Choosing among pc power supplies & cables gets tricky when two compact SFX units cost exactly the same but arrive in different stated conditions and carry different model specifications. The practical question is not which name sounds better; it is which listed configuration fits your intended build. This comparison separates the decision points so you can choose between the ST30SF and ST45SF with a clear reason.
Quick verdict
Cost does not break the tie: both units are listed at USD 65.00. The ST30SF gives you more component-specific selection cues, while the ST45SF has its own distinct model designation and condition label. Focus on the details that affect your planned setup rather than expecting the shared SFX and 80 Plus Bronze wording to settle the choice.
| Comparison point | SilverStone SST-ST30SF | Silver Stone SST-ST45SF |
|---|---|---|
| Listed price | USD 65.00 | USD 65.00 |
| Product wording | SFX Form Factor; 80Plus Bronze | SFX; 80 Plus Bronze |
| Model identifier | SST-ST30SF | SST-ST45SF |
Where each power supply wins
ST30SF wins when a black finish is part of the brief
The SST-ST30SF is identified as black, giving it a stated visual detail for shoppers who want that color in an SFX power supply. It also has a fuller set of configuration information attached to its name, which can make selection more straightforward when you are matching visible specifications to an existing plan.
ST45SF wins when its 450W designation is the target
The SST-ST45SF carries a 450W figure in its title, compared with 300W in the ST30SF title. That is a real specification difference, but it is a raw numerical comparison rather than proof that one unit is universally better. Choose this route when the 450W designation is specifically the figure you intend to use in your component plan.
Product notes
SilverStone SST-ST30SF
Choose the SilverStone SST-ST30SF when connection formats drive the decision. It explicitly names 20-pin, 20+4-pin, 24-pin, and 8-pin 12V connectors, and it also identifies one fan. That specificity gives you concrete configuration points to match against your intended setup instead of relying only on a model name. Its limitation is the open-box condition, rather than a new-condition claim. The black color is another listed visual detail, but the main reason to lean toward this unit is the clearly stated connector lineup. It suits a purchase decision anchored to named connection and cooling details.
Silver Stone SST-ST45SF
The Silver Stone SST-ST45SF is the direct choice when the 450W designation is central to your search. Its title also identifies an SFX, 80 Plus Bronze power supply, keeping it in the same compact-form-factor conversation as the ST30SF. The tradeoff is its used condition: the description says it may show scratches from prior use. That makes the condition label an important part of the decision rather than a minor footnote. Pick the ST45SF when a used unit is suitable for your plan and the 450W model designation is the specification you want to follow.
Final choice by use case
Pick the SST-ST30SF for a build decision that depends on the listed connector formats and one-fan cooling detail. Pick the SST-ST45SF if you are intentionally choosing a used unit and the ST45SF model designation is the one you need. The better match comes down to whether detailed connection information or the ST45SF's stated model specification matters more to your build.
