Company Profile:
Since the incorporation of Sea Sonic Electronics Co., Ltd. in 1975, we have maintained our focus on research and development and the production of quality power conversion products.
For the past decades, supported by cutting edge technology based upon a strong research and development team, Sea Sonic Electronics has provided timely and professional solutions to meet many of the IT industry's requirements.
In the year 2000, Sea Sonic Electronics successfully entered the telecommunication and networking power conversion market. At the same time, we expanded our manufacturing facility to provide JIT global logistics service in order to meet our increased business demand.
For the future, we will continue our philosophy of dedication, innovation, professionalism and 4G's (Great Technology, Great Quality, Great Service & Great Price) in order to maintain our goal of continued long-term business partnerships and create "win-win" situations for our customers.

Company Vision:
We believe optimal power solutions will better the quality of life.

Company Mission:
Sea Sonic Electronics Co., Ltd. is dedicated to:
Products: Design the edge cutting products to lead the market.
Marketing: Provide finest level of customized services
Services: Maximum flexibility to meet our customers' needs
Finance: company with a strong balance sheet.

Company Culture:
Sea Sonic Electronics Co., Ltd. operates under the belief of practicality and honesty.


Overview of Seasonic X-750 (SS-750KM Active PFC)
Sea Sonic Electronics Co., Ltd. today announces the release of the company’s flagship "X" series power supplies, the world’s first ever 80PLUS® Gold certified, full modular, multi-output ATX standard power supplies for general sales.

The "X" series, available in 650 & 750 watts output power, showcases the advancement in power supply design technology and embedded inside each unit are two (2) patented features to make the "X" series the most advanced PC power supply on the market today.

Seasonic Patented DC Connector Module with integrated VRM (Voltage Regulation Module) . This patented feature takes the concept of modularity one step further and provides not only complete modular system integration flexibility but at the same time, reduces the current transfer between the PSU main PCB which means enhanced power utilization efficiency, output stability, safety and security.

Hybrid Silent Fan Control2. This patented features upgrades the current Seasonic market leading S2FC (Smart & Silent Fan Control) design with three (3) separate operating modes, fanless, silent and cooling. This unique fan control circuit in combination with the world leading Sanyo Denki San Ace PWM (Pulse Width Modulation) shaped blade, ball bearing fan, makes the "X" series the leader in power supply silence and cooling technology.

In addition, the "X" series power supplies utilizes the highest quality level of material usage such as solid polymer capacitors, high grade and high temperature electrolytic capacitors, dual sided PCB and even scratch resistant power supply case coating, all to make the Seasonic "X" series, the highest standard power supply available in the market today.

The "X" Series is the crowning achievement of Sea Sonic Electronics’ 34 years of dedication to power supply research, design and production and the continued pursuit of ideas and purpose to better the environment and achieve our slogan, Green Innovation Powers Your Life.

Features of Seasonic X-750:
- 80PLUS® Gold Certified Super High Efficiency
- Patented DC Connector Module with
- Integrated VRM [Voltage Regulator Module]
- DC to DC Converter Design
- Patented Hybrid Silent Fan Control
- Sanyo Denki San Ace PWM Silent Fan
- Conductive Polymer Aluminum Solid Capacitors
- Highly Reliable 105℃ Japanese Brand Capacitors
- Tight Voltage Regulation [±3%]
- Active Power Factor Correction [99% PF Typical]
- Ample +12V Output
- Dual Sided PCB Layout
- Ultra Ventilation [Honeycomb Structure]
- Full Modular Cabling Design
- Multi-GPU Technologies Supported
- All-in-One DC Cabling Design
- Patented Easy Swap Connector
- Universal AC Input [Full Range]
- 5 Years Warranty


Power Distribution:


Wire Configuration:




This post has been edited by AceCombat: Feb 11 2010, 09:53 PM

Today I'm going to review a hardcore Power Supply Unit from Seasonic, the model is X-750 Gold. Let's move on!!!


Well, this is the box of the power supply, the box is so bulky and heavy, this is because it's thick box.


A simple description about the X-series PSU from Seasonic.


It's a 750W from the X-Series, it's rated as 80Plus Gold™


Turn to the back of the box and we can see a lot of description about the PSU. An image of inner part of the PSU is clearly shown there. And few images about the actual PSU.


The bottom left corner at the back of the box explains Seasonic X-Series patended design compared to the ordinary modular design PSU.


A big wow from me, all the accessories and the PSU are very well fitted inside, I closed back the box and try to shake the box, and I heard no sound at all, that's mean the package is very well secured inside, 10/10 for the packaging from me.


By taking out all the hardwares inside, It contains Power Supply Unit, modular cables bag, user manual, screw, fat power cord, and a Seasonic sticker.


Another wow from me, this is the bag for the modular cables, it's separated into left and right. The bag is well built and beautiful, I can see that Seasonic is emphasizing the X-Series and the Gold rated "GO FOR GOLD! ™" And the bag is gold and black in color, matching the power supply color theme.


By opening the cables bag, I took out two plastic bag that contains all the modular cables, the left bag contains all the major cables
Major cables are:
- 1 x 24 pins Power connector
- 2 x 6 pins PCIE Power connectors ( 1 PCIE has 2 6 pins connector )
- 2 x 8 pins ATX Power connectors
- 1 x 4 pins P4 ATX Power connector

While the right bag contains all the peripheral cables, so that the packaing is not messy and troublesome for end users.
Peripheral cables are:
- 8 x SATA connectors
- 8 x Molex connectors
- 2 x Floppy connecotrs ( They are separated and only can be used when connected to one of the molex )

This post has been edited by AceCombat: Feb 5 2010, 06:59 PM

Appearance and Physical Specifications:


Triple protection???
Well, you're right, first, the outter thick box, then an ultra thick foam to secure the PSU inside, then another layer of the sleeve bag for the PSU.
The sleeve bag has a gold printed "Seasonic" wording outside.


The beast is here!!! Firstly, I really hope to see that this is an extended length PSU but I know it's not, but the overall finishing of the PSU is superb, the outer layer of the PSU housing is black powder coated and the fan intake is honeycomb designed to minimize air resistance as claimed.


On top of the fan hub, a gold colored background and silver colored "Seasonic" wording and logo are located, I bet most of the manufacturer did the same thing. So, nothing special here.


This is interesting, the PSU will only activate the fan when the component is hitting certain working temperature, in order not to confuse the end user, the "Temperature Activated Fan,Rotates only when required" label is sitted below the fan.


This is the front view of the PSU, it's a full modular PSU, ( full means even the 24 pins and the 8 pins are modular-ed ), total of 11 female modular connector are located here.


The top of the female connector are for the major cables, they are, half of the 24 pins power connector, 4 pins and 8 pins ATX connector, and PCIE connector. While the bottom part is for peripheral cables, they are IDE / SATA / Floppy , and another half of the 24 pins power connector.


Another eye-catching design, the PSU is trimmed out with some gold accents and the "Go for Gold!" logo on the left hand side.


A shot with flash turned on. Honeycomb designed exhaust system of the PSU, it uses the same idea as the fan intake, to minimize the air exhaust resistance.


The rear of the unit has the gold trim Seasonic logo, and the on/off switch but no voltage selector switch as this unit is full range.


Made in China ( all manufacturing in China to reduce labour and material cost ) The right hand side label has the PSU specification and the S/N of the PSU.


A-PFC also means improved efficiency, reduced heat and less power usage. The side of the power supply gives you all the electrical information you need for the X-750, including the output of its 12V rails and overall power output.


This post has been edited by AceCombat: Feb 5 2010, 07:04 PM

Internal Build Quality


By removing the 4 screws on top and 2 screws at the side, I managed to open up the top housing of the PSU.
And the intake fan is shown here.


The fan is temperature controlled and only rotate when hitting certain working temperature,
The fan model is San Ace 120 9S1212P4M61, made in Philippine.

Fan Specification:
Material: plastics
Life expectancy: 40,000hours ( indoor environment survival rate 90% at 60º C,rated voltage,and continuously run in a free air state)
Motor Protection System: Current blocking function (with reverse polarity protection)
Dielectric Strength: 50/60 Hz, 500VAC, 1 minute (between lead conductor and frame)
Insulation Resistance: 10MΩ or more at 500VDC megger (between lead conductor and frame)
Sound Pressure Level (SPL): Measured at 1m from the air inlet
Storage Temperature: -30ºC to +70ºC
Operating Temprature: -10ºC to +70ºC(Non-condensing)
Lead Wire: (+)red, (-)black
Sensor: yellow
Model No:9S1212P4M61
Rated Voltage(V):12
Operating voltage range(V):6.0 to 13.8
Rated current(A):0.13
Rated input (W):1.56
Rated rotaing speed(min-1):1850
Air flow (CFM):58.6
Static pressure(Pa):22.7
Noise (dB[A]):24
Mass (g):140


Let's take a brief look about the inner part of the PSU. ( left side )


Right rotate


another right rotate


another right rotate


I've removed the whole PSU from its housing, the inner finishing of the housing is not fully powder coated, an insulator is placed on top of the housing.


A super thick thermalpad is used to transfer the heat to the housing to provide cooling solution to the MOSFET ( act as voltage regulator )


The PCB of modularis split into two parts.
The upper part is required for the minor rails voltages, 5v and 3.3v, which is for the Molex/ SATA/ Floppy connector fed by a few 12v leads and grounds while the bottom part of the modular PCB supply 12v to the needed components, and ground leads and it is fed by straight metal connections from the main PCB.


Bridge rectifier cooled by a tiny heat sink followed by the APFC coil to the left of that.


A pair of Nippon Chemi-con cappy rated 400v 390uF 105c as primary cappy.



This post has been edited by AceCombat: Feb 5 2010, 07:20 PM

Continue............


An ordinary heatsink is attached to the majority of the power components.


Polymer aluminum solid cappy from Nippon Chemi-con is provided and two heatsink is attached onto the PCB.
It overcomes leaking and exploding electrolytic capacitor issue. It's glad to see solid cappy is replaced into PSU world.


Made in Japan 105C rated electrolytic caps for the power filter (larger, brown wrapping).


DC to DC converter
If my brother is not mistaken, he told me that, this circuit breaks to different voltage levels that needed by the cables that connected to the PSU. ( some of them are 12v while some of them are 5v ). The black components are MOSFETs, also the PSU voltage regulator.


RF shielded main 120V power socket.

More pictures:



Almost perfect computerize robot-arm soldering

Other components:




Cables Length and Finishing

24 pins Power Connector

60CM long


8 pins ATX connector and 4 pins P4 ATX connector

60CM long


2 units of PCIE cables, one unit has two 6 + 8 pins PCIE power connector.

60CM long


3 + 3 + 2 SATA cables

90CM long


3 + 3 + 2 Molex Cables

90CM long


2 units Floppy power connector
15CM long

This post has been edited by AceCombat: Feb 5 2010, 07:43 PM

The PSU is locked and loaded


Very nice looking, neat and tidy.


There's an extra cable lying around

Well, I don't have some hardcore equipment to fully test the PSU but I do have two semi-hardcores rig to test the PSU.

Rig 1:
Intel Core i7 920 @ 4.6GHz w/ TRUE Black
Asus Rampage II Extreme
Kingston Hyper X 3x2GB
Asus GTX285 1GB SLi
Asus Xonar D2X
4 units 1TB SATA HDD
2 units 500GB SATA HDD
2 Pioneer DVD-Writer SATA
Cooler Master Cosmos S Casing

Rig 2:
Intel Core 2 Quad QX9650 Extreme Edition @ 4GHz
Corsair H50 Hydro Custom Mod
DFI LanParty X48 UT T2R w/ Thermalright Flame Freezer
Patriot Viper Extreme 2x2GB 1066MHz
XFX GeForce GTX275 896MHz
Creative X-Fi Titan Professional Audio Edition
3 units WD 640GB AAKS RAID 0
1 LG DVD-Writer SATA
Cooler Master HAF932

Softwares:
OCCT
ITE Smart Guardian
3DMark06
Furmark
Prime 95





So far, this PSU is amazing, when the PSU idle, the fan is not moving at all, that's mean it produces 0dB and only activate the fan when it comes to heavy load. The rail reading is taken directly by using a multimeter, and it's stable even with GTX285 SLi, definitely one ass-kicking product from Seasonic and a must for a hardcore gaming rig

Pros:
1. Superb finishing and built quality
2. Good packaging, almost zero cosmetic damage during shipment.
3. High end Japanese cappy
4. Temperature controlled fan
5. High efficiency
6. Full modular and sleeved cables

Cons:
1. A bit pricey
2. Hope to see it's an extended size PSU

Overall, I rated this PSU 9.5 / 10 and definitely a need for hardcore overclockers and hardcore gaming rig

Where to find this PSU?
1. LOWYAT PLAZA!
2. Lowyat Forum!
I iz reli enjoice

This post has been edited by AceCombat: Feb 8 2010, 11:39 AM

please keep this review clean.
refrain from pointless posts

Thanks bro DaRkSyThE for your help

bro is this the oem of the xfx psu??

If i'm not mistaken, the XFX 850W Silver is purely from Seasonic M12D 850W.
High chance that Seasonic OEM for XFX

The difference are extra cosmetic and from dual rail to single heavy duty rail.

It is called the VRM ( Voltage Regulator Modules ). It takes input from +12V, step it down to 3.3V and 5V. Principle of operation is similar to CPU VRM.
5V and 3.3V are locally regulated by the VRM controller. Can achieve very tight regulation and high efficiency with this methods ...

taging this tread. i am getting this psu soon.

Thanks for clarify it, it's VRM
And do you mind explain why it can achieve high efficiency with this method?

got this psu last month or last few weeks

my opinion, its extremely quiet, compare to the corsair tx750w which in my opinion is very noisy...

and also it release less heat, can feel by putting hand at output of PSU at almost the same load compare to TX750w.

if i run stock settings on my setup, the fan hardly need to spin

= 0 dB noise...

This post has been edited by lichyetan: Feb 5 2010, 11:05 PM

H0w much this would cost?

The box looks very stylish.

Whether it's single or dual rail?

Yes bro you're right, the psu most the times, the fan is not spinning, but i runnning stress test of course got la.
But Seasonic confirmed that the psu wont go beyond 50c working temperature

Pls pm bro storm88 for more information

It's single rail Kevin koko

the psu looks damn cool
wht is the price

If you want to sleeve your PSU and would not like to void it's warranty then this is the PSU to get Fully modular just like the Silverstone Decathlon series and high efficiency too (hits 90%+), comparable to the Corsair HX750/850 series.

RM600 IdealTech

The conventional secondary output for 5V and 3.3V is as shown in the above figure. +5V and +3.3V share the same secondary winding but, with different control methods.

+5V and +12V are group regulated and the cross regulation greatly depends on the design of coupled transformer L1.

The +3.3V, on the other hand, uses magnetic duty ratio controller for independent regulation. Whenever system draws big current from +5V and +3.3V, there will be loss across D1, D2, D3, D4, L1, L3, and small amount on L2, L4. The forward voltage drop of schottky diode D1 ~ D4 is proportional to forward current. Therefore the loss is high as current increases.

By using VRM, we can eliminate diode D1 ~ D4 and L1, L3. VRM draws power from +12V lines and step down to +5V and +3.3V using high side MOSFET and low side MOSFET. The MOSFET on impedance is very low ( in miliohm range ). Hence, the efficiency is higher and tighter regulation is possible because it is locally regulated by VRM controller. VRM output requires low ESR capacitors as it affects the output ripple voltage. The entire VRM circuits is on the modular connector PCB. 2 toroidal coils are the output inductor. All capacitors are chemicon PSA series.

This post has been edited by kisuke_77: Feb 6 2010, 08:53 PM

how much is the cost? where can to get it?

high temperature electrolytic capacitors, dual sided PCB and even scratch resistant power supply case coating make this one of the more advanced power supplies to come out in a long while. definitely not a cheap buy but worth the bang for the buck.

It costs about S$265 in Singapore ... That would be around RM650 !

u quite good on understanding about psu..
why don't build one, should cheaper i guess..

Understanding how it works is easy... But, designing a PSU requires experience and skill. I am not up to that level

if not mistaken,
corsair's psu are made by seasonic right

not all.. but those single 12v rails yes..

this is the few 80plus gold... nice review...

So X750 is competitor to Corsair HX750 but I still prefer HX750 over X750.

1) noise level & performance HX750 = X750
2) HX750 has longer, thinner, and more cables. X750 is badly sleeved aiyoyo
3) HX750 has 7 years warranty, RM630 vs X750's 5 years RM600
4) X750 looked fat & short

Both are good PSUs, base on Synchronous Rectification Forward Converter ...

But,
(1). Seasonic uses Sanyo Denki PWM Fan ... HX750 - Yate Loon
(2). Seasonic uses all Japanese Capacitors ... HX750 - some are non-Japanese capacitors

VRM ouput capacitors in HX750:


It it up to individuals ...

This post has been edited by kisuke_77: Feb 7 2010, 09:39 AM

yup, its 100% modular, like decathlon series

plus the connector is a female type

which is hella easy to find spare cables of ur own

& sleeve em with murdermod sleeve

HX850
http://www.jonnyguru.com/modules.php?name=...=Story&reid=153

X650
http://www.jonnyguru.com/modules.php?name=...=Story&reid=169

dont think latest corsairs are oem by seasonic anymore, the hx620 and 520 yes they are made by seasonic.

Since TX series onwards up till the HX650W,750,850 all by Channel Well.

and checkout how well the X650 Unit can deliver the voltage, guess X750 will provide the same performance as well...

What I think about corsairs are TX and HX series all sleeved more nicely compare to X750.

Personally i like the Corsair sleeving, but i like the X750 temperature activated fan

ace so this one worth to get or not? i am using pcp610 la. thinking to upgrade to this unit.

yeah, kinda agree with you, its dead silent (0 dB, no PSU will quieter than it) when system are idling.

i even can game without have the fan to spin, but stress test time it will spin. (on stock settings)

Errr....I used to have a FSP Zen 400w passive PSU inside got no fan one, that one is total silent

Anyway, this is one good quality psu, inside almost no wires

aiyoyo i still confused to get x750 or hx750 la.

one comment for the box....

it doesn't have handles (pemegang)....

Trust me, even got handle, u also scare the weight will damage the box by pegang it

Seasonic X750 FTW !!!

i am leaning to x750. still gold rated in working condition at 40-50C" for x650 so hopefully its the same as x750. the hx750 is silver rated at working 40-50C" even its gold rated in 23C" at 80org

lol bro,
other than the poor sleeving, i think the rest of the x750 superior to the HX series. The internal design, fan used, components used etc...

the sleeving part maybe can redo la, will this void the warranty if i resleeved the x750?

Definitely you will

Bump up for reference

Another new Sesonic thread http://forum.lowyat.net/topic/1369375 , new psu review ??

Wow It's pretty.

wow, this is an extremely high efficiency psu..

Yup, extremely high efficiency and nice finishing psu