Hardware Secrets

Home | Camera | Case | CE | Cooling | CPU | Input | Memory | Mobile | Motherboard | Networking | Power | Storage | Video | Other
Content
Articles
Editorial
First Look
Gabriel’s Blog
News
Reviews
Tutorials
Main Menu
About Us
Awarded Products
Datasheets
Dictionary
Download
Drivers
Facebook
Forums
Links
Manufacturer Finder
Newsletter
On The Web
RSS Feed
Test Your Skills
Twitter
Newsletter
Subscribe today!
Search



Recommended
Switching Power Supplies A - Z, Second Edition
Switching Power Supplies A - Z, Second Edition, by Sanjaya Maniktala (Newnes), starting at $48.88
Home » Power
Seasonic X-Series KM3 650 W Power Supply Review
Author: Gabriel Torres
Type: Reviews Last Updated: December 12, 2012
Page: 1 of 13
Introduction
Hardware Secrets Golden Award

Seasonic is releasing the third generation of their power supplies with the 80 Plus Gold certification, dubbed the X-Series KM3, using a completely different internal design. So far, three versions were released, 650 W, 750 W, and 850 W, all with a single +12 V rail and a fully modular cabling system. Let’s see how the 650 W model fared on our tests.

Seasonic X-Series KM3 650w
click to enlarge
Figure 1: Seasonic X-Series KM3 650 W power supply

Seasonic X-Series KM3 650w
click to enlarge
Figure 2: Seasonic X-Series KM3 650 W power supply

The Seasonic X-Series KM3 650 W is 6.3” (160 mm) deep. It uses a 120 mm ball-bearing fan on its bottom (Sanyo Denki San Ace 120 9S1212F404). This fan is different from the one used on the Seasonic X-Series KM3 650 Wi. The power supply has a “hybrid/normal” switch that allows you to configure the fan to turn on only when the power supply load reaches 30% of the unit’s labeled wattage (i.e., 195 W), so the power supply won’t make any noise when the computer doesn’t demand a lot of power. Under the “hybrid” mode, between 30% and 50% load the fan will spin at a lower speed, generating lower noise than usual.

Seasonic X-Series KM3 650w
click to enlarge
Figure 3: Fan

The modular cabling system from this power supply has 13 connectors: two for the main motherboard power connector, six for video card and ATX12V/EPS12V connectors, and five for peripheral and SATA connectors. This power supply comes with the following cables:

  • Main motherboard cable with a 20/24-pin connector, 23.6” (60 cm) long
  • One cable with two ATX12V connectors that together form an EPS12V connector, 25.6” (65 cm) long
  • One cable with one EPS12V connector, 25.6” (65 cm) long
  • Two cables, each with two six/eight-pin connectors for video cards, 21.6” (55 cm) to the first connector, 3.9” (10 cm) between connectors
  • Two cables, each with four SATA power connectors, 15.7” (40 cm) to the first connector, 4.7” (12 cm) between connectors
  • One cable with two SATA power connectors, 12.6” (32 cm) to the first connector, 4.7” (12 cm) between connectors
  • One cable with three peripheral power connectors, 15.7” (40 cm) to the first connector, 5.1” (13 cm) between connectors
  • One cable with two peripheral power connectors, 11.8” (30 cm) to the first connector, 5.1” (13 cm) between connectors
  • One adapter to convert a standard peripheral power connector into a floppy disk drive power connector

All wires are 18 AWG, which is the minimum recommended gauge.

The number of connectors is very good for a 650 W power supply, allowing you to install up to two high-end video cards that require two auxiliary power connectors each.

Seasonic X-Series KM3 650w
click to enlarge
Figure 4: Cables

Let’s now take an in-depth look inside this power supply.

Page 1 of 13  | Next »
Print Version | Send to Friend | Bookmark Article | Comments (16)

Related Content
  • Seasonic S12II Bronze 430 W Power Supply Review
  • Seasonic X-Series 750 W Power Supply Review
  • Seasonic Platinum Fanless 520 W Power Supply Review
  • XFX PRO 750 W Black Edition Full Modular Power Supply Review
  • Corsair HX650 Gold Power Supply Review

  • RSSLatest News
    LUXA2 Releases New P1-PRO Battery Power Pack
    October 1, 2013 - 7:23 AM PST
    MSI unveils GP70 and GP60 Laptops
    September 30, 2013 - 7:23 AM PST
    AMD Unveils Next-Generation Radeon Graphics Cards
    September 27, 2013 - 5:33 AM PST
    Genius Introduces Energy Mouse in North America
    September 27, 2013 - 5:32 AM PST
    Apple Updates iMac
    September 25, 2013 - 5:27 AM PST
    .:: More News ::.




    © 2004-13, Hardware Secrets, LLC. All rights reserved.
    Advertising | Legal Information | Privacy Policy
    All times are Pacific Standard Time (PST, GMT -08:00)