Reviews - AcBel Polytech R9 900W
Sample Provided by: AcBel Polytech (By OklahomaWolf on Tue, Nov-23-2010)

Page 1 - First Look

Good day to you, good readers, and welcome once again to - the site where all your power supply torture and destruction needs are met. Some of you appear to be asking why you don't see the usual power supply retail box pictured directly above this sentence. Well, sometimes they come to me like this - an OEM unit with nothing but a power cord to keep it company.

And what is this unit we are looking at today? Why, it's only the second AcBel Polytech unit to get tested at this here site. This time, instead of arriving under the Coolermaster moniker, we have an honest to goodness actual AcBel unit to test. This is a unit that is not currently available in North America, so I want to see if the performance is good enough to make AcBel set up shop on this side of the pond. But before I get to all that load testing stuff, there are a few more product pictures to look at. Let me just get this plastic off the unit first, and I'll show you the unit proper.

This is the R9. An 80 Plus Gold rated unit with quad 12V topology and a special AC power receptacle, like the ones used on the really big Enhance units like this one. While I will admit that it is cool seeing such a thing on a power supply, it does make it a little more challenging to find a new power cord should you lose the C19 equipped dealie that comes with the unit.

Like all great power supplies, this one is done up in an ultra rugged matte black finish. It also does my heart good to see the wires get the sleeving treatment right up into the case, for a lot of these server grade units don't tend to care as much about the sleeving. It's an afterthought these days, like pop singers that can actually sing, rappers that can actually rap, and songs not written for cellphone ringers.

A look at the exhaust grille shows us that way cool C19 connector, as well as a view of a really packed interior. There also appears to be a hole for a status LED. That might have been cool to find in this unit, but I'm not going to cry over its absence. Usually those status LEDs make these things harder to get apart.

Here's a better look at the C19 connectors on both the unit and the power cord. Interestingly, the power cord has a massive ferrite bead around it, to assist with EMI suppression. I don't think I've seen that before, at least on the power cord.

This is the front of the unit, with a barely legible AcBel logo stamped on it. It's kind of cool looking, methinks.

Another angle for you. This is about as clear as I could get that logo to show up. While some may be concerned with the lack of a grommet around the cable exit, yours truly is not worried. The metal is folded over, and not sharp. The cable sleeving alone should be enough to protect the wires inside from damage.

This is the fan - a 120mm model with a 90 Plus logo in the grille hub. Technically there is no 90 Plus certification, but the unit is certified 80 Plus Gold so I suppose we can let this slide. A lot of companies do this, so it's not fair to come down on AcBel for being a "me too." As long as we see Gold performance in the load testing, that is.

The label for the unit. As you can see, this is a quad 12V design with four 25A 12V rails. While this does seem a little bit low-ish, if AcBel did their job right there shouldn't be any resulting shutdown issues. Additionally, this unit relies on the VRM approach to drive the two minor rails - as a result, you can pull up to a whopping 71.8A off the 12V rails. That's pretty close to the full output capacity of this unit.

In an interesting move, AcBel has also provided us with a stronger than normal 5VSB rail. This rail is powered by a completely separate module mounted right at the exhaust grille. I like this idea... it puts the parts that are always active right there by the fresh air where they can at least be somewhat cooled when the unit's fan is not running.

AcBel R9 900W 3.3V 5V 12V1 12V2 12V3 12V4 -12V 5VSB
25A 25A 25A 25A 25A 25A 0.5A 4A
Max Power 155W 860W 6W 20W

A good old fashioned tentacle shot rounds out the first page of my review. As you can see, there are no less than six 6+2 pin PCI-E connectors, and all three of these chains have their own 12V rail. AcBel got smart with the 12V distribution... while the peripheral connectors are on 12V1 with one of the PCI-E chains, the CPU connectors get one whole rail to themselves - 12V2. Your CPU gets 25A all to itself. That's more than enough.

Type of connector: AcBel R9 900W
ATX connector (540mm) 24 pin 12V1
5.25" Drive (550mm+95mm+95mm) 3
3.5" Drive connectors (+95mm) 1
SATA (550mm+95mm+95mm+95mm) 8
SATA (550mm+95mm) 2
5.25" Drive (+95mm+95mm) 2
8 pin EPS12V (540mm) 1 12V2
4+4 pin EPS12V/ATX12V (540mm) 1
6+2 pin PCIe (560mm) 3 12V1/
6+2 pin PCIe (+95mm) 3
Unit Dimensions (L x W x H)
190mm x 150mm x 86mm

One last item to note before I go on to the next page. Like some recent units this one has a combined Molex/SATA cable on it for those of you that still run a combination of peripherals. Nice touch, AcBel. And look at that - we have a total of ten SATA connectors. While these are all on 12V1, this may be a good candidate for those running lots of hard drives, especially with the 45A OCP trip point claimed by AcBel on those 12V rails.


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