Side-by-Side Comparison
Corsair Nautilus II 240 RS ARGB vs Antec Ultra 240 ARGB
Standardized 5-pillar engineering audit, thermal telemetry, verified longevity metrics, and complete technical specification diff.
★ Recommended Winner
● HIGHLY RATED
Composite Score:
4.5
/ 5.0
Low-friction Magnetic Dome fans and an acoustically tuned FlowDrive 2S pump deliver dependable 240 mm liquid cooling performance.
▲ DOCUMENTED QUIRKS
Composite Score:
4.3
/ 5.0
A dependable 240 mm closed-loop cooler featuring low-noise pump operation, dual PWM fans, and broad multi-generation socket compatibility.
⚖️
Mizex Comparative Audit Verdict
The Corsair Nautilus II 240 RS ARGB earns the higher Mizex Composite Score (4.5 vs 4.3), leading across 5 of 5 engineering pillars. With superior ratings in Engineering & Architecture, Build Quality & Materials, Thermal, Power & Acoustics, Real-World Reliability, Buyer Value & Upgrades, it represents the superior reliability choice.
5-Pillar Engineering Telemetry
Detailed comparison across standardized normalized 1.0 – 5.0 engineering pillars.
Corsair Nautilus II 240 RS ARGB
Antec Ultra 240 ARGB
Engineering & Architecture
(30%)
Winner: Corsair Nautilus II 240 RS ARGB (+0.2)
4.5
4.3
Build Quality & Materials
(20%)
Winner: Corsair Nautilus II 240 RS ARGB (+0.2)
4.4
4.2
Thermal, Power & Acoustics
(20%)
Winner: Corsair Nautilus II 240 RS ARGB (+0.2)
4.3
4.1
Real-World Reliability
(20%)
Winner: Corsair Nautilus II 240 RS ARGB (+0.3)
4.6
4.3
Buyer Value & Upgrades
(10%)
Winner: Corsair Nautilus II 240 RS ARGB (+0.1)
4.7
4.6
Corsair Nautilus II 240 RS ARGB: Strengths & Caveats
✔ Advantages
- Acoustically tuned FlowDrive 2S pump dampens motor resonance during sustained loads
- Dual RS II ARGB fans utilize low-friction Magnetic Dome bearings for extended operational lifespan
- Precision-machined copper cold plate with pre-applied XTM60 thermal compound
- Broad socket retention system covers Intel LGA 1851 and AMD AM5 out of the box
✖ Documented Caveats
- Standard 1.02 in (26 mm) aluminum radiator core offers less thermal surface area than thicker 280 mm or 360 mm alternatives
- Factory-sealed closed loop precludes coolant servicing, flushing, or modular expansion
Antec Ultra 240 ARGB: Strengths & Caveats
✔ Advantages
- Quiet 2600 RPM pump operation rated below 23 dB(A)
- Comprehensive out-of-the-box socket compatibility including Intel LGA 1851/1700 and AMD AM5/AM4
- High-conductivity copper base plate for effective thermal interface contact
- Dual 120 mm ARGB PWM fans for synchronized airflow and lighting control
✖ Documented Caveats
- Maximum fan acoustics reach 33.05 dB(A) during peak PWM operation
- 240 mm radiator surface area provides less thermal headroom for extreme high-wattage overclocks than larger 360 mm formats
Technical Specification Comparison
Side-by-side spec alignment. Rows highlighted with subtle shading denote differing specifications.
| Specification | Corsair Nautilus II 240 RS ARGB | Antec Ultra 240 ARGB |
|---|---|---|
| Brand DIFF | Corsair | Antec |
| Model DIFF | Nautilus II 240 RS ARGB | Ultra 240 ARGB |
| Cooler Type DIFF | Liquid CPU Cooler (Closed-Loop AIO) | — |
| Radiator Dimensions DIFF | 9.45 x 4.72 x 1.02 in (240 x 120 x 26 mm) | — |
| Radiator Size Class DIFF | 240 mm | — |
| Radiator Material DIFF | Aluminum | — |
| Cold Plate Material DIFF | Copper | — |
| Thermal Interface Material DIFF | Pre-applied Corsair XTM60 | — |
| Pump Architecture DIFF | FlowDrive 2S | — |
| Fan Quantity DIFF | 2 | — |
| Fan Dimensions DIFF | 4.72 x 4.72 x 0.98 in (120 x 120 x 25 mm) | — |
| Fan Model DIFF | RS II ARGB | — |
| Fan Bearing Type DIFF | Magnetic Dome | — |
| Lighting DIFF | Addressable RGB (ARGB) | — |
| Socket Compatibility DIFF | AMD AM4, AMD AM5, Intel LGA 1700, Intel LGA 1851 | — |
| Cooler Type DIFF | — | All-in-One Liquid CPU Cooler |
| Radiator Dimensions DIFF | — | 240 mm (9.45 in) |
| Cold Plate Material DIFF | — | Copper |
| Fan Configuration DIFF | — | 2x 120 mm PWM Fans |
| Fan Noise Level DIFF | — | 33.05 dB(A) |
| Pump Speed DIFF | — | 2600 RPM |
| Pump Noise Level DIFF | — | <23 dB(A) |
| Lighting Type DIFF | — | ARGB Mirror Lighting Pump Head |
| Socket Support DIFF | — | Intel LGA 115X / 1200 / 1366 / 1700 / 1851 / 20XX, AMD AM4 / AM5 |
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