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SilverStone ST45SF 450W SFX12V 80 PLUS BRONZE Certified Active PFC Power Supply

Ships from United States. Most customers receive within 3-8 days.

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  • SFX12V
  • 80 PLUS BRONZE Certified
  • 90 - 265V 47 - 63 Hz

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

 

SFX Series ST45SF 450W Power Supply

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After successfully revolutionizing both HTPC and SFF market segments with innovative chassis designs, SilverStone engineers continue their push for advancement in these categories by releasing a truly upgrade-worthy small form-factor power supply: the ST45SF. This SFX unit is compatible not only with chassis that use SFX power supplies but also in smaller ATX chassis with the included adapter bracket.

Despite its small size, the ST45SF has features that one would expect from an elite ATX power supply - such as 80 PLUS Bronze level of efficiency, temperature controlled fan, 50-degree temperature rating, and reliability for 24/7 operation. Enthusiast-oriented features are also present with single +12V rail and 8-pin / 6-pin PCI-E connectors to fully support multi-GPU systems. For SFF users and for SilverStone, the ST45SF is more than just an upgrade - it is an important milestone for the DIY desktop computer.

 

Key Features

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  • Supports standard SFX form factors and ATX via included bracket
  • 450W continuous power output at 122°F (50°C) operating temperature rated for 24/7 operation
  • 80 PLUS Bronze level efficiency (82 - 85% efficiency at 20 - 100% load)
  • Class-leading single +12V rail with 36A
  • Silent running 80mm fan with 18dBA minimum
  • Single PCI-E 8-pin and dual PCI-E 6-pin connectors support
  • Active PFC

Details

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80 PLUS Bronze certified to reduce wasted heat and save on electricity

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Built-in 80mm fan has excellent airflow and low noise, perfect for quiet home or office use

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Powerful single +12V rail design, perfect for future high-end component upgrade

feature_04

Included SFX to ATX bracket for use in ATX case

Dimensions

Dimensions

What's in the Box

What's in the Box

 


Learn more about the Silverstone ST45SF

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details
Ownership: less than 1 day
Verified Owner
4/ 5
Exact Replacement Bestec atx100-5 PSU

Pros: Size Information was correct - Replaces a 20+ Year old Bestec ATX 100-5 (MATX) PSU in an older HP M-ATX Case - Socket 370 Pentium/Celeron system. Don't know if it works yet or how well it'll power an Athlon x4 640 and GTX 750

Cons: n/a

Overall Review: Purchased this to update a very solid HP M-ATX Case with a M-ATX PSU so I'm quite happy that the size information was correct and when compared against the PSU it's replacing - exact same size.

Did you find this review helpful?
Ownership: 1 week to 1 month
Verified Owner
1/ 5
Huge Letdown

Pros: Fit very nicely in the micro case. Looks sleek and professional. Unfortunate as the Con rendered fit completely moot.

Cons: This power supply DID NOT WORK, right out of the box. It would not power up at all, not even the fan. So much for "Bronze" status. Their Quality Assurance team really dropped the ball on this one.

0 out of 5 people found this review helpful. Did you?
Ownership: 1 week to 1 month
Verified Owner
4/ 5
Does what I need

Pros: - very quiet
- braiding is quality on connections
- price is good
- very compact size for SFX 450w supply

Cons: - wish there was 1 or 2 more sata connectors
- nothing else really

Overall Review: Price is good, fit the case i am using (silverstone DS380) and is quiet, for now. I have only had the unit for about 1-2 weeks so we will see how it holds up long term. but so far so good.

1 out of 1 people found this review helpful. Did you?
Ownership: 1 month to 1 year
Verified Owner
4/ 5
ST45SF 450W

Pros: This is an 80 Plus Bronze Rated PSU.
SFX Form factor so it fits nicely in the Silverstone Raven case which I am currently using (RVZ02B).
Has some black wire mesh around cable groups.
Comes with screws and an additional plate that can be used to mount it where only standard ATX power supplies are supported.

Cons: Loud. The fan used to cool the supply is small and as such has to spin at a faster speed than the 120mm fan on the SFX-L version.
Price per watt leaves something to be desired.

Overall Review: You almost always pay a premium for compact components.
I expected this going in.
Still knowing this I wish it offered more for the price. Either being modular, have flat cables, or be 500w Plus Bronze rated.
I am aware that there is a 500w variant it however is more costly and is gold rated and offers additional features.

This currently powers without issue:
EVGA GTX 960,
Intel Xeon 1231V3 processor
1x Mushkin 120GB SSD
1x Western Digital 2TB Purple HDD
GIGABYTE GA-B85N Phoenix-WIFI Motherboard.

1 out of 1 people found this review helpful. Did you?
Ownership: more than 1 year
Verified Owner
5/ 5
Perfect size, power, and price!

Pros: Small Form Factor
Quiet
Efficient
Affordable

Cons: none

Overall Review: ideal for HTPC installations

1 out of 1 people found this review helpful. Did you?
Ownership: more than 1 year
5/ 5
Perfect size, power, and price!

Pros: Small Form Factor
Quiet
Efficient
Affordable

Cons: none

Overall Review: Even with very few options for power supplies this size (SFF), the price is perfect and provides enough power for an HTPC or even a Low-Mid Level Game Rig for your living room. Combined with the Silverstone Milo series Case, it's a perfect match. I did a review on the Silverstone Milo case as well, but have since updated the hardware... This is my setup

Case - ML07B Case
PSU - ST45SF 450W Power Supply
Motherboard - ECS Mini-ITX H61H2-I
Processor - Intel Core i5-2500
Memory - 2x2GB DDR3 1333
SSD - PNY 120GB SATAIII
HDD - Seagate 7200.12 160GB 2.5"
Optical - Slim slot-load DVD+-RW
Video - NVidia GTX 560 Ti
3 case fans

No problems supplying power even when under full load gaming. Although, in the interest of preserving the life of the power supply, I am replacing the GTX 560 Ti with a GTX 750 Ti... Same performance, but much less power consumption.

Many people might complain that this PSU is "not" modular... My thoughts on that...
First - there is a modular variant, but of course you have to pay extra for "features", so it should not be listed as a "con".
Second - Modular PSU's are good and bad... sure you only need to connect the number of lines that are necessary... but if you need to use most of the connections, it gets just as crowded in your case as bundling the remaining wires from a standard PSU because now you have a thick array of wires coming out of your PSU, instead of a tightly bundled group...
I think Modular PSU's are great... if you actually only use 1-3 power leads... anything beyond that and you've wasted your money, imho... just save some bucks, get a standard PSU of the same rating, and tuck your extra wires away neatly.

5 out of 6 people found this review helpful. Did you?
Ownership: 1 week to 1 month
Verified Owner
5/ 5
Works as expected

Pros: I purchased this power supply to go in a silverstone sugo and it fit nicely. The fan is super quite. It had adequate connectors for my needs.

Cons: None.

1 out of 1 people found this review helpful. Did you?
Ownership: 1 month to 1 year
2/ 5
Good little PSU but issues with noise

Pros: Nice and compact. Works well.

Cons: Number of issues with the noise. While the fan is reasonably quiet, it whines at times. There is also some issue in my unit where it sounds like something is bouncing off the fan. It makes this annoying clicking noise.

Overall Review: Would be great if Silverstone had better quality control. I have QA issues on an FT03 as well.

I'm told I can ship it back to claim warranty but I can't use a computer without a PSU... They don't offer advanced warranty.

1 out of 2 people found this review helpful. Did you?
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