Seasonic Snow Silent 750W Power Supply Review

Recently, Seasonic introduced a new 750W Snow Silent unit, featuring Platinum-rated efficiency, fully modular cabling and semi-passive operation.

Until now, Seasonic offered only one PSU in its Snow Silent series, which was geared mostly toward enthusiasts. With 1050W capacity, the Snow Silent 1050 offers a power level that is overkill for many systems, so the company acted wisely by releasing a 750W Snow Silent unit. Besides being a lot quieter than the rest of the Seasonic PSUs in this category, both Snow Silent models feature a unique look attributable to white paint and a nicely brushed frame around the fan grill. Silver lines on the sides of the chassis add a classy touch as well. Despite so many companies in the PSU market, white power supplies are still relatively rare. And although the color makes it more difficult to take pictures of these PSUs, we have to admit that they look great installed in a white case. The only thing we would suggest to Seasonic is that it should bundle white modular cables instead of black ones.

All of Seasonic's high-end PSUs use 120mm fans, which means that they're noisier compared with the competition, which uses 140mm fans. Nowadays, in addition to high performance, many users also want a silent PSU, which is what led to the introduction of the Snow Silent series. The Snow Silent PSUs offer significantly lower noise output than Seasonic's SS-1050XP3 at all load levels. Both power supplies are based on the same platform, except for the Snow Silent series' fluid-dynamic bearing fan. The FDB fan, with its more relaxed fan profile and longer semi-passive mode, is what facilitates quieter operation.

Specifications

The Snow Silent 750 has many similarities with the 1050W unit, including Platinum-rated efficiency, fully modular cabling, a maximum operating temperature of 50 degrees Celsius for full load operation, a full set of protection features and the seven-year warranty. However, the 750W PSU has smaller dimensions than the Snow Silent 1050 since it uses a smaller PCB and doesn't need such a large enclosure. The second crucial difference between the two Snow Silent units is what you'll pay for them. Unfortunately, there is no information on what the Snow Silent 750 will cost, though.

Power Specifications

Rail
3.3V5V12V5VSB-12V
Max. PowerAmps2525623
0.5
Watts125744156
Total Max. Power (W)

750

The +12V rail can almost deliver the unit's full power alone, and with 62A on this rail, the Snow Silent 750 can power two high-end Nvidia graphics cards. You'd have a harder time with a couple of flagship AMD boards peaking at over 300W each, though. The minor rails are pretty strong and the 5VSB rail has enough amperage for a 750W PSU.

Cables And Connectors

Modular Cables
DescriptionCable CountConnector Count (Total)
ATX connector 20+4 pin (610mm)11
4+4 pin EPS12V (660mm)22
6+2 pin PCIe (610mm)44
SATA (400mm+110mm+110mm+110mm)28
SATA (300mm+110mm)12
Four-pin Molex (400mm+120mm+120mm)13
Four-pin Molex (300mm+120mm)12
FDD Adapter (+110mm)11

The Snow Silent 750 has an adequate number of connectors. However, some high-end 750W PSUs come with even more PCIe connectors. In our opinion, four of them, along with two EPS connectors, is more than enough for a PSU of this capacity. In addition, all cables have sufficient length. Distance between the connectors is good too, especially the four-pin peripheral ones. Seasonic also provides two short SATA and peripheral cables with two connectors each, for usage in smaller cases. Finally, all connectors use 18-gauge wires, which are recommended.

Power Distribution

Since this PSU features a single +12V rail, we do not have anything to say about its power distribution.

MORE: How We Test Power Supplies
MORE:
Who's Who In Power Supplies, 2014: Brands Vs. Manufacturers
MORE:
All Power Supply Articles
MORE:
Power Supplies in the Forums

This thread is closed for comments
20 comments
    Your comment
  • dragget
    "Unfortunately, the on/off switch for toggling hybrid mode is located on the back side of the PSU, so accessing your system's internals becomes necessary if you want to change fan modes."
    Most likely they did it this way to avoid having two switches on the outside face of the PSU. If they had placed both switches there I can see people reaching around the back of their case to change fan modes and accidentally turning off their PC because they flipped the wrong switch.
  • g-unit1111
    This would look awesome in my H440!
  • Adroid
    Yea to be honest I prefer the fan/hybrid toggle on the INSIDE of my case anyway. I put my Seasonic Platinum 650W in hybrid mode a long time ago and forgot about it.

    I don't see any need to flip the switch on and off, in fact I can't think of a single good reason why I would ever want to touch the thing again. So for me, it would be a con to have the switch on the outside of the case.
  • Aris_Mp
    this switch is much smaller than the on/off one so it is really hard to mix them up. Also the on/off switch is harder to activate. In any case as a reviewer I see this as a con, not a serious though. Some users out there will share my opinion while others won't.
  • dragget
    Quote:
    this switch is much smaller than the on/off one so it is really hard to mix them up.

    If you were looking at the back of the PSU, then yes, but I'm assuming the more common situation where the user is reaching around the back of the case where they can't see. In this scenario, one would have to feel around the back with their hand so it's much easier to get it wrong. I almost never use the switch on the back of my PSU, so every two or three months when I DO use it, I have to fumble around in the back to find the switch. For your average user, having two switches back there would just be asking for trouble.
  • MasterDell
    A lot of companies are putting the hybrid switch on the inside of the PSU. Just like the new units EVGA is putting out. It makes no sense to put the switch on the outside due to confusion with the on/off switch
  • LookItsRain
    180 dollars for this? No.
  • JQB45
    I'd pay $150-$180 USD for this PSU and not just because its pretty.
  • dstarr3
    Quote:
    180 dollars for this? No.


    For a rock-solid PSU with a 7-year warranty? This thing would power my next three or four computers. $180 for not having to buy another PSU for a decade is a damn good deal.

    Regarding the fan switch, my PSU has a similar feature, and honestly, I imagine most people would set it at installation and never change it. I sure haven't.
  • Aris_Mp
    Indeed a PSU is an investment, something that unfortunately most people cannot see or understand while on the same time they have no problem spending serious money on GPUs and CPUs.

    You can keep a good PSU for many system builds while a not reliable, cheap PSU besides breaking down fast can also destroy many of your system components.
  • JackNaylorPE
    Been looking for this on jonnyguru.... the 1050 watter scored a 10 in build quality and performance. My son bought the 1000 G2 cause it was cheaper than the 750 at the time.... the 1000 G2 is way too dang noisy. This wuda been nice.
  • LookItsRain
    68185 said:
    I'd pay $150-$180 USD for this PSU and not just because its pretty.


    I paid 54 dollars for a psu that its damn near the same quality.
    http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story6&reid=393

    This psu in this review is horrendously overpriced.
  • MasterDell
    1333631 said:
    68185 said:
    I'd pay $150-$180 USD for this PSU and not just because its pretty.
    I paid 54 dollars for a psu that its damn near the same quality. http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story6&reid=393 This psu in this review is horrendously overpriced.

    Getting a good deal on a PSU that was released a while ago is one thing. That PSU had and has an MSRP of $90. Not $54. It's also bronze rated. Not saying that is a bad thing or a relevant thing, but efficiency does affect the MSRP of PSU's.
  • JackNaylorPE
    1. The current price is MSRP and will hold until there's some competition from vendors. The 1050 came out at $255 ... its $202 now; once there are enough supplies in the channel, it will be $139-$144 ... probably less

    2. My son has a 1000 watt G2, I'd pay $50 if I didn't have to hear that fan all day, The G2 matched the performance and it's $105, the HX750i is surely worth the extra $10... The Antec HCG matches the BQ and it's $85

    3. But like anything else, if you want that binned GPU, the best overclocking MoBo, the price premium suffers from the law of diminishing returns. Michael Phelps made millions coming home from the Olympics with Gold Medals .... how much did the guy with the silvers make ?

    4. It is damn perty :)

    A real nice street racing engine might cost ya $15k .... wanna take 2/10's of a second off that and ya can spend $50k
  • g-unit1111
    1903369 said:
    Indeed a PSU is an investment, something that unfortunately most people cannot see or understand while on the same time they have no problem spending serious money on GPUs and CPUs. .


    Yeah exactly it's an investment as much as the actual PC itself is. And I've seen enough builds on this site where I almost instantly recommend that people spend more money on a PSU. You're paying $350 for an i7 and $600 for a GTX 980TI, yet you won't pay more than $75 for a Corsair CX750. I mean WTF??? Like 99% of the time on this website the answer to most people's problems with their system is "buy a new PSU". And it is really sad when people don't see that's a huge investment.

    Quote:
    Been looking for this on jonnyguru.... the 1050 watter scored a 10 in build quality and performance. My son bought the 1000 G2 cause it was cheaper than the 750 at the time.... the 1000 G2 is way too dang noisy. This wuda been nice.


    I have both 850W and 750W versions of the G2 and I've never seen an issue with either one in regards to noise.
  • junkeymonkey
    lots of folks just don't see a psu is the hart and life blood of a build and top stable build quality goes a long way.. spend 2000 bucks on a build and 64.95 on a psu .
  • JackNaylorPE
    537231 said:
    Yeah exactly it's an investment as much as the actual PC itself is. And I've seen enough builds on this site where I almost instantly recommend that people spend more money on a PSU. You're paying $350 for an i7 and $600 for a GTX 980TI, yet you won't pay more than $75 for a Corsair CX750. I mean WTF??? Like 99% of the time on this website the answer to most people's problems with their system is "buy a new PSU". And it is really sad when people don't see that's a huge investment.


    Especially when a 750 watt EVGA B2 is like $55

    Quote:
    I have both 850W and 750W versions of the G2 and I've never seen an issue with either one in regards to noise.


    Well... it's a matter of perspective. If you have two Gigabyte G1's, twin CPU fans, and say 6 case fans, you're not going to hear the PSU fan ... but if you invested a boatload of money in water cooling components, the radiator fans are spinning at 350 - 500 rpm under normal usage. The noise associated with that is below the audible range of hearing. To have that peace and quiet disturbed and your investment negated by the lack of a quiet PSU fan is disheartening.
  • turkey3_scratch
    It's about time we get a white PSU.
  • JackNaylorPE
    Well there was this .... and it was $180 five years ago.

    NZXT Hale90 850W (9.5 performance / 10.0 build quality)
    http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=199

    This is better and cheaper considering inflation.
  • DookieDraws
    That sure is one sexy PSU! I have the Seasonic 660W Platinum PSU, but I might haver to kick her to the curb for this fine young lady. I can just see her sitting inside my Enthoo Pro, now. That big window on the side of my Enthoo Pro would show her off real nicely. :P

    Nice job, Seasonic!