SilverStone Technology SST-SX700-LPT-USA 700W Alternatives: 6 Similar Picks Compared
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You are looking for silverstone technology sst sx700 lpt usa 700w alternatives because your build requirements may have shifted. The original unit delivers 700W of continuous power with 80 PLUS Platinum efficiency and a quiet 120mm fan. It uses a fully modular design with short cables and supports quad PCIe connectors. This setup works well for small-form-factor cases that need high efficiency and silent operation under load.
However, you might need a different form factor, wattage, or brand. Some users require standard ATX dimensions for larger cases. Others may prefer Gold efficiency ratings or higher power outputs like 850W or 1000W. The alternatives on this list were chosen because their specs overlap with the original. We compared modularity, fan sizes, efficiency ratings, and physical dimensions. This guide helps you find a power supply that matches your specific case constraints and performance needs without guessing.
Our top pick: SilverStone 700W Platinum SFX-L Power Supply.
Comparing SFX Power Supply Options
SilverStone 750W Platinum SFX PSU
This SilverStone unit offers 750W of power within standard SFX dimensions, making it a compact alternative to the original’s SFX-L form factor. You gain 50W of continuous output and a shorter length of 3.94 inches compared to the 5.12 inches of the SST-SX700-LPT. It retains the 80 PLUS Platinum efficiency rating and fully modular cabling. The trade-off is a smaller 92mm fan instead of the original’s 120mm unit, which may affect noise levels under heavy load. This model suits builders who need maximum power density in a tight chassis without requiring the extra depth of an SFX-L supply.
The Lian Li SP750 provides 750W of power with 80 PLUS Gold efficiency, which is one tier below the original’s Platinum rating. It maintains the fully modular design but uses a standard SFX footprint with a length of 4 inches. This is shorter than the original’s 5.12-inch SFX-L length, offering better clearance in small cases. You lose the higher efficiency and the larger 120mm fan, opting instead for a more compact cooling solution. This option is practical for users who prioritize cable management and a smaller physical footprint over maximum energy efficiency and silent operation under low loads.
This Lian Li model delivers 850W of power, exceeding the original’s 700W output. It features 80 PLUS Gold efficiency and fully modular cabling in a white SFX form factor. The primary difference is aesthetic, catering to builds with white-themed components. You gain significant wattage headroom but accept a lower efficiency rating compared to the original’s Platinum certification. The data does not specify dimensions, but it is designed for small form factor cases. This pick is ideal for builders who need higher power capacity for demanding GPUs and prefer a specific color scheme over the highest possible efficiency.
The Lian Li SP850B offers 850W of power with 80 PLUS Gold efficiency in a fully modular SFX design. It provides 150W more continuous output than the original SilverStone unit. However, the listed dimensions are significantly larger, which may not fit standard SFX cases. It uses 16 AWG cables for power delivery. You trade the original’s compact SFX-L size and Platinum efficiency for higher wattage and potentially different cable management needs. This unit is suitable for builders who have verified their case can accommodate larger SFX units and require extra power for high-end graphics cards.
This ASRock unit provides 850W of power with 80 PLUS Platinum efficiency, matching the original’s efficiency rating while offering 150W more output. It features ATX 3.1 support and PCIe 5.1 compatibility, which the original lacks. The form factor is standard SFX with a length of 3.94 inches, making it shorter than the original’s 5.12-inch SFX-L design. It is fully modular and includes a 10-year warranty. This is the best choice for enthusiasts building compact gaming PCs who need the latest power standards and higher wattage without sacrificing efficiency.
The EVGA SuperNOVA 750 G2 is a standard ATX power supply, not an SFX unit. It offers 750W of power with 80 PLUS Gold efficiency and fully modular cabling. The dimensions are 5.9 by 3.4 by 7 inches, which is much larger than the original’s SFX-L form factor. It includes a 10-year warranty. This option is for builders using standard ATX cases rather than small form factor chassis. You gain a longer warranty and proven reliability but lose the compact size required for small builds. It suits those who prioritize efficiency and longevity over physical size constraints.
Quick picks
Our 7 picks
SilverStone 700W Platinum SFX-L Power Supply
Best for: quiet, high-efficiency 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
You get a 700W SFX-L power supply built for compact systems needing high electrical efficiency. It delivers 80 PLUS Platinum efficiency and uses a 120mm fan with semi-fanless operation for lower noise during light loads. The fully modular design includes flexible flat cables and four PCI-E 8/6pin connectors. This unit suits you if you build a small-form-factor PC that accommodates a 5.12-inch casing length.
Pros
- 80 PLUS Platinum efficiency rating
- 120mm fan with semi-fanless operation
- Fully modular flat flexible cables
- Quad PCI-E 8/6pin connectors
Cons
- 5.12-inch length requires SFX-L chassis clearance
- Continuous power capped at 700W
Good fit if
- You need 80 PLUS Platinum efficiency in a compact build.
- You require four PCI-E 8/6pin connectors for your hardware.
- You have clearance for a 5.12-inch long SFX-L case bracket.
Skip if
- You require more than 700W of continuous power.
- You have a strict SFX case that cannot accommodate SFX-L length.
Verdict: SilverStone 700W SFX-L Platinum Power Supply delivers high efficiency and quiet 120mm cooling for small-form-factor builds. Its 5.12-inch SFX-L length requires slightly more clearance than a standard SFX unit.
Corsair RM850e (2025) 850W White
Best for: Standard ATX cases needing PCIe 5.1 support
- Wattage
- 850W
- Efficiency Rating
- Cybenetics Gold
- Modularity
- Fully modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Fan Size
- 120mm
View on Amazon: Corsair RM850e (2025) 850W White Affiliate link
This is a renewed Corsair RM850e power supply in white. It delivers 850 watts of power with an ATX 3.1 standard. The unit features a fully modular design and a 120mm fan. It uses a 12V-2x6 connector for modern graphics cards. You get Cybenetics Gold efficiency certification. This model suits users who want a standard ATX size with high efficiency and clean white aesthetics.
Pros
- 850W output capacity
- ATX 3.1 and PCIe 5.1 support
- Fully modular cable design
- 12V-2x6 connector included
- Cybenetics Gold efficiency rating
Cons
- Standard ATX form factor is bulkier than the SFX units on this list
- Renewed condition rather than new retail stock
- Heavier at 3.37 pounds compared to smaller SFX alternatives
Good fit if
- You need a standard ATX size for a full tower case
- You want a white color scheme for your build
- You require PCIe 5.1 compatibility for new GPUs
Skip if
- You are building in a small form factor case
- You strictly require a new unit rather than renewed
- You need more than 850W of power
Verdict: Corsair RM850e 850W White ATX is a solid choice for standard ATX cases where you need PCIe 5.1 support. It fits users who prioritize efficiency and modular cabling over compact dimensions.
SilverStone 700W SFX 80 Plus Gold Power Supply
Best for: compact cases needing quiet, efficient power
- Wattage
- 700W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Fully Modular
- Fan Size
- 92mm
- Form Factor
- SFX
- Dimensions
- 4.92 × 3.94 × 2.5 inches
View on Amazon: SilverStone 700W SFX 80 Plus Gold Power Supply Affiliate link
This SilverStone unit delivers 700W of power in a compact SFX form factor. It features a 92mm fan for silent operation at 18 dBA and holds an 80 PLUS Gold efficiency rating. The fully modular design uses flexible flat cables. It suits users needing reliable power for small cases who prioritize quiet performance and high efficiency over maximum wattage.
Pros
- 80 PLUS Gold efficiency rating
- Fully modular cable design
- Silent 92mm FDB fan with 18 dBA minimum
- Strict 3% voltage regulation
Cons
- 700W output is lower than 750W and 850W alternatives
- 92mm fan is smaller than the 120mm fan in the top pick
- SFX form factor limits compatibility with ATX mounting holes
Good fit if
- You need a fully modular PSU for a small form factor case
- You prioritize silent operation with a 92mm fan
- You want 80 PLUS Gold efficiency in a compact size
Skip if
- You require more than 700W of power
- You prefer a larger 120mm fan for airflow
- You are building a standard ATX case
Verdict: SilverStone 700W SFX Gold PSU offers efficient, quiet power for compact builds. It fits users who need reliable performance in small cases without needing higher wattage options.
SilverStone SX750 750W SFX Platinum PSU
Best for: compact high-efficiency builds
- Wattage
- 750W
- Efficiency Rating
- 80 PLUS Platinum
- Modularity
- Fully Modular
- Fan Size
- 92mm
- Form Factor
- SFX
- Dimensions
- 10 × 8 × 4 inches
View on Amazon: SilverStone SX750 750W SFX Platinum PSU Affiliate link
This SilverStone unit delivers 750W in a standard SFX form factor. It carries an 80 PLUS Platinum efficiency rating and uses all Japanese capacitors. The fully modular design includes flexible flat cables. A 92mm dual ball bearing fan runs silently based on load. This power supply suits users who need high efficiency and compact dimensions for their build.
Pros
- 80 PLUS Platinum efficiency rating
- 750W continuous power output
- Fully modular cable design
- All Japanese capacitors for reliability
Cons
- 92mm fan is smaller than the 120mm fans found on other list items
- 750W capacity is lower than the 850W and 1000W options available
- Standard SFX size is bulkier than the SFX-L form factor used by competitors
Good fit if
- You need high efficiency in a compact SFX case
- You want fully modular cables for clean builds
- You prefer a 750W power supply over higher wattage options
Skip if
- You require an SFX-L form factor for extra space
- You need more than 750W of power
- You prefer a larger 120mm fan for silence
Verdict: SilverStone 750W SFX Platinum PSU offers strong efficiency in a compact standard SFX chassis. It fits users who prioritize high efficiency and modularity over the larger sizes or higher wattages of other picks.
SilverStone 1000W SFX-L Platinum PSU
Best for: high-wattage small form factor builds
- Wattage
- 1000W
- Efficiency Rating
- 80 PLUS Platinum
- Modularity
- Fully Modular
- Fan Size
- 120mm
- Form Factor
- SFX
- Dimensions
- 5.12 × 4.92 × 2.5 inches
View on Amazon: SilverStone 1000W SFX-L Platinum PSU Affiliate link
This SilverStone unit delivers 1000W of continuous power in a compact SFX-L form factor. It holds 80 PLUS Platinum certification for high efficiency. The design features a 120mm fan that supports semi-fanless operation. You get fully modular cables and strict voltage regulation. This power supply suits builders who need maximum wattage in a small chassis.
Pros
- 1000W continuous power output
- 80 PLUS Platinum efficiency rating
- SFX-L form factor fits small cases
- 120mm fan with semi-fanless mode
- Fully modular cable design
Cons
- Heavier at 5.75 pounds than lighter alternatives
- SFX-L height is taller than standard SFX units
- Single +12V rail limits multi-rail flexibility
Good fit if
- You need 1000W in a small form factor PC
- You want high efficiency for lower heat output
- You prefer a fan that stays silent at low loads
Skip if
- You require a standard ATX size
- You need multi-rail +12V outputs
- You want the lightest possible power supply
Verdict: SilverStone SX1000 Platinum 1000W SFX-L fits users who demand high wattage in a compact build. It offers excellent efficiency and quiet operation for small form factor systems.
EVGA SuperNOVA 850 GM SFX Power Supply
Best for: Small cases needing 850W power
- Wattage
- 850W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Fully Modular
- Warranty
- 10 Year
- Form Factor
- SFX
- Dimensions
- 4.92 × 4.92 × 2.48 inches
View on Amazon: EVGA SuperNOVA 850 GM SFX Power Supply Affiliate link
This EVGA unit delivers 850W of power in an SFX form factor. It features fully modular cabling and 80 PLUS Gold efficiency. The build uses 100% Japanese capacitors for reliability. A 10-year warranty covers the hardware. It supports ECO Mode and includes an FDB fan. You get a bracket to fit ATX cases. This pick suits users needing high wattage in a small space.
Pros
- 850W output capacity
- 10-year warranty coverage
- Fully modular cable design
- 80 PLUS Gold efficiency rating
- Includes ATX mounting bracket
Cons
- SFX dimensions are smaller than standard ATX units
- 80 PLUS Gold efficiency is lower than Platinum options on this list
- Weight is 4 pounds, which is heavier than some competitors
Good fit if
- You need 850W in an SFX case
- You want a 10-year warranty
- You prefer fully modular cabling
Skip if
- You require Platinum efficiency
- You need more than 850W
- You prefer a standard ATX form factor
Verdict: EVGA SuperNOVA 850 GM 850W Gold SFX offers strong power density and a long warranty. It fits small builds that need reliable 850W output.
SilverStone 750W Platinum SFX PSU
Best for: compact builds needing high efficiency SFX power
- 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 power supply delivers 750W of output with 80 PLUS Platinum efficiency in a standard SFX form factor. It includes fully modular cabling and all Japanese capacitors within dimensions of 4.92 by 2.5 by 3.94 inches. A 92mm dual ball bearing fan handles cooling with an automatic start-stop mode tied to load and temperature. It suits you if you want high efficiency inside a compact build.
Pros
- 80 PLUS Platinum certified efficiency
- Fully modular cable design
- 92mm dual ball bearing fan with auto start-stop
- All Japanese capacitors
Cons
- Smaller 92mm fan compared to SFX-L units
- 750W output limit for high-draw systems
Good fit if
- You need 750W capacity with 80 PLUS Platinum efficiency.
- You require a standard SFX depth to fit tight chassis clearances.
- You want fully modular cables to simplify small-case cable routing.
Skip if
- You require more than 750W of power for your components.
- You prefer a larger 120mm fan found on SFX-L alternatives.
Verdict: SilverStone SX750 Platinum 750W SFX PSU delivers high efficiency and 750W of power within standard SFX dimensions. Its fully modular design and auto start-stop 92mm fan make it a solid choice for space-constrained systems.
Specifications side by side
| Spec | SilverStone 700W Platinum SFX-L Power Supply | Corsair RM850e (2025) 850W White | SilverStone 700W SFX 80 Plus Gold Power Supply | SilverStone SX750 750W SFX Platinum PSU | SilverStone 1000W SFX-L Platinum PSU | EVGA SuperNOVA 850 GM SFX Power Supply | SilverStone 750W Platinum SFX PSU |
|---|---|---|---|---|---|---|---|
| Wattage | 700W | 850W | 700W | 750W | 1000W | 850W | 750W |
| Efficiency Rating | 80 PLUS Platinum | Cybenetics Gold | 80 PLUS Gold | 80 PLUS Platinum | 80 PLUS Platinum | 80 PLUS Gold | 80 Plus Platinum |
| Modularity | Fully Modular | Fully modular | Fully Modular | Fully Modular | Fully Modular | Fully Modular | Fully Modular |
| ATX Version | not stated | ATX 3.1 | not stated | not stated | not stated | not stated | not stated |
| PCIe Connector Type | PCI-E 8/6pin | 12V-2x6 | not stated | not stated | not stated | not stated | not stated |
| Fan Size | 120mm | 120mm | 92mm | 92mm | 120mm | not stated | 92mm |
| Warranty | not stated | not stated | not stated | not stated | not stated | 10 Year | not stated |
| Form Factor | SFX | ATX | SFX | SFX | SFX | SFX | SFX |
| PCIe Version | not stated | PCIe 5.1 | not stated | not stated | not stated | not stated | not stated |
| Connector | not stated | 12V-2x6 Connector | not stated | not stated | not stated | not stated | not stated |
| Size | 700W SFX12V | 850 W | 700W | not stated | not stated | 850W | 750W |
| Dimensions | 5.12 × 4.92 × 2.5 inches | 5.91 × 5.51 × 3.35 inches | 4.92 × 3.94 × 2.5 inches | 10 × 8 × 4 inches | 5.12 × 4.92 × 2.5 inches | 4.92 × 4.92 × 2.48 inches | 3.94 × 4.92 × 2.5 inches |
| Weight | 5.07 pounds | 3.37 pounds | 3.09 pounds | 4.47 pounds | 5.75 pounds | 4 pounds | not stated |
| Model | SST-SX700-LPT | not stated | SST-SX700-G | SX750-PT | PS-SX1000-LPT | 123-GM-0850-X1 | PS-SX750-PT-X |
| Color | not stated | White | Black?Lead-Free Paint? | not stated | not stated | not stated | not stated |
If you need a compact cooler for your system, you can compare silverstone sst ar06 alternatives.
Frequently asked questions
Is the Corsair RM850e compatible with my current motherboard?
The Corsair RM850e uses an ATX form factor, which differs from the SFX size of your current unit. It supports ATX 3.1 and PCIe 5.1 standards. This makes it suitable for standard ATX cases rather than compact SFX builds. You need a case that accommodates its 5.91-inch length and 5.51-inch width.
Which alternative offers the highest efficiency rating?
Several options provide 80 PLUS Platinum efficiency, including the SilverStone SX750-PT and the 1000W SFX-L model. These units convert more electricity into usable power with less waste heat. The SilverStone 700W Platinum SFX-L also holds this top-tier rating. You gain better energy savings in high-load scenarios with any of these platinum-certified choices.
Can I fit an SFX-L power supply in a standard SFX case?
You generally cannot fit an SFX-L unit into a case designed strictly for standard SFX dimensions. The SilverStone 700W Platinum SFX-L measures 5.12 inches in length, which exceeds typical SFX constraints. You should verify your case specifications carefully. If your case is tight, consider the shorter 3.94-inch SilverStone SX750 Platinum instead.
Does the EVGA SuperNOVA 850 GM support modern GPU connectors?
The provided data does not list specific connector versions for the EVGA SuperNOVA 850 GM. It offers 850W of power in an 80 PLUS Gold efficiency class. It is fully modular and fits in standard SFX cases. You should check the manufacturer specifications for PCIe 5.1 or 12V-2x6 connector support before purchasing.
Is there a fully modular option with a smaller footprint than the original?
Yes, the SilverStone 750W Platinum SFX PSU is fully modular and shorter than the original. It measures 3.94 inches in length compared to the 5.12 inches of the SST-SX700-LPT. This compact design helps in space-constrained systems. You get 750W of power in a standard SFX chassis with auto start-stop fan technology.
Which power supply is best for high-wattage small form factor builds?
The SilverStone 1000W SFX-L Platinum PSU is designed for high-wattage needs in compact builds. It delivers 1000W of continuous power while maintaining an 80 PLUS Platinum efficiency rating. Its SFX-L form factor fits small cases that require more than 700W. You get quiet operation and excellent efficiency for demanding systems.
Does the SilverStone 700W Gold unit match the Platinum version's size?
The SilverStone 700W SFX Gold unit is slightly shorter than the Platinum SFX-L version. It measures 4.92 inches in length, whereas the Platinum SFX-L is 5.12 inches long. Both share the same 3.94-inch width and 2.5-inch height. You save a small amount of depth with the Gold model while retaining fully modular cabling.