In Ultra-modern OCDG GREEN series power supplies, thanks to very fast and accurate control and management of all parameters by microprocessors and special microcontrollers, We witness extremely high energy efficiency, exemplary output ripple control, very precise voltage regulation (less than 1%), and Transient Response will be very fast. The performance of this series is literally fantastic and exemplary!

  •     Very beautiful and eye-catching design
  •     Suitable for gaming applications and 24/7 use case
  •     Cable-less Design circuit design to reduce production errors and increase the purity of output voltages
  •     Ability to provide maximum output power even at a maximum ambient temperature of 50C
  •     Digital control of parameters by a dedicated microcontroller
  •     Modern Half-Bridge topology with Resonant Tank Converter (LLC Resonant) in the initial section
  •     High-efficiency MOSFETs with low-RDS in DC-DC converters
  •     Equipped with a transformer by Flat Wire Winding technology
  •     Voltage Regulation less than 1% for output rails 3.3V, 5V and 12V
  •     Utilization of all-Japanese solid capacitors and all-electrolyte type 105°C in the primary and secondary section
  •     Ripple and Noise Voltage of output rails Maximum one-quarter of global standards
  •     Ultra-quiet fan equipped with FDB (Fluid Dynamic Bearing)
  •     High energy efficiency and 80Plus Platinum certification
  •     Voltage input Full Range (115V @ 60Hz / 230V @ 50Hz)
  •     Equipped with High Current System (HCS) connectors with gold plating and the ability to pass 150% more current
  •     Fully modular cabling with fully flat output cables
  •     10 years + 10 months Green warranty




Thanks to very fast and accurate control and management of all parameters by microprocessors and special microcontrollers in this type of power supply, it seems extremely high energy consumption efficiency, exemplary output ripple control, very precise voltage regulation (less than 1%), and transient responses are very fast.


Transformer with Flat Wire Winding technology

OCDG series power supplies are equipped with high-efficiency transformers with flat wires. These types of transformers have much less magnetic leakage and occupy much less volume than conventional models at high frequencies. Also, in transformers equipped with flat wires, due to the increase of the skin effect at high frequencies and the tendency of electrons to pass through the outer layers of the wire, the AC resistance will be much lower than the models equipped with round wires. This will reduce heat loss and also increase the energy efficiency of the transformer.


High-efficiency MOSFETs with low-RDS in DC-DC converters

OCDG power supplies owe much of their ultra-high energy efficiency to their high-speed switching MOSFETs, low-RDS, and ultra-low leakage currents in their secondary DC-DC converters. This ultimately results in extremely cool performance and a very long lifespan of this series of green power supplies.


Super high quality Japanese capacitors in the initial part

The 1200 watt and 1350 watt models in the OCDG GREEN series power supplies are equipped with two 820uF (1640uF) capacitors with extremely high quality and, of course, the expensive MXK series made by the Japanese company Rubycon. Among the features of this type of capacitor is the long life of 3000 hours at 105 ° C and very low ESR. Also, this high volume of capacitive capacity in the initial part of the ripple will have a very low output and also a guaranteed Hold-Up Time beyond the standards. Meanwhile, for the power of 1050 watts of the same series and in proportion to its output power, two high-quality 680uF (1360uF) capacitors of the MXH series made by the Japanese company Rubycon have been used.


High quality Japanese high quality electrolytic and solid capacitors in the secondary section

In the secondary part of OCDG series power supplies, electrolytic capacitors (Nippon Chemi-Con) made in Japan and solid capacitors (Nippon Chemi-Con and NICHICON) made in Japan with the ability to operate at 105°C and very long life are used. These capacitors, which are in fact part of the filter circuit and the ultimate refining of output voltages, while stabilizing the long life of the power supply in the most difficult conditions, will improve the power performance in the ripple section and output noise.


Cable-less Design circuit design

In none of the power transmission sections on the OCDG GREEN series power supply board, no wire is used and the current transfer from the input of the main board to the output of the board related to the cable connections is considered only by the copper lines of the printed circuit board. So that even the board of the Cable Management section of OCDG power supplies is connected directly to the mainboard and its soldering operation is performed. This not only minimizes mass production errors, but in practice reduces energy losses, does not disturb the air circulation inside the power supply, and also increases the purity and quality of the output voltages.


Digital control of banks by a dedicated microcontroller

Online management and control of all OCDG series power supply parameters are performed by a dedicated microcontroller. This digital control ultimately improves the transient response of output voltages, increases energy efficiency, reduces ripples and noise, and stabilizes output voltage levels as much as possible.



Modern Half-Bridge topology with LLC Resonant converter in the initial section

In this series, thanks to the modern and highly efficient Half-Bridge topology along with the LLC Resonant converter, which softens the switching wave shape (Soft Switching) and the practical implementation of Zero Voltage Switching at the input, EMI, RF carriers, and switching losses at the input are reduced. Findings and energy efficiency (Efficiency) increase significantly. Also, the Resonant Tank Converter (LLC Resonant) allows the switching speed of the input MOSFETs to be much higher than the previous generation topologies, which in practice, especially in the case of idleness, increases energy consumption (efficiency).



Voltage regulation less than 1% for main output Rails 3.3V,5V and 12V

The use of DC-DC topological converters to generate 5V and 3.3V voltage in the secondary section stabilizes the output rails as much as possible in this series of power supplies. Also, the independence of the main parts of voltage control and management of each output rail in the power supplies equipped with this topology in the secondary section, their correct and accurate operation in the state of no-load (Zero Load) and Guarantees Cross Load (unbalanced distribution of load on output rails).



Faster and more accurate performance of safety protections

The monitoring chip in modern switching power supplies is the most important part of monitoring all the interactions performed in it. OCDG series power supplies use a newer and more accurate Supervisor chip than previous generation models and provide extremely precise digital control, in a much more closed and accurate range for controlling OCP, OPP, and OTP protections.



Fully modular cabling management system with HCS + connectors with gold plating and 150% more current throughput

All-flat cables and the ability to manage all-modular cabling This series of power supplies will play a decisive role in the faster, more elegant and professional assembly of your system. While in new generation platforms due to the introduction of processors with more cores as well as more power consumption (TDP), motherboard manufacturers, especially in high-end and expensive models, use power connectors in the motherboard class called HCS + (High Current System) server. . These connectors have an average of up to 150% more power to pass current. The new OCDG series power supplies use gold-plated HCS + samples in both the male and female sections in the modular connectors section. In this type of connectors, they increase the operational level and use a much more resistant alloy against high currents in reducing ripple, voltage drop and connection point, and in general, they will increase the stability of the system in overclocking and gaming applications.



Completely modern and efficient cooling system with the ability to select fanless mode

The second-generation OCDG power supplies are equipped with high-quality fans and in industrial application classes with FDB technology. FDB fans, which are currently one of the most modern bearing systems, have an even longer life and, of course, much less acoustic noise than Double Ball Bearing fans. OCDG power supplies also have a digital point controller sensitive to both points inside the power supply and the amount at the power output. This fully intelligent circuit controls and manages the fanless status (at an output load of less than 25% of rated power) and the fan rotation speed in different conditions by analyzing the lines mentioned by the digital microcontroller. In addition, a special switch built into the back of the power can be activated or deactivated by Fanless mode.



10 years and 10 months warranty Green, your support.

GREEN Co. offers these models with a 130-month (10-year and 10-month) warranty, thanks to the appreciation and respect of its customers for their products and the exceptional performance and exemplary manufacturing quality of OCDG series power supplies. This OCDG GREEN series power supply warranty period is one of the highest power supply warranty periods in the world and the PSU warranty period in Iran.



Energy efficiency and rotation speed diagram of GP1200B-OCDG power fan

GP1200B-OCDG power output cable configuration

General specifications
Series OCDG
Model GP1200B-OCDG
Continuous Power 1200W
Form Factor ATX PS2
Dimensions 86mm x 150mm x 180mm
Weight 3600 Gram
Case Color Black - Silver
Material SECC
Cable Management Type Fully Modular
Cables Type Full Flat Cable
Regulatory FCC, CE, CB, UL, cUL, cTUVus, TUV, CCC, Wee
Technical Specifications
SSI EPS 12V Standard v2.92
ATX 12V Standard Version v2.4
AC Input 100-240Vac RMS
Input Current 15A
Working Humidity Range 90% - 20%
Continuous Output Rated Temperature 0C - 50C
Frequency 47Hz - 63Hz
230V Effceincy Range 94% - 92%
Average 230 V Efficiency 93%
Standby Power Consumption (ErP Ready (< 0.5W at Standby Mode
PFC Type Active PFC
Power Factor From 0.95
Hold-Up-Time 16ms @ 100% Load
Primary Side Topology (Half-Bridge & LLC Resonant Converter (Digitally Controlled
Secondary Side Topology Synchronous Rectification & DC-DC converters
Primary Capacitor Type All-Japanese 105°C Electrolyte
Secondary Capacitors Type All-Japanese 105°C Electrolyte And Solid
Protections OCP, OVP, UVP, OPP, SCP, OTP, SIP, NLO
PowerGood Signal 100ms - 500ms
MTBF 120.000hrs @ 25°C, 230Vac, 50Hz
Fan Type & Size (135mm Golf Fan - FDB Technology (Fluid Dynamic Bearing
Fanless Function Yes (Up to 25% output load)
Heat-Guard Yes (Up to 1 minute after system shutdown)
Number of output power connectors
MB 20+4 Pin 1 Qty
CPU 12V 4+4 Pin 2 Qty
PCI-e 6+2 Pin 10 Qty
SATA 12 Qty
4Pin Molex 8 Qty
FDD Connector 1 Qty
Current and power of output rails
12V Max Load+ 1200W
Max 3.3V+ & +5V Combined Power 130W
Maximum +12V Output Current 100A
Maximum +5V Output Current 25A
Maximum +3.3V Output Current 25A
Maximum +5V/SB Output Current 3A
Maximum -12V Output Current 0.3A
Warranty / After-sales service
Warranty Period 130 Mounths

GP1200B-OCDG Gallery

User Manual
Manual Containing Installation Guide And Technical Specifications
Size : 11.3MB
Green PSU Comparison Table
Full Technical Specifications comparison For GREEN Power Supplies
Size : 2.23MB
GREEN PSU Calculator Guide
Buying Guide and power consumption of PC hardware
Size : 1.69MB
GREEN Product Catalog
Full GREEN Product Catalog for Q3-2020
Size : 52.1MB

Some high-end green power supplies (OC, OC +, OCPT, OCDG series) have Fanless Mode. In this type of power supply, the power fan will be turned off up to about 20% to 30% of the rated power. To test the performance in this mode, place the smaller key on the back of the power supply in the "l" position.

Some high-end GREEN power supplies (OC, OC +, OCPT, OCDG series) have a hot air ejection system inside the power supply. The operation of this system is such that up to about 1 to 2 minutes after the power is turned off, the fan continues to operate until the hot air inside the power supply is completely ejected.

Some high-end GREEN power supplies (OC, OC +, OCPT, OCDG series) have Fanless Mode. In this type of power supply, the power fan will be turned off up to about 20% to 30% of the rated power. This key controls the operation of this system. This system works as long as this key is "O" (default mode). In case the key changes to "l" mode, this system will be deactivated and the device fan will work in any situation.

• The expiration date of the power supply is indicated on the barcode label of the device serial number (installed on the power supply and product box) and the GREEN warranty criterion for after-sales service support is only at the same date.

• Any damage or tampering with the barcode, the serial number of the device, or the sealing label of the power supply guarantee will invalidate.

• Environmental conditions for using switching power supplies such as temperature range, humidity, and basic ventilation are listed on the technical specifications label and manual. Power operation outside the mentioned conditions will void the warranty.

• Any physical damage such as melting and deformation of connectors, burning and any damage to wires, deformation, and paleness of the metal box caused by improper transportation and operation will void the warranty.

• Switching power supply warranty only includes technical defects due to power generation operations, technical defects due to opening the power door by unauthorized persons, tampering with internal circuits, incompatibility of power output for power supply with consumable hardware and installation in non-standard places and conditions, etc. is not included in the warranty service.

• Any damage caused by impact, natural disasters, fire, city power fluctuations, physical damage, fluid ingress is not covered by the warranty.

• Any physical damage, breakdown, or damage caused by improper operation by unconventional software and hardware outside the technical specifications of Power such as non-computer industrial applications (such as LED boards) and crypto-currency extraction (mining) will void the warranty.

• In case of general system damage to your PC components, according to our experts, GREEN Warranty will ONLY include the provision of services to the Power supply. Other hardware components and information stored by the user will not be covered by our warranty services.

• In all modular and semi-modular power supplies, each model has its own special cables. Replacing the cables with miscellaneous samples and not approved by GREEN experts or using other series cables and different models of GREEN power supplies on another model will invalidate the warranty.

• Any change in the specifications of the device and its opening by unauthorized persons will invalidate the warranty.

• Due to the rapid growth and development of computer parts, in the absence of the original model of the device, alternative models are offered, taking into account the price difference of the time being.

• Defective power supply to sales agents or warranty service office for replacement (according to warranty conditions), repair, or complete technical testing is the responsibility of the buyer.

1. Please make sure that the power cord is properly connected and that the power button on the back of the power supply is on.

2. Please ensure the correct and complete connection of all cables as well as the correct direction of the connectors to your system.

3. Make sure there is no short circuit in the system. To do this, remove one of the system components from the circuit each time and try again.

4. If any of the above happens to you, unplug the power supply for 2 minutes and turn it off. Then reconnect the power supply.

5. If Power fails to turn on the system in compliance with any of the above, please contact GREEN after-sales service.

For this purpose, from the top menu of the website, click on the "Calculator" section. Then, select the technical specifications of your parts. Finally, this system introduces the appropriate power supply compatible with your system.

Complete testing of switching power supplies requires specialized equipment and trained personnel. Using the following trick, you can ensure the initial health of your power supply:

- First disconnect all power connectors from the system and power supply. Then connect the desired power to the power wall outlet and turn on the power switch on the back of the power. Next, connect the green wire (pin number 15) and one of the black wires (pin number 16) to the 24-pin power connector using a wire. If the power fan turns on, your power supply is apparently in "OK" status.

- For 12V+ voltage (yellow wires) maximum 5% ± Nominal value: 12.6V+ to 11.4V+

- For voltage 5V+ (red wires) maximum 5% ± Nominal value: 5.25V+ to 4.75V+

- For voltage 3.3V+ (orange wires) maximum 5% ± Nominal value: 3.47V+ to 3.14V+

- For 5VSB+ voltage (paint wire) maximum 5% ± Nominal value: 5.25V + to 4.75V+

- For voltage 12V- (blue wire) maximum 10% ± Nominal value: 10.8V- to 13.2V-

Yes. Thanks to the Active PFC circuit and the protections provided in the input section of the GREEN power supplies, there is no need to worry about connecting this type of UPS to all models of GREEN power supplies.

No. Strictly avoid connecting cables of different models to other models. The arrangement of the pins, the diameter of the wires and the metal alloy of the connectors is unique in different families of GREEN power supplies. Use only the cables inside the power box or the cables approved by the GREEN after-sales service unit.

No. Most PCIe risers on the market carry even more power than the standard for PCIe x16 (about 75W). However, according to ATX standards, SATA and molex connectors have a maximum power transfer of 54W. This means that 21W is applied more to these connectors and this will cause many problems for the user.

The processor power connector (E-ATX) in all green power supplies is of 4 + 4 pin type, which are connected to each other through a special socket. To separate this socket, just pull the socket out from both sides.

This blank pin corresponds to a voltage of -5V. This voltage has been removed in power supplies with ATX12V v2.01 and above. As a result, all modern and new power supplies do not have this pin.

In this video, the reasons and solutions to solve this problem are fully explained:

- If you live in Tehran, send your defective device with all accessories and boxes to GREEN after-sales service unit at the following address:
No.215, Between Gharani Ave & Nejatollahi St, Somayeh St

- If you live in Iran but not in Tehran, find the nearest after-sales service Agents to your place of residence on the "Agents" page and deliver the defective device to the desired representative.