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Silverstone > 
Item#: N82E16817163111

SILVERSTONE ST56ZF 560W ATX12V / EPS12V SLI CrossFire Active PFC Power Supply

  • ATX12V / EPS12V
  • 90V ~ 264V (Auto Range) 47 - 63 Hz
  • +3.3V@38A,+5V@40A,+12V@38A,-12V@1A,+5VSB@2.0A
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Learn more about the Silverstone ST56ZF




Maximum Power
Main Connector
+12V Rails
PCI-Express Connector
2 x 6-Pin
SLI Certified
CrossFire Ready
78% Typical
Over Voltage Protection
Overload Protection
Input Voltage
90V ~ 264V (Auto Range)
Input Frequency Range
47 - 63 Hz
100,000 hours at 25°C, full load


1 x Main connector (20+4Pin)
1 x 12V (P4) (8Pin)
4 x peripheral
4 x SATA
1 x Floppy
2 x PCI-E
Powerful single +12V rail (38A) for special performance requirements
Dual PCI-E 6Pin connector (NVIDIA SLI Certified)
Four Serial ATA connectors
Industrial class components
Support for ATX 12V & EPS 12V

Manufacturer Warranty

3 years limited
3 years limited

Quick Info


  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years

Customer Reviews of the Silverstone ST56ZF

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  • Greg D.
  • 2/11/2010 9:13:10 PM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

3 out of 5 eggsGood PS

Pros: It was a great PS, Worked good for two years then started to turn off on its own.

Cons: Wish it would have lasted a little bit longer

Other Thoughts: We will see how silverstone treats my RMA?

Did you find this review helpful? Yes No

  • Largo P.
  • 1/21/2008 11:39:35 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

3 out of 5 eggsdied after 6 months

Pros: Does everything it claims.

Cons: After 6 months of using it, it died on me. I called silverstone up and they replaced it with a brand new one free of charge. They did however make me pay the shipping to get the defective one back to them. They claimed that 2% of their PSU's are defective. They also claimed that 2% of ANY manufacturers PSU's are defective. I don't know how true this is, but if it is, then 2% of us are going to have to deal with this downtime :(

Other Thoughts: I sent it in, they received it within three days. It took an additional ten days(weekends included) to get it back from them. Luckily I had a spare PSU, but if I didn't, I wouldn't be too happy with how long it took to get back. My only fear at this point is whether I received another defective one. I guess I'll know in another 6months to a year if I'm that 1 in 2500 that manages to get the defective one twice in a row.

1 out of 1 people found this review helpful. Did you? Yes No

  • Largo P.
  • 12/13/2007 4:44:57 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsPSU died on me

Pros: It worked great when it worked. Lots of connections.

Cons: I purchased this PSU on 6/6/2007 and it died on 12/12/2007. It had about 200watts of load put it on 24/7.

Other Thoughts: Reading others reviews, mine was probably a fluke. Hopefully this won't happen again :(

1 out of 1 people found this review helpful. Did you? Yes No

  • Duc N.
  • 12/4/2007 6:49:07 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year

5 out of 5 eggsGreat PSU and works for 20pin

Pros: Single Rail and solid PSU

Cons: Reviewers on newegg

Other Thoughts: What are reviewers talking about? I am on a 754pin mobo with a 20pin connection. I have this VERY PSU connected into it with the 4pin still attach to the connector but just not plug in the 20pin connector. 24pin to 20pin adapters are useless unless you have some object around your 20pin connector just as capacitors. Heck, you can still run a 24pin mobo on a 20pin PSU but just don't run any high end videocard.

Seriously. Some of you guys need to label yourself as low knowledge on computer instead of high.

1 out of 2 people found this review helpful. Did you? Yes No

  • Mr. M.
  • 11/28/2007 4:58:47 PM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsAwwsome

Pros: Most solid PSU I've ever had. Keeps up with all your PC needs as long as you don't have x2 uber high powered cards.

Cons: DOES NOT come with 20+4 pin MB adapter as stated. It is 24 pin only.

Other Thoughts: If you want this PSU for a 20 pin MB, make sure to buy an adapter from 24 to 20 pin. I ended up having to do so.

0 out of 1 people found this review helpful. Did you? Yes No

  • Justin L.
  • 9/3/2007 2:55:27 AM
  • Tech Level: Somewhat Low
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsWorks Very Well

Pros: Very stable, quite reliable, built tough, all the cords I have needed, and all the cords reach my computer components. I like the non-lit, dull black look of the power supply as well. =)

Cons: None that I have found.

Other Thoughts: Where I might not be the most technically advanced person to tell you why this power supply is a good one, I can only recommend this product. Very efficient, very reliable, and has put up with quite a load of usage for me for over 1 year.

Did you find this review helpful? Yes No

  • Gregory K.
  • 7/13/2007 10:14:54 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsWorth its weight in silver

Pros: Sorry for the corny joke in the title there... anyway:

I've been running it 24/7 for 4 months now. It's a very nice stable PSU. I decided on this one after much research and reading a review on tomshardware. It has great efficiency, great specs, and plenty of power to run all your equipment.

It's perfect for those looking to run those power hungry X1900XT cards.

Cons: None.

Other Thoughts: It isn't filled with countless numbers of LEDs and clear plexi, so this isn't the PSU to show off with looks. But you will be able to show off with power, which is far more important.

Did you find this review helpful? Yes No

  • Anonymous
  • 5/1/2007 1:41:36 PM
  • Tech Level: Somewhat High
  • Ownership: 1 day to 1 week

5 out of 5 eggsSingle Rail Superiority?

Pros: I purchased this supply to replace a failed BFG 600 Watt dual 12-volt rail supply. Once morning, after a year and one-half, it just didn’t wake up. The Green to ground trick didn’t even revive the supply. When this supply gets replaced under the “lifetime” warranty, I’ll stick it in a closet somewhere and use it as a spare.

I found the Silverstone SST-ST56ZF after a lot of searching and it seemed to fit the dollar bills, has excellent reviews, dual 12-volt rails, and great recommendations. I found that the supply, with 38 amps on one 120volt rail suited my needs, and the wiring harness is more than ample for about anything you want to throw at it. And, it is rated at that power at elevated temperatures so you know you really get it.

In operation, the supply is quiet, even with just an 80mm, verses 120mm, fans on some supplies. It’s a good ball bearing fan, too. I have it running in an 85-degree room with the front fans running louder than the supply fan.

Cons: All in all, this is one good supply for the money. It is pretty basic looking so you case moders may need to look elsewhere. But for anyone else, this thing is great.

Other Thoughts: I looked for a better replacement, and had used a PC Power and Cooling ATX510 watt supply in the past. It works great but it is load as hell, and expensive. But it is a single 12-volt rail supply, which seem much better able to manage the SLI card’s power requirements than dual or triple rail supplies. And, you don’t have to worry about load balance with a single rail supply, either. This can even wreck an OK application for a dual rail supply, and it isn’t really the supply’s fault. The server spec doesn’t seem to be an issue as far as I’m concerned. I don’t know the reason(s) behind the dual rail requirement on some power supply standards.

Did you find this review helpful? Yes No

  • Clinton M.
  • 4/1/2007 12:10:50 AM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsNewEgg. The Mesiah of Solutions

Pros: 38A on a Single 12v rail? need I say more? POWERFUL!!! I picked up a X1950 Sapphire Pro. The card is a power muncher and this PSU solved my issues i had with it not geting enuff power.

Cons: Pictures on website are false and deceptive. 20+4 pin is really a 24 pin with no way to detach the 4 pins for an aging AGP MB like mine so i took Tschaikovsky advice and gently split off the extra 4 pins with a knife (careful not to cut the wiring or your brand new PSU will become the worlds biggest paper weight)and Wallah!

Other Thoughts: If you happen to own an X1950 pro, i seriously suggest doing your homework. if you have that card, this is the PSU you need.

2 out of 3 people found this review helpful. Did you? Yes No

  • Dave B.
  • 3/21/2007 8:31:59 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year

5 out of 5 eggsGreat quality

Pros: Single, high amp rail. NO LED! Never had an issue with drawing too much power.

Cons: None

Other Thoughts: Expensive, but you get what you pay for.

Did you find this review helpful? Yes No

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