We had a lot of troubles with Vantec’s last power supply, the Stealth.  We found an error in the production label, which quickly led to a change in all the labeling on all Stealth power supplies.  If anything, we were glad we could make a difference to change a product before it was too late.  Vantec took a lot of our comments to heart, and thus put out a second revision on the Stealth.

Click to Enlarge
Click to Enlarge

We were told that some of the changes in the power supply included tighter manufacturing specifications and an overall better performing final product.  Vantec also took the liberty of lowering the price of the unit a bit to avoid discouraging system builders.  With those new elements in mind, we set out to try one more time. 









combined theoretical

actual combined

advertised  total

Vantec Stealth 520W










Notice that the combined rail on the 520W Stealth is 260 watts.  Interestingly enough, +5.0V rail comes in at 260W.  This is unusually high, and as a result the +3.3V rail is unusually low.  We definitely would not recommend this power supply for AMD system builders, especially overclockers. (Intel system builders will have no problems with wattages).

The saving grace for Vantec comes in the features.  Later in this article we will explain why we are not crazy about the fan control switches, but the cable management, serial ATA connectors, and universal ATX adaptor are great additions. The 24 pin ATX cable will only show full usefulness on Intel server motherboards, but the 24pin to 20pin adaptor is included for standard desktop motherboards as well. The Stealth also comes with 9 standard molexes, which makes sense if this power supply is to target server markets.

By far, the best feature is the external AC plug.  Perhaps it is sort of a nostalgic addition for power supplies, but it definitely is an option that makes sense.  For example, plugging your speakers into the Stealth assures that they are off when your computer is off.  Thus, the speakers do not crackle or produce feedback when shutting down. We don't really recommend connecting a monitor to this outlet, particularly CRTs. You can really damage a CRT by pulling the power on it, so if your computer shuts down unexpectedly a lot, you will have a tough time keeping your CRT in good health.

The Stealth is not a cheap power supply.   Our 520W version costs about $120, which limits their ability to reach out to system builders with shallow pockets. Most of this cost is attributed to the aluminum construction, but other things such as the fan control also kick the price up.

ThermalTake PurePower 480W Vantec Ion 400W
Comments Locked


View All Comments

  • unclebud - Wednesday, February 2, 2005 - link

    i came in here today looking for just the same thing though!
    we needs a new ps article! thanks in advance anandtech!
  • JustAnAverageGuy - Sunday, January 30, 2005 - link


    It's an extremely old article. Nobody reads those except when they need to be pulled out of the vault.
  • Dopey - Wednesday, January 12, 2005 - link

    Sad to see no comments since 2003! ???
    Looking for a good power supply for AMD and review indicates that both Fortron & Zalman are good at not too high price. But looking at Antec True Power 330W I read "beware of the extremely modest +12V rail. If you are running a high end video card, or an Intel Pentium 4, this power supply simply will not produce enough juice." Both the Fortron &n Zalman deliver just 180 watts on the +12V rail while the Antec True Power 330W puts out 204 watts. And if you look at the whole list of PSUs reviewed 204 watts looks like a respecatable amount of power. So ... ????????????????????
  • MIDIman - Friday, November 7, 2003 - link

    I bought the Zalman 300w for $50 as a result of this article. Love it to death, but newegg stopped carrying it.

    1) What size fan is in the Fotron reviewed here, 120mm or 80mm?

    2) What is the model number of the 300w alternative to the Fortron FSP400-60PFN?

    3) Isn't the Sparkle FSP350-60PN reviewed here also a fotron, and what is the model number of its 300w alternative?
  • Anonymous User - Monday, October 27, 2003 - link

    You state for those PSU's that have good amoubt of voltage for the 3,3V are good for AMD.

    It will also be nice to say that most new motherboard from AMD are now using 12 RAIL e.g. 8RDA3+ many more and from what ive seen all K8 mobos use 12 RAIL

    all in all good review.

    What i have found with my TT320W that when you stress it too much and it heats up it will shit down whole system.

    Also if your PC is off for many hours if you touch the PSU its worm :S

    Ordered my Antec 550W True Control

    Also you should show how to short the old PSU so user can use 2 PSU in one system..

    I run my whole system on a 480W ProSourse untill my 550W Antec TC is here

    My GFFX5900 runs on a dedicated PSU 300W soon it will have a dedicated 480 ProSource :D

    And all my 12 fans run on a 300W generic PSU

    Also TT's seem not to like when to many devices are connected to it
  • Anonymous User - Tuesday, October 14, 2003 - link

    To know how much the exhaust air will heat a room you have to know not only its temperature but also its volume. It would be simpler to measure the efficiency of the supply.

    The tests were not very thorough at all because if they were they would have included electrical noise and current measurements and testing at full power.
  • Anonymous User - Saturday, September 13, 2003 - link

    The memory errors could be due to bad filtering more than cable shielding. Putting a 'scope on the outputs would would provide a graphic portrayal of output quality. <hint, hint> :-)

  • Anonymous User - Sunday, September 7, 2003 - link

    I enjoyed reading the article and I think it was very well written and the tests were very thorough. Although the article discusses "heat" and examines each power supply to see how well they deal with the heat issue, I think from a consumers point of view, you should have measured the difference in the temperature of the exhaust that is emitted from the power supply. For me that is a real issue as the heat that emits from my existing power supply probably raises the room temperature by 7 to 8 degress (to the point of making it uncomforable to stay in the room on a hot day). I want a power supply that doesn't blow out hot air. Which one of these blows the coolest air?
  • Anonymous User - Friday, August 22, 2003 - link

    As much care was taken in creating the title as in testing the power supplies.

    I hope to see another Anandtech power supply review soon, only one with proper testing. I have to give Anandtech an A for effort in this case, but I can't still give them a passing grade. Please consult with a specialist in this field for any future test.
  • Anonymous User - Wednesday, August 20, 2003 - link

    Is it just me or does the article title seems a little off? "2003 Power Supply Roundup Part II: Better Faster Cheaper" Faster? A faster P/S?

Log in

Don't have an account? Sign up now