SUPPLIED BY: JonnyGURU.com
PRODUCT: Riotoro Builder 500W
PROD LINK: Builder 500W Product Page
PRICE: £49.99 @ Epsilon Computers
Price is at time of testing!
First, a fan shot shows us a sleeve bearing wonder. At three years of warranty, I’m not even going to pretend I’m happy with this fan.
Yep, that be a Sirfa platform in there. With full DC to DC conversion for the minor rails, too. None of that halfway action we saw in that 450BV, though I’ll remind you the oddball way that one was built made it perfect for old builds requiring 5V for the CPU. This one can’t compete in that regard, because the minor rail VRM isn’t powerful enough.
Line filtering starts with two Y caps and an X cap.
Soldering is surprisingly good for Sirfa, but I’m still going to deduct half a point later. A CM6805 acts as PWM and PFC controller for the unit.
Here, we find that the unit has a WT7527V protection IC, along with even more line filtering including two coils, one X cap (two if you count the one after the bridge), two Y caps, and a TVS diode.
The main filter capacitor is from CapXon, and is yet another 85 degree rated part. I’m torn about this… in the 450BV, I docked half a point due to proximity with the primary heatsink and the low max temp rating. In this unit, the cap is further away from the heatsink, but the max temp rating is higher. I’m going to do the same deduction here, I think.
PFC parts include two T60R380Ps and a diode.
Two more T60R380Ps act as main switchers.
Three of these NCE8295A parts handle 12V output.
And there’s the minor rail VRM, featuring an APW7159C controller and several 0906NS parts for output.
Capacitors on the secondary include Teapo, Teapo, and more Teapo. Decent for a bargain unit like this.