Reviews - SilverStone ST45SF-G 450W SFX Series Power Supply
Sample Provided by: SilverStone (By Tazz on Sun, Feb-10-2013)

Page 5 - Taking apart the SilverStone ST45SF-G.

The first thing we see on this unit when we take the cover off is this here Young Lin Tech fan.

If I'm not mistaken, that's an itty bitty Enhance platform in there.

Now, bear with me. I have only these pictures to go on... the unit itself is not in front of me. Yeah, I know I've been making out like I'm actually in Tazz' house right now, but that's just me being a loon. I'm really up in Saskatchewan, dissecting this unit from afar using pictures he's provided me.

This is the beginning of the AC line filtering. One X cap, two Y caps, and one coil.

Man, this thing really is crammed full of parts. At the very least, we can see that the secondary filtering is done using Nippon Chemi-Con parts.

I do believe I see a polymer cap or two in there as well.

Aha... the main filter cap is from Panasonic.

Here, we can see the rest of the line filter. Two Y caps, one X cap, one coil, and a MOV.

Another look at the Panasonic main filter cap, a 330µF 450V rated at 105°C.

This is the bridge rectifier, which is a GBU1006.

Located on this heatsink we have the primary switchers, a pair of 5R140P MOSFETs.

This would be the PFC section parts here, another 5R140P MOSFET on the right with a boost diode on the left.

PFC controller is a CM6502. These are often found where the main PWM chip has no PFC control facilities, like the CM6901.

Protection duties handled by a PS223 IC.

The 12V output is handled by a pair of Infineon 015N04N MOSFETs.

These two boxes here are circling the two VRMs for the minor rails. And these do look like the same VRMs we've seen in other newer Enhance built units, like the Strider Gold Evolution 550W.

Each VRM uses an APW7073 controller and a CSD86350Q5D power block MOSFET.

Last but not least, we'll have a look at the underside of the board on both units. We need to see both because...

Solder quality has slipped noticeably between the two revisions. Version 1.0 I would let go without a scoring deduction, but it's gotten just sloppy enough in version 1.1 to merit a minor point withdrawal. I see a few joints with flux leaking from them, particularly in the bottom right corner. But it's not a terribly big deal, so it will only be a small deduction.



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