Shopping pc power supplies & cables gets complicated when form factor, cable configuration, condition, and stated output all pull the choice in different directions. The useful shortcut here is to settle the format first, then decide whether a modular arrangement is essential, and only then narrow down the price and condition that fit your build plan.
Quick take
- The main format split is clear: the two SilverStone units and the EVGA are marked SFX, while the Segotep is marked ATX.
- Cable configuration deserves attention before comparing output markings, since the four models are not all described the same way.
- The SilverStone SST-ST30SF is the stated 300W choice; the Silver Stone SST-ST45SF and EVGA both carry 450W in their titles; the Segotep carries 650W.
- Conditions vary across New, Used, and Open box options, making condition a meaningful part of the decision rather than a footnote.
Listed price comparison
| Power supply | Listed price | Price position |
|---|---|---|
| SilverStone SST-ST30SF | USD 65.00 | |
| Silver Stone SST-ST45SF | USD 65.00 | |
| EVGA SuperNOVA 450 GM | USD 70.00 | |
| Segotep 650W ATX PSU | USD 52.99 |
Decision matrix
- Need the SST-ST30SF connector set: Choose the SilverStone SST-ST30SF when 20 Pin, 20+4 Pin, 24 Pin, and 8 Pin 12V connections match the connections named in your build plan.
- Comfortable with a Used-condition unit: The Silver Stone SST-ST45SF is the choice to make when that condition designation is intentional rather than a compromise.
- Need named PCI Express, SATA, and peripheral connections: The EVGA SuperNOVA 450 GM lists 6+2 Pin PCI Express, SATA, and 4 Pin Peripheral connectors alongside its main motherboard and CPU connections.
- Want a stated single 12V output: The Segotep 650W ATX PSU is the model here that specifically names that output arrangement.
Product notes
SilverStone SST-ST30SF SFX Form Factor 300W 80Plus Bronze Power Supply
The SilverStone SST-ST30SF is aimed at a shopper whose build plan calls specifically for an SFX form factor and a stated 300W output. The 80Plus Bronze designation and one-fan cooling setup give the configuration a clear, simple outline, while the title identifies the SST-ST30SF model directly. It makes sense when those exact format and output terms lead the search instead of a more elaborate cable arrangement. The tradeoff is condition: this unit is marked Open box rather than New. Shoppers seeking a New-condition unit or a different stated output should steer toward another match.
Silver Stone SST-ST45SF 450W SFX 80 Plus Bronze Power Supply
Silver Stone SST-ST45SF centers on a distinct combination of SFX form factor, 450W output, and 80 Plus Bronze. That makes it a direct candidate for a build plan built around those three stated terms, especially for someone looking specifically for the SST-ST45SF model. Its limitation is plainly tied to condition: the unit is marked Used and is described as having scratches from prior use. The Silver Stone SST-ST45SF fits when a Used-condition power supply with its stated format and output is acceptable; it is less suitable when a New-condition purchase is the priority.
EVGA SuperNOVA 450 GM 450W 80 Plus Gold SFX Fully Modular Power Supply
The EVGA SuperNOVA 450 GM is the direct pick for shoppers specifically seeking a fully modular configuration. Its title pairs that arrangement with 450W and 80 Plus Gold, while ECO Mode with DBB Fan and a New condition add further named details. At USD 70, it occupies the highest listed price in this comparison. That price position is the key limitation when fully modular cable configuration is not an explicit requirement. Choose the EVGA SuperNOVA 450 GM when the fully modular wording is central to the build plan rather than simply a nice-to-have.
OPEN BOX 650W Power Supply 80 Plus Gold Non-Modular ATX Gaming PC Case PSU
The OPEN BOX 650W Power Supply 80 Plus Gold Non-Modular ATX Gaming PC Case PSU provides the ATX-format route, with 650W and 80 Plus Gold named directly in its title. A single 12V output is also part of its stated configuration, giving shoppers with that raw specification another concrete selection point. It is the natural match when ATX form factor and a 650W designation are the terms guiding the search. Its limitation is equally direct: the configuration is non-modular. Open box condition is also part of the product title, so this choice is best for someone comfortable with both that condition and the stated cable arrangement.
Final recommendation by use case
- Fully modular SFX setup: Pick the EVGA SuperNOVA 450 GM, whose title explicitly combines those two requirements.
- Lowest listed-price route: Choose the Segotep 650W ATX PSU at USD 52.99.
- Stated 300W requirement: Select the SilverStone SST-ST30SF.
- USD 65 option with 450W and Bronze in the title: Go with the Silver Stone SST-ST45SF, provided a Used-condition unit fits the plan.
