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Tagan TurboJet TG1100-U96 (1100W)

While low-wattage power supplies aren’t very variegated when it comes to their exterior design, there is even less variation among 1000W models. They are all black bricks, perhaps with varying length. The TG1100-U96 is in between the PSUs from OCZ and PC P&C in this respect: 150x86x170mm which is a mere 3 centimeters longer than a standard ATX power supply.

But looking at the back panel we can see one more significant difference: this PSU features a push-pull cooling design with two fans. One fan is sucking air into the PSU case and the other exhausts it.

Like the PSU from Cooler Master, the TG1100-U96 has two power transformers that work in sync. The manufacturer says this improves stability of the output voltages, but this is not exactly so. As I wrote above, the two-transformer circuit is simpler in terms of component placement and is also cheaper than one transformer of double capacity. The PSU marking (TOP-Txxx) reveals the actual manufacturer of the PSU, which is Topower.

The heatsinks are shaped in a fanciful way here: they have a central groove along their entire length and small dense fan-like ribbing. Intricately shaped heatsinks are not always good, though. More often than not they create additional aerodynamic resistance, slowing air flow and calling for a more powerful fan.

The max output power of this PSU is 1000W and it can yield 960W of it through its +12V rail. The +12V rail is split into six “virtual” output lines. The manufacturer’s website doesn’t say at which ambient temperature and input voltage these numbers are correct.

The PSU offers the following cables and connectors:

  • Mainboard power cable with a 20+4-pin connector, 49cm long
  • CPU power cable with a 4-pin connector, 56cm
  • CPU power cable with an 8-pin connector, 56cm
  • Four graphics card cables with 6-pin connectors, 59cm
  • One screened cable with one Molex connector, 46cm
  • One cable with three Molex connectors, 46+15+15cm
  • Two cables with three SATA power connectors on each, 46+15+15cm
  • One cable with four SATA power connectors, 36+14+14+14cm
  • One cable with a ground connector (to additionally connect the PSU’s ground with the system case)

Topower, the actual manufacturer of this PSU, is known to be predisposed towards screened cables. Unfortunately, this screening brings no real benefits. It has no effect on stability of the PC and on the output voltage ripple. Screened cables are thick and stiff and it is hard to lay them out in the system case in such a way that they don’t take too much space and press on the connectors too much. This can be seen with the 8-pin CPU power connector which is actually composed out of two cables with 4 wires in each (but the connector itself is not splittable).

Fortunately, the Tagan PSU uses screening on the graphics card and CPU cables only (the VGA/HDD cable shown in the picture above is a strange reminder of the past when graphics cards used to be powered from the same connector as HDDs). HDD power cables in original Topower PSUs can be designed in the same way, too, which is downright unacceptable.

An interesting feature of this PSU is that it comes with adapters from SATA power connectors (the PSU offers 10 of them) into PATA or Molex power connectors (the PSU offers only three such connectors). I think this is a reasonable approach. If the PSU is expected to be used in modern powerful systems, its selection of native connectors should meet the requirements of such systems, not the other way around.

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