TechShelf Guide

PC Power Supplies & Cables: Choosing an SFX, ATX, or 6-to-8-Pin Converter

Separate a complete PSU purchase from a PCIe converter cable, then narrow the EVGA, Enermax, and MSI power supplies by form factor, condition, wattage labels, and the connection task at hand.

Last updated Aug 24, 2026

Choosing pc power supplies & cables starts with one essential split: are you selecting the power supply itself, or solving a particular PCIe power connection? The EVGA SuperNOVA 450 GM, Enermax MaxRevo, and MSI MPG A1000G are all power-supply choices with different stated configurations. The 6-pin to 8-pin PCI Express converter is a cable for a narrower connection task. Separating those roles first makes the rest of the decision much clearer.

Quick take

Start with the role you need, then use form factor, condition, cable arrangement, and wattage labels to narrow the three power supplies. The EVGA is the SFX-form-factor entry; the Enermax is the used modular model sold with cables; and the MSI is the new ATX model carrying PCIe 5.0 and ATX 3.0 wording. The converter cable belongs in a GPU power-connection decision rather than a complete-PSU purchase.

Listed price comparison

The power supplies occupy a much tighter part of the price range than the separate converter cable. The bars below show the relative position of each listed price within this four-item comparison.

ItemListed priceRelative listed price
EVGA SuperNOVA 450 GMUSD 70.00
Enermax MaxRevo EMR1350EWTUSD 64.89
MSI MPG A1000GUSD 130.00
PCI Express converter cableUSD 4.96

Decision matrix

  • New-condition power supply: Choose between the EVGA SuperNOVA 450 GM and MSI MPG A1000G, both marked new.
  • Modular model that names included cables: The Enermax MaxRevo is the relevant choice, with used condition clearly stated.
  • 1000W new model: The MSI MPG A1000G carries the 1000W label and has an ATX form factor.
  • Separate GPU power-connection need: The 6-pin to 8-pin PCI Express Power Converter Cable addresses a distinct task from selecting a PSU.
  • SFX designation: The EVGA SuperNOVA 450 GM is the power supply identified with the SFX form factor.

Product notes

EVGA SuperNOVA 450 GM

EVGA SuperNOVA 450 GM 450W 80 Plus Gold SFX Fully Modular Power Supply. New

The EVGA SuperNOVA 450 GM makes sense when the SFX form factor is the deciding constraint. Its fully modular layout, ECO Mode with DBB fan, and listed 24-pin, 4+4 CPU, 6+2 PCI Express, SATA, and 4-pin peripheral connectors give a shopper a clear cable-connection set to consider. The 450W and 80 Plus Gold labels further identify this unit's configuration. Its limitation is the same focused rating: 450W is a lower listed wattage than the 1000W and 1350W labels elsewhere here, without establishing which one suits a particular system. The EVGA is marked new.

Enermax MaxRevo EMR1350EWT

Enermax MaxRevo 1350W Modular PC Power Supply 80 PLUS Gold EMR1350EWT w/ Cables

Look at the Enermax MaxRevo when a modular power supply sold with cables is the priority. The EMR1350EWT model name, 1350W title wording, 80 PLUS Gold certification, and stated 115-240 VAC input outline this particular configuration. It is also described with fully modular cable connectivity and a steel / metal enclosure. Those cable-inclusion words are a concrete reason to select the Enermax for a build where cable arrangement is part of the purchase decision. The limitation is condition: this is the used entry, unlike the EVGA SuperNOVA 450 GM and MSI MPG A1000G. That distinction describes purchase status, not remaining lifespan.

MSI MPG A1000G

MPG A1000G PCIE 5.0 & ATX 3.0 Gaming Power Supply - Full Modular - 80 Plus Gold

The MSI MPG A1000G is aimed at shoppers choosing by platform labels: its title names PCIe 5.0 and ATX 3.0, while its form factor is ATX. The 1000W, 80 Plus Gold, fully modular, new-condition configuration makes it a distinctly specified alternative, and one fan is listed for cooling. Select the MSI where the PCIe 5.0 and ATX 3.0 wording is central to the purchase. Its limitation is price: at USD 130.00, it carries the highest listed price in this comparison. That price position states cost only; it does not establish a performance result.

6-pin to 8-pin PCI Express Power Converter Cable

6-pin to 8-pin PCI Express Power Converter Cable GPU Video Card PCIE PCI-E 18AWG

The 6-pin to 8-pin PCI Express Power Converter Cable is for a narrower task than the power-supply units. It specifies a 6-pin PCI Express connector on one end and an 8-pin PCI Express connector on the other, with 18AWG wiring in the title. Choose it when that exact connector conversion is the need, rather than when selecting a complete PSU. At USD 4.96, it is the lowest-priced item in the comparison. Its limitation is role: it is listed as a cable, so it does not stand in for the EVGA, Enermax, or MSI power supplies. The converter cable is marked new.

Final recommendation by use case

For an SFX-form-factor criterion, choose the EVGA SuperNOVA 450 GM. Pick the Enermax MaxRevo when the 1350W designation is your target and its modular, cable-included configuration fits the plan. The MSI MPG A1000G is the focused choice for PCIe 5.0 and ATX 3.0 wording. Finally, choose the 6-pin to 8-pin PCI Express Power Converter Cable only for the named 6-pin-to-8-pin PCI Express connection task.

Products in this article
EVGA SuperNOVA 450 GM 450W 80 Plus Gold SFX Fully Modular Power Supply. NewUSD 70.00View on eBayEnermax MaxRevo 1350W Modular PC Power Supply 80 PLUS Gold EMR1350EWT w/ CablesUSD 64.89View on eBayMPG A1000G PCIE 5.0 & ATX 3.0 Gaming Power SupplyUSD 130.00View on eBay6-pin to 8-pin PCI Express Power Converter Cable GPU Video Card PCIE PCI-E 18AWGUSD 4.96View on eBay
EVGA SuperNOVA 450 GM 450W 80 Plus Gold SFX Fully Modular Power Supply. NewUSD 70.00View on eBayEnermax MaxRevo 1350W Modular PC Power Supply 80 PLUS Gold EMR1350EWT w/ CablesUSD 64.89View on eBayMPG A1000G PCIE 5.0 & ATX 3.0 Gaming Power SupplyUSD 130.00View on eBay6-pin to 8-pin PCI Express Power Converter Cable GPU Video Card PCIE PCI-E 18AWGUSD 4.96View on eBay

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