Choosing pc power supplies & cables comes down to a crucial distinction: are you adding or changing a connector path, or replacing the power supply that runs the whole PC? A PCIe cable with almost the right-looking plugs can serve a very different role from a full ATX unit. Start with the connector already in your build, then match the named endpoint, model reference, or system-power requirement before letting price settle the decision.
Quick take
The four choices divide into three cable jobs and one complete power-supply job. The HUHOU cable is built around a dual 6+2-pin graphics-card layout, while the 6-pin-to-8-pin cable focuses on one specific connector conversion. The Dual PCIe 8Pin to CPU 8Pin cable is named for NVIDIA Tesla K80, P40, and P100 hardware. Segotep's open-box unit is the separate choice for a non-modular ATX power supply rather than an add-on cable.
Listed-price comparison
| Item | Listed price | Relative listed price |
|---|---|---|
| HUHOU PCIe 8 Pin Female to Dual 6+2 Male Extension Cable | USD 13.99 | |
| 6-pin to 8-pin PCI Express Power Converter Cable | USD 4.96 | |
| Dual PCIe 8Pin to CPU 8Pin Cable for NVIDIA Tesla K80, P40, P100 | USD 9.90 | |
| Segotep 650W 80 Plus Gold Non-Modular ATX PSU | USD 52.99 |
The difference between the lowest and highest listed prices is $48.03. That spread reflects the change from individual cable solutions to a complete 650W power supply, so compare like with like rather than treating all four as interchangeable parts.
Decision matrix
- Lowest listed cable cost: Choose the 6-pin to 8-pin PCI Express Power Converter Cable at USD 4.96 when price is the primary starting point.
- Female 8-pin feed to two graphics-card plugs: The HUHOU extension is the match for an 8-pin PCI Express female connection leading to dual 6+2-pin male connectors.
- Named Tesla hardware: Select the Dual PCIe 8Pin to CPU 8Pin cable when NVIDIA Tesla K80, P40, or P100 appears in the required cable specification.
- ATX system power connection: The Segotep unit is the relevant choice when the build calls for an ATX form factor and a 20+4 Pin connector, rather than a PCIe cable.
Product notes
HUHOU PCIe 8 Pin Female to Dual 6+2 Male Extension Cable
The HUHOU cable is worth choosing when a black-and-yellow cable route suits the look of a visible build and the dual 6+2-pin graphics-card arrangement is the required layout. Its title is specific about the female 8-pin PCIe start and the two male ends, making it distinct from a simple one-to-one converter. The listed price is USD 13.99, which is higher than the other two cable entries in this comparison. That is the main limitation if the needed connection is simpler. It is best treated as a targeted extension and splitter-style cable choice, not a general substitute for every PCIe connector change.
6-pin to 8-pin PCI Express Power Converter Cable
Pick the 6-pin to 8-pin PCI Express Power Converter Cable when the existing connection starts at 6-pin PCI Express and the required destination is 8-pin PCI Express. The 18AWG wording is also part of the stated cable specification, which may matter when matching a requested component description. Its limitation is its focused connector pairing: 6-pin to 8-pin is a different arrangement from the HUHOU cable's dual 6+2-pin male layout. That narrow role is useful when it matches the build exactly, but it does not replace a cable chosen for two graphics-card-side connections or a full power supply.
Dual PCIe 8Pin to CPU 8Pin Power Cable for NVIDIA Tesla K80, P40, P100
The Dual PCIe 8Pin to CPU 8Pin Power Cable is the specialized option in this group. Choose it when the 12.5CM specification in the title and its dual-PCIe-to-CPU-8Pin endpoint description match the requested cable role. At USD 9.90, it sits between the two other cable prices. The limitation is that its connector description is highly particular: dual PCIe 8Pin to CPU 8Pin is not the same path as a 6-pin-to-8-pin graphics-card converter. Its title also calls out NVIDIA Tesla K80, P40, and P100, giving this cable a more model-specific focus than the general PCIe cable entries.
OPEN BOX 650W Power Supply 80 Plus Gold Non-Modular ATX Gaming PC Case PSU
The Segotep 650W unit is the choice for a build that needs a complete power supply rather than an adapter or extension cable. Its listed 650W capacity, 80 Plus Gold efficiency designation, and 120mm fan describe a substantially different component category from the three cable-only entries. The listed price is USD 52.99. Its limitations are stated plainly: the unit is open box and non-modular. Those characteristics make it a deliberate selection for someone comfortable with that condition and cable design, rather than a direct comparison with a PCIe converter.
Final recommendation by use case
For a 6-pin-to-8-pin PCIe conversion, choose the 6-pin to 8-pin PCI Express Power Converter Cable. For an 8-pin female PCIe connection that needs dual 6+2-pin male ends, choose the HUHOU extension. The Dual PCIe 8Pin to CPU 8Pin Power Cable fits the specifically named Tesla K80, P40, and P100 use case. Choose the Segotep 650W 80 Plus Gold Non-Modular ATX PSU when the task is powering an ATX PC with a complete PSU, not adding a connector cable.
