KryoZon S9 Review: TrueEasyTech's 89.3% Stress Test

TrueEasyTech took the S9 from a water container to a visibly frozen plate

Test round: Setup and freeze demonstration. TrueEasyTech first laid out the S9's external loop: the round phone-side cooling head, two liquid tubes, the inline controller, and a compact pump. At 01:24 in the original video, the pump appears at the end of the tubing. He then submerged it in a glass water container before connecting power, a sequence that makes the working layout easy to follow.

The controller presents High, Low, and AI choices. TrueEasyTech selected High for this test. That choice matters because the later benchmark result belongs to this specific setup, not to every mode or reservoir configuration. The video did not record room temperature, ambient humidity, reservoir volume, or flow rate, so those conditions remain outside the result.

The exposed-plate sequence provided the first strong visual result. The controller displayed approximately -9°C, TrueEasyTech placed water on the uncovered plate, and the following frames showed an irregular frozen layer across the surface. His reaction stayed positive throughout the sequence, and the visible change made the cooling head's cold-side behavior immediately legible before the phone test began.

TrueEasyTech then attached the S9 near the RedMagic processor area while leaving the camera module uncovered. He waited for the controller display to return to roughly -9°C before starting the benchmark. As the phone added heat, he narrated the display moving toward -2°C by the end. Those readings track the S9 controller during this run; the separate 3DMark monitoring page supplies the phone-side temperature range discussed below.

Wild Life Extreme uses a 20-minute sustained-load sequence

Benchmark method: 20-minute Wild Life Extreme Stress Test. UL Solutions' Wild Life Extreme overview explains that the stress test loops for 20 minutes to show how performance changes under prolonged heavy load. The official 3DMark Android page also describes Wild Life Extreme as a demanding test for newer Android devices.

According to the UL Solutions stress-test result guide, frame-rate stability is expressed as a percentage; a higher score means performance under load was more stable and consistent.

TrueEasyTech's S9-cooled RedMagic completed all 20 loops at 89.3% stability

TrueEasyTech selected this sustained graphics workload rather than a short peak benchmark. In his video, the RedMagic completed the 20-loop sequence with the S9 attached and running in High mode.

The result screen is the clearest summary of the run. It identifies the device as RedMagic 11 Pro / 11 Pro+, dates the result September 17, 2026, and reports a 7,023 best loop, a 6,271 lowest loop, and 89.3% stability. Dividing 6,271 by 7,023 gives 89.29%, which rounds to the displayed stability figure. The 20-loop graph descends from the opening score and then stays within a comparatively narrow band through the remaining loops.

TrueEasyTech's result page showed a 7,023 best loop, 6,271 lowest loop, 89.3% stability, 100% to 77% battery, and 26°C to 41°C temperature. Source: TrueEasyTech

TrueEasyTech called the result impressive and pointed through the loop graph on screen. His displayed 89.3% figure is the strongest positive observation in the video because it summarizes consistency across the complete stress sequence.

The monitoring page keeps score, temperature, battery, and FPS in one view

TrueEasyTech scrolled from the loop summary to 3DMark's performance-monitoring panel. The page showed the battery moving from 100% to 77%, temperature moving from 26°C to 41°C, and a frame-rate range of 25 FPS to 49 FPS. These values belong to the same completed benchmark result, which lets readers connect the headline stability figure with the session's displayed operating range.

The controller and benchmark values describe two different measurement locations. The controller moved from approximately -9°C toward -2°C as load continued, while the 3DMark page reported the phone's 26°C to 41°C range. Keeping those readouts separate preserves what each screen directly shows and avoids treating the cold-head display as a processor temperature.

TrueEasyTech's earlier RedMagic screen adds an 8.7-point stability comparison

Test round: Earlier RedMagic comparison. TrueEasyTech placed the S9-cooled result beside an earlier RedMagic 11 Pro / 11 Pro+ result. The two visible stability figures are 89.3% for the water-cooled screen and 80.6% for the earlier screen, a difference of 8.7 percentage points. In the video, he used this side-by-side view to focus attention on how consistently each run held its own loop performance.

The stability view is favorable to the S9-cooled run, while the absolute loop scores tell a separate story. The earlier result shows a higher 8,033 best loop and a higher 6,477 lowest loop. For that reason, the comparison supports a narrower and more useful statement: TrueEasyTech displayed a higher stability percentage in the S9 run. The two screens do not establish a general score increase or assign the full 8.7-point gap to one variable.

The dates make the boundary visible rather than speculative. The cooled run is dated September 17, 2026, and the earlier screen is dated April 6, 2026. A benchmark version change, phone state, software, and ambient conditions may differ between those sessions. TrueEasyTech raised the possible 3DMark update himself and then centered his interpretation on stability. That framing preserves the positive result while keeping the comparison tied to what the two screens actually contain.

The KryoZon S9 result is most useful as a sustained-load reference

A 20-loop stress test asks a different question from a single benchmark pass. The opening loop captures the phone's short-burst output, while the later loops show what remains after the device has carried heavy graphics load for much longer. TrueEasyTech's result moved from 7,023 at its best to 6,271 at its lowest and finished with 89.3% stability. That combination gives mobile gamers a concrete sustained-load reference rather than one isolated peak score.

The 25 to 49 FPS performance range also gives the result practical shape. It is the range displayed by 3DMark for this synthetic workload, not a prediction for a particular title or graphics preset. A game with a different engine, resolution, frame cap, power profile, or session length can behave differently. The useful observation is that the RedMagic completed the full 20-loop sequence while the S9 setup remained active and the monitoring record stayed available from start to finish.

The external loop changes the setup, not only the phone attachment

The KryoZon S9 uses a phone-side cooling head connected by tubing to a submerged pump. In TrueEasyTech's run, the pump sat in a water container, the controller was powered by USB-C, High mode was selected, and the cooling head was positioned near the processor area. Readers evaluating the same type of long session should treat those setup details as part of the observed result. Reservoir conditions, room conditions, phone placement, and mode selection all belong in any repeatable comparison.

The controller's rise from approximately -9°C toward -2°C is useful because it shows the cold-head readout responding as the RedMagic added heat through the test. The phone-side monitoring page then showed 26°C to 41°C. Together, the two displays illustrate an active system under changing load without collapsing two different sensors into one temperature claim.

Stability is the cleanest number to carry into a game-specific test

For a player, the next useful check is consistency in the game they actually use. Record the title, graphics preset, frame cap, room conditions, starting battery level, S9 mode, and session duration. Then compare frame pacing and device monitoring across repeated sessions under the same conditions. TrueEasyTech's 89.3% result supplies a strong creator example of sustained benchmark consistency; a game-specific repeat turns that example into a device-and-title decision.

TrueEasyTech's video is especially valuable because the setup, exposed-plate behavior, full result page, monitoring page, and earlier comparison all appear in one source. The sequence lets readers inspect each stage directly instead of relying on a detached summary. For the RedMagic 11 Pro / 11 Pro+ shown here, the central positive result remains the complete 20-loop run and its displayed 89.3% stability.

Frequently Asked Questions

What was the strongest result in TrueEasyTech's KryoZon S9 test?

The RedMagic 11 Pro / 11 Pro+ completed the 20-loop Wild Life Extreme Stress Test with a 7,023 best loop, a 6,271 lowest loop, and 89.3% stability. TrueEasyTech showed all three values on the final 3DMark result page at 08:28 in the original video.

What does 89.3% stability mean in this result?

It describes the relationship between the lowest and best loop in this completed stress test. The displayed scores, 6,271 and 7,023, produce 89.29% when divided, which rounds to 89.3%. UL Solutions describes a higher stability percentage as more stable and consistent performance under load.

Was approximately -9°C the RedMagic processor temperature?

The approximately -9°C value came from the S9 controller display during the setup and early run. It was not a processor junction-temperature reading. The separate 3DMark monitoring page displayed the phone's temperature range as 26°C to 41°C.

How should the 89.3% and 80.6% RedMagic results be compared?

They are best read as the stability comparison TrueEasyTech displayed: the S9-cooled screen shows 89.3%, and the earlier RedMagic screen shows 80.6%, an 8.7 percentage-point difference. The result dates differ, a 3DMark version change may be involved, and the two screens are not a same-session controlled A/B.

Where can readers check the complete test?

The complete source is TrueEasyTech's video, Can Extreme Water Cooling Eliminate Snapdragon 8 Elite Gen 5 Throttling?. The timestamp links in every figure open the exact scene used for that caption.