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SilverStone Technology 450W SFX Form Factor 80 Plus Bronze Power Supply (ST45SF-V3)

4.4 4.4 out of 5 stars 259 ratings

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450W
SFX Fixed Cables Bronze 92MM Fan

Purchase options and add-ons


About this item

  • Supports standard SFX form Factor and ATX via included bracket
  • 450W continuous power output at 50℃ operating temperature rated for 24/7 operation
  • 80 plus Bronze level efficiency (82%85% efficiency at 20%100% loading)
  • Class-leading single +12V rail
  • Silent running 92mm fan (V3.0)
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SilverStone Technology 450W SFX Form Factor 80 Plus Bronze Power Supply (ST45SF-V3)
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Price$104.65$99.99$124.67$64.61-33% $39.99
List:$59.99
$107.99
Delivery
Get it Mar 25 - 27
Get it as soon as Wednesday, Mar 27
Get it Apr 4 - 9
Get it as soon as Tuesday, Mar 26
Get it as soon as Monday, Mar 25
Get it as soon as Monday, Mar 25
Customer Ratings
Noise level
4.3
4.8
3.7
4.5
4.6
Quality of material
4.1
4.0
4.8
4.8
3.8
Value for money
3.6
4.6
4.8
3.9
Easy to install
4.5
4.4
4.3
4.8
Sold By
VirVentures
Amazon.com
Triplenet Pricing INC
Amazon.com
ARESGAME TECH
Amazon.com
power supply design
Full Modular
Non-Modular
Full Modular
connector type
atx,pci-e
atx,pci-e
SATA
ATX
ATX
form factor
Atx,Sfx
Atx,Sfx
SFX
ATX
ATX
SFX
cooling method
Air
Air
Air
Air
Air
min input voltage
115 volts
12 volts
100 volts
system bus connector
8pin/6pin
6pin,8pin
20-pin,6-pin
fan count
1
1
1
1
1

What's in the box

  • ST45SF Power Supply
  • User Manual
  • SFX to ATX Bracket
  • Screws

  • From the manufacturer

    SilverStone Technology 450W SFX Form Factor 80 Plus Bronze Power Supply (ST45SF-V3)

    • Supports standard SFX form factor and ATX via included bracket
    • 450W continuous power output at 50℃ temperature rated for 24/7 operation (V2.0)
    • 450W continuous power output at 40℃ temperature rated for 24/7 operation (V3.0)
    • 80 PLUS Bronze level efficiency (82%~85% efficiency at 20%~100% loading)
    • Single +12V rail with 36A
    • Silent running 80mm fan (V2.0)
    • Silent running 92mm fan (V3.0)
    • Single PCI-E 8pin and dual PCI-E 6pin connectors support
    • Active PFC

    Product information

    Technical Details

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    Additional Information

    Warranty & Support

    Amazon.com Return Policy:You may return any new computer purchased from Amazon.com that is "dead on arrival," arrives in damaged condition, or is still in unopened boxes, for a full refund within 30 days of purchase. Amazon.com reserves the right to test "dead on arrival" returns and impose a customer fee equal to 15 percent of the product sales price if the customer misrepresents the condition of the product. Any returned computer that is damaged through customer misuse, is missing parts, or is in unsellable condition due to customer tampering will result in the customer being charged a higher restocking fee based on the condition of the product. Amazon.com will not accept returns of any desktop or notebook computer more than 30 days after you receive the shipment. New, used, and refurbished products purchased from Marketplace vendors are subject to the returns policy of the individual vendor.
    Product Warranty: For warranty information about this product, please click here

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    Product Description

    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 true 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℃ temperature rating, and reliability for 24/7 operation. Enthusiasts oriented features are also present with single +12V rail and 8pin/6pin 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.

    Customer reviews

    4.4 out of 5 stars
    4.4 out of 5
    259 global ratings

    Customers say

    Customers like the quality, performance, and fit of the power supply. For example, they mention it's quiet, works well, and fits perfectly into small cases. Customers are also impresseded with the cables, saying they're sleeved and netted for protection.

    AI-generated from the text of customer reviews

    60 customers mention48 positive12 negative

    Customers like the noise of the system power device. They mention that the fan is hardly audible when idle, and the PSU runs quietly. Some say that the product is solid and has good weight.

    "...It's solid and quiet. The only thing that's kind of janky is the color of the adapter plate, which I'm guessing most purchasers won't use, anyway...." Read more

    "...The intelligent fan control means that it is 100% silent (as far as I can tell) 100% of the time...." Read more

    "...The cooling fan is very quiet - you almost cannot hear it. Works well for my use." Read more

    "...The noise level is superb. I approximate I have used up to 150 watts and have not heard the fan at all...." Read more

    52 customers mention44 positive8 negative

    Customers like the quality of the power supply. They say it's very well built, has a quiet fan, and the cables and connectors are of good quality. Some say that it'll last a long time and never fail. Overall, most are happy with their purchase and recommend it to others.

    "...recommend this power supply to anyone who wants something to last a long time and never fail." Read more

    "...It's solid and quiet. The only thing that's kind of janky is the color of the adapter plate, which I'm guessing most purchasers won't use, anyway...." Read more

    "...What a difference! Apart from being compact, the build quality is excellent, all cables braided and (quite important for mini ITX) not too long, so..." Read more

    "When this unit is running I have no issues with build quality, brand, or power quality, but that is when it is actually running...." Read more

    42 customers mention31 positive11 negative

    Customers like the performance of the power supply. They say it works well, quiet, and is efficient. Some mention that it works great with low-power builds as well as higher power ones, and that it runs without any issues.

    "TL:DR: worked great for years, highly recommend..." Read more

    "...Worked flawlessly out of the box. I debated whether to get this or the (cheaper) FSP 400W unit...." Read more

    "...The cooling fan is very quiet - you almost cannot hear it. Works well for my use." Read more

    "...sometimes it wont even turn back on. i paid 149$ at the time for it." Read more

    20 customers mention16 positive4 negative

    Customers like the fit of the system power device. They mention that it fits perfectly into their SFF case and is a great fit for their ITX build. Some say that the power supply is small, quiet, and efficient. Overall, most are satisfied with the fit and functionality of the product.

    "...What a difference! Apart from being compact, the build quality is excellent, all cables braided and (quite important for mini ITX) not too long, so..." Read more

    "Power supply fit perfectly in an ITX case. The power supply also comes with an adapter to use it in an ATX case as well...." Read more

    "I installed this PSU in my home theater machine and it fit perfectly. I used the included adapter plate to mount this in a full size ATX case...." Read more

    "...This, however, was the right supply both in power and in size. It fits perfectly and the cables are nice and netted for protection in my small case..." Read more

    15 customers mention15 positive0 negative

    Customers like the cables. They say the cables are sleeved, netted, and decently braided. They also say the cable length is long enough to reach their destinations and the connections are good. Customers also mention that the cables have thick yet easy to move around in.

    "...This supply has some nice features as well such as a PCIe cable for video cards (not all SFX supplies include this) plus an ATX adapter plate for..." Read more

    "...Apart from being compact, the build quality is excellent, all cables braided and (quite important for mini ITX) not too long, so easier to manage..." Read more

    "...PSU comes with a nice set of thumbscrews, an adapter bracket, and sleeved cables. Everything one would expect from Silverstone...." Read more

    "...Being non-modular is not a problem since it is possible to use every cable that is provided...." Read more

    8 customers mention8 positive0 negative

    Customers are satisfied with the connectivity of the system power device. They mention that it has all the right connectors, the wires are thick yet easy to move around in small spaces, and the power connectors are nicely spaced on the cables.

    "...quiet, has a nice black case with mostly sleeved cables and has a 6pin pci-e connector (if I ever need it). All in all, a great purchase so far." Read more

    "...Connections are good, and wires are thick yet easy to move around in small cases...." Read more

    "...Fan is very quiet. Build quality looks excellent. Power connectors are nicely spaced on the cables...." Read more

    "Excellent power supply.very quite.plenty of connectors.very stable.paired to a Silverstone sg05 case.in my opinion the best small itx case out..." Read more

    7 customers mention7 positive0 negative

    Customers are satisfied with the performance and efficiency of the system power device. They mention that it is very efficient, has great performance, and is very fast.

    "...During light loads, the fan is off, making it silent and efficient...." Read more

    "...The performance is great, although I had to return the first unit due to a significant buzz sound that is was producing and since I was using it on..." Read more

    "This power supply functions very well. Its near inaudible and is very efficient. My only gripe with this power supply is the cables...." Read more

    "good quality, fast shipping, now to see how long it lasts." Read more

    11 customers mention4 positive7 negative

    Customers have mixed opinions about the fan of the system power device. Some like that it has smart fan control, with no fan if not needed, while others say that it never starts to spin, has gone off its rocker, and runs too hot in ITX builds. The fan control is a weakness, with lack of middle ground and no hysteresis in its control.

    "...-type notice on the power supply, warning the user that the PSU fan doesn't always spin, as it's temperature controlled...." Read more

    "...What I like the most is that the fans are always off unless my CPU starts requiring more power, this is a great feature for HTPCs out there and..." Read more

    "...There is no middle ground with the fan, and no hysteresis in its control...." Read more

    "...The fan has gone off its rocker and it's hitting something, probably vital, in my super expensive 5 months old SFF Power Supply...." Read more

    Great, even in a non-SFX build (see details).  Recommended
    4 Stars
    Great, even in a non-SFX build (see details). Recommended
    I'll be honest... I really had no intention of buying a SilverStone Technology 300W SFX Form Factor 80 Plus Bronze Power Supply with +12V Single Rail, Active PFC (ST30SF). The thing is that I was putting together my first mini-ITX build since the Via Eden days. While I wanted a small system, I specifically bought a Cooler Master Elite 110 RC-110-KKN2 so I could use a standard size PSU. The problem was that the CPU placement on the motherboard, combined with the height of the Ryzen 5 3400G's OEM Wraith Spire cooler, and the PSU placement in the case resulted in a pretty small gap between the CPU fan and the PSU. Maybe it would have been fine, but I really just didn't like the idea of half of my heatsink not being able to efficiently shed heat. So, I decided to swap out the OEM cooling unit with a SilverStone Technology RL-KR01. That solved my clearance issue, but it was WAY louder than the stock unit, which didn't really work for me. After a little digging, I decided to get the SilverStone Technology ST30SF, and use the included adapter plate. Theoretically, that would let me go back to the stock cooler.I've had proprietary PSUs before, but not very often... stuff like Shuttles, or microATX builds. I was only vaguely aware of the SFX form factor, but was excited when I found out about adapter plates you could use for a regular ATX PSU mount. The ST30SF wasn't the cheapest option, but it was the lowest cost unit that had a brand I trusted and had the adapter bracket (otherwise you'd have to spend like $10 to get one). As you might imagine, the unit is tiny. The bracket centers the unit within the ATX cavity, so it's not necessarily optimized for clearance, but that wasn't an issue for me. As my build is an R5 3400G, 32GB of RAM, and an NVMe drive on an x4 card, it really doesn't need anything bigger than 300W (it doesn't even need that, really). The build quality of the PSU appears to be up to the level I expect from Silverstone, despite being a lower-priced product. The adapter plate is grey/silver, so you may want to hit it with some spray paint, if you care about aesthetics. The 24 and 8-pin mobo power cables are long enough for whatever small case you may be using.In operation, the PSU can be completely silent. There was a sash-type notice on the power supply, warning the user that the PSU fan doesn't always spin, as it's temperature controlled. Even when it's spinning, the fan isn't that loud. It is a little weird for the sound floor to change that much for a running computer, though. In operation, I didn't have any stability problems, and I had solid 3.3, 5, and 12v line voltages.If you know you're going to stay within a 300w power budget, this power supply is a great choice. It's solid and quiet. The only thing that's kind of janky is the color of the adapter plate, which I'm guessing most purchasers won't use, anyway. Recommended.
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    Top reviews from the United States

    Reviewed in the United States on July 26, 2014
    Size: 300WStyle: SFX Fixed Cables BronzeVerified Purchase
    2 people found this helpful
    Report
    Reviewed in the United States on July 10, 2021
    Size: 300WStyle: TFX BronzeVerified Purchase
    Reviewed in the United States on December 10, 2014
    Size: 300WStyle: SFX Fixed Cables BronzeVerified Purchase
    Customer image
    5.0 out of 5 stars Quietest Power Supply I EVER experienced!
    Reviewed in the United States on December 10, 2014
    I first heard about this small compact PSU when I called Silverstone to ask about their Milo 6 case. I initially told the tech I wanted to use a super-tiny Pico Power Supply for quiet operation and if they had a cover plate for the PSU hole. Mind you, I already had the silent Titan low profile cooler to replace the Intel stock cooler, but my cheap PSU from a ravaged Xion case was disappointing. They suggested I buy their silent Tek 300w SFX PSU. The payoff was superb! The fan inside the PSU does not turn on unless there is a heat build up. Even when the fan does goes on, you cannot hear it unless you are 12 inches away. Do not be put off by the price of this unit... it's worth every penny.. as that every other SFX sized PSU I have used has been NOISY and low quality. Reminder: this is an SFX PSU, not a standard ATX size.
    Images in this review
    Customer image
    Customer image
    9 people found this helpful
    Report
    Reviewed in the United States on February 11, 2020
    Size: 300WStyle: SFX Fixed Cables BronzeVerified Purchase
    Customer image
    4.0 out of 5 stars Great, even in a non-SFX build (see details). Recommended
    Reviewed in the United States on February 11, 2020
    I'll be honest... I really had no intention of buying a SilverStone Technology 300W SFX Form Factor 80 Plus Bronze Power Supply with +12V Single Rail, Active PFC (ST30SF). The thing is that I was putting together my first mini-ITX build since the Via Eden days. While I wanted a small system, I specifically bought a Cooler Master Elite 110 RC-110-KKN2 so I could use a standard size PSU. The problem was that the CPU placement on the motherboard, combined with the height of the Ryzen 5 3400G's OEM Wraith Spire cooler, and the PSU placement in the case resulted in a pretty small gap between the CPU fan and the PSU. Maybe it would have been fine, but I really just didn't like the idea of half of my heatsink not being able to efficiently shed heat. So, I decided to swap out the OEM cooling unit with a SilverStone Technology RL-KR01. That solved my clearance issue, but it was WAY louder than the stock unit, which didn't really work for me. After a little digging, I decided to get the SilverStone Technology ST30SF, and use the included adapter plate. Theoretically, that would let me go back to the stock cooler.

    I've had proprietary PSUs before, but not very often... stuff like Shuttles, or microATX builds. I was only vaguely aware of the SFX form factor, but was excited when I found out about adapter plates you could use for a regular ATX PSU mount. The ST30SF wasn't the cheapest option, but it was the lowest cost unit that had a brand I trusted and had the adapter bracket (otherwise you'd have to spend like $10 to get one). As you might imagine, the unit is tiny. The bracket centers the unit within the ATX cavity, so it's not necessarily optimized for clearance, but that wasn't an issue for me. As my build is an R5 3400G, 32GB of RAM, and an NVMe drive on an x4 card, it really doesn't need anything bigger than 300W (it doesn't even need that, really). The build quality of the PSU appears to be up to the level I expect from Silverstone, despite being a lower-priced product. The adapter plate is grey/silver, so you may want to hit it with some spray paint, if you care about aesthetics. The 24 and 8-pin mobo power cables are long enough for whatever small case you may be using.

    In operation, the PSU can be completely silent. There was a sash-type notice on the power supply, warning the user that the PSU fan doesn't always spin, as it's temperature controlled. Even when it's spinning, the fan isn't that loud. It is a little weird for the sound floor to change that much for a running computer, though. In operation, I didn't have any stability problems, and I had solid 3.3, 5, and 12v line voltages.

    If you know you're going to stay within a 300w power budget, this power supply is a great choice. It's solid and quiet. The only thing that's kind of janky is the color of the adapter plate, which I'm guessing most purchasers won't use, anyway. Recommended.
    Images in this review
    Customer image Customer image Customer image
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    2 people found this helpful
    Report
    Reviewed in the United States on January 30, 2018
    Size: 450WStyle: SFX Fixed Cables Bronze 92MM FanVerified Purchase
    Reviewed in the United States on December 15, 2015
    Size: 300WStyle: SFX Fixed Cables BronzeVerified Purchase
    Reviewed in the United States on February 21, 2019
    Size: 300WStyle: SFX Fixed Cables BronzeVerified Purchase

    Top reviews from other countries

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    Sasha Lu
    5.0 out of 5 stars Buena fuente de poder
    Reviewed in Mexico on January 26, 2019
    Size: 300WStyle: TFX BronzeVerified Purchase
    Luis MaBr
    5.0 out of 5 stars Excelente fuente de poder.
    Reviewed in Mexico on May 12, 2018
    Size: 300WStyle: SFX Fixed Cables BronzeVerified Purchase
    galib20
    5.0 out of 5 stars Peace of mind for your PC operations
    Reviewed in India on January 27, 2018
    Size: 300WStyle: SFX Fixed Cables BronzeVerified Purchase
    Alejandro
    5.0 out of 5 stars Excelente fuente de poder
    Reviewed in Mexico on January 12, 2017
    Size: 450WStyle: SFX Fixed Cables Bronze 92MM FanVerified Purchase
    Sienna rules!
    5.0 out of 5 stars Love it!!!!! Works flawlessy
    Reviewed in Canada on November 15, 2022
    Size: 300WStyle: TFX BronzeVerified Purchase