Reviews - Seasonic SS-500L1U Industrial Power Supply
Sample Provided by: (By OklahomaWolf on Tue, Feb-28-2012)

Page 1 - First Look

Hello, folks. I was going to do something different today and write this article in the voices of my childhood imaginary friends. Then, logic and reason got a hold of me and pointed out that it was unwise to not only scare off my readers, but also to let several of them get out of their mental cages and run amok within my psyche. So, I'm not going to get that crazy on you... this time.

Today, I'm looking at something a little different from the norm in the Seasonic 1U form factor SS-500L1U. Once in a while, we do like to have a look at the server side of things, and this is most definitely a server power supply.

Now, this isn't just any ordinary server unit, here, this is one that is certified 80 Plus Gold. And because it is so efficient, it adds a feature not normally found in server units - semi fanless operation. That's right, the unit goes fanless to a point. What point is that? We'll find out later.

For now, let's take a look at the unit and its bland, boring flat gray housing. Yeah, yeah, I know, I know. Server units aren't supposed to be pretty. And this is even less pretty than most, omitting a cover over the modular cable side of it. Did I mention this unit is fully modular? No? Well... it's fully modular. Sort of. More on that later.

Here's the exhaust end of the unit. An AC receptacle, a wee fan, and a wee power switch. But no Wii. So, you really can't go wee wee Wii all the way home with this unit.

Wow... I think I even made my ancestors groan with that joke.

The modular connectors. The interface here is somewhat different than we're used to in the enthusiast market in that only four connectors are found on here, shared among several cables. The ATX cable uses the ten and eighteen pin connectors. The 12V cables, including the PCI-E and all ATX12V cables, use the twenty-four pin connector. Finally, the peripheral cables share the twenty-two pin connector on top.

So, this unit is only fully modular in the sense that you can unplug the cables from the unit. You aren't actually able to detach individual cables you don't need, unless you have a total lack of any peripherals or something like that.

Here's the unit from the top, showing a grille about midway down on the unit. Those two screws attach to heatsinks inside for a little extra heat sinking. Over by the fan is a sticker that indicates the fan may not run with any load under 50% of full power.

Seasonic SS-500L1U

+3.3V +5V +12V1 +12V2 -12V +5VSB
20A 20A 20A 20A 0.3A 2.5A
Max Power
@ 50°C
100W 480W 3.6W 12.5W

A label and a table. I didn't see any specific operating temperature spec indicating what this unit could handle when running full bore, but the literature I was given did hint at me that it could handle fifty degrees. So, I put that in the table. We'll find out later if I am able to get the hot box hot enough on such a small unit to verify this number.

Here are the modular cables... all three of them. See what I mean about not being able to detach unneeded ones? And sleeving? You're out of luck, there.

Here's the ATX cable now. You plug the end with the dual connectors into the power supply. And yes, I do have to tell you that because it's also possible to plug the other end into the unit as well, where the 12V cable goes. Pay attention when you're hooking this one up.

The 12V cable. The single connector end goes into the PSU. You get one modular 4+4 pin ATX12V connector, one 8 pin EPS12V connector, and one 6 pin PCI-E connector.

Lastly, here's the peripheral cable. You probably don't need me to tell you which end goes into the unit. Do you? Fine...

Here. This is how you plug these cables in. Now for a table.

Type of connector: Seasonic SS-500L1U
Modular Cables
ATX connector (460mm) 24 pin 12V1
5.25" Drive (450mm+150mm) 3
3.5' Drive (+150mm) 1
5.25" Drive (350mm+150mm) 2
SATA (450mm+150mm) 4
4+4 pin EPS12V/ATX12V connector (460mm) 1 12V2
8 pin EPS12V connector (460mm) 1
6 pin PCIe (600mm) 1
Unit Dimensions (L x W x H)
235mm x 100mm x 40mm


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