NZXT PC Power Supplies: 6 Picks Ranked by Specs

Quick picks

Our 6 picks

1 Best overall

NZXT 12VHPWR to Dual 8-Pin PCIe Adapter Cable

Best for: NZXT ATX 2.X PSU owners with NVIDIA 40 Series GPUs

Form Factor

ATX

Weight

6 ounces

View on Amazon: NZXT 12VHPWR to Dual 8-Pin PCIe Adapter Cable Affiliate link

This adapter lets you power NVIDIA 40 Series GPUs using older ATX 2.X power supplies. It converts a single 12+4-pin 12VHPWR connector into dual 8-pin PCIe connectors. The unit handles up to 600 watts of power delivery. It replaces the bulky standard adapters included with newer graphics cards. You get a more compact cable solution that fits inside your PC case.

Pros

• Supports 600W power delivery for high-end GPUs
• Converts 12VHPWR to dual 8-pin PCIe
• Compatible with existing NZXT ATX 2.X PSUs
• Compact design replaces bulky standard adapters

Cons

• Only works with NZXT C-Series Gold ATX 2.X PSUs
• Requires an existing 12VHPWR port on the GPU
• Does not support ATX 3.0 native connections

Good fit if

• You have an NZXT C-Series Gold ATX 2.X power supply
• You want to use an NVIDIA 40 Series GPU
• You need a compact cable solution for your build

Skip if

• You use a non-NZXT power supply
• Your GPU lacks a 12VHPWR connector
• You prefer native ATX 3.0 compatibility

Verdict: NZXT 12VHPWR Adapter Cable provides a clean upgrade path for owners of older NZXT power supplies who want to use modern NVIDIA graphics cards. It is a practical accessory for builders who already own compatible hardware.

2 Also great

NZXT C1000 1000W Gold Fully Modular PSU

Best for: Gaming builds with high-end GPUs

Wattage

1000W

Efficiency Rating

80 Plus Gold

Modularity

Fully Modular

Form Factor

ATX

Recommended Use

Gaming

Dimensions

4 × 4 × 6 inches

View on Amazon: NZXT C1000 1000W Gold Fully Modular PSU Affiliate link

The NZXT C1000 is a 1000W fully modular power supply with 80 Plus Gold certification. It features black sleeved cables and a matte black finish for clean builds. The unit includes micro controller protection to monitor current, voltage, and wattage. It is designed for gaming PCs and fits most ATX cases. This model supports NVIDIA and AMD GPUs up to the 30 and 6000 series.

Pros

• 1000W output capacity
• 80 Plus Gold efficiency rating
• Fully modular cable management
• Black sleeved cables included
• Micro controller protection system

Cons

• Lacks ATX 3.1 certification found in competitors
• No native 12VHPWR connector support
• Heavier build at 7.47 pounds

Good fit if

• You need 1000W for high-end GPUs
• You prefer black sleeved cables
• You want modular cable management

Skip if

• You require ATX 3.1 compliance
• You need a 12VHPWR cable
• You want a lighter unit

Verdict: NZXT C1000 1000W Gold PSU offers solid power and clean aesthetics for gamers who do not need the latest ATX 3.1 standards.

3 Best budget

NZXT C850 Gold ATX 3.1 850W

Best for: RTX 40 Series builds needing 850W

Wattage

850W

Efficiency Rating

80 PLUS Gold, Cybenetics Gold

Modularity

Fully Modular

ATX Version

ATX 3.1

PCIe Connector Type

12V-2x6

Fan Size

135mm

View on Amazon: NZXT C850 Gold ATX 3.1 850W Affiliate link

The NZXT C850 Gold ATX 3.1 delivers 850 watts of stable power for high-performance builds. It features an ATX 3.1 standard and a 12V-2x6 connector for RTX 40 Series cards. The unit includes a 135mm fan with zero fan mode for silent operation under light loads. It holds 80 PLUS Gold and Cybenetics Gold efficiency certifications. This fully modular power supply uses premium Japanese capacitors for reliable power delivery.

Pros

• ATX 3.1 standard for power spike resistance
• 12V-2x6 connector supports up to 600 watts
• 135mm fan with zero fan mode under 50% load
• 80 PLUS Gold and Cybenetics Gold efficiency
• Fully modular design with premium Japanese capacitors

Cons

• Lower wattage than the 1000W and 1200W options on this list
• Heavier build at 7.67 pounds compared to lighter units
• No mention of app control or software monitoring features

Good fit if

• You need 850 watts for an RTX 40 Series GPU
• You prefer silent operation during light computing tasks
• You want ATX 3.1 compatibility with modular cabling

Skip if

• You require more than 850 watts of power
• You need a black color option for this specific model
• You want a lighter power supply for small cases

Verdict: NZXT C850 Gold ATX 3.1 850W suits builders who need reliable 850-watt output with silent operation. It fits systems using RTX 40 Series cards where ATX 3.1 compliance is important.

4 Best premium

NZXT C1000 Gold v2 Black 1000W

Best for: High-end gaming PCs needing 1000W

Wattage

1000W

Efficiency Rating

80PLUS Gold

Modularity

fully modular

ATX Version

ATX3.1

Fan Size

135mm

View on Amazon: NZXT C1000 Gold v2 Black 1000W Affiliate link

This NZXT C1000 Gold v2 delivers 1000W of power with ATX 3.1 compatibility and 80PLUS Gold efficiency. It uses Japanese capacitors for stability and features a 135mm fan that stays quiet under light loads. The fully modular design helps manage cables. It suits users needing high wattage and modern connector support for their builds.

Pros

• 1000W output capacity
• ATX 3.1 compatibility
• 80PLUS Gold efficiency rating
• 135mm fan with quiet operation under 50% load
• Fully modular cable management

Cons

• Black color option only
• No mention of digital display or app control
• Japanese model variant may have different included cables

Good fit if

• You need a high-wattage power supply for a high-end GPU
• You want 80PLUS Gold efficiency for better power conversion
• You prefer fully modular cables for cleaner builds

Skip if

• You require a Platinum efficiency rating
• You need multiple color options for your case
• You want a unit with a built-in display

Verdict: NZXT C1000 Gold v2 1000W is a solid choice for builders who need reliable 1000W output with modern ATX 3.1 support and efficient power delivery.

5 Also great

NZXT C750 Gold Core 750W ATX 3.1

Best for: mid-range gaming builds

Wattage

750W

Efficiency Rating

80 PLUS Gold, Cybenetics Platinum

Modularity

Fully Modular

ATX Version

ATX 3.1

PCIe Connector Type

12V-2x6, 8-pin PCIe

Fan Size

135mm

View on Amazon: NZXT C750 Gold Core 750W ATX 3.1 Affiliate link

The NZXT C750 Gold Core delivers 750W of power with ATX 3.1 certification. It features an 80 PLUS Gold efficiency rating and Cybenetics Platinum certification. A 135 mm fan supports Zero RPM mode for silent operation. This unit includes a 12V-2x6 connector for modern GPUs. It suits builders needing efficient, quiet power for mid-range systems.

Pros

• ATX 3.1 certified for next-gen GPU compatibility
• 135 mm fan with Zero RPM mode
• Cybenetics Platinum efficiency rating
• Includes 12V-2x6 PCIe connector

Cons

• Lower 750W output than other options
• Heavier at 3.53 pounds
• Slightly larger dimensions than compact units

Good fit if

• You need a quiet, efficient power supply
• You are building a mid-range gaming PC
• You want ATX 3.1 compatibility

Skip if

• You require more than 750W of power
• You need the highest wattage available
• You prefer a lighter, smaller form factor

Verdict: NZXT C750 Gold Core 750W is a solid choice for builders prioritizing efficiency and silence over maximum wattage. It fits well in systems that do not demand extreme power reserves.

6 Best 12v-2x6 connector

NZXT C1200 Gold ATX 3.1 Power Supply

Best for: extreme gaming builds with RTX 40 series

Wattage

1200 Watts

Efficiency Rating

80 PLUS Gold

Modularity

Fully Modular

ATX Version

ATX 3.1

PCIe Connector Type

12V-2x6

Fan Size

135 mm

View on Amazon: NZXT C1200 Gold ATX 3.1 Power Supply Affiliate link

This 1200-watt power supply delivers stable energy for high-performance builds. It features the 12V-2x6 connector, supporting up to 600 watts for NVIDIA GeForce RTX 40 series cards. The unit includes a 135 mm fan that remains silent under 50% load. Japanese capacitors ensure stable power with reduced ripple noise. It is fully modular and meets ATX 3.1 standards for modern gaming rigs.

Pros

• 1200-watt capacity for high-end components
• 12V-2x6 connector supports 600 watts for RTX 40 series
• 135 mm fan with zero ventilation mode under 50% load
• Fully modular design with ATX 3.1 compliance

Cons

• Heavier at 8.11 pounds compared to lower wattage models
• Larger dimensions at 6.3 inches long may not fit small cases
• Premium price point for 1200-watt capacity

Good fit if

• You need 1200 watts for extreme gaming builds
• You want silent operation under moderate loads
• You use NVIDIA GeForce RTX 40 series graphics cards

Skip if

• You require a smaller form factor like SFX
• You only need 850 watts or less
• You prefer a non-modular power supply

Verdict: NZXT C1200 Gold ATX 3.1 fits users building extreme gaming rigs with RTX 40 series cards who need maximum power and silence. It is ideal for large cases where weight and size are not constraints.

Specifications side by side

NZXT PC Power Supply Lineup Overview

NZXT offers modular units like the C1000 and C1200 for gamers needing high wattage and ATX 3.1 compliance. These fully modular designs suit builders prioritizing clean cable management and efficiency. The C1200 Gold specifically features a 12V-2x6 connector for extreme gaming rigs.

For budget-conscious shoppers, the C850 Gold ATX 3.1 provides reliable 850-watt output in a compact form factor. The C750 Gold Core balances efficiency and silence for mid-range systems. Existing NZXT ATX 2.X owners can use the 12VHPWR adapter cable to upgrade their setup for modern NVIDIA graphics cards without replacing the entire unit.

Who NZXT Power Supplies Suit

NZXT covers the mid-to-high power range with units from 750W to 1200W. You find fully modular designs in black, white, and multicolour options. The lineup includes standard ATX and ATX 3.1 form factors. You get efficient Gold-rated units for gaming builds. The range lacks lower wattage options under 750W. There are no non-modular or semi-modular models listed. You do not see Platinum efficiency ratings in this specific selection. The adapter cable supports older ATX 2.X systems. You should check if your case fits the standard ATX dimensions provided for these larger units.

How to choose the right one

1. Match ATX standards

   Check the ATX version listed in the specs. Newer NVIDIA GPUs require specific power delivery standards. The NZXT C850 and C1000 Gold v2 both support ATX 3.1. This ensures compatibility with modern graphics cards. Older units like the original C1000 lack this version. You must verify the standard matches your GPU requirements. Using an adapter is an option for older PSUs. However, native support provides a cleaner setup. Always confirm the version number before purchasing.

2. Verify wattage needs

   Select a power supply that meets your system’s peak load. The C850 offers 850W for mid-range builds. The C1200 provides 1200W for extreme gaming rigs. Higher wattage units handle transient spikes better. You should choose a unit with headroom above your estimated draw. The C1000 models sit in the middle at 1000W. Avoid undersizing your power supply. Insufficient wattage can cause instability or shutdowns. Match the spec to your CPU and GPU combination.

3. Check efficiency ratings

   Look for the 80 Plus Gold rating in the specifications. All listed NZXT units carry this certification. Higher efficiency means less wasted energy as heat. This reduces electricity costs and fan noise. Gold-rated units maintain stable voltage under load. You get better performance from a certified unit. The C750 Gold Core also holds this rating. Efficiency impacts long-term reliability and thermal output. Prioritize Gold over lower tiers for consistent power delivery.

4. Ensure modularity

   Fully modular designs allow you to connect only needed cables. The C1000 and C1200 models are fully modular. This reduces clutter inside your PC case. You improve airflow and ease of installation. Non-modular units include fixed cables that you cannot remove. Modularity helps with cable management in tight spaces. Check the modularity spec before buying. It is a key feature for clean builds. Fully modular units offer greater flexibility for custom setups.

5. Confirm connector type

   Verify the connector matches your graphics card. The C1200 includes a 12V-2x6 connector. This is the standard for newer NVIDIA cards. Older cards may need adapters like the NZXT 12VHPWR cable. Check the connector spec in the product data. Mismatched connectors require extra cables or adapters. Native connectors reduce points of failure. Ensure the PSU supports your GPU’s power input. The adapter cable is a practical solution for older units.

Frequently asked questions

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