Fanless PSUs: Kingwin Stryker STR-500 & Silverstone ST50NF

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SPECS & FEATURES: SILVERSTONE ST50NF

Silverstone has always done a good job with packaging and presentation. No surprises here. The silver color box of the Silverstone fanless series remains largely unchanged from their previous fanless models

Big silver color box. Nice packaging, with excellent shock protection. The ST50NF output cables are long, plentiful and permanently attached. It might be hard to keep the cables tidy in a small or minimalist system. As with all previous fanless Silverstones, the top panel is a thick aluminum extrusion with fins and vent holes. All but one other side is well vented. This photo of the ST50NF from the Silverstone web site shows how the internal heatsinks are mechanically and thermally joined with the top external plate, just like in the STR-500.

Silverstone ST50NF FEATURE HIGHLIGHTS
FEATURE & BRIEF	Our comment
Fan-less thermal solution, 0 dBA acoustics	We'll see.
Efficiency 84%~88% at 20%~100% loading	The 80 Plus test report rates it a Silver, but the retail box cites Bronze. Curiously, the product web page makes no mention of 80 Plus whatsoever.
Strict ±3% voltage regulation	OK.
PCI-E 8pin & 6pin connector support	Pretty standard.
Powerful class-leading single +12V rail	Its rated 38A is actually lower than the Kingwin's 41.5A.
Aluminum construction	OK.
Support ATX 12V 2.3 & EPS 12V	Par for the course.
Over Current Protection, Over Power Protection, Over Voltage Protection, Over Temperature Protection, Short Circuit Protection	OK.
Full Range Design, 99V ~ 264V (Active PFC)	Like many high end PSUs.
1 year warranty	Short compared to others.
150(W) x 86(H) x 160(D) ; 7.7 lbs or 3.7 kg	10mm longer than standard.

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