Kingwin Lazer Platinum 550W Power Supply

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Kingwin Lazer Platinum 550W (LZP-550) ATX Power Supply
Sample Supplier
Kingwin Technology
Market Price

Kingwin is not a name that comes first to mind when considering computer power supplies. Yet, a few months ago, it became the first brand to market with a retail 80 Plus Platinum computer power supply, boasting an official tested maximum energy efficiency of 92.88%. Platinum is the higest rank given to computer power supplies tested by the 80 Plus program, which recognizes and rewards high efficiency PSU makers, and system integrators who utilize such PSUs in their PCs.

Just a decade ago, typical PSU efficiency in computers was below 70%, which meant a third of all electrical energy consumed by computers around the world was going to waste. Today, thanks in large part to the 80 Plus incentives, such waste has been much curbed, with manufacturers routinely offering 85% efficient PSUs. The last big push among power supply makers was for 80 Plus Gold, to bring maximum efficiency up to at least 90%. Platinum pushes the bar up to 92%.

Their website states that "Kingwin was founded in 1992 with a mission to produce quality accessories, solutions, and options for its customers. Its main categories include: external/internal storage solutions, power supplies and thermal solutions" for the DIY computer maket. We happen to know that Superflower is the actual manufacturer of this power supply, and markets it under its own brand as Golden King. There are currently some 25 Platinum rated models in the 80 Plus test database, and Superflower has five of them. Platinum PSUs are not easy find on the market, however. At Newegg, the Kingwin Lazer Platinum LZP-550 is still the only one available at time of writing.


Fairly big full color package for the Kingwin LZP-550.

Nice packaging, including a soft pouch for the cables.

The essence of the product: Power supply, all the cables, and four thumbscrews to mount the PSU. The attached cables are sleeved, others are in the flat data-cable style. The flat profile can make those cables easier to route in some cases.

FEATURE & BRIEF Our comment
Compliance with ATX 12V v2.2, EPS 12V v2.91, and SSI EPS 12V v2.92 Specification Good.
140MM Fan (1300RPM / 24dBA) with Intelligent Speed Control and ECO Intelligent Thermal Control System (Patent)
A variation of the stepped thermal fan control pioneered by Seasonic years ago.
Crystal Cube Modular Plug w/ Patented Power Connector Cable Management System Just looks like a different connector.
Hybrid Dual Voltage Automatic Switch System (Patent)
What does this mean?
Superior Vertical Double Layer Main Transformer (Patent) OK... but superior to what?
More than 2,000 Times ON/OFF Test
80 PLUS® Platinum High Efficiency Power Supply Certified — 50% Load (92% Efficiency), 20% Load (90% Efficiency), 100% Load (89% Efficiency) Why we're interested.
Stable + 12V Current
Single 12V rail?
Safety certifications: cTÜVus, TÜV, CB, CE, FCC, CCC, C-Tick, BSMI As expected.
Over Power/Under Power/Over Voltage/Short Circuit Protections OK.
Full Range Design from 115V ~ 250V (Active PFC) Like most high end PSUs on the retail market.
5 year warranty Good.
Physical: 170(L) x 150(W) x 86(H)mm, 5.5 lbs 20mm longer than normal.

AC Input
115~240VAC, 10A, 50/60 Hz
DC Output

There seems no mention anywhere of any temperature limits for power output. This is a serious inadequacy in documentation for a "serious" power supply, as temperature is one of the critical testing conditions, not far off input voltage. As an example, a PSU rated to deliver 550W at 25°C might only be able to do 400W at 50°C.

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