Fanless PSUs: Kingwin Stryker STR-500 & Silverstone ST50NF

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SPECS & FEATURES: KINGWIN STRYKER FANLESS 500W

As with most brand name computer components these days. the Kingwin is nicely packaged and presented. The package has a distinct resemblance to that of the LZP-550.


Fairly big full color package for the Kingwin STR-500.


Nice packaging, including a 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, the relatively short detachable ones are in the flat data-cable style. The flat profile can make those cables easier to route in some cases.


The PSU itself features a thick aluminum extrusion with fins for the top plate. This is similar to umpteen other fanless PSUs that have come before: The case itself acts as a heatsink. All other sides (except the bottom) are well vented.

There are four output plugs for detachable SATA and IDE power cables.


We had no interest in opening up the Kingwin or the Silverstone (perhaps spoiling any cured TIM between internal and external heatsinks), but a side panel proved easily removable. This provides a glimpse of one of the two heatsinks PCB that extend up and mechanically couple to the top extrusion cover, which helps dissipate heat outside the PSU. The same cooling system is used in the Silverstone.

FEATURE & BRIEF Our comment
Compliance with ATX 12V v2.2, EPS 12V v2.91, and SSI EPS 12V v2.92 Specification Good.
Fanless 0 dBA Operation
We'll see.
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?
EuP (Energy-using Products) instructions: energy consumption during shut off status less than 1W. Great!
More than 2,000 Times ON/OFF Test
OK.
80 PLUS® Platinum High Efficiency Power Supply Certified — 50% Load (92% Efficiency), 20% Load (90% Efficiency), 100% Load (89% Efficiency) Should make fanless operation a cinch.
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.
5 year warranty Excellent.
170(L) x 150(W) x 86(H)mm; 6.61 lbs or 3 kg 20mm longer than normal.

Kingwin STR-500 SPECIFICATIONS
AC Input
115~240VAC, 10A, 50/60 Hz
DC Output
3.3V
5V
12V
-12V
5Vsb
20A
20A
41.5A
0.5A
2.5A
100W
498W
6W
12.5W
550W
0ºC ~ 50ºC operational temperature

Kingwin STR-500 Output Cables
Fixed
ATX (565mm)
1
4+4 pin EPS12V/ATX12V
1
6 pin + 6/8 pin PCIe (730mm)
1
Detachable
6 pin + 6/8 pin PCIe (550mm)
1
4 SATA (880mm)
1
3 4-pin Molex + 1 floppy (880mm)
1
2 SATA + 2 4-pin Molex (+880mm)
1


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