if you tweak the fan curve but for now we left everything stock, as most users will do.

The DeepCool LT720WH 360mm AIO perform much better than other AIO solution (due to its bigger radiator) and almost reaches the top, where we can find the Noctua NH-D15 and the be quiet! Dark Rock Pro 4. With a "better" fan curve at the Q-Fan of Asus, we are sure the average results would be much better.

Placing the miniDSP UMIK-1 microphone around 1m from the closed case, we were pleased to get very low overall case+cpu cooler noise. The DeepCool LT720WH 360mm produces very low noise either idle or under the above full load. The low-noise adapters do work and lower around 0.5dB the overall noise at the distance of 1m.

Overclocking

Bios settings:

• Ai Overclock Tuner: D.O.C.P -> XMP DDR-3200 CL14
• BCLK Frequency: 100MHz
• FCLK Frequency: 1600MHz
• CPU core ratio: 45Χ
• TPU: Keep Current Setting
• Performance Bias: Auto
• VDDCR CPU Voltage: 1.18125V
• VDDCD SOC Voltage: 0.900V
• DRAM Voltage: 1.350V (XMP)
• Precision Boost Overdrive: Auto
• Rest BIOS options: Auto

All-in-one coolers have great performance when you perform overclock. Let's see how the temperature rises when running the above load. The CPU cooler starts at 42 Celsius and at full load gives around 80-81 Celsius and after the test is finished, almost instantly returns back to 40-42 Celsius idle performance.

Getting the average and max temperature of all cores, the DeepCool LT720 WH 360mm got third place behind the Noctua NH-D15, and the be quiet! Rock Pro 4, which both include 140mmfans.

Lastly, we also tested if and how much the performance is affected after using the included low-noise adapters for the radiator fans. We ran a 30min OCCT Stress test and at the start, we saw that there was some performance difference, which however as time passes seems to get reduced. This was done with the OC profile of our tests, so we don't expect any real-life loss after using the low-noise adapters with the DeepCool LT720WH 360mm All-In-One cooler.