Choosing pc power supplies & cables means balancing more than a wattage number. The immediate decision is whether you want a non-modular ATX layout at the lowest listed price, a full-modular ATX 3.0 and PCIe 5.0 design, or an SFX-format unit. The listed prices span $77.01 from the lowest to highest entry, while condition ranges from open box and used to new.
Quick take
The OPEN BOX 650W Power Supply is the low-price ATX choice for shoppers comfortable with a non-modular design. Segotep's 850W model is the direct full-modular pick with ATX 3.0, PCIe 5.0, and a native 12VHPWR cable called out. MSI's MPG A1000G is also full modular and carries a more detailed connector list. Silver Stone's SST-ST45SF stands apart as the SFX-format choice, with used condition forming an important part of the decision.
Listed price comparison
| Power supply | Listed price | Price marker | Condition |
|---|---|---|---|
| OPEN BOX 650W Power Supply 80 Plus Gold Non-Modular ATX Gaming PC Case PSU | USD 52.99 | Open box | |
| Segotep 850W ATX 3.0 Gaming Power Supply PCIe 5.0 Full Modular 80 Plus Gold PSU | USD 99.99 | New | |
| MPG A1000G PCIE 5.0 & ATX 3.0 Gaming Power Supply - Full Modular - 80 Plus Gold | USD 130.00 | New | |
| Silver Stone SST-ST45SF 450W SFX 80 Plus Bronze Power Supply | USD 65.00 | Used |
Decision matrix
- For a lower listed-price ATX route: the open-box Segotep 650W pairs an ATX form factor with an 80 Plus Gold label, but uses a non-modular configuration.
- For full-modular cabling with ATX 3.0 and PCIe 5.0 in the title: the Segotep 850W is the focused match, including a native 12VHPWR cable in its description.
- For a full-modular unit with several connector types specifically named: MSI's MPG A1000G lists CPU, peripheral, PCI Express, 24-pin, and SATA I connections.
- For an SFX-form-factor search: the Silver Stone SST-ST45SF is the relevant choice, with a 450W rating and 80 Plus Bronze label.
Product notes
OPEN BOX 650W Power Supply 80 Plus Gold Non-Modular ATX Gaming PC Case PSU
The open-box Segotep 650W suits a shopper seeking an ATX unit identified as 80 Plus Gold who accepts a non-modular cable layout. Its description also names 20+4-pin and 6+2-pin connectors, a 120 mm fan, and a single 12V output. That makes the non-modular arrangement a clear reason to select it when the lower listed price is the priority. The limitation is condition: open box differs from the new status attached to the other two ATX entries. It also does not offer the full-modular arrangement explicitly named on the Segotep 850W and MSI MPG A1000G.
Segotep 850W ATX 3.0 Gaming Power Supply PCIe 5.0 Full Modular 80 Plus Gold PSU
The Segotep 850W makes the clearest case when ATX 3.0 and PCIe 5.0 wording is central to the build plan. Full-modular cabling and the flat black cable description give it a specific cable-management focus, while the description also calls out a native 12VHPWR cable. Select the Segotep 850W for that named combination rather than simply because of the 850W figure. The trade-off is its USD 99.99 listed price, which sits above the open-box Segotep and the used Silver Stone in the comparison. It is listed in new condition.
MPG A1000G PCIE 5.0 & ATX 3.0 Gaming Power Supply - Full Modular - 80 Plus Gold
MSI's MPG A1000G is aimed at shoppers who want a full-modular ATX option carrying PCIe 5.0 and ATX 3.0 in its title, plus a multi-type connector list. The listed connections include 4+4 CPU, 4-pin peripheral, 6+2-pin PCI Express, 24-pin, and SATA I. That clearly identified connector mix is the most concrete reason to choose the MSI entry. Its limitation is price position: at USD 130.00, it is the highest listed option here. The unit is listed as new and has an 80 Plus Gold label.
Silver Stone SST-ST45SF 450W SFX 80 Plus Bronze Power Supply
The Silver Stone SST-ST45SF is the focused selection for a shopper specifically looking for an SFX power supply. Its title supplies three useful identifiers at once: SFX format, a 450W rating, and an 80 Plus Bronze label. Choose it when that named format is more important than pursuing the full-modular ATX 3.0 route represented by the Segotep and MSI entries. The key limitation is its used condition. The description states that the unit will show scratches from prior use, making condition just as central to the decision as the SFX designation.
Final recommendation by use case
Choose the OPEN BOX 650W Power Supply for the lowest listed-price ATX path and a non-modular layout. Pick the Segotep 850W when full-modular cables, ATX 3.0, PCIe 5.0, and the named 12VHPWR cable are your decision points. Select the MPG A1000G when its explicitly listed connector types are the deciding factor. For an SFX-focused search, the Silver Stone SST-ST45SF is the format-specific option, provided its used condition fits your plan.
