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SilverStone SX750 Platinum SFX Power Supply Review

The SilverStone SX750 is one of the strongest SFX power supplies.

Silverstone SX750 Platinum
(Image: © Tom's Hardware)

Our Verdict

SilverStone managed to meet Corsair and release an equally strong SFX power supply, with 750W output power. But the SX750 Platinum isn't as good an overall performer as Corsair's SF750 Platinum.

For

  • + Full power at 47 degrees Celsius
  • + High power density
  • + High build quality
  • + Good enough transient response at 12V
  • + Highly efficient 5VSB rail
  • + 3x EPS and 4x PCIe connectors
  • + Fully modular

Against

  • - Noisy under high loads
  • - Expected higher efficiency levels
  • - Not tight load regulation on the minor rails
  • - Low hold-up time
  • - No OTP
  • - High turn-on 5VSB voltage
  • - Long Power-On time (>150ms)

Tom's Hardware Verdict

SilverStone managed to meet Corsair and release an equally strong SFX power supply, with 750W output power. But the SX750 Platinum isn't as good an overall performer as Corsair's SF750 Platinum.

Pros

  • + + Full power at 47 degrees Celsius
  • + + High power density
  • + + High build quality
  • + + Good enough transient response at 12V
  • + + Highly efficient 5VSB rail
  • + + 3x EPS and 4x PCIe connectors
  • + + Fully modular
  • +

Cons

  • - - Noisy under high loads
  • - - Expected higher efficiency levels
  • - - Not tight load regulation on the minor rails
  • - - Low hold-up time
  • - - No OTP
  • - - High turn-on 5VSB voltage
  • - - Long Power-On time (>150ms)
  • -

The SilverStone SX750 has an extremely high power density, meeting the rival Corsair SF750, but it cannot achieve the same performance levels. In fact, the overall performance difference between the SX750 and the SF750 reaches 13%, favoring the Corsair unit. Therefore, SilverStone needs to make several changes in this PSU to increase its performance and make it competitive enough to be on our list of the best power supplies, replacing the Corsair SF750 in the best SFX PSU category. 

The SilverStone SX750 is among the strongest SFX units, along with the Corsair SF750 and the Cooler Master V850 SFX Gold. However, delivering so much power out of a tiny SFX platform is tough, especially after high performance. There is no room on the small PCB for extra ripple filtering capacitors and the parts are cramped, so airflow isn't exactly optimal. In other words, you should not expect compact and high power density PSUs to be quiet under stressful conditions (e.g., high loads and increased operating temperatures). 

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SilverStone SX750

(Image credit: Tom's Hardware)

Product Photos

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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The SX750 Platinum is fully modular, providing loads of cables and connectors to deliver maximum power. The OEM is Enhance Electronics, which has vast experience in making compact and powerful platforms. At the internals, Japanese caps are exclusively used to increase reliability. The cooling fan, measuring 92mm across, uses a double ball bearing that will easily cope under high operating temperatures. Fluid dynamic bearing fans might produce lower noise output, but their life is vastly shortened under high operating temperatures (>40 degrees Celsius), which doesn't affect DBB fans. 

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SilverStone SX750

(Image credit: Tom's Hardware)

Product Photos

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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Specifications

Manufacturer (OEM)

Enhance Electronics

Max. DC Output

750W

Efficiency80 PLUS Platinum, Cybenetics Platinum

Noise

Cybenetics Standard+ (35-40 dB[A])

Modular

✓ (fully)

Intel C6/C7 Power State Support

Operating Temperature (Continuous Full Load)

0 - 40°C

Over Voltage Protection

Under Voltage Protection

Over Power Protection

Over Current (+12V) Protection

Over Temperature Protection

Short Circuit Protection

Surge Protection

Inrush Current Protection

Fan Failure Protection

No Load Operation

Cooling

92mm Double Ball Bearing Fan (B0921512HB)

Semi-Passive Operation

Dimensions (W x H x D)

125 x 65 x 100mm

Weight

1 kg (2.2 lb)

Form Factor

SFX, EPS 2.92

Warranty

5 Years

Power Specifications

Rail3.3V5V12V5VSB-12V
Max. PowerAmps202062.530.3
Watts120750153.6
Total Max. Power (W)750

Cables & Connectors

DescriptionCable CountConnector Count (Total)GaugeIn Cable Capacitors
ATX connector 20+4 pin (300mm)1116-22AWGNo
4+4 pin EPS12V (410mm)1116AWGNo
8 pin EPS12V (410mm) / 4+4 pin EPS12V (150mm)11 / 116-18AWGNo
6+2 pin PCIe (410mm+150mm)2416-18AWGNo
SATA (310mm+195mm+95mm+95mm)2818AWGNo
4-pin Molex (310mm+195mm+195mm) / FDD (+100mm)13 / 118-22AWGNo
AC Power Cord (1370mm) - C13 coupler1118AWG-

There are two cables with EPS connectors, and according to your needs, you will use either of them. Unfortunately, there are only three sockets for the EPS and PCIe cables, so you will have to choose between the single EPS or the double EPS cable unless you use only one PCIe cable. We advise against using the cable with two EPS connectors installed on mainboards with high power consumption. 

All cables are short since this PSU is destined for small chassis, but the distance between the 4-pin Molex connectors is large at 195mm. Silverstone also provided an FDD connector, which is not required by the majority of users. It would be better if they provided an additional 4-pin Molex connector instead. 

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SilverStone SX750

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Cable Photos

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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Component Analysis

We strongly encourage you to have a look at our PSUs 101 article, which provides valuable information about PSUs and their operation, allowing you to better understand the components we're about to discuss.

General Data-
Manufacturer (OEM)Enhance Electronics
PCB TypeDouble Sided
Primary Side-
Transient Filter6x Y caps, 3x X caps, 2x CM chokes, 1x MOV
Inrush ProtectionNTC Thermistor SCK202R0 (2 Ohm)
Bridge Rectifier(s)
1x
APFC MOSFETs
2x Toshiba TK39A60W (600V, 38.8A, Rds(on): 0.065Ohm)
APFC Boost Diode
1x UnitedSiC UJ3D06516TS (650V, 16A @ 152°C)
Bulk Cap(s)
1x Rybycon (420V, 470uF, 3,000h @ 105°C, MXK)
Main Switchers
4x Oriental Semiconductor OSG55R140F (550V, 14.5A @ 100°C, Rds(on): 0.14Ohm)

IC Driver

2x Silicon Labs Si8230BD

APFC Controller
ATK AT6101ZS & CM03X
Resonant ControllerChampion CM6901T6
Topology
Primary side: APFC, Full-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side-
+12V MOSFETs6x Infineon BSC014N04LS (40V, 125A @ 100°C, Rds(on): 1.4mOhm)
5V & 3.3VDC-DC Converters: 4x UBIQ QN3109M6N (30V, 97A @ 100°C, Rds(on): 1.5mOhm)
PWM Controller(s): ANPEC APW7159C
Filtering CapacitorsElectrolytic: 4x Nippon Chemi-Con (4-10,000h @ 105°C, KY) Polymer: 4x FPCAP, 19x Unicon
Supervisor ICWeltrend WT7527RA (OCP,OVP, UVP, SCP, PG)
Fan ModelGlobe Fan B0921512HB (92mm, 12V, 0.45A, Double Ball Bearing Fan)
5VSB Circuit-
Rectifier
1x PFR10V45CT SBR (45V, 10A) & 1x IPS ITU02N70A FET
Standby PWM ControllerATK AT6002H
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SilverStone SX750

(Image credit: Tom's Hardware)

Overall Photos

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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The large primary heat sink with the long fins is the first indication that Enhance Electronics make this platform. Some OEMs have a distinctive heat sink design. and Enhance is one of them. 

As expected, the platform is densely populated. There are no heat sinks on the secondary side since the FETs that regulate the 12V rail are on the solder side of the PCB. Nevertheless, the design is modern, and Enhance did its best to find space to install all necessary parts (check in the photos above the X caps of the EMI filter, which are on top of the CM chokes).  

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SilverStone SX750

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Transient filter

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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The transient/EMI filter has more than the necessary components, including six Y and three X caps. 

SilverStone SX750

(Image credit: Tom's Hardware)

The single bridge rectifier is bolted on a dedicated heat sink, and there is no way to identify it without desoldering, which we avoided in this case. 

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SilverStone SX750

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APFC converter

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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The APFC converter uses two Toshiba FETs and a single boost diode, which is powerful. However, the bulk cap is by Rubycon, and although it is of top quality, its capacity isn't large enough to allow for close to 17ms hold-up time.

The APFC controller is an ATK AT6101ZS which a CM03X IC supports for lower vampire power. 

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SilverStone SX750

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Main FETs and primary transformer

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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The four main FETs are installed in a full-bridge topology, and they are handled by a pair of Silicon Labs driver ICs. 

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SilverStone SX750

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12V FETs and VRMs

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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Six FETs generate the 12V rail. The minor rails, 5V and 3.3V, are regulated by a pair of DC-DC converters.

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SilverStone SX750

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Filtering caps

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SilverStone SX750

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SilverStone SX750

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There are few electrolytic caps provided by Chemi-Con, on the secondary side because there is not much space available. On the other hand, Enhance installed many polymer caps by Unicon and FPCAP. 

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SilverStone SX750

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5VSB Circuit

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SilverStone SX750

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SilverStone SX750

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The 5VSB rail uses a PFR10V45CT SBR on its secondary side and an ITU02N70A FET on its primary side. The PWM controller is an ATK AT6002H.

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SilverStone SX750

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Modular board front

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SilverStone SX750

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SilverStone SX750

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At the face of the modular board, Enhance installed several polymer caps to lower ripple. 

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SilverStone SX750

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Soldering quality

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SilverStone SX750

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SilverStone SX750

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SilverStone SX750

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There are some solder joints with an excess amount of solder, but soldering quality is satisfactory in general. 

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SilverStone SX750

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Cooling fan

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SilverStone SX750

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The cooling fan measures 92mm across and uses a double ball bearing. This is a quality fan, which will easily outlive the five-year warranty that supports the SX750. 

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Aris Mpitziopoulos
Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.
  • RYANFSS
    Is this review based on v1.1 model or 1.0?
    Reply
  • solrac0192
    RYANFSS said:
    Is this review based on v1.1 model or 1.0?
    This is for 1.1 Model based on the fifth image:
    https://cdn.mos.cms.futurecdn.net/tLnQZkRbv4r546DVRoo3ub-970-80.jpg.webp
    Reply