DeepCool LS720 Review (Page 3 of 4)

Page 3 - Test Results

Out test configuration is as follows:

CPU: AMD Ryzen 5 5600X
Motherboard: MSI MAG B550 Tomahawk
RAM: Thermaltake TOUGHRAM XG RGB DDR4-4000 2x8GB
Graphics: EVGA NVIDIA GeForce RTX 3060 TI
Chassis: Corsair 5000D
Power: SilverStone Decathlon DA850 Gold 850W
Storage: Samsung EVO 970 1TB, Lexar NQ100 480GB
Operating System: Microsoft Windows 10 Pro

Compared hardware:
- DeepCool LS720
- ARCTIC Freezer A35 A-RGB
- ARCTIC Liquid Freezer II 280 A-RGB
- Cooler Master MasterLiquid PL240 Flux
- DeepCool AK400
- SilverStone Hydrogon D120 ARGB

All tests were run in our custom-built computer to best reflect real-life performance. The computer remained in the same place and room for all tests. The ambient temperature of the room was roughly 21 degrees Celsius. The thermal paste applied to each cooler was stock respective to their manufacturers to rate its performance. Sufficient time between testing was applied for the paste to settle. The fans on all coolers, if applicable, were connected to the same motherboard's 4-pin connector. The test computer was turned on and idling for at least one hour for the idling tests. High CPU load results were obtained using the Prime95 in place large FFTs test with a maximum number of worker threads for a minimum of 15 minutes and recorded when the temperature was deemed stable.

For the first test, I let my computer sit idle for a while. After about an hour, I shook my mouse to wake my computer up. We can see the DeepCool LS720 sat at around 34 degrees Celsius. This outdid all the liquid coolers other than the ARCTIC Liquid Freezer II 280 A-RGB, which was only cooler better than the LS720 by 1 degree. It goes without saying but the LS720 also outdid all air coolers by a fair bit. While this is a good start, idle tests do not give a full representation of the cooling capabilities, thus leading us into our load tests.

Starting Prime95 and giving the processor ample time to load all the cores and threads, we can see how the cooler performs when the processor is under heavy stress. The DeepCool LS720 performed just as well here, peaking at 57 degrees Celsius. Once again, this outdid all coolers besides the ARCTIC Liquid Freezer II 280 A-RGB, which was the only cooler better by 1 degree. This also surpassed all compared air coolers, although this is not a surprise. It should be noted at this point all liquid coolers in these tests performed very similarly in the stress tests with the largest difference being only 2 degrees. We observed the boost frequency throughout the test, which was 3.7 GHz across all cores. The DeepCool LS720 performed excellently in our tests.

Sound is often perceived differently by people, but we try to make our subjective audio tests as objective as possible. On a scale of 0 to 10, where 0 is silence and 10 is an EDM festival, I would rate the DeepCool LS720 around 3.5/10 when idle and 5.0/10 when under full load. This is not surprising due to the extra 120mm fan that adds to the noise output. The radiator fans emit a moderate level of noise when under full load. Under day-to-day use, these fans are quieter, although still audible. These fans may not be the quietest, but are also not obnoxiously loud by any means. One reality users will have to face when purchasing an AIO cooler is there will be more moving parts in the system, which makes for more sources of noise. The pump emitted a low humming sound at full speed, which was relatively quiet. At normal speed though, the pump is basically inaudible.

Page Index
1. Introduction, Packaging, Specifications
2. Physical Look - Hardware, Installation
3. Test Results
4. Conclusion