Mkastry Corsair RM1000x Shift 1000W Alternatives: 6 Similar Picks Compared
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You are looking at mkastry corsair rm100x shift fully alternatives for the Corsair RM1000x Shift. This power supply delivers 1000W of power with full modularity and ATX 3.0 compliance. It fits high-end gaming rigs that need modern PCIe 5.0 connectors. The unit measures 5.91 by 5.08 by 7.09 inches and weighs 4.2 pounds. It carries an 80 Plus Gold efficiency rating.
You might want a different option if you need a smaller footprint or a longer warranty. The list includes seven similar picks that share key specifications with the original. All alternatives offer 1000W or close to it, full modularity, and ATX 3.0 support. Some provide better thermal performance or quieter operation. Others offer extended warranty periods. These choices are ranked by how well their specs match your needs for modern high-end builds.
Our top pick: Corsair RM1000x Shift 1000W Power Supply.
How each alternative compares
Seasonic Vertex 1000W Gold Power Supply
The Seasonic Vertex GX-1000 is significantly more compact than the Corsair RM1000x Shift. It measures 2.69 by 1.59 by 4.53 inches, compared to the Corsair’s 5.91 by 5.08 by 7.09 inches. Both units offer 1000W output, 80 Plus Gold efficiency, and ATX 3.0 compliance. The Vertex includes a 12-year warranty, which is longer than the standard warranty often associated with the Shift. If you have a small form factor case or need a shorter power supply for better airflow, this unit is a better fit. The Corsair remains a solid choice for standard ATX cases where size is less critical.
Seasonic Focus V3 1000W Gold ATX Power Supply
The Seasonic Focus V3 GX-1000W is heavier and larger than the Corsair RM1000x Shift. It weighs 6.64 pounds and measures 5.9 by 3.4 by 5.5 inches. The Corsair is lighter at 4.2 pounds and slightly taller. Both provide 1000W, 80 Plus Gold efficiency, and ATX 3.0 support. The Focus V3 includes a 10-year warranty, matching the typical coverage for the Shift. This unit is ideal for users who prioritize a proven track record in high-end builds. The Corsair offers a more compact design with its side-interface connectors. Choose the Seasonic if you prefer a traditional form factor with established reliability.
ASUS ROG Strix 1000W Gold Aura Edition
The ASUS ROG Strix 1000W Gold is larger and heavier than the Corsair RM1000x Shift. It weighs 6.6 pounds and measures 5.9 by 3.3 by 7.08 inches. The Corsair is lighter at 4.2 pounds and has a different height profile. Both units offer 1000W, 80 Plus Gold efficiency, and ATX 3.0 compliance. The ASUS includes a 10-year warranty, which is comparable to the Corsair’s coverage. The ASUS is designed for users who value silence and thermal performance in high-wattage builds. The Corsair’s side-mounted connectors save space inside the case. Pick the ASUS if acoustic quietness is your primary concern.
MSI MAG ATX 3.0 Modular Power Supply
The MSI MAG A750GL differs significantly in wattage and physical dimensions. It provides 750W output, which is lower than the Corsair’s 1000W. The MSI unit is much larger, measuring 7.9 by 3.9 by 11.8 inches, while the Corsair is compact at 5.91 by 5.08 by 7.09 inches. Both offer 80 Plus Gold efficiency and ATX 3.0 support. The MSI is suited for mid-range gaming builds that do not require 1000W. If you need the extra headroom for high-end workstations or dual GPUs, the Corsair is the better option. The MSI is a cost-effective choice for systems with lower power demands.
Corsair RM1000e 1000W ATX Power Supply
The Corsair RM1000e shares the brand and 1000W output but lacks ATX 3.0 compliance. It measures 5.51 by 3.39 by 5.91 inches, which is slightly smaller in length than the RM1000x Shift. Both are fully modular and 80 Plus Gold efficient. The RM1000x Shift includes the newer PCIe 5.0 connectors required for modern GPUs. The RM1000e is a better fit for standard ATX builds that do not need the latest connector standards. If you are building a system with older graphics cards or do not require the shift-side interface, the RM1000e is a suitable alternative. Choose the Shift for future-proofing with ATX 3.0.
GAMEMAX 1050W ARGB Fully Modular PSU
The GAMEMAX 1050W offers higher wattage than the Corsair RM1000x Shift. It provides 1050W compared to the Corsair’s 1000W. The GAMEMAX measures 5.91 by 3.35 by 6.61 inches, which is slightly shorter in length than the Corsair. Both are fully modular, 80 Plus Gold efficient, and ATX 3.0 compliant. The GAMEMAX includes ARGB lighting, which the Corsair does not. This unit is ideal for gamers who want high power and visual customization. The Corsair is a better choice for users who prefer a stealthy black design without RGB elements. The GAMEMAX provides extra wattage for extreme overclocking scenarios.
Quick picks
Our 7 picks
Corsair RM1000x Shift 1000W Power Supply
Best for: Modern high-end gaming and workstations
- Wattage
- 1000W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.0
- Dimensions
- 7.09 × 5.91 × 5.08 inches
- Weight
- 4.2 pounds
View on Amazon: Corsair RM1000x Shift 1000W Power Supply Affiliate link
This Mkastry-branded Corsair RM1000x Shift power supply delivers 1000W of power with 80 Plus Gold efficiency. It is fully modular and compliant with ATX 3.0 and PCIe 5.0 standards. The unit measures 5.91 by 5.08 by 7.09 inches and weighs 4.2 pounds. Its side-mounted modular interface helps manage cable routing. This model suits builders needing high wattage and modern connector support.
Pros
- 1000W continuous power output
- 80 Plus Gold efficiency rating
- ATX 3.0 and PCIe 5.0 compliant
- Fully modular design
- Side-mounted modular interface
Cons
- Heavier build at 4.2 pounds
- Larger dimensions than some competitors
- No mention of fan noise profile
Good fit if
- You need ATX 3.0 compatibility for new GPUs
- You want a fully modular unit for clean builds
- You require 1000W of power capacity
Skip if
- You need a lower wattage unit
- You prefer a non-modular design
- You require 80 Plus Platinum efficiency
Verdict: Mkastry Corsair RM1000x Shift 1000W fits users who need ATX 3.0 compliance and high power density in a fully modular package. It is ideal for modern high-end gaming rigs.
Seasonic Vertex 1000W Gold Power Supply
Best for: ATX 3.0 builds with modern GPUs
- Wattage
- 1000W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.0
- PCIe Connector Type
- 12VHPWR
- Fan Size
- 135mm
View on Amazon: Seasonic Vertex 1000W Gold Power Supply Affiliate link
This Seasonic power supply delivers 1000W of power with 80 Plus Gold efficiency. It supports ATX 3.0 and PCIe 5.0 standards, including the 12VHPWR connector for modern graphics cards. The unit features a 135mm fan with hybrid silent control for quiet operation. You get full modularity for clean cable management and a 12-year warranty. It suits users needing reliable, high-wattage performance for new systems.
Pros
- 1000W output with 80 Plus Gold efficiency
- ATX 3.0 and PCIe 5.0 ready with 12VHPWR cable
- Fully modular design for easy cable management
- 135mm fan with hybrid silent fan control
- 12-year warranty coverage
Cons
- 80+ Gold rating is lower than Platinum options
- 1000W capacity may exceed needs for low-power builds
- Heavier build at 4.34 pounds
Good fit if
- You are building an ATX 3.0 system with PCIe 5.0 GPUs
- You need full modularity for clean cable routing
- You want a 12-year warranty for long-term reliability
Skip if
- You require 80 Plus Platinum efficiency
- You need more than 1000W of power
- You prefer a lighter power supply under 4 pounds
Verdict: Seasonic Vertex GX 1000W Gold is a solid choice for builders needing ATX 3.0 compatibility and a 12-year warranty. It fits users who prioritize efficiency and quiet operation over Platinum certification.
Seasonic Focus V3 1000W Gold ATX Power Supply
Best for: high-end gaming and workstation builds
- Wattage
- 1000W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Full-Modular
- ATX Version
- ATX 3.0
- PCIe Connector Type
- 12VHPWR
- Fan Size
- 135 mm
View on Amazon: Seasonic Focus V3 1000W Gold ATX Power Supply Affiliate link
The Seasonic Focus V3 GX-1000W is a fully modular 1000W power supply with 80 PLUS Gold efficiency. It supports ATX 3.0 and includes a 12VHPWR connector for PCIe 5.0 GPUs. The unit features a 135 mm fan and measures 5.5 by 5.9 by 3.4 inches. It carries a 10-year warranty. This model suits builders needing reliable high-wattage performance with modern cable standards.
Pros
- 1000W output capacity
- 80 PLUS Gold efficiency rating
- ATX 3.0 and PCIe 5.0 ready with 12VHPWR connector
- 135 mm fluid dynamic bearing fan
- 10-year warranty coverage
Cons
- 1000W capacity may be excessive for low-power builds
- Fully modular design requires managing separate cables
- No mention of smart monitoring software support
Good fit if
- You are building a high-end PC with an RTX 4090 or similar GPU
- You need a 1000W unit with native PCIe 5.0 support
- You prefer a 10-year warranty for long-term peace of mind
Skip if
- You require a power supply under 850W
- You want a non-modular unit for simpler installation
- You need 80 PLUS Platinum efficiency for maximum savings
Verdict: Seasonic Focus V3 GX-1000W Gold is a solid choice for enthusiasts building high-performance systems with modern graphics cards. It delivers reliable power and modern connectivity with a strong warranty backing.
ASUS ROG Strix 1000W Gold Aura Edition
Best for: High-wattage builds needing silence and warranty
- Wattage
- 1000W
- Efficiency Rating
- 80+ Gold Certified
- Modularity
- Fully Modular
- ATX Version
- ATX 3.0
- Warranty
- 10-Year
- Dimensions
- 7.08 × 5.9 × 3.3 inches
View on Amazon: ASUS ROG Strix 1000W Gold Aura Edition Affiliate link
The ASUS ROG Strix 1000W Gold is a fully modular ATX 3.0 power supply designed for high-performance builds. It features 80 Plus Gold efficiency and a 10-year warranty. Large ROG heatsinks and an aluminum case help reduce temperatures and noise. The axial-tech fan includes 0dB Technology for silence during light gaming. It suits users who need reliable power delivery with thermal management.
Pros
- 1000W output capacity
- 80 Plus Gold efficiency rating
- ATX 3.0 standard support
- 10-year warranty coverage
- 0dB fan technology for silence
Cons
- Heavier build at 6.6 pounds
- Larger dimensions than standard units
- No mention of app control
Good fit if
- You need 1000W for high-end GPUs
- You want a 10-year warranty
- You prefer silent operation at low loads
Skip if
- You need a compact SFX unit
- You want a budget 80 Plus Bronze option
- You prefer a lighter power supply
Verdict: ASUS ROG Strix 1000W Gold offers strong thermal performance and a long warranty for users building high-wattage ATX 3.0 systems who value silence and durability.
MSI MAG ATX 3.0 Modular Power Supply
Best for: RTX 40 series gaming builds
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Full Modular
- ATX Version
- ATX 3.0
- PCIe Connector Type
- PCIe 5.0
- Fan Size
- 120mm
- Recommended Use
- Gaming
View on Amazon: MSI MAG ATX 3.0 Modular Power Supply Affiliate link
This MSI MAG A750GL is a 750W power supply built for modern gaming rigs. It carries an 80 Plus Gold efficiency rating and supports ATX 3.0 standards. The unit includes a native PCIe 5.0 connector, making it ready for NVIDIA GeForce RTX 40 Series graphics cards. You get full modularity to manage cables cleanly. The 120mm fan uses a fluid dynamic bearing for steady operation. This model suits users who need reliable power for high-end GPUs without excess wattage.
Pros
- 80 Plus Gold certified efficiency
- Native PCIe 5.0 connector included
- ATX 3.0 compatible design
- Full modular cable management
- 120mm fluid dynamic bearing fan
Cons
- 750W output is lower than the 1000W+ options on this list
- Sold as a renewed product rather than new
- 120mm fan is smaller than the 135mm or 140mm fans found in higher-end units
Good fit if
- You are building a system with an RTX 40 series GPU
- You need ATX 3.0 compatibility for future-proofing
- You want full modularity to keep your case tidy
Skip if
- You require more than 750W of power for extreme overclocking
- You prefer a brand-new unit over a renewed one
- You need a larger 135mm fan for quieter operation
Verdict: MSI MAG A750GL 750W Gold PSU is a solid mid-range option for gamers who need PCIe 5.0 support. It fits users who prioritize efficiency and modern connectors over raw wattage.
Corsair RM1000e 1000W ATX Power Supply
Best for: Standard ATX builds needing 1000W modular power
- Wattage
- 1000 Watt
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Fully Modular
- Form Factor
- ATX
- Size
- 1000W
- Dimensions
- 5.91 × 5.51 × 3.39 inches
View on Amazon: Corsair RM1000e 1000W ATX Power Supply Affiliate link
The Corsair RM1000e is a 1000W fully modular power supply with 80 PLUS Gold efficiency. It measures 5.91 by 5.51 by 3.39 inches and weighs 3.66 pounds. The unit features dual EPS12V connectors and low-noise operation. It suits builders who need reliable high-wattage output in a standard ATX form factor without excessive bulk.
Pros
- 1000W output capacity
- Fully modular cable design
- 80 PLUS Gold efficiency rating
- Dual EPS12V connectors included
Cons
- Heavier than some competitors at 3.66 pounds
- Lacks ATX 3.0 or PCIe 5.0 native support
- No mention of advanced noise control modes
Good fit if
- You need a high-wattage 80 PLUS Gold unit
- You prefer fully modular cables for clean builds
- You require dual EPS12V connectors for high-end CPUs
Skip if
- You need ATX 3.0 compatibility for new GPUs
- You want the lightest possible power supply
- You require PCIe 5.0 native support
Verdict: Corsair RM1000e 1000W Fully Modular is a solid choice for standard ATX builds needing high wattage and modular flexibility, though it lacks modern PCIe 5.0 features.
GAMEMAX 1050W ARGB Fully Modular PSU
Best for: Gamers wanting high wattage and RGB
- Wattage
- 1050W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.0
- PCIe Connector Type
- 12VHPWR 16pin
- Fan Size
- 140mm
View on Amazon: GAMEMAX 1050W ARGB Fully Modular PSU Affiliate link
The GAMEMAX 1050W is a fully modular power supply with 80 Plus Gold efficiency. It supports ATX 3.0 and includes a 12VHPWR connector for modern GPUs. The unit features a 140mm fan and addressable RGB lighting. You get stable output via DC-DC structure. It suits gamers who want high wattage and customizable lighting in a standard ATX form factor.
Pros
- 1050W output capacity
- 80 Plus Gold efficiency rating
- ATX 3.0 and PCIe 5.0 ready
- Includes 12VHPWR 16pin connector
- 140mm hydraulic bearing fan
Cons
- ARGB lighting may not suit minimal builds
- Brand is less established than Corsair or Seasonic
- No mention of zero-RPM fan mode
Good fit if
- You need 1050W for high-end GPUs
- You want ATX 3.0 compatibility
- You prefer customizable RGB lighting
Skip if
- You require a known premium brand
- You need silent operation without fans
- You prefer non-RGB aesthetics
Verdict: GAMEMAX 1050W ATX 3.0 ARGB PSU offers solid specs for gamers needing high power and lighting customization. It fits users who value modern connector support over brand prestige.
Specifications side by side
| Spec | Corsair RM1000x Shift 1000W Power Supply | Seasonic Vertex 1000W Gold Power Supply | Seasonic Focus V3 1000W Gold ATX Power Supply | ASUS ROG Strix 1000W Gold Aura Edition | MSI MAG ATX 3.0 Modular Power Supply | Corsair RM1000e 1000W ATX Power Supply | GAMEMAX 1050W ARGB Fully Modular PSU |
|---|---|---|---|---|---|---|---|
| Wattage | 1000W | 1000W | 1000W | 1000W | not specified | 1000 Watt | 1050W |
| Efficiency Rating | 80 Plus Gold | 80+ Gold | 80 PLUS Gold | 80+ Gold Certified | 80 Plus Gold | 80 PLUS Gold | 80 Plus Gold |
| Modularity | Fully Modular | Fully Modular | Full-Modular | Fully Modular | Full Modular | Fully Modular | Fully Modular |
| ATX Version | ATX 3.0 | ATX 3.0 | ATX 3.0 | ATX 3.0 | ATX 3.0 | not specified | ATX 3.0 |
| PCIe Connector Type | not specified | 12VHPWR | 12VHPWR | not specified | PCIe 5.0 | not specified | 12VHPWR 16pin |
| Fan Size | not specified | 135mm | 135 mm | not specified | 120mm | not specified | 140mm |
| Warranty | not specified | 12 Year | 10 Year | 10-Year | not specified | not specified | not specified |
| Form Factor | ATX | ATX | ATX | ATX | ATX | ATX | ATX |
| Recommended Use | not specified | not specified | not specified | not specified | Gaming | not specified | Gaming |
| Size | 1000W | 1000W | 1000W | 1000W | not specified | 1000W | ARGB PRO SERIES |
| Dimensions | 7.09 × 5.91 × 5.08 inches | 4.53 × 2.69 × 1.59 inches | 5.5 × 5.9 × 3.4 inches | 7.08 × 5.9 × 3.3 inches | 11.8 × 7.9 × 3.9 inches | 5.91 × 5.51 × 3.39 inches | 6.61 × 5.91 × 3.35 inches |
| Weight | 4.2 pounds | 4.34 pounds | 6.64 pounds | 6.6 pounds | 3.97 pounds | 3.66 pounds | 3.53 pounds |
| Color | Black | not specified | not specified | not specified | not specified | Black | not specified |
| Model | not specified | VERTEX GX-1000 | ATX3-FOCUS-GX-1000 | ROG-STRIX-1000G-AURA-GAMING | not specified | not specified | GMX-RGB-1050PRO |
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Frequently asked questions
Is the Corsair RM1000x Shift ATX 3.0 compatible?
Yes, the Corsair RM1000x Shift is fully ATX 3.0 compliant. This standard ensures it includes the necessary PCIe 5.0 connectors for modern graphics cards. The unit provides 1000W of power in a fully modular design, making it suitable for high-end gaming systems that require reliable and up-to-date power delivery.
How does the Seasonic Vertex size compare to the Corsair RM1000x Shift?
The Seasonic Vertex GX-1000 is significantly more compact than the Corsair RM1000x Shift. It measures 2.69 by 1.59 by 4.53 inches, whereas the Corsair unit measures 5.91 by 5.08 by 7.09 inches. Both offer 1000W output and 80 Plus Gold efficiency, but the Seasonic model saves space in smaller cases.
Does the MSI MAG ATX 3.0 offer 1000W of power?
No, the MSI MAG ATX 3.0 Modular Power Supply is listed as a 750W unit. While it supports ATX 3.0 standards and is recommended for RTX 40 series gaming builds, it does not provide the 1000W output found in the Corsair RM1000x Shift or other 1000W alternatives on this list.
Can the GAMEMAX 1050W PSU support ATX 3.0 builds?
Yes, the GAMEMAX 1050W ARGB Fully Modular PSU supports ATX 3.0. It offers 1050W of power, which exceeds the 1000W output of the Corsair RM1000x Shift. This model is designed for gamers who want high wattage and lighting customization, fitting well into modern high-performance gaming rigs.
Is the Corsair RM1000e ATX 3.0 compliant?
No, the Corsair RM1000e 1000W Fully Modular power supply lacks ATX 3.0 compliance. While it provides 1000W of power and full modularity for standard ATX builds, it does not include the modern PCIe 5.0 features found in the RM1000x Shift or other ATX 3.0 alternatives like the Seasonic Vertex.
Which alternative is the most compact 1000W option?
The Seasonic Vertex GX-1000 is the most compact 1000W option listed. Its dimensions are 2.69 by 1.59 by 4.53 inches, which is much smaller than the Corsair RM1000x Shift at 5.91 by 5.08 by 7.09 inches. It maintains 80 Plus Gold efficiency and fully modular cabling in a significantly reduced form factor.