SeaSonic 650W Power Supply X650 SS-650KM3

I purchased this power supply in an attempt to reduce the jet-engine noise level on my system.A bit of back story: My previous 550 Watt power supply, manufactured by Ultra, was a nightmare. The first one had an unacceptable/poorly manufactured fan inside of it. I argued with Ultra for days about a replacement. The whole process was a nightmare. I finally received a replacement. And though it was functioning normally, it was VERY loud. The fan would operate at full speed. The only thing my computer needed was a pair of wings, and it might have passed for a jet. It also generated an incredible amount of heat. Enough was enough...I searched for some reviews on silent power supplies, and SeaSonic appeared on every search. Upon further searching, I found that there are some power supplies with "80 Plus" certification. Meaning that you'll get more efficiency out of your power supply. More efficiency = Less heat = Less fan noise. There are several levels of 80 Plus certification, each with increasing levels of efficiency: 80 Plus, 80 Plus Bronze, 80 Plus Silver, 80 Plus Gold, and 80 Plus Platinum.I ultimately decided to purchase this SeaSonic 750W X750 Gold Power Supply. Excellent decision.The packaging alone made me feel like I was going to be impressed. The embossed black and gold box made it appear sleek and elite. Upon opening, I found the power supply inside of a black velvet-like bag with gold writing on it. Cooool.Aside from the packaging, the product itself was very easy to install in my extremely quiet  Cooler Master HAF X  case. This particular case positions the power supply on the bottom, rather than the top. Didn't have any problems with positioning on the bottom. There is a vent on the bottom of the slightly raised case, allowing for the SeaSonic fan to pull outside air from it's own source.The power supply is modular, meaning that you can plug individual cables into it, based on your needs. The cables are covered in a black mesh/net material, which appears to be standard among today's power supplies, blends in nicely with the black case.And finally, the most important factor, the noise level. Virtually non-existent. This thing is completely silent, all you hear is a click when you turn on the system. The fan only turns on when power consumption is high and more heat is generated (which is minimal due to it's 80 Plus Gold certification). Even at full load, you can't tell that the fan is on. VERY impressive, a HUGE change from the Ultra power supply I had been using prior.If you want silence and performance. Don't even think about anything else, just buy this. Sure it's on the slightly pricey side, but you'll keep it forever.For complete silence, I opted for some other performance components: The  OCZ 60 GB Agility 2 Solid State Drive (SSD) , and the  Corsair H50 CPU Cooler  (no headache water cooling).Now when I walk in the room, I can't even tell that my computer is on. Perfect.

This is an amazing power supply that is definitely worth the price! I recently found that my old psu (Cooler Master) was the culprit of the loud annoying buzzing coming from my computer. It had steadily gotten louder over the 3 years I owned it. After doing some research I found that like many manufacturers, Cooler Master opted to use a cheaper sleeve bearing fan in its PSU. As many may already know, sleeve bearing fans are supposed to sit so that the airflow goes out the sides of the case not through the top or bottom. As most cases are now designed to have the psu fan pull from the bottom of the case, this makes for a PSU that will only last a few years ensuring future business. Armed with this knowledge I searched for a PSU that had a better quality quiet fan and stumbled on Seasonic. I liked the idea of a fan that only turned on when needed, and a high quality quiet fan to boot! With so many positive reviews behind it, I decided to give it a shot and try it out. Unfortunately when it arrived I found that there was a problem with the fan and it emitted a grinding noise when it turned on, and shortly thereafter shut off. I immediately contacted Seasonic about the issue. I was pleasantly surprised by how well they handled the situation. Not only did they address my concern by ensuring that this is not typical of the fan, they immediately replaced it. I was sent a replacement unit with a call tag to return the defective one so I would not have any down time. The replacement ran perfectly with no hiccups at all. I was able to fully push my computer with barely a hum comming from the power supply's quiet fan. I highly recommend this power supply. With a quality product and excellent service and a 5 year warranty to back it up, it is definitely worth the price!

Purchased the SeaSonic X750 Gold in Nov/2010, for a new computer build. It was delivered within about 10 working days in excellent condition. I have used the computer every day for two months without any problems with the power supply. It is very quiet. Even when the cooling fan comes on (rarely), I cannot hear it. The power supply probably exceeds the requirements for my system but it allows for future additions. I considered less expensive makes (Corsair, Asus, other good quality) but decided to spend a little extra because of the reviews. Manual is good and comes with many more power cords than needed for a new build. All the parts seem to be excellent quality. Would purchase - from Amazon - again.My computer specs: Cooler Master CM 690 II case, Asus P6X58D Premium Mobo, Intel Core i7 950 3.06GHz CPU, Corsair Dominator 6 GB PC3-12800 1600MHz Triple Channel Core i7 DDR3 CAS 7 RAM, Two Western Digital Caviar Black 1 TB Hard Drives, ASUS GTX460 1 GB Graphics Card ENGTX460, Viewsonic VX2739wm 27" Full HD LCD Monitor, Lite-On LightScribe 24X SATA DVD+/-RW Dual Layer Drive IHAS424-98, Windows 7 Home Premium 64.

First one came in and didn't work at start up. Replacement came in and did the job, still going strong.

J utilise souvent mon PC depuis fevrier 2014. 7 ans plus tard, la meme alimentation fonctionne toujours !

Died after an hour of use, couldn't get it to turn on no matter what I tried.

Ich habe mich für das Seasonic entschieden, da mein Gehäuse einen eingelassenen Handgriff besitzt und deswegen ein längeres Netzteil nicht möglich war. Außerdem ist es hier möglich zwei CPU-Powerkabel anzuschließen. also den üblichen 4/8 PIN und zusätzlich einen weiteren 8 PIN.Theoretisch ist der Gold-Standard ja mittlerweile von Platinum und Titanium überholt worden. Da diese jedoch Laut Spezifikation im Lastbereich zwischen 20 und 100%) nur ca 2-3% Sparsamer sind, lohnt sich rechnerisch der (fast immer) sehr deutliche Aufpreis nach nur wenig.Beim Auspacken kommt das Netzteil in einem schicken Täschchen, in dem man später seine übrigen Kabel aufbewahren kann. Es ist voll-modular und mit Flachbandkabeln aufgebaut, was einem beim Verlegen der Kabel einiges erleichtert. Kabel Management ist für mich mittlerweile ein MUSS, da man so die nicht benötigten Kabel nicht mehr wie früher im Gehäuse herumliegen hat. Alles wirkt dadurch sehr aufgeräumt und ist übersichtlich. Außerdem ist es viel einfacher die Kabel zu verlegen, da das Netzteil zuerst verschraubt werden kann und dann nach und nach jedes Kabel einzeln verlegt und eingesteckt wird.Ich habe den schalter der hybriden Lüftersteuerung auf "1" was bedeutet, dass der Lüfter ständig läuft. Die dabei verursachten Geräusche sind so leise, dass ich es nicht für nötig empfinde die Lüftersteuerung zu aktivieren (Schaltstellung "0"). Ist diese aktiviert, arbeitet das Netzteil bei geringen Lasten und bis zu einer bestimmten Temperatur rein passiv. Erst wenn einer der Grenzwerte überschritten wird, wird der Lüfter aktiviert.Das Netzteil besitzt keine Gummibänder oder sonstige Dämpfer wie es z.B. beim "be quiet! DARK POWER PRO 11" der Fall ist. Diese sollen Vibrationen vom Gehäuse fernzuhalten und somit die Geräusche dämpfen.Mir fallen insgesamt keine störenden Geräusche auf, weder durch Lüfter, Vibration oder Spulenfiepen.Einziges Problem das ich hatte, war die länge der Kabel für die Festplatten. Das Kabel mit zwei SATA-Power Anschlüssen (300mm + 120 mm) war etwas zu kurz für mein Gehäuse und ich musste das Kabel mit vier Anschlüssen (400mm+ 120mm + 120mm + 120 mm) benutzen. Das fand ich zwar ein wenig schade, aber da die Gehäuse Lüftersteuerung ebenfalls einen solchen Anschluss benötigt auch nicht weiter tragisch.Allem in allem kann das Netzteil uneingeschränkt empfehlen.

Venivo da un Cooler Master GX 750W...UN TRATTORE, si sentiva in tutta casa.Dopo una rapida ricerca online(in un noto forum troverete tutti gli alimentatori divisi per fascia di qualità dei materiali), mi sono deciso a installare questo alla ricerca del massimo compromesso qualità/silenziosità (devo dire che non era la mia prima scelta, ma era l'unico disponibile in poco tempo e costava un pochetto di meno dei Gold750 sempre di fascia alta)...che dire? Ha superato ogni mia aspettativa!Pregi:-qualità-silenziosità ASSOLUTA, la ventola non mi si sta attivando mai (per chi non lo sapesse ha 3 modalità:passiva,silenziosa,raffreddamento, che si attivano in base al carico e alla temperatura dell'alimentatore)-efficenza energetica, e mi va con un pc molto avido in corrente con possibilità di overclock-consimi ridotti rispetto al predecessoreDifetti:-l'unico difetto grosso è l'attacco dei cavi, soprattutto l'alimentatore per la motherboard, non so se sono tutti così i modulari, ma secondo me poteva essere pensato e fatto in maniera migliore. Incastro non perfetto se non con tanta forza e disposizione non ottimale.Per farvi capire ho una AsusGTX570, i7 2600k e una P8P67LE, ancora non mi sono dato allo smanettamento, perchè ora mi serve il massimo silenzio, comunque appena ho tempo mi ci metto e questo Seasonic qualcosa me la permette :)Consigliato al 100%, se volete fare OC forse vi consiglio di risparmiare un pochino e prendervi il 750, ma a me non interessava.

Ho dovuto sostituire il mio precedente alimentatore danneggiato probabilmente da un calo di tensione.Ho scelto questo soprattutto per la qualità del prodotto.Che dire, sicuramente si può spendere di meno ma la qualità di questo alimentatore è eccellente.Nella modalità ibrida la silenziosità è totale, fantastico.