Internals & Cables

Internal Components

Truth be told, there are very few 'manufacturers' out there who actually make their own PSU's. This is mainly because PSU manufacture isn't something that you can get good at over night, and the tools and machinery that go into producing a PSU would be a totally uneconomical investment for even a company as large as ASUS. For this reason, ASUS along with many other well know PSU brands use what is known as an OEM (Original Equipment Manufacturer) to build their PSU's for them.

However, this certainly doesn't mean that ASUS hasn't been involved in the specification and design of the unit. Far from it. Aside from selecting the actual OEM to build the units there are many other ways in which ASUS can make their PSU different from the generic ones that the OEM may build. This starts with things like how many cables are going to be included, what colour sleeving (if any) is it going to have, how much power is going to go to each of the PSU's rails and what kind of fan is going to be used..the list is really endless.

Therefore, even though we know that ASUS have chosen DELTA as their OEM, there's still plenty of reasons to poke around inside the unit and find out just what makes it tick!

ASUS Vento 750w PSU Inside ASUS Vento 750w Inside

Starting off with the basics, the internal layout of the U-75HA is quite tidy with all cables neatly zip-tied together to keep them well out the way of fan blades. Two black aluminium heatsinks attached to the mosfets span the length of the unit, and finned areas of the heatsink increase the surface area making better use of the 135mm fan that would normally be positioned directly above.

ASUS Vento 750w Capxon  Asus Vento Transformers

ASUS Vento 750w Ferrite Coil ASUS Vento RF Filter

Going in for a closer look we can see that the U-75HA features two 450v, 85c capacitors manufactured by Taiwanese company CapXon. Although we could argue that opting for 105c capacitors would help to increase the MTBF of the unit, CapXon are by no means a cheap brand and should definitely stand the test of time.

In the image top-right we can see the three main transformers of the PSU that perform the brunt of the voltage step-down to what is used inside the average PC. While the largest of the three is undoubtedly responsible for the 12v rails and the mid-sized one for the 5v and 3.3v rails, we're not entirely sure what role the smallest one plays.
ASUS Vento Fan

Finally we come to the 135x135x25mm manufactured by ADDA with a model number of ADN512UB-A9. Unfortunately even after a thorough search of Google and ADDA's website we was unable to dig up any airflow or noise output figures for this fan. All we can tell you is that it's black, has nine impeller blades, runs at 12v and consumes 0.44a...great!

Cable Configuration

The U-75HA has a total of nine cables extending from the unit  that branch out into 6xSATA, 6xMolex, 4xPCI-E, 1xATX, 1xEPS and 1xP4-12v connectors. This is about average for a PSU of this wattage although both the PCP&C Silencer 750w and the Be-Quiet Dark Power Pro 650w beat it by at least two additional connectors.

ASUS Vento 750w Cables ASUS Vento 750w Molex

Each and every cable on the unit is sleeved in a black mesh finished off  black heatshrink at the ends. Interestingly ASUS have decided not to carry the sleeving right the way into the PSU, instead stopping just a couple of centimetres short. Admittedly this doesn't exactly do much for the looks of the unit, but it does enable each of the nine protruding cables to have a much greater bend radius which could prove helpful if the PSU were to be installed in a confined space.

'Easy-plug' connectors have also been used on each of the six molex plugs to make removal from devices much easier.

ASUS Vento 750w PCI-E

Rather than having four PCI-E cables extending from the PSU for each of the four PCI-E plugs, ASUS have decided to 'piggy-back' two plugs off a single main cable. This reduces cable clutter when running Crossfire/SLI with high-powered graphics cards but does mean that if you only have a single card with a single PCI-E connector, you'll be left with a flappy bit of wire to try and tuck away. All four of the PCI-E connectors are capable of being converted into either 6-Pin or 8-Pin to suit all graphics cards.

 ASUS Vento 750w ATX ASUS Vento EPS
The ATX cable is native 24-pin with no way of reducing it down to the older 20-Pin standard (unless you are handy with a junior hack-saw?). In all honesty this shouldn't be an issue as almost all modern motherboards use the 24-Pin ATX headers anyway. Additionally a lot of the 20+4 Pin ATX connectors are a right pain in the rear to 'couple-up' before inserting them into your motherboard - anybody who's ever tried it will probably understand what I mean!

Legacy connectors haven't been completely ditched however, with the unit providing a separate cable for low-end motherboards (mostly mATX) that still use the 4-Pin 'P4-12v' connector.
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Most Recent Comments

24-01-2009, 14:24:03

"ASUS made their entrance into the PSU market with the U-75HA. But has it got the goods to stand out from the rest of the crowd?"

ASUS U-75HA 750w ATX PSUQuote

24-01-2009, 15:35:15

So this fails at 100% load (outside the ATX standards which lets face it are pretty lax) on the 3.3V rail and the 12V is down a long way too. I wouldn't use it with my rig (even if it provided enough power, but you get the point). In my books, Asus should have put it at 700W or so to ensure it didn't go outside the ATX standards. In addition, its dissapointing to see a no name fan and 85C capacitors.

All in all a bit of a dissapointing product. I'm not sure it deserves the 7.5 performance really.

Still nicely presented and great review, nice to see temperature readings and finally have a look at the PSU tester.Quote

24-01-2009, 15:50:55

Asus are an odd company. Their hardware is usually brilliant, their software less so. They've done well to build up a loyal fanbase but seem to be hoping to work on name value alone with this. Strange.

Great to see the new bit of kit put to good use. Power supplies are something people tend to overlook when buying hardcore hardware, even though it's the heart of the machine, so to get some serious numbers is fantastic!


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