6 Best Alternatives to the Be Quiet! TFX Power 3 TFX (2026)
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The Be Quiet! TFX Power 3 serves as a reliable baseline for users seeking a compact 300W TFX unit. It fits well in small cases or as a direct replacement for specific OEM systems like the Dell Inspiron 530s. If you are looking for be quiet tfx power 3 alternatives, you might need different specifications. You could require higher wattage, better efficiency ratings, or a different brand reputation. The original unit prioritizes compact size over raw power output.
The 6 alternatives on this list were chosen because their specs overlap with the original. Some options offer significantly more power, such as the SilverStone 700W Gold TFX. Others provide higher efficiency standards like 80 Plus Platinum, which the Be Quiet unit does not specify. You might also prefer standard ATX form factors if your case allows for larger units. This guide compares these options strictly by their published specifications to help you find the right fit for your build.
Our top pick: Be Quiet! TFX Power 3 TFX Power Supply.
How alternatives compare to the original
SilverStone 700W Gold TFX Power Supply
The SilverStone 700W Gold TFX Power Supply offers more than double the wattage of the Be Quiet! unit, making it suitable for higher-demand components in compact cases. It shares the same TFX form factor and nearly identical dimensions, measuring 3.4 by 2.6 by 6.9 inches. Its 80 Plus Gold efficiency rating indicates better power conversion than the baseline model. You should choose this if you need serious power in a small footprint. It sacrifices the brand recognition of Be Quiet for higher output and efficiency certification.
BackPlanePro 300W TFX Power Supply
The BackPlanePro 300W TFX Power Supply matches the wattage of the Be Quiet! unit but uses a grey color and weighs slightly less at 3 pounds. It maintains the same 2.56 by 3.35 by 6.89 inch dimensions, ensuring it fits in the same chassis. This option is ideal for replacing older Dell SFF systems or powering low-demand MicroATX builds. It prioritizes compact size and reliability over high wattage or modular flexibility. If you need a direct replacement for legacy OEM hardware, this unit provides the necessary form factor compatibility.
EVGA SuperNOVA 750 G2 750W Power Supply
The EVGA SuperNOVA 750 G2 is a standard ATX unit, not a TFX model, so it will not fit in compact cases designed for the Be Quiet! Power 3. It offers 750W of power and full modularity, along with an 80 Plus Gold efficiency rating. Its dimensions are significantly larger at 5.9 by 3.4 by 7 inches. You should pick this if you have a standard tower case and prioritize reliability and cable management over compact sizing. It provides a decade of support, which exceeds the typical warranty for TFX units.
Apevia 300W TFX Power Supply
The Apevia 300W TFX Power Supply offers the same wattage as the Be Quiet! unit but weighs less at 2.1 pounds. It features slightly different dimensions, measuring 3.23 by 2.5 by 6.75 inches. This compact option is designed for low-power builds where form factor compatibility is key. It lacks modular flexibility and high wattage, focusing instead on fitting into tight spaces. You should choose this if you prioritize a lighter weight and lower profile over brand-specific features. It serves as a practical alternative for basic system requirements.
EVGA SuperNOVA 750W Platinum PSU
The EVGA SuperNOVA 750W Platinum PSU is a standard ATX unit with 80 Plus Platinum efficiency, offering top-tier power conversion. It is fully modular and weighs 5.95 pounds, with dimensions of 5.91 by 3.3 by 6.5 inches. It does not fit compact TFX cases. You should select this for standard desktop builds where performance and cable management matter more than size. It provides a 10-year warranty and significantly higher wattage than the Be Quiet! TFX unit, making it suitable for high-end components in larger chassis.
EVGA SuperNova G2 1300W Gold Power Supply
The EVGA SuperNova G2 1300W Gold Power Supply is a large standard ATX unit, measuring 12 by 11.2 by 7.4 inches and weighing 4 kilograms. It offers 1300W of power with 80 Plus Gold efficiency. It is not compatible with compact TFX cases. You should choose this only if you have space for a large unit and need high power for demanding builds. It provides substantial wattage and efficiency for standard towers, but its size makes it unsuitable for any system requiring the compact form factor of the Be Quiet! Power 3.
Quick picks
Our 7 picks
Be Quiet! TFX Power 3 TFX Power Supply
Best for: Compact TFX builds needing 300W
- Form Factor
- TFX
- Dimensions
- 6.89 × 3.35 × 2.56 inches
- Weight
- 3.09 pounds
This Be Quiet! TFX Power 3 unit is a 300W power supply designed for compact systems using the TFX form factor. It measures 6.89 by 3.35 by 2.56 inches and weighs 3.09 pounds. The black chassis fits standard TFX cases. You should choose this if you need a reliable replacement for small form factor builds, particularly those requiring 300W of power for Dell Inspiron systems or similar setups.
Pros
- TFX form factor for compact cases
- 300W output capacity
- Compact dimensions of 6.89 x 3.35 x 2.56 inches
- Black chassis color
Cons
- Limited 300W power output restricts high-end builds
- Fixed cable design reduces flexibility
- Heavier at 3.09 pounds compared to some lighter alternatives
Good fit if
- You are building or upgrading a small form factor PC
- You need a 300W replacement for a Dell Inspiron system
- You require a TFX form factor power supply
Skip if
- You need more than 300W of power
- You prefer a fully modular cable setup
- You are building a standard ATX desktop
Verdict: Be Quiet TFX Power 3 300W is a solid choice for users needing a compact 300W TFX unit. It fits well in small cases or as a direct replacement for specific OEM systems like the Dell Inspiron 530s.
SilverStone 700W Gold TFX Power Supply
Best for: compact cases needing high wattage
- Wattage
- 700W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Fixed Cable
- Fan Size
- 80mm
- Form Factor
- TFX
- Dimensions
- 6.9 × 3.4 × 2.6 inches
This SilverStone unit delivers 700W of continuous power in a standard TFX form factor. It carries an 80 PLUS Gold efficiency rating and operates quietly with an 80mm fan rated at 18 dBA. The fixed cable design keeps the build clean, while the 700W output supports demanding components. It is built for 24/7 operation and fits well in compact cases that require high wattage without the bulk of larger units.
Pros
- 700W continuous power output
- 80 PLUS Gold efficiency certification
- Quiet 80mm fan operation
- Standard TFX form factor
Cons
- Fixed cable design limits cable management flexibility
- 80mm fan may be louder than larger 120mm or 140mm alternatives
- Heavier and bulkier than lower-wattage TFX options
Good fit if
- You need high wattage in a small form factor case
- You prioritize energy efficiency and quiet operation
- You are building a compact PC with power-hungry components
Skip if
- You require fully modular cables for custom builds
- You need a power supply under 500W
- You are using a standard ATX case
Verdict: SilverStone 700W TFX Gold PSU is ideal for compact builds needing serious power. It offers high efficiency and quiet running in a small package. Choose this if you have a tight case but need 700W.
BackPlanePro 300W TFX Power Supply
Best for: Dell Inspiron SFF replacements and low-power builds
- Wattage
- 300W
- Fan Size
- 80mm
- Warranty
- One Year
- Form Factor
- TFX
- Dimensions
- 6.89 × 2.56 × 3.35 inches
- Weight
- 3 pounds
The BackPlanePro 300W TFX Power Supply is designed for MicroATX slim cases like the Dell Inspiron 530s. It features an 80mm silent fan for cooling and active PFC for efficiency. This unit offers a standard TFX form factor with a one-year warranty. It suits users needing a direct replacement for older Dell systems or those building small form factor PCs with modest power needs.
Pros
- 300W output capacity for low-power builds
- 80mm silent fan for thermal management
- Active PFC with auto-switch support
- TFX form factor fits slim cases
Cons
- 300W wattage limits high-end components
- Only one-year warranty coverage
- Fixed cable configuration reduces flexibility
Good fit if
- You need a direct replacement for a Dell Inspiron 530s or 531s
- You are building a low-power MicroATX slim case system
- You prioritize compact TFX form factor over high wattage
Skip if
- You require more than 300W of power
- You need fully modular cabling for clean builds
- You want a longer warranty than one year
Verdict: The BackPlanePro 300W TFX Power Supply is a practical option for replacing older Dell SFF systems or powering low-demand MicroATX builds. It fits users who prioritize compact size and reliability over high wattage or modular flexibility.
EVGA SuperNOVA 750 G2 750W Power Supply
Best for: Standard ATX builds needing efficiency
- Wattage
- 750W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Fully Modular
- Fan Size
- 140mm
- Warranty
- 10 Year
- Dimensions
- 7 × 5.9 × 3.4 inches
The EVGA SuperNOVA 750 G2 is a fully modular power supply with 750W output and 80 PLUS Gold efficiency. It uses a 140mm double ball bearing fan and Japanese capacitors for reliability. This unit includes full protection circuits and a 10-year warranty. It suits users needing high efficiency and long-term support, though it is a standard ATX size rather than TFX.
Pros
- 80 PLUS Gold efficiency rating
- Fully modular cable design
- 10-year warranty coverage
- 140mm double ball bearing fan
Cons
- Standard ATX form factor, not TFX
- 750W output lower than 1300W alternative
- Heavier build at 6.6 pounds
Good fit if
- You need high efficiency for lower heat
- You want a fully modular setup
- You value a long warranty period
Skip if
- You require a TFX form factor
- You need more than 750W of power
- You prefer a smaller, lighter unit
Verdict: The EVGA SuperNOVA 750 G2 80+ Gold offers solid efficiency and a decade of support for standard ATX builds. It fits users prioritizing reliability and cable management over compact TFX sizing.
Apevia 300W TFX Power Supply
Best for: compact low-power systems
- Wattage
- 300W
- Fan Size
- 80mm
- Form Factor
- TFX
- Dimensions
- 6.75 × 3.23 × 2.5 inches
- Weight
- 2.1 pounds
The Apevia TFX-AP300W is a 300W TFX power supply designed for compact systems. It features an 80mm fan for forced air ventilation and supports input voltages from 115V to 230V. The unit provides specific output rails, including +12V at 20A. It measures 6.75 inches in length and weighs 2.1 pounds. This model suits users needing a standard TFX form factor with basic protections for low-power builds.
Pros
- 300W total wattage output
- Standard TFX form factor
- 80mm cooling fan
- Supports 115-230V input
Cons
- Lower 300W capacity compared to 700W+ alternatives
- Smaller 80mm fan may run louder than larger units
- Fixed cable configuration limits cable management
Good fit if
- You need a standard TFX power supply for a small form factor PC
- Your system components require no more than 300W of power
- You want a unit with basic over-voltage and short-circuit protections
Skip if
- You require high wattage above 300W for powerful components
- You need fully modular cables for clean cable management
- You prefer larger 120mm fans for quieter operation
Verdict: Apevia 300W TFX Power Supply is a compact option for low-power builds. It fits users who prioritize form factor compatibility over high wattage or modular flexibility.
EVGA SuperNOVA 750W Platinum PSU
Best for: high-efficiency standard ATX builds
- Wattage
- 750W
- Efficiency Rating
- 80 PLUS Platinum
- Modularity
- Fully Modular
- Fan Size
- 140mm
- Warranty
- 10 Year
- Dimensions
- 6.5 × 5.91 × 3.3 inches
This is a fully modular 750W power supply with 80 PLUS Platinum efficiency. It uses a 140mm double ball bearing fan and Japanese capacitors for reliability. The unit measures 6.5 by 5.91 by 3.3 inches. It suits users who need high efficiency and clean cable management in a standard ATX case.
Pros
- 80 PLUS Platinum efficiency rating
- Fully modular cable design
- 140mm double ball bearing fan
- 10-year warranty coverage
Cons
- Standard ATX size, not TFX form factor
- Heavier build at 5.95 pounds
- Larger dimensions than compact TFX units
Good fit if
- You need high efficiency for lower heat output
- You want fully modular cables for clean builds
- You are building in a standard ATX case
Skip if
- You are building in a small form factor case requiring TFX
- You need a compact 3U height unit
- You prioritize minimal weight over efficiency
Verdict: EVGA SuperNOVA 750 P2 80+ Platinum offers top-tier efficiency and modularity for standard desktop builds. It fits users who prioritize performance and cable management over compact form factors.
EVGA SuperNova G2 1300W Gold Power Supply
Best for: High-power standard ATX builds
- Wattage
- 1300W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Modular
- Dimensions
- 7.4 × 12 × 11.2 inches
- Weight
- 4 kilograms
This is a high-wattage modular power supply with 1300W output and 80 Plus Gold efficiency. It measures 12 by 11.2 by 7.4 inches and weighs 4 kilograms. The size is significantly larger than TFX units. You need this for big cases, not small form factor builds. It offers strong power delivery for demanding systems.
Pros
- 1300W maximum wattage
- 80 Plus Gold efficiency rating
- Fully modular cable design
- Weighs 4 kilograms
Cons
- Dimensions exceed TFX standards
- Heavy 4kg build
- Not suitable for SFF cases
Good fit if
- You need 1300W of power
- You have a standard ATX case
- You want high efficiency
Skip if
- You are building a small form factor PC
- You need a TFX form factor
- You require a compact 120mm unit
Verdict: EVGA SuperNova G2 1300W Gold Modular is a powerful option for standard towers. It does not fit small cases. Choose it only if you have space for a large unit.
Specifications side by side
| Spec | Be Quiet! TFX Power 3 TFX Power Supply | SilverStone 700W Gold TFX Power Supply | BackPlanePro 300W TFX Power Supply | EVGA SuperNOVA 750 G2 750W Power Supply | Apevia 300W TFX Power Supply | EVGA SuperNOVA 750W Platinum PSU | EVGA SuperNova G2 1300W Gold Power Supply |
|---|---|---|---|---|---|---|---|
| Wattage | not specified | 700W | 300W | 750W | 300W | 750W | 1300W |
| Efficiency Rating | not specified | 80 PLUS Gold | not specified | 80 PLUS Gold | not specified | 80 PLUS Platinum | 80 Plus Gold |
| Modularity | not specified | Fixed Cable | not specified | Fully Modular | not specified | Fully Modular | Modular |
| Fan Size | not specified | 80mm | 80mm | 140mm | 80mm | 140mm | not specified |
| Warranty | not specified | not specified | One Year | 10 Year | not specified | 10 Year | not specified |
| Form Factor | TFX | TFX | TFX | not specified | TFX | not specified | not specified |
| Size | not specified | 700W | not specified | 750W | TFX 300W | 750W | not specified |
| Dimensions | 6.89 × 3.35 × 2.56 inches | 6.9 × 3.4 × 2.6 inches | 6.89 × 2.56 × 3.35 inches | 7 × 5.9 × 3.4 inches | 6.75 × 3.23 × 2.5 inches | 6.5 × 5.91 × 3.3 inches | 7.4 × 12 × 11.2 inches |
| Weight | 3.09 pounds | not specified | 3 pounds | 6.6 pounds | 2.1 pounds | 5.95 pounds | 4 kilograms |
| Color | Black | black (lead-free paint) | Grey | not specified | Black | Black | not specified |
| Model | BN323 | SST-TX700-G | LYSB00CXAUQJK-CMPTRACCS | 220-G2-0750-XR | TFX-AP300W | 220-P2-0750-X1 | 120-G2-1300-X3 |
If you need portable battery backup instead of a stationary supply, compare sharge 3 in 1 power alternatives.
Frequently asked questions
Is the SilverStone 700W Gold TFX compatible with small cases?
Yes, it fits compact builds. It shares the TFX form factor with nearly identical dimensions to the Be Quiet! unit. This allows it to serve as a high-wattage upgrade for cases that require the smaller TFX size. It provides serious power without sacrificing space.
What is the best budget TFX power supply for Dell systems?
The BackPlanePro 300W TFX Power Supply is a practical choice for replacing older Dell SFF systems. It matches the compact size needed for these OEM replacements. It prioritizes reliability and form factor compatibility over high wattage or modular flexibility.
Can I use a standard ATX power supply in a TFX case?
No, standard ATX units do not fit TFX cases. The EVGA SuperNOVA 750 G2 and Platinum models are designed for standard ATX builds. Their larger physical dimensions make them incompatible with the tight spaces of compact TFX chassis.
Which TFX unit offers the highest wattage?
The SilverStone 700W Gold TFX Power Supply offers the highest wattage among TFX options. It provides 700W in a compact package. This makes it ideal for users who need significant power but are constrained by a small case size.
Is the Apevia 300W TFX suitable for low-power builds?
Yes, it is a compact option for low-power builds. It fits users who prioritize form factor compatibility over high wattage. Its small dimensions make it a good fit for systems that do not require extensive power delivery.
Does the EVGA SuperNOVA 1300W fit in small cases?
No, it does not fit small cases. This unit is designed for standard towers. Its large physical dimensions require ample space. You should only choose this unit if you have a standard ATX case with room for a large power supply.