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Antec > 
Item#: N82E16817371002

Antec True Power Trio TP3-550 550W ATX12V SLI Certified CrossFire Ready Active PFC Power Supply with Three 12V Rails

  • ATX12V
  • 100 - 240 V
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An important tip from one of our users: don't just check total power output, find out what you need in the way of current on each power rail. If you need 20 A on your +12V rails and the supply only has 15A, it doesn't matter how many watts the supply puts out: don't buy it. Make certain that you have ENOUGH rails, too: sometimes, you need more than just two +12V rails for your setup.

Replacing an existing power supply is easier: just get a replacement that meets or exceeds the specifications of the old one. (You can usually find those printed on the side of the supply.)

That said, here's a power supply that is compatible with most ATX format motherboards, puts out 550 watts of power (see specifications for exact distribution). Could this be your next power supply?

  • newegg ATX12V Compatible Compatible with the ATX12V standard, the Antec TruePower Trio TP3-550 power supply provides enhanced power stability to drive the latest Intel and AMD processors as well as other system components.
  • newegg 550W Maximum Power The Antec True Power Trio TP3-550 provides a maximum power of 550W to deliver safe, reliable output for high-end computer systems.
  • newegg Highly Efficient Delivering up to 85% efficiency, the Antec TruePower Trio TP3-550 power supply saves energy and may reduce your monthly electric bill too!
  • newegg Efficient Cooling A low-noise 120mm fan delivers highly efficient cooling for the power supply and the whole system and ensures quiet operation through fan speed adjustments.
  • newegg Special Fan-Only Power Connectors The Antec True Power Trio TP3-550 power supply features Fan-Only power connectors to control case fan speeds for overall reduced system noise.
  • newegg NVIDIA SLI Certified The Antec TruePower Trio TP3-550 power supply has gone through a series of rigorous NVIDIA SLI certification tests for maximum system stability when building NVIDIA SLI PCs.

Learn more about the Antec TP3-550


True Power Trio


Maximum Power
1 x 120mm low noise cooling fan
Main Connector
+12V Rails
3 x +12V
PCI-Express Connector
2 x 6-Pin
SLI Certified
CrossFire Ready
Up to 85%
Over Voltage Protection
Input Voltage
100 - 240 V
Input Frequency Range
50/60 Hz
Input Current
9 A
80,000 hours at 50°C
UL, CUL, FCC, TÜV, CE, C-tick, CCC, CB


4 x SATA connectors for Serial ATA drives
2 x PCI-E connectors for PCI-Express video cards
Three 12V output circuits provide added system stability
Accurate power rating allows TruePower Trio to deliver its full rated power, 24 hours a day rated at 50ºC
Fan Only power connectors allow TruePower Trio to control case fan speeds, reducing total system noise
Dedicated outputs for stable output and less ripple noise
Feedback loop circuits for tighter load regulation (±3%) to maintain accurate voltage to all components
Heavy duty protection circuitry prevents damage resulting from short circuits (SCP), power overloads (OPP), over voltages (OVP), and under voltages (UVP)
Power Factor value up to 99%
Gold plated connectors for superior conductivity

Manufacturer Warranty

5 years limited
5 years limited

Quick Info


  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years

Customer Reviews of the Antec TP3-550

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  • Arash M.
  • 12/28/2013 6:37:21 PM
  • Tech Level: Somewhat Low
  • Ownership: more than 1 year

1 out of 5 eggsTerrible Quality

Pros: None that I can think of.

Cons: I purchased this power supply back in 2006 for a system I was building for a family member at the time. I had ordered it among many other parts from Newegg; the only item that was defective on arrival was this power supply.

I assumed a random incident and did not considered that there is a fundamental issue with this particular model. Long story short, after usage of the second Antec True Power Trio, it died.

Bottom line is, and I am writing this to warn others who wish to purchase this "old" model, do not bother betting on this power supply to be reliable. I was burnt twice.

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  • Jonathan E.
  • 4/13/2012 9:49:35 PM
  • Tech Level: Average
  • Ownership: more than 1 year

5 out of 5 eggsGreat Product

Pros: Ive used this card in my build for about 5 years gaming with no problems. Getting ready to build a new machine soon and debating just transfering it over.

Cons: none

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  • Peter B.
  • 5/11/2011 6:47:31 PM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

4 out of 5 eggsGood Support

Pros: Silently supplied all the power I needed for over 4 years

Cons: After 4 years I noticed the internal fan never spun. However, it never overheated, and always worked fine.

Other Thoughts: Contacted Antec and they gave me an RMA number. Shipped it off, and they shipped a replacement one day after receipt. That's impressive service.

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  • Kurt S.
  • 4/20/2009 1:34:06 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

1 out of 5 eggsPoor Warranty Service

Pros: None that I know of.

Cons: Died by killing all fans, internal and external but kept on running the CPU. Did not shut down, nearly cooked my computer. Why didn't it shut down when it's own internal fan failed? POOR DESIGN.

Other Thoughts: Contacted Antec. "Sorry Charlie - no cross ship. No product in stock. No idea when it will be. Apply for an RMA, find yourself a box. Ship it to us. One day several weeks from now we'll send you one."

UNACCEPTABLE. PSU's need replacing right now. No excuse for failure, no excuse for not shutting down, no excuse for not having stock to cross ship.

I'll avoid Antec in all future purchases and recommendations.

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  • Anonymous
  • 2/12/2009 8:32:26 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year

1 out of 5 eggsDisappointing

Pros: The second one was stable for a while.

Cons: I bought a Truepower 2, 550w - lasted exactly 1 yr, but was trouble from the beginning. The warranty replacement lasted 2 1/2 yrs. The 3 yr warranty begins on the date of original purchase and replacement parts are warranted only for the remainder of that period, so I'm out of luck.

Other Thoughts: I expected much better from Antec and $100. I've had much longer service from a $30 power supply. I always liked Antec products, but will never buy their power supply again.

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  • David P.
  • 2/2/2009 3:23:14 PM
  • Tech Level: High
  • Ownership: more than 1 year

5 out of 5 eggsGreat Power supply

Pros: Very stable on all voltages. My old power supply would cause system crashes, but I have had no crashes with this power supply. My system is loaded, and this still has plenty of power to run everything, and then some.
Even when my system is highly overclocked, its 100% stable.

Cons: None that I have ran across so far.

Other Thoughts: I would highly recommend this power supply to anyone wanting a good stable power supply. I am A+ certified in computer repair, and have always found Antec power supplies to be great performers. And as always Newegg is the recommened place to buy from!!

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

  • Nicholas F.
  • 1/27/2009 5:54:02 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGood buy

Pros: Will be a year of constant use this march. No problems and more power than I needed. Plus the three 12v rails are nice for the price.

Cons: None.

Other Thoughts: The noise is not really an issue because my computer sleeps then hibernates at night so it pretty much turns off.

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

  • Patrick G.
  • 1/21/2009 11:45:46 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsVery Good

Pros: Very quiet
Runs cool

Cons: The hard drive clicking is very loud in comparison.

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

  • Joseph K.
  • 1/8/2009 10:55:19 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsPhenom 9950 and 4870 1gb work beautifully on this

Pros: Affordable power you can trust. For a relatively modest 550W, this unit is AMD/ATI-certified to run any single Radeon HD 4850, 4870, or even two 4850s in Crossfire! (It won't do two 4870s, but that's getting greedy for an $80 PSU.) Feels nice and heavy compared to other PSUs I've used, which is a really good sign.

Even with my 125W CPU overclocked, and my Sapphire 4870 1gb clocked from 750/900 to 800/1000, the PSU handles stably. I haven't crashed once running programs or playing games. Also operates quietly, with cables with plenty of length. BIOS reads the 12v rail (the most important) at 12.15v.

Cons: Ugly and plain. Some might argue that the cables are too long and that there are too many of them, but most of them come in handy for me.

Only has two PCI-e 6-pin connectors, but in a way, this is good so that people don't try to power two 4870s or something (one of these cards requires both connectors).

Other Thoughts: If you're going to run a single video card, get this PSU. If you are going to do two cards--or have plans of doing that in the future--you might want to consider Corsair's TX750. That is the PSU I wish I had, though at the current time, it'd be overkill.

Another thing to note: total amps available for the 12v rails is limited to 42a, NOT 54 (18a x 3) as you might expect. So plan accordingly ... this is still plenty for most people.

Did you find this review helpful? Yes No

5 out of 5 eggsbought in 06 still amazing.

Pros: SLI Ready, 24 pin with the 4 optional for removal, Quiet, Great for those who are wanting to upgrade a little further on.

Cons: none

Other Thoughts: Would recommend to anyone who is building a worthy gaming rig and not going all out.

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Item#: N82E16817371002
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