Pros: >super quiet, even under load >flat, black cables >80+ Gold Cert >Full modular >extremely well packed, save for a lack of cellophane.

Cons: >Cables are a little short >It really is meant to be installed fan-up

Overall Review: I have only heard the fan spin up once actually, and this bad boy is powering a GTX 760, 4 sticks of DDR3, 5 HDDs, 1 optical, and a 3770K OCed to 4Ghz. It takes BF3 set to Ultra across the board and a series of busy scenes to get the active cooling to engage. Now, I admit, I do not know exactly *how* this unit engages it's active cooling. I do not know if it is looking at the load that is under, or if it approaches/surpasses a certain temperature. I have a HAF X, under Posi-pressure, so I am inclined to say that it is the unit temp that engages the fan. As for the cables, I do have this in a HAF X, so that certainly doesn't help. But cases have only just been getting bigger. The HDD cable I wanted/had to use was just barely long enough, same for the SATA cable I ran to optical drive. The PCIe cable was also just barely long enough (it doesn't look very neat). But all of these cables would have been too short if I had installed the unit fan-down (as I initially tried to do). The HAF X has a vent for PSU fans that I like to take advantage of; give it a dedicated cold-air supply. But this simply wasn't going to work. I could buy extensions - and already use them for the 24pin and 8pin CPU - but for the expense in that, I would rather just make a set of sleeved cables for my case. The unit was very well packed. Velvet bag, inside of closed-cell foam box, cables bagged in a reusable bag, etc. The only gripe I can offer is that the external packaging came without any kind of seal on it; cellophane or tape. You could just pop the box right open after taking it out of the Newegg shipping package. There was no sign of any sealing tape/sticker ever being on the box, so I'm guessing it's normally shrink-wrapped. This seems like it is becoming a more common occurrence with Newegg; opening a product for one reason or another. First package I've received where this had happened, but it is being mentioned more often on various forums. Luckily, everything was there and in "new" condition. I did not feel the need to contact them about it, but I do hope they read this. If they want to open something off their shelves, that is their choice. Just don't turn around and sell it as "new". All in all, nothing worth knocking an egg off for. It's a solid PSU, and I have no doubt that it will make it to the end of it's hefty warranty, and then some.

Pros: Single rail. 8 PCIE connectors. Quiet. Efficient. Quality all around.

Cons: N/A

Overall Review: You want a high quality PSU? This is the one you want.

Pros: It is a modular PSU with wrapped cabling. Helps with cable clutter and does not impede air flow like unwrapped ribbon cables. Each cable fits snugly into its designated slot (PSU and mobo) and they are easy to remove as well. This PSU provides an ample amount of power for the typical gamer. I'm running a Core i7-3770 K with 2x - GTX 660s in SLI and at max load with benchmarking software this PSU hardly breaks a sweat. Runs cool and it's crazy quiet, there is absolutely no coil whine with this unit. I like the addition of a switch to switch the fans from Normal/Hybrid. Haven't really seen much of a difference with Hybrid on though but it is still a nice function to have. PSU is on daily with 3-5 hours of daily use for gaming and video editing. Stays cool despite constant fluctuations in load as well as the noise. A plethora of accessories comes in the packaging such as a carrying bag, cable ties, etc. It's nice that to have that included velcro cable ties for proper cable management with the modular cables. I don't think I would be using the carrying bag anytime soon though.

Cons: Would have liked a few models with LED's to match with my case.

Overall Review: Overall this an excellent PSU. It runs cool, quiet and is very stable at max loads especially for gaming and benchmarking. The wattage provided should suffice for the average gamer but if you are looking for something more high end such as a Sandy Bridge E CPU with a GTX TITAN SLI, you may need to look for a a PSU with a higher wattage. Kind of a no brainer. I would highly recommend looking for a power calculator online to calculate your estimated power usage with the parts you are planning to use. Also like I mentioned earlier this PSU does not have any LED's but however is very stable. If you are looking for a PSU for a build you may need to weigh that option for there are not may LED PSUs that are stable as this unit.

Pros: Seasonic quality - they really are the best in the business when it comes to power supplies. This is my second Seasonic unit (first was an S12 430W) and everything about this PSU screams quality. It's whisper quiet. It comes well packed with everything but the kitchen sink. It comes in a velvet bag like a bottle of Crown Royal, and includes a rather nice and very well laid out supply of cables in their own container. Started up the first time without issue, and it's good to have a 100% modular unit to get rid of the rat's nest of wires that non modular PSUs leave behind.

Cons: None whatsoever.

Overall Review: The rest of the rig: Corsair Carbide 500R Seasonic X750 Gold Gigabyte GA-Z68XP-UD3P 3.1GHz Intel Core i5-3450 16GB Corsair XMS 3 RAM 1600MHz 1.5V OCZ Vertex 4 128 GB SSD 1TB Samsung Spinpoint F3 EVGA Geforce GTX 660 Plextor 880 SA DVD Burner Pioneer BDR-206

Pros: - Looks fantastic - Great packaging - QUIET - Fan doesn't come on unless the unit is loaded 20%+

Cons: None so far. I always choose SeaSonic for all my new builds. If you are spending hundreds or thousands on new components don't go cheap on the power supply! You wouldn't throw 87 pump gas into a brand new Bugatti Veyron.

Pros: 650W GOLD. Capable of handling SLI. Fully Modular(the cable clutter is non-exsistant) did i mention fully modular? incredibly well built psu.

Cons: Bit pricey.

Pros: Zero issues after 18 months ownership. Originally in a socket 775 system, recently transferred to a Z77 rig with two GTX 460's in SLI. 750 Watts is plenty for two modern video cards with single GPUs. Modular cables with plenty of SATA power cables/outputs - more than enough for my mobo and the number of drives I use. Build quality is excellent. No issues with coil whine or fan noise. If the fan does spin up I can't tell as by then the video card fans would be producing more noise of their own.

Cons: None for me.

Overall Review: Got this in a Newegg sale after reading Johnny Guru's excellent review of the unit. He gave it a 9.5/10

Pros: Bought this to replace an OCZ Modxstream 700w power supply that died and I'm happy to report that it's been running great for about a year now in a quad core system with 2 high end graphics cards. Fully modular, no coil whine on mine, whisper quiet fan thanks to high efficiency- high efficiency means less power wasted as heat and this power supply is cool enough that the fan will actually stop running when my computer idles. Awesome!

Cons: None really, this thing is fantastic.

Overall Review: All my main machines will run Seasonic from now on.