Thermaltake ToughPower XT 775w PSU Review

Cables & Internals

Thermaltake  ToughPower XT 775w PSU Review

 

Cables & Connectors

For the ToughPower XT, Thermaltake have stuck with the tried and tested PCI-e style block connectors. Originally designed for use with high powered graphics cards, this style of connector is designed to carry high loads through its tightly mating connections. However, to ensure that the motherboard receives the cleanest power, both the ATX and EPS-12v connectors are hard-wired into the PSU.

Thermaltake ToughPower XT 775w PSU Review  Thermaltake ToughPower XT 775w PSU Review

A total of eight modular headers are provided on the XT along with eight modular cables. Four of these cables are used exclusively for powering PCI-e graphics cards (red connector), while the remaining four are split evenly between SATA and Molex (black). It would have been nice to see a few extra SATA/Molex modular cables included so that users can chop-and-change between which cables are required for their system as not everybody has a huge amount of SATA powered devices. But never less, the balance between the two types is still fairly even, which is more than can be said for some PSU's I've seen recently.

Thermaltake ToughPower XT 775w Connectors
 ATX ConnectorHard Wired
1x 24 Pin
 EPS-12v / P4-12v Connector(s)Hard Wired
1x 4+4 Pin, 1x 8 Pin
 Molex ConnectorsModular6x
 Floppy Disk ConnectorsModular1x
 SATA ConnectorsModular8x
 PCI-E ConnectorsModular2x 6+2 Pin, 2x 8 Pin

 

 Thermaltake ToughPower XT 775w PSU ATX  Thermaltake ToughPower XT 775w PSU PCI-e

The ATX connector on the XT is native 24-Pin with no option to remove a 4-Pin block to take it back to the older 20-Pin standard. Of course, its been quite some time since anybody made a 20-Pin ATX motherboard so realistically this can't be taken as a negative. On the CPU power side of things, the EPS-12v connector is native 8-Pin with an additional 4+4Pin connector piggy-backing off it. This means that the XT has the ability to support everything from low-powered mATX systems, to high-powered server motherboards.

As I've already mentioned, the graphics card power comes in the form of four PCI-e connectors. Two of these are native 6Pin, while the other two can be changed between 6/8Pin standards. Additionally Thermaltake has also installed ferrite EMI filters at the end of the connectors to ensure that the cleanest power is delivered to the GPU's, and that any line noise generated by the GPU's doesn't find its way back into the PSU.

Now on to the fun bit... 

 

Internals

Removing the lid from the XT was a bit of a pain in the derriere as the screws securing it are not only placed at the top of the unit, but also at the sides. At first I didn't notice this as the large logo sticker at one side of the unit and various certification stickers at the other completely masked the location of the screws. However, on finally getting inside I was in for a treat..

Thermaltake ToughPower XT 775w PSU Internals  Thermaltake ToughPower XT 775w PSU Transformers (robots in disguise)

First things first, the internal layout is clean. By that I don't mean that Kim and Aggy have been going round the heatsinks with feather dusters, but more that the actual layout of the unit is very well spaced with none of that horrible white plastic glue being used to make sure that components don't touch. Additionally all of the cables entering the unit and going to the modular backplane are tightly bunched together, avoiding any airflow issues.

Two green coloured transformers sit in the middle of the unit with the larger of the two dealing with the step-down to +12v while the smaller deals exclusively with the +5vSB stand-by rail.

Thermaltake ToughPower XT 775w PSU VRM  Thermaltake ToughPower XT 775w PSU VRM

Two VRM modules fitted with solid state caps then take the transformers +12v output and drop it down to +3.3v and +5v outputs for the remaining rails. This is commonly referred to by manufacturers as a DC-DC Topology as the +12v output by the transformer has already been converted from AC to DC for the VRM's, unlike in a traditional PSU where the +5v rail at least is derived from an AC input.

Thermaltake ToughPower XT 775w PSU Secondary Caps  Thermaltake  ToughPower XT 775w PSU Primary Cap

All of the capacitors used inside the unit are of high quality with the primary one (pictured left) being manufactured in Japan by Nippon Chemicon and carrying the specs of 400v / 560uF / 85°C. Over on the secondary side is a collection of Taiwanese made Teapo capacitors of various sizes and specs.

Thermaltake ToughPower XT 775w PSU Fan  Thermaltake ToughPower XT 775w PSU Fan Specs

Last but not least we come to the fan. This particular fan used inside the XT 775w carries the label "Thermaltake TT-1425B". However, after a bit of digging around it would appear that it is actually a re-labelled Yate Loon D14BM-12. Why Thermatake would want to cover up the fact that their fan is made by one of the most respected manufacturers in enthusiast circles, I don't know. But regardless, the fan measures 140x140x25mm, has a rated speed of 1400rpm and can push through a reasonable 62CFM.

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Most Recent Comments

10-05-2010, 07:36:56

tinytomlogan
The XT may have 25w more power than its 750w competitors, but does it have what it takes to impress OC3D?

Continue Reading

11-05-2010, 04:20:43

Stefan Payne
Isn't the 775W version silver certified?

12-05-2010, 13:38:38

JN
Stefan, I've been hearing mixed things. Apparently the website says silver, but the box most definitely says bronze

Maybe they re-submitted after the first batch went out. :/

13-05-2010, 13:34:22

VonBlade
Great review as ever Jim. Only you could make endless power supplies always seem fresh and interesting.

Love the new graphs too. Far simpler for people with less knowledge like myself to see the important data.

Great stuff.

22-05-2010, 12:37:25

Stefan Payne
Ah, OK.

It seems that the PSU Manufacturers tend to not advertise the gained 80+ certification but rahter one (or even two!) down.

It's understandable if you'll know something about it.

Anyway, there is a mistake in that review:

Quote:
Originally Posted by Review

"Thermaltake TT-1425B". However, after a bit of digging around it would appear that it is actually a re-labelled Yate Loon D14BM-12
That's not the case.

If you'll take a closer look, you'll see 'HA1425M12B-Z' wich leads to Ong Hua, the same Ong Hua Fan you'll find in Corsairs HX750/850.

18-08-2010, 06:06:15

Newbie
Hi. Can I start by saying great site and great reviews. As you can see by the user name I'm new to this and would really appreciate some clarity on the figures (as I must be missing something).

I have taken the figures from the 25% load line

........3.3v 5v +12v 5vsb -12v Totals

Volts 3.34 5.07 12.1 5.08 -11.98 13.61V

Amps 4.5 4.5 12.75 0.75 0.12 22.62A

Power = volts * amps = 307.8582 Watts

The output power shown in the table is 197 DC Watts

Could someone please explain what I'm missing

Many thanks

18-08-2010, 09:14:00

JN
Hi Newbie, the reason you're arriving at a wattage higher than what is stated in the table is because you are multiplying the initial power draw against the resultant voltage output.

What the table actually shows is the amperage load placed on each of the rails, and the resulting voltage output by the rails due to the strain from the load.
Reply
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