Choosing pc power supplies & cables gets confusing when a $9.90 specialty lead sits beside $65 to $70 complete units. The first decision is not wattage or condition: do you need a full power supply, or a specific dual PCIe-to-CPU cable? Making that split first prevents a connector lead from being treated as a replacement for the central power unit in a build.
Quick take
Three entries here are complete power supplies, while the Dual PCIe 8Pin to CPU 8Pin Power Cable is a separate cable purchase. Condition is an immediate divider among the full units: the EVGA SuperNOVA 450 GM is new, the SilverStone SST-ST30SF is open box, and the Silver Stone SST-ST45SF is used with scratches noted. For cable-management-focused builds, the EVGA is the differentiated choice because it is identified as fully modular. The two SilverStone models instead offer different stated outputs and purchase conditions.
Listed price comparison
| Item | Listed price | Relative listed-price bar |
|---|---|---|
| SilverStone SST-ST30SF | USD 65.00 | |
| Silver Stone SST-ST45SF | USD 65.00 | |
| EVGA SuperNOVA 450 GM | USD 70.00 | |
| Dual PCIe 8Pin to CPU 8Pin Cable | USD 9.90 |
The full power supplies occupy a narrow $5 span, so their listed distinctions matter more than price alone. The standalone cable sits in a separate purchase category and creates a $60.10 gap from the highest listed price.
Decision matrix
- Flexible cable-layout priority: Choose the EVGA SuperNOVA 450 GM, identified as a fully modular unit.
- Need a named mix of motherboard and power connectors: Choose the SilverStone SST-ST30SF, which names 20-pin, 20+4-pin, 24-pin, and 8-pin 12V connections.
- Seeking the SST-ST45SF model and its stated 450W output: Choose the Silver Stone SST-ST45SF when its used condition fits the plan.
- Working with the NVIDIA Tesla K80, P40, or P100 use case named in the title: Choose the Dual PCIe 8Pin to CPU 8Pin Power Cable.
Product notes
SilverStone SST-ST30SF
Pick the SilverStone SST-ST30SF when an open-box power supply with a stated 300W output suits the purchase. It has the detailed connection description of the two SilverStone entries: 20-pin, 20+4-pin, 24-pin, and 8-pin 12V are named, along with one fan for cooling. That makes it a more specific choice than the SST-ST45SF when those connector types matter to your plan. Its limitation is the open-box condition, so its case rests on the stated power output and connections rather than a sealed-new designation.
Silver Stone SST-ST45SF
The Silver Stone SST-ST45SF makes sense for a shopper looking specifically for a 450W SFX 80 Plus Bronze power supply at USD 65.00. Its listed price matches the SilverStone SST-ST30SF, placing the decision on the stated model, output, and condition rather than cost. The clear trade-off is its used condition, with scratches noted from prior use. Choose it when a used SST-ST45SF is the intended item; pass when that condition does not fit your build plan. It is a focused choice for that named model rather than a cable-management-led selection.
EVGA SuperNOVA 450 GM
Choose the EVGA SuperNOVA 450 GM when fully modular cabling is central to your PC cable management plan. Its named connections include 24-pin, 4+4 CPU, 6+2 PCI Express, SATA, and 4-pin peripheral formats, and the unit is marked new. At USD 70.00, it carries the highest listed price in this group, which is the concrete trade-off for selecting this particular configuration. It is the clearest fit for a builder who wants a modular power-supply choice rather than a separately sold connection lead.
Dual PCIe 8Pin to CPU 8Pin Power Cable
The Dual PCIe 8Pin to CPU 8Pin Power Cable serves a much narrower task than selecting a complete unit. Its title names NVIDIA Tesla K80, P40, and P100 and specifies a 12.5CM cable. At USD 9.90, it is separated from the highest listed price by $60.10, reflecting its role as a standalone lead rather than a power supply. Choose it for the named dual-PCIe-to-CPU connection use case. Its limitation is straightforward: it is a cable purchase, so it does not fill the role of a complete power supply.
Final recommendation by use case
For a build centered on flexible cable layout, choose the EVGA SuperNOVA 450 GM. Pick the SilverStone SST-ST30SF when its named connector grouping is the deciding detail. The Silver Stone SST-ST45SF is the targeted choice when that model and its stated 450W output matter most. For the dedicated dual-PCIe-to-CPU task named for Tesla K80, P40, and P100, choose the specialized cable instead of a complete unit.
