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Item#: N82E16817151068

SeaSonic M12D SS-750 750W ATX12V V2.3/EPS12V V2.92 SLI Ready CrossFire Ready 80 PLUS SILVER Certified Modular Active PFC Power Supply

  • ATX12V V2.3/EPS12V V2.92
  • Modular
  • 80 PLUS SILVER Certified
  • 100 - 240 V 50/60 Hz
  • +3.3V@24A,+5V@30A,+12V1@38A,+12V2@38A,-12V@0.8A,+5VSB@3.0A

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  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the SeaSonic USA M12D SS-750

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years
  • Read full details

Customer Reviews of the SeaSonic USA M12D SS-750

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  • Anonymous
  • 11/20/2013 4:43:35 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsRunning strong since 2010

Pros: Stable. Great design and build quality, although not an X-series which came out after purchasing this...

Cons: Not FULLY modular, not the revolutionary X-series.

Other Thoughts: The X-series revolutionized PSUs, but I've been running an OC'd i7 920 system with a full-featured board and many peripherals since 2010 (over 3 years) off this PSU with zero problems. It's still going...

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  • Jeffrey W.
  • 7/13/2009 8:48:10 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year

5 out of 5 eggsSolid PSU

Pros: 1) Does what it supposed to
2) Excellent Quality

Cons: 1) none

Other Thoughts: Seasonic is the OEM for alot of companies. So the alot of those Antec, Corsair and long list of others are really Seasonic PSU with a few mods from the companies listed.

Kinda Like the LCD screens, Samsung supplies the Tube or LCD screen and companes like sony add their own 'Guts' to refine it.

1 out of 1 people found this review helpful. Did you? Yes No

  • Mark H.
  • 7/8/2009 5:30:35 PM
  • Tech Level: High
  • Ownership: more than 1 year

1 out of 5 eggsDon't buy one of these!

Pros: 1 of 4 i bought is still working.

Cons: 3 of 4 i bought FAILED in the first 3 months or less of use.

Other Thoughts: I will never buy a SeaSonic product again. I was building two computers at the same time and i bought two backup power supplies since these were critical machines. Good thing i did, because one power supply failed on initial power up. Two other power supplies failed within the first three months of use. This was in both machines. All failures were accompanied by a loud pop, sizzling and smoke. These are obviously not good products.

0 out of 17 people found this review helpful. Did you? Yes No

  • Scott M.
  • 6/13/2009 2:15:19 PM
  • Tech Level: Somewhat High
  • Ownership: less than 1 day
  • Verified Owner

3 out of 5 eggsTop Rated PSU

Pros: Has all the goodies.

Cons: Not impressed w/ the quality of the Molex connectors. Had trouble w/ 2 of them - pins not aligning w/ female side connectors. Also, hard to visually recognize the correct orientation of the plug. Disappointing quality for such a "top quality" product.

Other Thoughts: Haven't fired up the system yet - still building. So I really can't evaluate all of the PSU's functions.

2 out of 11 people found this review helpful. Did you? Yes No

  • Anonymous
  • 6/1/2009 10:40:26 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsSolid as always

Pros: Solid high-tolerance components, stable rail measurements, excellent cooling design, high efficiency.

Cons: None that I have found.

Other Thoughts: As always, you get what you pay for. The higher quality design of these PSU units aren't cheap to build, and thus the price. I have personally workbench stress-tested a few of these Seasonic PSU units over the past few years and their overall stability is impressive. These have been, and will be the only PSU units I will use or recommend.

2 out of 2 people found this review helpful. Did you? Yes No

  • Anonymous
  • 5/16/2009 4:16:30 PM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsWhat noise

Pros: pleanty of power, quiet, efficient.

Cons: None, maybe a little expensive, but i knew price before i purchased it

Other Thoughts: powering AMD Phenom II 940, 2-500 gb hard drives, GTX 285, many fans, 2- DVD drives, 8gb memory. no problems at all

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  • Derek F.
  • 3/11/2009 10:37:45 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

2 out of 5 eggsLoud high pitched noise

Pros: works.
fan is pretty quiet, especially low load.

Cons: Makes high pitched squeeling noise constantly, even when computer is off, i have to switch off my battery backup to make it go away.
Pitch of the noise changes under different loads.
When i power on the computer, noise changes, but continues.
when i plug in USB devices noise changes but continues.
Lots and lots of bad reviews

Noise is very similar to the ear tests they gave kids in school, raise your hand if you hear the high pitched noise in this ear or that ear.

Other Thoughts: Going to attempt to RMA this psu today and buy a different one, too many reviews say it just plain exploded to try and replace with another one.

I RMA'd my foxconn motherboard thinking thats what the noise was the first time, sorry newegg and foxconn :(

3 out of 10 people found this review helpful. Did you? Yes No

  • Steven S.
  • 2/5/2009 8:35:32 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsSo far so good!

Pros: Modular, San Ace fan, Silver certified, extremely stable and efficient, quiet. For the previous reviewers below and future, the problems with the soldering have been remedied by Seasonic. They pulled them, fixed the problems, then distributed them all over again. I do my research extensively before I buy and I like the very best. Kind of obsessed with quality and efficiency. Check the review sites-seriously one of the best ever.

Cons: Some may say price, but Seasonic didn't cut any corners with this PSU so why should they sell it for the same as those that did?

Other Thoughts: Q9650//TRUE Cu-both mirror lapped w/ ICD 7 and washer mod//ASUS Rampage Formula//Mushkin DDR2 1066(4x2)//this PSU//WD Velosiraptor 300gb//EVGA 285GTX//San Ace fans(all) (3)120x25(2)120x38(1)140x38//Creative X-Fi Titanium//Lian Li PC A17b

6 out of 6 people found this review helpful. Did you? Yes No

  • Bryant M.
  • 1/12/2009 5:47:50 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsExcellent Performance Thus Far

Pros: All cables are sleeved and color coded. Modular cable system keeps the case interior clean. Four 6/8 pin PCI-E connectors provides for SLI/Crossfire setup. The unit is nearly silent under moderate load. Removable fan grill.

Cons: Other than high price, none so far.

Other Thoughts: Currently running Intel Core i7 920, ASUS P6T Deluxe, Corsair Dominator TR3X6G1600C8D, Sapphire 100259-1GL Radeon HD 4870 1GB, dual Western Digital RE3 WD7502ABYS hard drives.

4 out of 4 people found this review helpful. Did you? Yes No

  • 1/2/2009 7:27:46 AM
  • Tech Level: Average
  • Ownership: less than 1 day

5 out of 5 eggsGood Review from

Pros: "The M12D 850W is a worthy addition to Seasonic's lineup as its new flagship product in this age of superpower PSUs. The electrical performance of our sample was consistently excellent. Voltage regulation and AC ripple were outstanding. Energy efficiency was excellent, as befits a Silver 80 Plus model. Power factor and cooling were fine, and the build quality, classically Seasonic: Neat and tidy. The technological advancements such as DC-to-DC conversion for the sub-12V lines, high quality Japanese capacitors, and the superb Sanyo Denki fan are well worthwhile.

Acoustic performance is audibly if incrementally improved over all previous Seasonics, mostly due to the excellent low speed performance of its exclusive San Ace 120 fan, and the high efficiency which allows adequate cooling with very low fan speeds. The overall noise at low to medium-high loads is good enough to be tied for best place."

Cons: "By 400W, however, the noise level jumped and continued to rise quickly at higher loads in our test setup. As with most power supplies, the trick for silencers is to keep the power demand below the level where the fan controller pushes the speed up, and to keep the PSU as cool as possible.

It is no surprise that our high power test results don't match the 80 Plus test results which led to the M12D 850W 's Silver rating. The same holds true for the measured efficiency of every PSU we've tested over ~400W load. Our test procedure is much tougher thermally than the 80 Plus test, and power supply efficiency is strongly affected by operating temperature. Too low or too high, and efficiency suffers; there is an ideal plateau temperature range that enables PSUs to achieve optimum operation. We believe our test procedure to more realistically replicate the thermal conditions in actual use, although as discussed earlier, at >600W loads, the test box is probably not cooled well enough."

Other Thoughts: "All in all, the M12D 850W is a very good achievement for Seasonic. The company has clearly joined the power race of retail PSUs but without abandoning the acoustics and efficiency conscious design that has kept its products at the top of the SPCR recommended PSU lists for so many years. Whether the hefty price tag is justified depends, as usual, on the perspective and needs of the individual consumer. For a modest power user ot typical silent PC enthusiast, definitely not. For a typical gamer, perhaps not; the sound effects of the games might drown out enough of the computer noise. But for a gamer who wants both high power stability as well as whisper-quiet performance from his PSU, the M12D 850W is a perfect fit."

10 out of 13 people found this review helpful. Did you? Yes No

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Item#: N82E16817151068
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