SilverStone 500W Gold TFX Power Alternatives: 6 Similar Picks Compared
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You are looking for silverstone technology 500w fixed cable alternatives to match your specific build requirements. The original SilverStone TX500-G delivers 500W of continuous power with 80 PLUS Gold efficiency in a compact TFX form factor. It features a quiet 80mm fan and fixed cabling, making it a reliable choice for standard small form factor cases. However, you might need a different size, a modular design, or a higher wattage for your system.
This list of 6 alternatives includes options that overlap with the original’s key specifications. You will find other TFX models, compact Flex ATX units, and larger ATX supplies. Each pick shares attributes like Gold efficiency or similar wattage, ensuring they meet your core power needs. Some alternatives offer fully modular cables for cleaner builds, while others provide higher capacity for demanding GPUs. We selected these products because their published specs align with common upgrade paths or space constraints. You can compare dimensions, connector types, and efficiency ratings to find the best fit for your hardware.
Our top pick: SilverStone 500W Gold TFX Power Supply.
Comparing the top alternatives
SilverStone 500W Flex ATX Power Supply
This SilverStone Flex ATX model offers the same 80 PLUS Gold efficiency and 500W output as the original, but in a significantly smaller footprint. It measures 3.21 by 1.59 by 5.91 inches, which is much thinner than the standard TFX design. This makes it ideal for ultra-compact cases where height is restricted. You gain flexibility in case selection, but you lose the standard TFX mounting compatibility. If your chassis requires the thinner Flex ATX form factor, this is the direct upgrade path. It retains the brand’s reliability while adapting to tighter spatial constraints.
FSP FlexGURU 500W Flex ATX PSU
The FSP FlexGURU provides 500W of Gold efficiency in a Flex ATX form factor, matching the compact dimensions of the second option. It measures 1.59 by 3.21 by 5.91 inches and weighs just 2.18 pounds, making it lighter than the SilverStone FX500-G. This unit is designed for 1U servers or networking gear where space and weight matter. It shares the same efficiency rating but differs in brand ecosystem and specific industrial use cases. If you need a Gold-rated supply for a specialized small form factor build, this is a strong contender that prioritizes density and efficiency.
SilverStone 400W TFX Power Supply
This SilverStone unit drops the wattage to 400W while keeping the 80 PLUS Gold efficiency and standard TFX dimensions. It shares the same 3.4 by 2.6 by 6.9 inches size as the original TX500-G, ensuring identical case compatibility. You save space and potentially cost by reducing power output, which suits systems with lower power demands. It retains the quiet operation and fixed cabling style. If your components do not require 500W, this model offers a more efficient fit for standard TFX cases without changing the physical installation requirements or sacrificing efficiency ratings.
MSI MAG 850W Fully Modular ATX Power Supply
The MSI MAG 850W is a full-size ATX unit, not a TFX or Flex ATX. It offers 850W of power with ATX 3.1 support and PCIe 5.1 compatibility. This is a major step up in capacity and modern connector support, including the 12V-2x6 connector. It is fully modular, unlike the fixed cables of the original. This unit is designed for standard ATX cases, not small form factors. You gain significant headroom for high-end gaming GPUs and modern standards, but you sacrifice the compact size entirely. It is for builders who prioritize performance and expandability over space constraints.
Corsair RM850x Shift 850W White ATX Power Supply
The Corsair RM850x Shift is another full-size ATX power supply, offering 850W with ATX 3.1 and PCIe 5.1 support. It is fully modular and comes in white. Like the MSI, it is incompatible with TFX or Flex ATX cases due to its larger 5.91 by 3.39 by 6.3 inch dimensions. It provides ample power for high-end builds and modern GPU connectors. You trade the compact, fixed-cable design of the original for maximum flexibility and power. This is the right choice if you are building a standard ATX tower and need reliable, high-wattage power with the latest cable standards.
Corsair RM1000x Shift 1000W Power Supply
The Corsair RM1000x Shift delivers 1000W in a full-size ATX form factor with ATX 3.0 support. It is fully modular and designed for high-power systems. Its dimensions are 5.91 by 5.08 by 7.09 inches, making it too large for any small form factor case. This unit offers the highest wattage on this list, suitable for extreme builds. You gain significant power capacity and ATX 3.0 compatibility, but you cannot use it in TFX or Flex ATX chassis. It is for builders who need maximum power headroom and do not care about compact form factors.
Quick picks
Our 7 picks
SilverStone 500W Gold TFX Power Supply
Best for: Standard TFX builds needing 500W
- Wattage
- 500W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Fixed Cable
- Fan Size
- 80mm
- Form Factor
- TFX
- Dimensions
- 6.9 × 3.4 × 2.6 inches
View on Amazon: SilverStone 500W Gold TFX Power Supply Affiliate link
This SilverStone unit delivers 500W of continuous power in a standard TFX form factor. It carries an 80 PLUS Gold efficiency rating and uses fixed cables. The 80mm fan operates quietly at 18 dBA. It supports 24/7 operation at 50°C. This power supply suits users needing reliable, compact power for small form factor builds.
Pros
- 500W continuous output
- 80 PLUS Gold efficiency
- Standard TFX form factor
- Quiet 18 dBA fan
Cons
- Fixed cable design limits flexibility
- 80mm fan may be noisier than larger units
- Limited to TFX chassis compatibility
Good fit if
- You need a standard TFX power supply
- You want high efficiency in a compact size
- You run your system 24/7
Skip if
- You require modular cables for clean builds
- You are using an ATX case
- You need more than 500W of power
Verdict: SilverStone 500W TFX Gold PSU offers solid efficiency and quiet operation for standard TFX cases. It fits users who prioritize reliability and fixed cabling in a small footprint.
SilverStone 500W Flex ATX Power Supply
Best for: compact builds needing reliable 500W power
- Wattage
- 500W
- Efficiency Rating
- 80 PLUS Gold
- Form Factor
- Flex ATX
- Dimensions
- 5.91 × 3.21 × 1.59 inches
- Weight
- 2.87 pounds
View on Amazon: SilverStone 500W Flex ATX Power Supply Affiliate link
The Silverstone FX500-G is a 500W Flex ATX power supply with 80 PLUS Gold efficiency. It delivers continuous power at 40°C using Japanese primary capacitors and a single +12V rail. The unit measures 3.21 by 1.59 by 5.91 inches and weighs 2.87 pounds. It suits users needing reliable compact power for small form factor builds that require sustained performance.
Pros
- 80 PLUS Gold efficiency rating
- 500W continuous output at 40°C
- Japanese primary capacitors
- Single +12V rail design
Cons
- Fixed cable configuration limits cable management options
- Heavier at 2.87 pounds compared to lighter alternatives
- Smaller 500W capacity restricts high-end GPU upgrades
Good fit if
- You need a compact Flex ATX form factor
- You require 80 PLUS Gold efficiency for lower heat
- You plan to run the unit continuously at high temperatures
Skip if
- You need a modular power supply for clean builds
- You plan to use high-end GPUs exceeding 500W total system draw
- You prefer a lighter power supply for tight spaces
Verdict: Silverstone FX500-G 500W Flex ATX PSU delivers stable power for compact systems needing high efficiency. It fits users prioritizing reliability and thermal performance in small form factor cases.
FSP FlexGURU 500W Flex ATX PSU
Best for: Compact SFF and 1U server builds
- Wattage
- 500W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Non-Modular
- Fan Size
- 40mm
- Warranty
- 5-Year
- Form Factor
- Flex ATX
View on Amazon: FSP FlexGURU 500W Flex ATX PSU Affiliate link
The FSP FlexGURU Pro 500W is a Flex ATX power supply delivering 500W of power with 80 PLUS Gold efficiency. It features a compact 40mm fan and Japanese electrolytic capacitors for stable performance. The unit includes all-black round cabling and comprehensive safety protections. It suits small form factor builds, 1U servers, and networking gear where space is tight.
Pros
- 80 PLUS Gold efficiency rating for reduced heat and energy use
- 40mm fan with intelligent speed control for thermal management
- Japanese electrolytic capacitors ensure reliable voltage regulation
- Comprehensive safety protections including UVP, OVP, and SCP
Cons
- Fixed cabling limits cable management flexibility
- 40mm fan size may generate more noise than larger units
- Heavy at 2.18 pounds for its class
Good fit if
- You need a compact Flex ATX PSU for SFF builds
- You require 80 PLUS Gold efficiency for energy savings
- You are building a 1U server or networking appliance
Skip if
- You need a modular power supply for custom cable routing
- You require a standard ATX form factor for desktop cases
- You prioritize silent operation with a larger fan size
Verdict: FSP FlexGURU Pro 500W Gold Flex ATX fits small form factor builders who need reliable power in a tight space. It is ideal for 1U servers or networking gear where Gold efficiency and compact dimensions matter.
SilverStone 400W TFX Power Supply
Best for: compact TFX builds needing efficiency
- Wattage
- 400W
- Efficiency Rating
- 80 PLUS Gold
- PCIe Connector Type
- 6+2pin
- Fan Size
- 80mm
- Form Factor
- TFX
- Dimensions
- 6.9 × 3.4 × 2.6 inches
View on Amazon: SilverStone 400W TFX Power Supply Affiliate link
This SilverStone unit delivers 400W of continuous power in a compact TFX form factor. It holds 80 PLUS Gold certification for high efficiency and runs quietly with an 80mm fan rated at 18 dBA. The design supports single 6+2pin PCIe connectors and is built for 24/7 operation at 40°C. You should choose this if your build requires a small footprint with reliable efficiency.
Pros
- 400W continuous output at 40°C
- 80 PLUS Gold efficiency rating
- Quiet 80mm fan at 18 dBA
- Standard TFX form factor
Cons
- Lower 400W wattage compared to 500W alternatives
- Single PCIe 6+2pin connector support
- No modular cable management
Good fit if
- You need a small TFX power supply
- You prioritize high efficiency ratings
- You require quiet operation under load
Skip if
- You need more than 400W of power
- You require multiple PCIe connectors
- You prefer fully modular cables
Verdict: SilverStone 400W TFX Gold PSU offers solid efficiency and quiet performance for compact builds. It fits users who need reliable power in a small space but do not require high wattage or modular flexibility.
MSI MAG 850W Fully Modular ATX Power Supply
Best for: High-end gaming PCs with modern GPUs
- Wattage
- 850W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Year
View on Amazon: MSI MAG 850W Fully Modular ATX Power Supply Affiliate link
This is an 850W fully modular power supply built for modern gaming rigs. It supports ATX 3.1 and PCIe 5.1 standards with a 12V-2x6 connector for next-gen graphics cards. The 80 Plus Gold efficiency rating ensures reliable power delivery. You should choose this unit if you need high wattage and the latest connector standards for your build.
Pros
- 850W output capacity
- Fully modular design
- 12V-2x6 PCIe connector
- 10-year warranty
Cons
- Large physical dimensions
- Only one EPS12V connector
- No native 24-pin to 12V-2x6 cable included
Good fit if
- You are building a high-end gaming PC
- You need ATX 3.1 compatibility
- You want a long warranty period
Skip if
- You have a small form factor case
- You only need 500W of power
- You require dual EPS12V connectors
Verdict: MSI MAG A850GL 850W ATX 3.1 is a powerful choice for gamers who need ample headroom and modern PCIe 5.1 support. It fits best in standard ATX cases where its larger size is not an issue.
Corsair RM850x Shift 850W White ATX Power Supply
Best for: high-wattage ATX builds
- Wattage
- 850W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- PCIe 5.1
- Dimensions
- 6.3 × 5.91 × 3.39 inches
View on Amazon: Corsair RM850x Shift 850W White ATX Power Supply Affiliate link
This Corsair unit delivers 850W of power in a fully modular ATX form factor. It meets 80 Plus Gold efficiency standards and supports the latest ATX 3.1 and PCIe 5.1 specifications. The white finish and compact dimensions make it suitable for modern builds requiring high wattage and clean cable management.
Pros
- 850W output capacity
- Fully modular cable design
- 80 Plus Gold efficiency rating
- Supports ATX 3.1 standard
- Includes PCIe 5.1 connector
Cons
- Larger physical dimensions compared to TFX units
- Heavier build at 3.75 pounds
- White color may not match all cases
Good fit if
- You need high wattage for modern GPUs
- You prefer fully modular cable management
- You are building an ATX case
Skip if
- You require a compact TFX form factor
- You are limited to 500W power needs
- You need a black PSU for dark cases
Verdict: Corsair RM850x Shift 850W ATX is a high-capacity option for users upgrading to PCIe 5.1 compatible systems. It fits best in standard ATX cases where space allows for its larger footprint.
Corsair RM1000x Shift 1000W Power Supply
Best for: High-power ATX builds needing ATX 3.0
- 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 Corsair unit delivers 1000W of power with 80 Plus Gold efficiency. It features a fully modular design and ATX 3.0 compliance. The shift interface moves cables to the side for better airflow. You should choose this if you need high wattage for modern GPUs. The ATX 3.0 standard supports new PCIe 5.0 connectors. It is a robust option for demanding builds.
Pros
- 1000W output capacity
- 80 Plus Gold efficiency rating
- ATX 3.0 compliance
- Fully modular cable design
Cons
- Larger physical dimensions than TFX units
- Heavier build at 4.2 pounds
- ATX form factor requires compatible case
Good fit if
- You need high wattage for powerful components
- You want ATX 3.0 native support
- You prefer fully modular cables
Skip if
- You require a compact TFX form factor
- You have a small SFX case
- You need lower wattage than 1000W
Verdict: Corsair RM1000x Shift 1000W ATX 3.0 suits users needing high power and modern connectors. It fits standard ATX cases well but is too large for small form factor builds.
Specifications side by side
| Spec | SilverStone 500W Gold TFX Power Supply | SilverStone 500W Flex ATX Power Supply | FSP FlexGURU 500W Flex ATX PSU | SilverStone 400W TFX Power Supply | MSI MAG 850W Fully Modular ATX Power Supply | Corsair RM850x Shift 850W White ATX Power Supply | Corsair RM1000x Shift 1000W Power Supply |
|---|---|---|---|---|---|---|---|
| Wattage | 500W | 500W | 500W | 400W | 850W | 850W | 1000W |
| Efficiency Rating | 80 PLUS Gold | 80 PLUS Gold | 80 Plus Gold | 80 PLUS Gold | 80+ Gold | 80 Plus Gold | 80 Plus Gold |
| Modularity | Fixed Cable | not stated | Non-Modular | not stated | Fully Modular | Fully Modular | Fully Modular |
| ATX Version | not stated | not stated | not stated | not stated | ATX 3.1 | ATX 3.1 | ATX 3.0 |
| PCIe Connector Type | not stated | not stated | not stated | 6+2pin | 12V-2x6 | PCIe 5.1 | not stated |
| Fan Size | 80mm | not stated | 40mm | 80mm | not stated | not stated | not stated |
| Warranty | not stated | not stated | 5-Year | not stated | 10 Year | not stated | not stated |
| Form Factor | TFX | Flex ATX | Flex ATX | TFX | Compact | ATX | ATX |
| PCIe Version | not stated | not stated | not stated | not stated | PCIe 5.1 | PCIe 5.1 | not stated |
| Recommended Use | not stated | not stated | not stated | not stated | Gaming | not stated | not stated |
| Connector | not stated | not stated | not stated | not stated | 12V-2x6 Connector | not stated | not stated |
| Size | 500W | 500W | 500W | 400W | 850W (PCIE 5) | 850W | 1000W |
| Device Compatibility | not stated | not stated | NAS, PCs | not stated | not stated | not stated | not stated |
| Dimensions | 6.9 × 3.4 × 2.6 inches | 5.91 × 3.21 × 1.59 inches | 5.91 × 1.59 × 3.21 inches | 6.9 × 3.4 × 2.6 inches | 12 × 8.75 × 4.92 inches | 6.3 × 5.91 × 3.39 inches | 7.09 × 5.91 × 5.08 inches |
| Weight | not stated | 2.87 pounds | 2.18 pounds | not stated | not stated | 3.75 pounds | 4.2 pounds |
| Color | black (lead-free paint) | not stated | Black | black (lead-free paint) | not stated | White | Black |
| Model | SST-TX500-G | not stated | FLEX GURU 500-T | SST-TX400-G | not stated | not stated | not stated |
If you also need a compatible chassis, you can compare silverstone technology alta t1 aluminum alternatives for your system.
Frequently asked questions
Can I use a Flex ATX power supply in a standard TFX case?
You cannot directly swap them because the form factors differ. The SilverStone Flex ATX measures 1.59 inches in height, while the TFX model is 2.6 inches high. The mounting holes and physical dimensions do not align. You must choose a case designed for the specific form factor you select.
Which alternative offers the smallest physical footprint for tight builds?
The SilverStone Flex ATX model provides the thinnest profile among the 500W options. It measures 3.21 by 1.59 by 5.91 inches. This is significantly thinner than the standard TFX design. The FSP FlexGURU is also compact but shares the same height as the SilverStone Flex ATX.
Do these 500W units support modern PCIe 5.1 graphics cards?
The listed 500W units do not specify PCIe 5.1 support in their published data. Only the higher-wattage ATX models, like the MSI MAG 850W and Corsair RM850x Shift, explicitly list PCIe 5.1 compatibility. You should verify connector types on the 500W units before pairing them with high-end GPUs.
Is there a lower wattage option if I do not need 500W?
Yes, the SilverStone 400W TFX Gold PSU is available. It maintains the same 3.4 by 2.6 by 6.9 inch dimensions as the 500W TFX model. It offers 80 PLUS Gold efficiency but reduces output to 400W. This suits users who need reliability without requiring maximum power in a small space.
Which power supply is best for 1U server applications?
The FSP FlexGURU 500W is ideal for 1U servers and networking gear. It delivers Gold efficiency in a compact Flex ATX form factor. Its small dimensions and reliable power delivery fit tight server racks. It is specifically noted as suitable for environments where space and efficiency are critical constraints.
Can I use a fully modular ATX supply in a small form factor case?
You likely cannot fit a standard ATX supply in a small case. The MSI MAG 850W and Corsair RM850x Shift measure over 6 inches in length and nearly 5 inches in width. These are designed for standard ATX cases. Small form factor builds require the compact TFX or Flex ATX profiles.
What is the weight difference between the Flex ATX and TFX models?
The SilverStone Flex ATX weighs 2.87 pounds, while the FSP FlexGURU weighs 2.18 pounds. The TFX models do not list specific weights in the provided data. The Flex ATX options are generally lighter than the larger ATX units, which can weigh over 3.75 pounds.