Overclock.net › Components › Power Supplies › SeaSonic SS-660XP 660W ATX12V / EPS12V 80 PLUS PLATINUM Certified Full Modular Active PFC Power Supply

SeaSonic SS-660XP 660W ATX12V / EPS12V 80 PLUS PLATINUM Certified Full Modular Active PFC Power Supply


Pros: Stable, Quiet, Compact.

Cons: Labels

This PSU is best in class IMHO. Power to burn, extreme stability compact size and quality componants make it a no brainer for Gamming PC's that don't need extreme power. Technicaly this could handle 2 mid range GPU's a high end CPU and lots of extra's and not even blink. Some like to overpower and that's OK but for me this would easily handle 2-7870's or 670's and a 3939k or FX 8350 without any issues. Modular cables are a bit stiff but the sleeved replacements are easy to find and that's what I plan on. I don't like the spec. label showing when you mount it fan down, which I have to due to the AF 140 in the bottom of ny case but Seasonic is sending me stickers to mount on it to show off the brand. Obviously Seasonic is one of the best so you might want to show it off.Plugs fit tight cables are long enough for a Mid tower and some full towers right out of the box.


Pros: Fully Modular, 80 PLUS Platinum, Excellent Voltage Stability, Very Low Ripple, Seasonic Quality

Cons: Cost

The Seasonic SS-660XP is, in my opinion, the best power supply you can buy for the 600-700W range. It features Seasonic's legendary quality, 80 PLUS Platinum efficiency, and a fully modular design for easy cable management. What does 80 PLUS Platinum mean you ask? That means that at 20%, 50%, and 100% load the unit will perform at 90%, 92%, and 89% efficiency respectively. This means that whatever wattage goes in, you will get about 90% of that out. This means a lower power bill and less heat as the all the energy not outputted is lost as heat.

Here we see the front and back of the box. The back highlights some key features of the unit. These include the 80 PLUS Platinum efficiency, patented DC to DC technology, tight voltage regulation, and their Hybrid Silent Fan Control system with a Sanyo Denki- San Ace fan.

Next we see the side of the box with tech specs and connector information. The 660XP is able to supply all of its rated wattage on the 12v rail which is great for multi-GPU setups or extreme overclocking.

Included in the box we get some zip ties, screws, Velcro straps, a user’s manual, a warranty and RMA card, the thick power cable, a bag holding all of the modular cables, and the unit itself in a plush back in foam padding. Seasonic is serious about their shipping safety.

Inside the cable bag we get (from top to bottom counter- clockwise) the main 20+4 pin ATX power cable, a 4+4 pin CPU cable, an 8 pin CPU cable, 4x 6+2 pin PCI-E cables, 2x 4 output SATA cables, a 2 output SATA cable, a 3 output Molex cable, a 2 output Molex cable, and a Molex to Floppy adapter. All of the cables are black and in ribbon format except the 20+4 pin ATX which is in a traditional sleeved bundle.

Here are the cable lengths

Now on to the PSU itself. We can see the nice plush bag with the Seasonic logo in Platinum.

Here are some shots of the unit up close. You can see the rated output for each voltage along with the numerous certifications.

Here is the back of the unit with honeycomb ventilation. This will allow great airflow to keep the unit cool.

Here is the front or business end of the power supply. You can see the fully modular design as well as a stick talking about their hybrid or normal fan design. More on this later.

Here is what the unit would look like with all the modular cables plugged in. I would not recommend doing this as you will definitely overload the unit. This is one of the beauties of a fully modular design. You only need to plug in what your system requires.

Now onto the internals. Here we see the Sanyo Denki- San Ace Fan. Like I mentioned before there are two different fan modes: Normal and Silent. These will switch between silent then cooling and Fanless then silent then cooling as the temperature ramps up. The fan is very quiet anyway so I don't see a need to use one over the other.

With the fan removed we see all the components inside. There is excellent shielding between components and the soldering looks very solid. This is a very high quality power supply.

Now on to performance testing. As you can see the 660XP is well above the 80 PLUS Platinum requirements. The voltage regulation is also phenomenal. I only observed a 1% deviation in voltages from idle to full load. This is a power supply that I could safely call "90 PLUS" efficient. For a more in depth analysis of efficiency, you can head over here

The only possible negative I can see is the price. You will be paying between one and half to two times as much for this unit. $150 is quite a lot for a 660W power supply. There are plenty of great power supplies for under $100. If you are looking for Platinum efficiency though, this is not an unheard of price.

In conclusion, if you are looking for the most efficient power supply you can get, and have the money to spend, I would most definitely recommend this power supply. If you use it for long enough, it should be a worthwhile investment as you will save money on electricity.
SeaSonic SS-660XP 660W ATX12V / EPS12V 80 PLUS PLATINUM Certified Full Modular Active PFC Power Supply

The Seasonic Platinum Series features a high-tech LLC/full-bridge circuit topology with a unique integrated DC Connector Panel with an embedded Voltage Regulator Module. This design contributes to a near-perfect DC-to-DC conversion that optimizes efficiency by reducing current loss and impedance.

Model Name/TypeMPNEAN/UPC
Overclock.net › Components › Power Supplies › SeaSonic SS-660XP 660W ATX12V / EPS12V 80 PLUS PLATINUM Certified Full Modular Active PFC Power Supply