| Product name | SeaSonic S12II Series S12II 620 Bronze (SS-620GB) | Thermaltake SMART Series SP-550PCBUS | COOLER MASTER MasterWatt Series MPX-5501-AMAAB-US |
| Popularity | 80 | 80 | 80 |
| Rating | | | |
| Shopineer score | 78 | 78 | 78 |
| Price | $64.99 |  $55.99 | $64.80 |
| Brand | SeaSonic | Thermaltake | COOLER MASTER |
| Type | Intel ATX 12 V | ATX 12V 2.3 | ATX 12V V2.4 |
| Maximum Power | 620W | 550W | 550W |
| Fans | 1 x 120mm Fluid Dyanamic Fan Bearing fan (Seasonic S2FC) | 1 | 1 x 120mm LDB Bearing Fan |
| PFC | Active | Active | Active |
| Main Connector | 24Pin | 24Pin | 24Pin |
| +12V Rails | 2 | Single | Single |
| PCI-Express Connector | 2 x 6+2-Pin | 2 x 6+2-Pin | 2 x 6+2-Pin |
| SATA Power Connector | 8 | 6 | 6 |
| SLI | | SLI Ready | |
| Haswell Support | | Yes | |
| CrossFire | | CrossFire Ready | |
| Modular | | No | Semi-Modular |
| Energy-Efficient | 80 PLUS BRONZE Certified | 80 PLUS BRONZE Certified | 80 PLUS BRONZE Certified |
| Over Voltage Protection | Yes | Yes | Yes |
| Input Voltage | 100 - 240 V | 100 - 240 V | 100 - 240 V |
| Input Frequency Range | 50/60 Hz | 47 - 63 Hz | 50/60 Hz |
| Input Current | 9 A | 8 A | 8 - 4A |
| Output | 3.3V@24A, +5V@24A, +12V1@24A, +12V2@24A, -12V@0.8A, +5VSB@2.5A | +3.3V@24A, +5V@15A, +12V@42A, -12V@0.5A, +5VSB@3.0A | +3.3V@20A, +5V@20A, +12@45.8A, -12V@0.3A, +5VSB@3A |
| MTBF | 150,000 hours | 100,000 hrs minimum | >100,000 Hours |
| Approvals | cTUVus, TUV, Gost-R, UkrTEST, CB , BSMI, Semko, CCC, CE, FCC, C-tick, Energy Star, RoHS, WEEE, REACH | UL/CUL/TUV/CE/FCC and BSMI | CCC, CE, TUV-RH, RCM, EAC, cTUVus, FCC, BSMI, KC, CB |
| Dimensions | 5.91 x 5.51 x 3.39 | 5.90 x 3.39 x 5.51 | 5.51 x 5.91 x 3.39 |
| Weight | 5 lbs. | 4.8 lbs. | 3.54 lbs. |
| Connectors | 1 x Main connector (20+4Pin)1 x 4/8-Pin ATX 12V / EPS 12V2 x PCI-E8 x SATA4 x Peripheral1 x Floppy | 1 x 24 Pin1 x CPU 4+4 Pin2 x PCI-e 6+2 Pin6 x SATA4 x 4 Pin Peripheral1 x 4 Pin Floppy | 1 x MB 24 pin1 x CPU 12V 4+4Pin6 x SATA2 x Peripheral 4 Pin1 x FDD Cable 4 Pin2 x PCI-e 6+2 Pin |
