SilverStone Triton 650Rz ATX v3.1 PSU Review

Protection Features

OCP (Normal @ 30.9°C) 12V: 81.00A (149.72%), 12.198V
5V: 23A (127.78%), 5.025V
3.3V: 24.2A (134.44%), 3.372V
5VSB: 4.5A (150.00%), 4.889V
OCP (Hot @ 44.1°C) 12V: 77.00A (142.33%), 12.207V
5V: 23.5A (130.56%), 5.023V
3.3V: 24.1A (133.89%), 3.369V
5VSB: 4.4A (146.67%), 4.882V
OPP (Normal @ 28.1°C) 975.383W (150.06%) *Didn’t shut down
OPP (Hot @ 42.7°C) 890.705W (137.03%)
OTP ✓ (109°C @ Secondary Side)
SCP 12V to Earth: ✓
5V to Earth: ✓
3.3V to Earth: ✓
5VSB to Earth: ✓
-12V to Earth: ✓
PWR_OK Proper Operation
UVP (Full Load @ 90V)
UVP (No Damage @ 80V)
Conducted Emissions EN55032 & CISPR 32
NLO
Fan Failure Protection
SIP Surge: MOV
Inrush: NTC & Bypass Relay

The 12V OCP triggering points are set at a high level. At least, there is a notable difference between normal and high temperatures. The OCP triggering points on the minor rails are not excessively high, but they are similar and 5V higher under increased temperatures compared to those at normal temperatures. Moreover, the PSU didn’t shut down during OPP evaluation under normal temperatures at up to 150% load, which is already too high, but it did, thankfully, at high temperatures. The rest of the protection features are present, but fan failure protection, which should be standard on every modern PSU platform, is not present.

EMC Pre-Compliance at a Glance

Every electronic device, including PSUs, can be an EMI source, which, depending on the amount of EMI emitted, can affect the proper operation of nearby devices. EMI can, in some extreme cases, even render them unusable. Some standards have been established to minimize electromagnetic interference (EMI) noise. The corresponding standards for IT (Information Technology) products are CISPR 32 and its derivativeEN 55032, which applies to products sold in the EU. In the EU, every product bearing the “CE” marking must comply with the EN 55032 standard. CISPR 32 and EN 55032 standards categorize devices into two classes: A and B. Class B equipment is intended for domestic environments. Hence, its permitted EMI emissions are significantly lower than those of A-class devices.

Our equipment for EMI readings:

  • Rohde & Schwarz FPC1500 (loaded with all options)
  • Tekbox TBLC08 LISN
  • Tekbox TBFL1 transient limiter
  • Tekbox EMCview software
CISPR 32 / EN55032 Limits
CISRP 32 / EN 55032 Class A Conducted EMI Limit
Frequency of Emission (MHz) Conducted Limit (dBuV)
Quasi-peak Average
0.15 – 0.50 79 66
0.50 – 30.0 73 60
CISPR 32 / EN 55032 Class B Conducted EMI Limit
Frequency of Emission (MHz) Conducted Limit (dBuV)
Quasi-peak Average
0.15 – 0.50 66 – 56 56 – 46
0.50 – 5.00 56 46
5.00 – 30.00 60 50
CISRP 32 / EN 55032 Class A 10-Meter Radiated EMI Limit
Frequency of Emission (MHz) Field Strength Limit (dBuV/m)
30 – 88 39
88 – 216 43.5
216 – 960 46.5
> 960 49.5
CISRP 32 / EN 55032 Class B 3-Meter Radiated EMI Limit
Frequency of Emission (MHz) Field Strength Limit (dBuV/m)
30 – 88 40
88 – 216 43.5
216 – 960 46.0
> 960 54.0

Please note that the ATX spec allows a 4 dB margin for conducted and radiated emissions. This means that if a PSU exceeds the limits but stays within the 4 dB margin, it meets the corresponding ATX spec requirement (8.1 Emissions).

EMI Results

The EMI emissions are in control, as you can see in the graph above.

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