SUPPLIED BY: JonnyGURU.com
PRODUCT: Cooler Master MasterWatt Lite 600W 230V
PROD LINK: MasterWatt Lite 600 Product Page
PRICE: 4,000 Rupees @ MD Computers
Price is at time of testing!
Oh, lookie! A sleeve bearing fan! Good news, though, this unit has a five year warranty! If… you live in Singapore, Malaysia, Indonesia, or India. Anywhere else, you get three years and that fact is enough for me to toss the fan point later. I seriously don’t get why they can’t do five years for all markets this thing is available to.
Looking at our Enhance innards, we find what looks like it could pass for a good 400W unit Stateside. But because this unit doesn’t have to deal with 120V mains, the primary side doesn’t need to be quite as bulky.
Line filtering begins here, of course, with two Y caps and one X.
Enhance is usually fantastic with soldering. Not today. I foresee half that point leaving, too. That’s a CM6800 PWM/PFC controller there, just off center. A nearby AT6002H handles standby duty with a CM03X cap discharge IC helping with efficiency on the line input.
I have yet to see the Enhance platform that doesn’t have a decent line filter, though I have seen it not be enough at times. Even so, this thing does have all the parts. I see two more Y caps, one X cap, a TVS diode, and two coils.
I also see a GBU606 sans heatsink, which seems really under powered to me until I consider once again that it’s not being asked to work with 120V mains. Even so, the lack of any heatsinking at all combined with the low rating makes me nervous. It worked fine at thirty-eight degrees for ten minutes, but who’s to say it would hold up much longer than that at full rated temperature at the 200V side of the line input?
Sigh. Capacitors. Initially, I thought we had all second tier stuff in Teapo and Taicon, but now I find myself looking at Su’scon. There goes all of the capacitor point.
The hallmark of an old group regulated design… two coils, with the 5V and 12V sharing the big one and the 3.3V getting the little one. No voltage regulator modules at all… the secondary of this thing is as old school as it gets. As in “last century.”
Found the fan control thermistor. This is likely pulling double duty for overtemp protection, too. With no thermal interface material for the heatsink that usually resides next to it, I now find myself doubting the effectiveness of both the fan controller and the overtemp protection. This thing is starting to give me a rather negative outlook of Enhance’s less than high end designs. We’re not in gutless wonder land yet, but we’re a lot closer to it than I would like to be right now.
From another angle, we see another passel of Teapo, Su’scon, and Taicon capacitors. We also find out that the unit has a PS229 protection IC, which does in fact have undervolt protection. It’s just set so low by default it might as well not be there. 3.3V trip point is given as 2.2V typical. 5V and 12V are at 3.5V and 9.0V typical, respectively. No wonder they don’t brag about it on the box.
Folks, if the overtemp isn’t working, I reckon you would need an overload condition to shut this thing down. It’s dangerous to hardware as it sits now, if you ask me.
Oh, Lordy. More fun times… that’s an 85 degree main filter cap, and I will be scoring against that. Forty degree rating, cap barely in the fan’s airflow? Yeah, that’s not good enough for me. And I am sorely tempted to dock even more points because of the three times this thing shocked me while I was taking it apart. Even after the main cap came out, the mainboard still found a way to bite me. Been a long time since that last happened.
Primary side parts include one diode and one SVF20N50P for PFC, and another two SVF20N50Ps for main switchers.
Secondary side parts include one STPS30L45CW for the 3.3V rail, one PFR30L30CT for the 5V rail, and four of those… well, you can read ’em… for the 12V.
I’m done with being shocked by this thing. Time for scoring.