Thermaltake Purepower RX 550 AP (W0150, 550W)
Thermaltake was the first manufacturer of coolers that took to selling power supplies. It was later joined by Zalman and, recently, by GlacialTech. The company’s model range is impressively large, including several lines, ranging from inexpensive solutions to 1000W monsters. The Purepower series belongs to the mainstream. It is higher than the low-end TR2 series but lower than the expensive Toughpower series.
The PSU has is painted a matte dark-bronze color that distinguishes Thermaltake’s products from glossy PSUs.
The fan grid is designed in a peculiar way. PSUs from this price category normally have a wire grid but this one is punched out and neatly shaped with curved-in edges. Looking prettily enough, this grid is, however, no match to the ordinary wire with a minimum surface area when it comes to minimizing the resistance to airflow.
Internally this PSU seems to resemble PSUs from FSP Group with its three parallel heatsinks. But the actual manufacturer is Channel Well (CWT) and the only common trait with the FSP Epsilon series is the number of heatsinks. The circuit design of the Purepower RX is closer to the classic examples without the doubling of power semiconductor components to reduce heat dissipation as is typical of the Epsilon series.
The PSU case is designed in such a way that one side panel belongs to the bottom while the other moves together with the cover. There is quite a lot of free room behind the PCB. This is due to the size of the fan – it wouldn’t have fitted into the case otherwise.
This PSU has three “virtual” +12V output lines with a combined allowable current of 41A. Interestingly, the minimum load currents are specified on the label as well. The PSU won’t fail under lower currents (the Power Supply Design Guide is explicit on that point), but is not guaranteed to yield stable voltages under such conditions.
The PSU offers the following cables and connectors:
- Mainboard cable with a 20+4-pin connector (47cm)
- CPU cable with an 8-pin and a 4-pin connector (49+15cm)
- Two graphics card cables with 6-pin connectors (50cm)
- One cable with three Molex connectors and one FDD mini-plug on each (50+15+15+15cm)
- One cable with four Molex connectors and one FDD mini-plug on each (50+15+15+15+15cm)
- Two cables with two SATA power connectors (49+15cm)
All the cables are sleeved.