Choosing among pc power supplies & cables starts with one important distinction: are you replacing the power supply itself, or do you need a specific cable? Three choices here are ATX power supplies, while the fourth is a Dual PCIe 8Pin to CPU 8Pin cable identified for NVIDIA TESLA K80, P40, and P100. Once you separate those jobs, the main PSU decision is between a non-modular layout and full-modular designs, along with the listed 650W, 850W, and 1000W capacities.
Quick take
Pick the open-box Segotep unit when a complete ATX PSU with 80 Plus Gold efficiency is the priority and an open-box condition suits your build. The Segotep 850W model is the focused choice for a full-modular unit described as ATX 3.0 and PCIe 5.0 ready, including a native 12VHPWR cable. MSI's MPG A1000G is the full-modular route for shoppers drawn to its 1000W title specification and broad connector list. The short Tesla-labelled cable belongs in a separate, cable-specific purchase decision.
Listed price comparison
| Item | Listed price | Price marker |
|---|---|---|
| Segotep open-box non-modular ATX PSU | USD 52.99 | |
| Segotep full-modular ATX 3.0 PSU | USD 99.99 | |
| MSI MPG A1000G full-modular PSU | USD 130.00 | |
| Dual PCIe 8Pin to CPU 8Pin cable | USD 9.90 |
The listed range runs from USD 9.90 for the cable to USD 130.00 for the MSI power supply. Compare the three full PSUs with one another rather than using the cable's price as a replacement-power-supply benchmark.
Decision matrix
- For an ATX power supply with a non-modular layout: choose the OPEN BOX 650W Power Supply 80 Plus Gold Non-Modular ATX Gaming PC Case PSU.
- For full modular cabling plus stated ATX 3.0 and PCIe 5.0 readiness: choose the Segotep 850W ATX 3.0 Gaming Power Supply PCIe 5.0 Full Modular 80 Plus Gold PSU.
- For a full-modular PSU with listed CPU, PCI Express, SATA, peripheral, and 24-pin connectors: choose the MPG A1000G PCIE 5.0 & ATX 3.0 Gaming Power Supply.
- For a named Dual PCIe 8Pin-to-CPU 8Pin cable purpose: choose the NVIDIA TESLA K80 P40 P100 cable.
Product notes
OPEN BOX 650W Power Supply 80 Plus Gold Non-Modular ATX Gaming PC Case PSU
This Segotep power supply makes sense for a complete ATX build that calls for an 80 Plus Gold unit with a listed 20+4-pin connector, PFC protection, and a 120mm fan. Its non-modular design is a direct fit for shoppers who do not specifically require detachable cables. The stated single 12V output also gives this entry a clearly defined power-delivery description rather than just a bare wattage label. The trade-off is the open-box condition, which sets it apart from the new-condition entries in this comparison. It is also not the choice for someone whose deciding requirement is the full-modular cable layout offered by the other two PSUs.
Segotep 850W ATX 3.0 Gaming Power Supply PCIe 5.0 Full Modular 80 Plus Gold PSU
The strongest reason to move to this Segotep model is its stated combination of ATX 3.0, PCIe 5.0, a native 12VHPWR cable, and a fully modular layout with flat black cables. Those details speak directly to a build where removable cabling and the named graphics-card cable are central to the purchase. It also carries 80 Plus Gold certification and a 120mm fan. Its limitation is straightforwardly the listed price: at USD 99.99, it sits above the USD 52.99 open-box Segotep PSU. Choose it when the newer-standard wording and native cable matter more than making the lowest-priced full-PSU choice.
MPG A1000G PCIE 5.0 & ATX 3.0 Gaming Power Supply - Full Modular - 80 Plus Gold
MSI's MPG A1000G is the pick for a shopper who wants a full-modular ATX power supply with the title's 1000W specification and a detailed connector lineup: 4+4 CPU, 6+2 PCI Express, 24-pin, SATA, and peripheral connections are all named. The description also calls out 100% Japanese 105°C capacitors and 80 Plus Gold certification, giving this model a distinct set of stated build details. Its constraint is price position: it is the highest-listed complete power supply in this group at USD 130.00. That makes it a purposeful choice for its named configuration, rather than the default answer for every ATX build.
Dual PCIe 8Pin to CPU 8Pin Power Cable for NVIDIA TESLA K80 P40 P100 (12.5CM
This is the specialist, low-cost entry for a cable-specific need rather than a complete power-supply replacement. At USD 9.90, it is described in the title as a Dual PCIe 8Pin to CPU 8Pin Power Cable and names NVIDIA TESLA K80, P40, and P100. Its short 12.5CM title specification may also be relevant when planning a compact cable run. The limitation is equally important: it is a cable, not an ATX PSU, so it should not be compared as an alternative to the Segotep or MSI power supplies. Its title is centered on the named Tesla models rather than presenting it as a general-purpose power supply.
Final recommendation by use case
- Choose the open-box Segotep 650W for a complete non-modular ATX PSU with 80 Plus Gold efficiency and a lower listed price among the three power supplies.
- Choose the Segotep 850W when ATX 3.0, PCIe 5.0, a native 12VHPWR cable, and full-modular cabling are the decisive features.
- Choose the MSI MPG A1000G when its 1000W specification and named mix of CPU, PCI Express, SATA, peripheral, and 24-pin connectors match your planned build.
- Choose the Dual PCIe 8Pin to CPU 8Pin cable only when the Tesla K80, P40, or P100-focused cable description matches the specific part you are sourcing.
