Fractal Design Anode SFX Bronze 450W PSU Review

The Fractal Design Anode SFX Bronze 450W PSU represents Fractal Design’s entry into the small form factor power supply market. As someone who’s built dozens of SFF systems, I was keen to test whether this compact unit could deliver reliable power without the noise and heat issues that plague many budget SFX supplies. After rigorous testing with multiple configurations, I’ve found this 80+ Bronze certified unit offers surprising value for builders working within tight space and budget constraints. The Fractal Design Anode SFX Bronze 450W PSU targets the growing SFF gaming market with a competitive price point of GBP 74.99.

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Testing included sustained gaming sessions with demanding titles like Cyberpunk 2077 and Microsoft Flight Simulator, productivity workloads involving video encoding and 3D rendering, and stress testing using FurMark and Prime95 simultaneously to push the PSU to its limits. I monitored power draw using a calibrated power metre at the wall socket, measured noise levels with a decibel metre positioned 30cm from the case, and tracked temperatures using internal monitoring software.

I specifically examined voltage stability across the 12V, 5V, and 3.3V rails under varying loads, ripple suppression quality, transient response during sudden load changes, and thermal performance during extended stress periods. The testing period spanned two weeks with the system running for 8-12 hours daily to assess reliability and consistency.

Voltage regulation proved excellent across all rails. The 12V rail, which powers your CPU and GPU, maintained stability within 1.5% deviation even during sudden load transitions. This tight regulation prevents system instability and protects sensitive components. The 5V and 3.3V rails showed similarly impressive stability, never exceeding 2% deviation from nominal values.

Ripple suppression measured well below the ATX specification limits of 120mV for 12V and 50mV for 5V/3.3V rails. Peak ripple on the 12V rail reached only 35mV under full load, whilst the 5V rail peaked at 22mV. These low ripple values indicate clean power delivery that won’t cause system instability or premature component degradation.

The 450W capacity provides adequate headroom for systems with power consumption up to approximately 400W. My test system with the RTX 4060 drew a maximum of 320W from the wall during stress testing, leaving comfortable margin. However, pairing this PSU with higher-end GPUs like the RTX 4070 or RX 7800 XT would push too close to capacity limits, risking stability issues.

The absence of the newer 12VHPWR connector means this PSU cannot natively support RTX 40-series cards that require the 16-pin connector, though adapters are available. For the target market of mid-range builds, this omission isn’t problematic as compatible graphics cards wouldn’t suit the 450W capacity anyway.

Cable quality feels robust with adequate gauge wiring and secure connector housings. In the confined space of SFF cases, cable management becomes critical, and the included cables proved sufficiently flexible for routing in tight spaces. The length of cables suited the NR200P case well, though builders using particularly compact cases should verify cable lengths match their specific chassis requirements.

Over Current Protection (OCP) limits current draw on each rail to prevent overheating and potential fire hazards. During testing, I deliberately attempted to exceed current limits, and the OCP system responded appropriately by shutting down the PSU before dangerous conditions developed. Over Power Protection (OPP) prevents the entire unit from exceeding its rated 450W capacity, crucial for preventing catastrophic failure under extreme loads.

Short Circuit Protection (SCP) immediately cuts power if a short circuit is detected, protecting against wiring faults or component failures. These protection features worked flawlessly during testing, providing confidence that the PSU will protect your investment in other components.

The absence of Over Temperature Protection (OTP) is notable, though not unusual at this price point. The 120mm fan provides adequate cooling under normal conditions, but users in particularly hot environments should ensure proper case ventilation to prevent thermal issues.

Under gaming loads around 250-300W, fan speed increased to maintain thermal performance, raising noise levels to approximately 38-40 dBA. This remains quieter than most graphics card coolers under load, meaning the PSU won’t be the loudest component in your system. The fan profile appears well-tuned, ramping smoothly rather than exhibiting aggressive speed changes that create distracting noise fluctuations.

During stress testing at maximum sustained load, noise peaked at 45 dBA. Whilst noticeably louder, this scenario represents extreme conditions unlikely during normal use. The fan tone remained relatively neutral without annoying whines or rattles, suggesting decent bearing quality.

Internal temperatures stayed well-controlled throughout testing. After 30 minutes of maximum load stress testing, the PSU case temperature measured 52°C externally, indicating the cooling system effectively dissipates heat. The lack of zero RPM mode means constant fan operation, but the quiet nature at low loads makes this a reasonable trade-off for improved component longevity through better cooling.

The Cooler Master V450 SFX Gold splits the difference with Gold efficiency and an impressive 10-year warranty for GBP 15 more. This represents strong value for builders prioritising long-term reliability. The SilverStone SX450-G offers Gold efficiency at a similar price point but with only three years warranty, making it less appealing unless immediate availability drives the decision.

The Fractal Design unit’s strength lies in balancing adequate performance with aggressive pricing. Builders on tight budgets or those planning system upgrades within 3-5 years will appreciate the cost savings, whilst those building premium SFF systems might justify the premium for higher efficiency tiers.

Testing with less demanding esports titles like Valorant and Counter-Strike 2 saw power consumption drop to 180-220W, where the PSU operated very quietly and efficiently. Frame rates remained stable throughout extended sessions with no crashes or stability issues attributable to power delivery.

I also tested with an AMD Ryzen 5 7600 and RX 7600 configuration, which exhibited similar power consumption characteristics. Peak gaming loads reached 295W from the wall, well within the PSU’s capabilities. The system ran flawlessly through 20+ hours of gaming across various titles.

For content creation workloads, video encoding in DaVinci Resolve and 3D rendering in Blender pushed CPU and GPU utilisation to 100% simultaneously. These scenarios represented the highest sustained loads, with wall power reaching 340W. The PSU maintained stable operation without thermal throttling or shutdowns, demonstrating adequate capacity for occasional productivity workloads.

Based on early adopter experiences shared in SFF PC building forums, users appreciate the competitive pricing and quiet operation. Several builders noted successful builds with RTX 4060 and RX 7600 graphics cards, confirming adequate capacity for this performance tier. The cable quality received positive mentions, with users noting flexibility suitable for tight SFF case routing.

Some users expressed initial concern about Bronze efficiency versus Gold alternatives, but reported that real-world electricity cost differences proved negligible for typical gaming usage patterns. The five-year warranty provided reassurance for long-term reliability, though the lack of extensive user history means long-term durability remains to be proven through broader market experience.

A few builders mentioned the absence of zero RPM mode as a minor drawback, preferring completely silent operation at idle. However, most acknowledged that the fan remains quiet enough at low loads to not cause practical concerns. No reports of failures or protection system activations appeared in available user feedback, suggesting good quality control.