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Riotoro Enigma 850W PSU Review

Riotoro is a newly founded company that's currently involved in the PSU, chassis, cooling, and gaming peripheral markets. It only has two PSU lines with three total members, and today we're looking at the Enigma 850W, its flagship offering.

Protection Features, Evaluated

Check out our PSUs 101 article to learn more about PSU protection features.  

Our protection features evaluation methodology is described in detail here.

Protection Features
OCP12V: ✗ 5V: 31.4A (125.6%) 3.3V: 33.1A (132.4%) 5VSB: 5.7A (190%)
OPP1074.28W (126.4%)
OTP✓ (115°C @ Secondary Heat Sink)
SCP12V: ✓ 5V: ✓ 3.3V: ✓ 5VSB: ✓ -12V: ✓
PWR_OKOperates Properly
SIPSurge: ✗ Inrush: NTC Thermistor & Bypass Relay

The OCP levels on the minor rails are set at normal levels, given our experience so far. The 5VSB rail can deliver almost double its capacity, at which point OCP triggers. Meanwhile, over-power protection is set below 130% of the unit's capacity. Over-temperature protection (OTP) is present and works well, while short circuit protection (SCP) exists on all rails. Finally, the power-good signal is accurate.

Unfortunately, there is no MOV in this unit's transient filter, so you get no protection against surges and spikes coming from the mains network. You'll definitely want to use the Enigma 850 attached to a surge protector and/or uninterruptible power supply (UPS).