SilverStone 700W Platinum SFX Power Alternatives: 6 Similar Picks Compared
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You are looking for silverstone technology silverstone sx700 pt sfx alternatives because your build needs might differ from the original. The SilverStone 700W Platinum SFX PSU delivers 80 Plus Platinum efficiency in a compact SFX form factor. It features a 92mm fan for quiet operation and uses all Japanese capacitors for reliability. This unit suits users who prioritize a small footprint and high efficiency without needing full modularity.
However, you might need more wattage, different connectors, or a specific ATX version. Some builds require ATX 3.1 support for modern GPUs, while others need higher power limits like 750W or 1000W. You may also prefer fully modular cables for cleaner cable management in tight spaces. We selected these 6 alternatives because their specifications overlap with the original. Each option shares the SFX or Mini ITX form factor and high efficiency ratings. This ensures they fit in similar cases while offering distinct features like larger fans or newer power standards.
Our top pick: SilverStone 700W Platinum SFX Power Supply.
How alternatives differ from original
SilverStone 750W Platinum SFX PSU
The SilverStone 750W Platinum SFX PSU offers 50 more watts than the original 700W model while maintaining the same 80 Plus Platinum efficiency rating. Both units share the identical SFX dimensions, measuring 4.92 by 2.5 by 3.94 inches. The key difference is modularity. The original unit appears to be semi-modular or non-modular based on its feature list, whereas this alternative is fully modular. This allows you to connect only the cables you need, reducing clutter in tight cases. If you require slightly higher power headroom and cleaner cable management, this fully modular option is a direct upgrade within the same form factor.
Lian Li 1000W SFX Platinum PSU
The Lian Li 1000W SFX Platinum PSU provides significantly more power than the original 700W unit, making it suitable for high-performance builds. It retains the 80 Plus Platinum efficiency rating and the standard SFX footprint of 4.92 by 2.5 by 3.94 inches. The primary trade-off is weight. This unit weighs 4.87 pounds, which is slightly heavier than the original at 4.59 pounds. It also comes in a white color option, offering aesthetic flexibility. If your system demands over 700 watts but you are constrained by SFX case dimensions, this higher-wattage alternative delivers the necessary power without compromising on efficiency or physical size compatibility.
ASRock PG-850PSF 850W SFX ATX 3.1
The ASRock PG-850PSF 850W SFX PSU bridges the gap between wattage and modern standards. It offers 850 watts, which is 150 watts more than the original, while maintaining 80 Plus Platinum efficiency. It supports the newer ATX 3.1 specification and PCIe 5.1, ensuring compatibility with the latest graphics cards. Like the original, it fits the standard SFX dimensions of 4.92 by 2.5 by 3.94 inches. However, it is fully modular and includes a ten-year warranty, which is longer than the typical coverage for standard SFX units. If you need modern connector support and higher power in a compact form, this is the superior technical choice.
EVGA SuperNOVA 750W Platinum PSU
The EVGA SuperNOVA 750W Platinum PSU is a standard ATX unit, not an SFX model. It measures 6.5 by 5.91 by 3.3 inches, which is significantly larger than the original 4.92 by 2.5 by 3.94 inch SFX form factor. It also weighs 5.95 pounds, compared to the original's 4.59 pounds. While it shares the 750W output and 80 Plus Platinum efficiency, it is fully modular and includes a ten-year warranty. This unit is only suitable if you are building in a standard ATX case rather than a small form factor chassis. It offers similar efficiency but lacks the compact footprint required for SFX builds.
FSP 500W Mini ITX Platinum PSU
The FSP 500W Mini ITX Platinum PSU is designed for much smaller builds. It features a Mini ITX form factor with dimensions of 5.9 by 3.2 by 1.6 inches, which is physically different from the standard SFX size of the original. It provides only 500 watts, which is 200 watts less than the original 700W model. However, it still achieves 80 Plus Platinum efficiency. It weighs just 3 pounds, making it lighter than the original. This unit is ideal for low-power Mini ITX systems where space is extremely limited and high wattage is not required. It sacrifices power for a smaller physical footprint.
SilverStone 700W Platinum SFX-L Power Supply
The SilverStone 700W Platinum SFX-L PSU maintains the same 700W output and 80 Plus Platinum efficiency as the original. It is fully modular, unlike the original which lists specific fan features but not modularity. The main difference is the cooling system. This unit uses a 120mm fan instead of the original's 92mm fan. This results in a slightly longer length of 5.12 inches compared to the original's 3.94 inches, while sharing the same width and height. It weighs 5.07 pounds, which is heavier than the original. If you prioritize quieter operation and can accommodate the extra length, the larger fan provides better thermals and noise performance.
Quick picks
Our 7 picks
SilverStone 700W Platinum SFX Power Supply
Best for: Compact builds under 700W
- Wattage
- 700W
- Efficiency Rating
- 80 PLUS Platinum
- Fan Size
- 92mm
- Form Factor
- SFX
- Dimensions
- 3.94 × 4.92 × 2.5 inches
- Weight
- 4.59 pounds
View on Amazon: SilverStone 700W Platinum SFX Power Supply Affiliate link
This SilverStone SX700-PT is a 700W SFX power supply with 80 PLUS Platinum efficiency. It uses a 92mm FDB fan for silent operation and features all Japanese capacitors. The unit delivers high performance on a single +12V rail. It suits users who need a compact, efficient power source for small form factor builds that do not require more than 700W.
Pros
- 80 PLUS Platinum efficiency rating
- 92mm FDB fan with 18 dBA minimum noise level
- Single +12V rail design
- All Japanese capacitors
Cons
- 700W output is lower than 750W and 1000W alternatives
- ATX adapter sold separately
- Heavier than typical SFX units at 4.59 pounds
Good fit if
- You need 80 PLUS Platinum efficiency
- You build in a standard SFX case
- Your system draws under 700W
Skip if
- You need more than 700W
- You want an included ATX adapter
- You prefer a lighter power supply
Verdict: SilverStone 700W SFX Platinum offers high efficiency and quiet operation for compact builds under 700W. It fits users prioritizing reliability and low noise in a small footprint.
SilverStone 750W Platinum SFX PSU
Best for: small form factor high efficiency builds
- Wattage
- 750W
- Efficiency Rating
- 80 Plus Platinum
- Modularity
- Fully Modular
- Fan Size
- 92mm
- Form Factor
- SFX
- Dimensions
- 3.94 × 4.92 × 2.5 inches
View on Amazon: SilverStone 750W Platinum SFX PSU Affiliate link
This SilverStone unit delivers 750W of power in a standard SFX form factor. It carries an 80 Plus Platinum efficiency rating and uses all Japanese capacitors. The fully modular design keeps cable management clean. A 92mm fan runs silently with auto-start based on load. It suits users needing reliable, high-efficiency power in a small desktop build.
Pros
- 80 Plus Platinum efficiency rating
- Fully modular cable design
- All Japanese capacitors
- 92mm dual ball bearing fan
Cons
- Smaller 92mm fan compared to 120mm alternatives
- Fixed SFX dimensions limit airflow options
- No remote or app control listed
Good fit if
- You need high efficiency in a small case
- You want fully modular cables
- You prefer silent operation under load
Skip if
- You require more than 750W
- You need a larger 140mm fan
- You want smart monitoring features
Verdict: SilverStone 750W SFX Platinum PSU fits small builds needing efficient, quiet power without extra size.
Lian Li 1000W SFX Platinum PSU
Best for: high-wattage SFX builds
- Wattage
- 1000W
- Efficiency Rating
- 80 Plus Platinum
- Form Factor
- SFX
- Dimensions
- 4.92 × 2.5 × 3.94 inches
- Weight
- 4.87 pounds
View on Amazon: Lian Li 1000W SFX Platinum PSU Affiliate link
This Lian Li power supply delivers 1000W of power in a compact SFX form factor. It carries 80 Plus Platinum certification for high efficiency. The unit features fanless operation at low loads to reduce noise. It includes an SFX-to-ATX bracket for broader case compatibility. Japanese capacitors support stable performance. This model suits users needing maximum wattage in a small chassis.
Pros
- 1000W output capacity for high-end builds
- 80 Plus Platinum efficiency rating
- Fanless operation at loads up to 40%
- Includes SFX-to-ATX mounting bracket
- Uses 105°C Japanese capacitors
Cons
- Heavier at 4.87 pounds than many competitors
- Higher price point for premium wattage
- Limited color options in Platinum tier
Good fit if
- You need 1000W in an SFX case
- You want silent operation at low loads
- You plan to use an ATX bracket
Skip if
- You require a standard ATX size
- You need a budget-friendly option
- You prefer Gold efficiency over Platinum
Verdict: Lian Li 1000W SFX Platinum PSU fits users who demand top-tier wattage and efficiency in a compact form. It is ideal for high-performance builds that require silent operation and flexible mounting options.
ASRock PG-850PSF 850W SFX ATX 3.1
Best for: High-power SFF builds with ATX 3.1
- Wattage
- 850W
- Efficiency Rating
- 80 Plus Platinum, Cybenetics Platinum
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Fan Size
- 92mm
View on Amazon: ASRock PG-850PSF 850W SFX ATX 3.1 Affiliate link
The ASRock PG-850PSF delivers 850W in a compact SFX frame. It holds 80 Plus Platinum and Cybenetics Platinum efficiency ratings. The unit supports ATX 3.1 and PCIe 5.1 standards. A native 12V-2x6 connector ensures compatibility with modern GPUs. Japanese capacitors provide stable power delivery. This model suits builders needing high wattage in a small case.
Pros
- 850W output in SFX form factor
- ATX 3.1 and PCIe 5.1 ready
- Native 12V-2x6 connector with TempGuard
- Cybenetics Platinum and Lambda A++ certified
- 10-year warranty coverage
Cons
- Higher wattage may exceed small case limits
- 92mm fan size restricts airflow options
- No app or software control mentioned
Good fit if
- You need 850W in a small form factor
- You want ATX 3.1 compatibility
- You prefer quiet operation under load
Skip if
- You require ATX 3.0 only
- You need a larger 120mm fan
- You want software monitoring tools
Verdict: ASRock PG-850PSF 850W SFX ATX 3.1 fits SFF builds needing high power and modern connector support. It suits users prioritizing efficiency and quiet operation over software features.
EVGA SuperNOVA 750W Platinum PSU
Best for: standard ATX cases needing high efficiency
- Wattage
- 750W
- Efficiency Rating
- 80 PLUS Platinum
- Modularity
- Fully Modular
- Fan Size
- 140mm
- Warranty
- 10 Year
- Dimensions
- 6.5 × 5.91 × 3.3 inches
View on Amazon: EVGA SuperNOVA 750W Platinum PSU Affiliate link
The EVGA SuperNOVA 750 P2 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. This unit measures 6.5 by 3.3 by 5.91 inches and weighs 5.95 pounds. It suits users who want high efficiency and a long warranty in a compact form factor.
Pros
- 80 PLUS Platinum certification for high efficiency
- Fully modular design reduces cable clutter
- 140mm double ball bearing fan for cooling
- 10-year warranty coverage
- 100% Japanese capacitors for reliability
Cons
- Standard ATX form factor, not SFX
- Heavier than typical SFX units at 5.95 pounds
- Larger dimensions than compact SFX alternatives
Good fit if
- You need 80 PLUS Platinum efficiency
- You want a 10-year warranty
- You prefer fully modular cables
Skip if
- You require a small SFX form factor
- You have a tight case with limited height
- You need a lightweight power supply
Verdict: EVGA SuperNOVA 750 P2 Platinum offers strong efficiency and a long warranty, but its standard ATX size makes it unsuitable for small form factor builds that require SFX units.
FSP 500W Mini ITX Platinum PSU
Best for: Low-power Mini ITX builds
- Wattage
- 500W
- Efficiency Rating
- 80 Plus Platinum
- Form Factor
- Mini ITX
- Dimensions
- 5.9 × 3.2 × 1.6 inches
- Weight
- 3 pounds
View on Amazon: FSP 500W Mini ITX Platinum PSU Affiliate link
This FSP unit delivers 500W of power with 80 Plus Platinum efficiency. Its compact Mini ITX form factor measures 3.2 by 1.6 by 5.9 inches. The design includes a 4 cm internal fan and vacuum-impregnated transformers for reliability. You get protections for over-voltage and short circuits. It suits small builds where space is tight and efficiency matters.
Pros
- 80 Plus Platinum efficiency rating
- Compact Mini ITX dimensions
- Over-voltage and short circuit protections
- 100K hour MTBF rating
Cons
- Lower 500W wattage than most competitors
- Small 4 cm internal fan
- No mention of full modularity
Good fit if
- You need a small form factor build
- You prioritize high efficiency
- You require solid protection features
Skip if
- You need more than 500W
- You prefer fully modular cables
- You want larger fan cooling
Verdict: FSP 500W Platinum Mini ITX PSU fits users who need high efficiency in a tiny case. It is a solid choice for low-power Mini ITX systems.
SilverStone 700W Platinum SFX-L Power Supply
Best for: quiet small form factor builds
- Wattage
- 700W
- Efficiency Rating
- 80 PLUS Platinum
- Modularity
- Fully Modular
- PCIe Connector Type
- PCI-E 8/6pin
- Fan Size
- 120mm
- Form Factor
- SFX
View on Amazon: SilverStone 700W Platinum SFX-L Power Supply Affiliate link
This SilverStone unit offers 700W of continuous power in an SFX form factor. It features a 120mm fan for quieter operation compared to standard SFX units. The 80 PLUS Platinum certification ensures high efficiency. Fully modular cables help manage space in small cases. It supports quad PCIe 8/6pin connectors for high-end graphics cards. This model suits builders prioritizing acoustics and efficiency in a compact chassis.
Pros
- 120mm fan for reduced noise
- 80 PLUS Platinum efficiency rating
- Fully modular cable design
- Supports quad PCIe 8/6pin connectors
- 700W continuous output
Cons
- Larger dimensions than standard SFX units
- Heavier build at 5.07 pounds
- Lower wattage than some competitors
Good fit if
- You need quieter operation in a small case
- You require high efficiency for power savings
- You have space for the slightly larger SFX-L form factor
Skip if
- You need maximum wattage for extreme builds
- You require strict standard SFX dimensions
- You prefer smaller 80mm fan units for compactness
Verdict: SilverStone 700W SFX 120mm Fan PSU is a quiet, efficient choice for small form factor builds where noise matters. It fits users who can accommodate its slightly larger size for better thermals.
Specifications side by side
| Spec | SilverStone 700W Platinum SFX Power Supply | SilverStone 750W Platinum SFX PSU | Lian Li 1000W SFX Platinum PSU | ASRock PG-850PSF 850W SFX ATX 3.1 | EVGA SuperNOVA 750W Platinum PSU | FSP 500W Mini ITX Platinum PSU | SilverStone 700W Platinum SFX-L Power Supply |
|---|---|---|---|---|---|---|---|
| Wattage | 700W | 750W | 1000W | 850W | 750W | 500W | 700W |
| Efficiency Rating | 80 PLUS Platinum | 80 Plus Platinum | 80 Plus Platinum | 80 Plus Platinum, Cybenetics Platinum | 80 PLUS Platinum | 80 Plus Platinum | 80 PLUS Platinum |
| Modularity | not stated | Fully Modular | not stated | Fully Modular | Fully Modular | not stated | Fully Modular |
| ATX Version | not stated | not stated | not stated | ATX 3.1 | not stated | not stated | not stated |
| PCIe Connector Type | not stated | not stated | not stated | 12V-2x6 | not stated | not stated | PCI-E 8/6pin |
| Fan Size | 92mm | 92mm | not stated | 92mm | 140mm | not stated | 120mm |
| Warranty | not stated | not stated | not stated | 10 Years | 10 Year | not stated | not stated |
| Form Factor | SFX | SFX | SFX | SFX | not stated | Mini ITX | SFX |
| PCIe Version | not stated | not stated | not stated | PCIe 5.1 | not stated | not stated | not stated |
| Recommended Use | not stated | not stated | not stated | Gaming | not stated | not stated | not stated |
| Size | 700W | 750W | 1000W,White | 850W | 750W | not stated | 700W SFX12V |
| Dimensions | 3.94 × 4.92 × 2.5 inches | 3.94 × 4.92 × 2.5 inches | 4.92 × 2.5 × 3.94 inches | 3.94 × 4.92 × 2.5 inches | 6.5 × 5.91 × 3.3 inches | 5.9 × 3.2 × 1.6 inches | 5.12 × 4.92 × 2.5 inches |
| Weight | 4.59 pounds | not stated | 4.87 pounds | not stated | 5.95 pounds | 3 pounds | 5.07 pounds |
| Model | SX700-PT | PS-SX750-PT-X | SP1000P.W | 90-UFP085-PFUAAB | 220-P2-0750-X1 | FSP500-50FSPT | SST-SX700-LPT |
| Color | not stated | not stated | White | not stated | Black | not stated | not stated |
If you need a matching chassis, you can compare silverstone technology alta t1 aluminum alternatives for component clearance.
Frequently asked questions
Which SFX power supply offers the highest wattage for compact builds?
The Lian Li 1000W SFX Platinum PSU provides the highest wattage in this comparison. It delivers 1000W of power while maintaining an 80 Plus Platinum efficiency rating. This unit measures 4.92 by 3.94 by 2.5 inches and weighs 4.87 pounds. It is designed for users who need maximum performance in a small form factor without sacrificing efficiency standards.
Does the ASRock PSU support modern GPU connectors?
Yes, the ASRock PG-850PSF supports modern connectors through its ATX 3.1 standard. It also features PCIe 5.1 compatibility for latest graphics cards. This 850W unit offers full modularity and 80 Plus Platinum efficiency. Its compact SFX dimensions allow it to fit in small cases while providing the necessary power for high-end gaming hardware.
Is there a fully modular option with a 120mm fan?
The SilverStone 700W Platinum SFX-L Power Supply is fully modular and includes a 120mm fan. This larger fan size helps improve thermals and reduce noise in small form factor builds. It measures 5.12 inches in length, which is slightly longer than standard SFX units. This design choice prioritizes quiet operation for users sensitive to acoustic output.
Can I use a standard ATX power supply in an SFX case?
No, standard ATX units like the EVGA SuperNOVA 750W Platinum are too large for SFX cases. The EVGA model measures 6.5 by 5.91 by 3.3 inches, which exceeds SFX dimensions. You must use a dedicated SFX or Mini ITX power supply for small builds. The EVGA unit is suitable only for standard ATX cases where space allows for larger components.
What is the smallest form factor available in this list?
The FSP 500W Mini ITX Platinum PSU has the smallest physical dimensions. It measures 5.9 inches in length, 3.2 inches in width, and 1.6 inches in height. This unit weighs only 3 pounds, making it ideal for very tight spaces. It offers 80 Plus Platinum efficiency, ensuring high performance despite its compact Mini ITX form factor.
How do the dimensions of the SilverStone 750W and 700W models compare?
Both the SilverStone 750W Platinum SFX PSU and the 700W Platinum SFX PSU share identical dimensions. They both measure 4.92 by 2.5 by 3.94 inches. This consistency allows them to fit in the same cases without modification. The primary difference is the wattage output, with the 750W model providing 50W more power while maintaining the same compact footprint.