Choosing among pc power supplies & cables starts with one question: does the build need an SFX power supply, or does it already have a power supply and need sleeved extensions for cable routing? That distinction separates the three power units here from the black-and-purple extension kit immediately. From there, condition, modular construction, connector names, and the stated wattage are more useful decision points than trying to treat one number as automatically better than another.
Quick take
The SilverStone SST-ST30SF, Silver Stone SST-ST45SF, and EVGA SuperNOVA 450 GM are all SFX-form-factor power supplies with different stated specifications and conditions. The PSU Cable Extension Kit is instead a cable-management accessory that plugs into factory PSU cables. Choose the EVGA when fully modular construction and a new condition are priorities. Choose either SilverStone when its particular wattage, Bronze designation, and condition suit the build plan. Select the extension kit when the goal is a sleeved, comb-supported cable presentation rather than power delivery.
Listed-price comparison
| Model | Listed price | Price position |
|---|---|---|
| SilverStone SST-ST30SF | USD 65.00 | |
| Silver Stone SST-ST45SF | USD 65.00 | |
| EVGA SuperNOVA 450 GM | USD 70.00 | |
| Sleeved PSU Cable Extension Kit | USD 39.67 |
Decision matrix
- Choose the SilverStone SST-ST30SF for an SFX unit with a stated 300 W maximum and 80Plus Bronze designation. Its open-box condition is the tradeoff to weigh.
- Choose the Silver Stone SST-ST45SF when the title's 450 W, SFX, and 80 Plus Bronze combination fits the requirements. The used condition is its key limitation.
- Choose the EVGA SuperNOVA 450 GM when fully modular construction and an SFX form factor are central to the purchase. Its connector list is more expansive than the details stated for the two SilverStone entries.
- Choose the Sleeved PSU Cable Extension Kit for cable routing and a uniform sleeved look with included cable combs. It attaches to factory PSU cables rather than directly to a power supply.
Product notes
SilverStone SST-ST30SF
The SilverStone SST-ST30SF suits a build list that specifically calls for an SFX power supply with a listed 300 W maximum and an 80Plus Bronze label. Its named connections include 20 Pin, 20+4 Pin, 24 Pin, and 8 Pin 12V, and it lists one fan for cooling. That makes the appeal quite specific: select it when those connector names and the stated power figure fit the intended component list. The practical limitation is its open-box condition. Shoppers seeking a new-condition unit within this group have a different route in the EVGA SuperNOVA 450 GM.
Silver Stone SST-ST45SF
The Silver Stone SST-ST45SF is the straightforward choice for someone looking at a listed 450 W SFX power supply carrying an 80 Plus Bronze designation. The model title provides a clear wattage-and-format pairing without turning that wattage into a claim of greater performance than the other entries. Its limitation is condition: this unit is used. That condition is the deciding qualifier for shoppers comparing the two SilverStone models, since both share the same listed price. Pick the SST-ST45SF when its stated 450 W SFX configuration is the target and a used unit fits the purchase criteria.
EVGA SuperNOVA 450 GM
The EVGA SuperNOVA 450 GM is the choice centered on fully modular construction. It is a new 450W, 80 Plus Gold, SFX power supply with a connector list covering 24 Pin, 4+4 CPU, 6+2 Pin PCI Express, SATA, and 4 Pin Peripheral connections. That breadth gives shoppers looking for those named connector types a concrete reason to focus on this model. The listed USD 70.00 price is the highest in this comparison, which is its clear cost limitation. The decision here is about the modular design, named connections, and new condition rather than an assumption that any one technical number is inherently superior.
Sleeved PSU Cable Extension Kit
The Sleeved PSU Cable Extension Kit serves a different job from the power supplies: it is a PSU cable extension set for routing and presentation. The black-and-purple kit includes a 24 Pin ATX extension, a 4+4 Pin EPS cable, PCI-e extensions, cable combs, and 300 mm cable lengths. Choose it when factory PSU leads need an added sleeved layer and combs for a more uniform layout. Its key limitation is functional: the extensions connect into factory PSU cables and cannot connect directly to the PSU. That makes it an accessory for an existing setup, not a replacement power unit.
Final recommendation by use case
- For a 300 W selection with named 20 Pin and 8 Pin 12V connections: choose the SilverStone SST-ST30SF.
- For the USD 65.00 Silver Stone SST-ST45SF: choose it when a used-condition unit is acceptable.
- For a new-condition modular power supply: choose the EVGA SuperNOVA 450 GM.
- For a black-and-purple sleeved cable finish: choose the PSU Cable Extension Kit.
