Get modern power supplies for your modern systems! OCPT GREEN power supplies are designed based on the latest technology of switching power supplies and are equipped with the highest quality components in the industrial class. Complete protective protections, voltage regulation below 2%, 80PLUS Platinum certification, gold-plated HCS connectors, and 130 months of GREEN warranty are just some of the features of this series of power supplies.

  •     Very beautiful and eye-catching design
  •     Suitable for gaming applications and use 24/7
  •     Ability to provide maximum output power even at a maximum ambient temperature of 50°C
  •     Modern Half-Bridge topology with Resonant Tank Converter (LLC Resonant) in the initial section
  •     Topology of DC-DC converters with synchronous rectification in the secondary section
  •     Faster and more accurate performance of safety protections
  •     Voltage Regulation less than 2% for output branches 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 voltage of output rails up to one-third of global standards
  •     Ultra-quiet fan equipped with FDB (Fluid Dynamic Bearing)
  •     High efficiency and 80Plus Platinum certification
  •     Voltage input Full Range (115V @ 60Hz / 230V @ 50Hz)
  •     Equipped with HCS (High Current System) connectors with gold plating and the ability to pass 50% more current
  •     Digital controller fan with much more accurate performance than the previous generation
  •     Fully modular cabling with fully flat output cables
  •     10 years and 10 months warranty



In general, OCPT series power supplies in terms of electronic circuit design in most parts, they have no resemblance to the first-generation models. The most important features of OCPT series power supplies are:

پاور حرفه‎ای گرین سری OCPT با 130 ماه گارانتی


Modern Half-Bridge topology with Resonant Tank Converter (LLC Resonant) in the initial section

Thanks to the modern and highly efficient Half-Bridge topology along with the LLC Resonant converter, which softens the switching waveform (Soft Switching) and the practical realization of Zero Voltage Switching at the input, EMI, RF carriers, and switching losses at the input are reduced and efficiency Energy efficiency increases significantly. Also, resonant tank converters (LLC Resonant) allow the switching speed of the inlet MOSFETs to be much higher than the previous generation topologies, which in practice, especially in the event of idleness, will increase energy efficiency.

On average, the energy efficiency of the primary sector in switching power supplies equipped with this topology will be between 93% to 96%.

پاور حرفه‎ای گرین سری OCPT با 130 ماه گارانتی


Faster and more accurate performance of safety protections

The Supervisor chip is the most important part of all switching power supplies in modern switching power supplies. In the OCPT series power supplies, the Supervisor chip is much more modern and accurate than the previous-generation models, and the customizations made in its biasing, in practice, provide a much narrower and more precise range for controlling OCP, OPP, and OTP protections.

پاور حرفه‎ای گرین سری OCPT با 130 ماه گارانتی

Equipped with three separate thermal sensors for very precise control of fan rotation speed, silent status, and OTP protection

OCPT series power supplies use 3 separate and completely independent NTC heat sensors for fan speed control, silent mode management, and Over Temperature Protection protection function. The use of separate sensors results in a more accurate operation of each of the above cases and reduces the risk of problems caused by the depreciation of the sensors over time. All this information is analyzed by the digital fan speed control circuit, and as a result, it will bring you the best state of the temperature and sound output produced by the fan.


پاور حرفه‎ای گرین سری OCPT با 130 ماه گارانتی

Voltage Regulation less than 2% for 3.3V, 5V and 12V output rails

The use of DC-DC converter topology to generate 5V and 3.3V rails in the second section has stabilized 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, Guarantees their correct and accurate operation in the state of no-load (Zero Load) and Cross Load (unbalanced distribution of load on output rails).


Use of High Current System (HCS) connectors with gold plating and the ability to pass 50% more current

In new generation platforms, due to the introduction of processors with more cores as well as higher power consumption (TDP), motherboard manufacturers, especially in high-end and expensive models, use power connectors in the server motherboard class called HCS (High Current System. These connectors). On average, the new OCPT series power supplies use gold-plated HCS models in the high-power output modular connectors section and in both the male and female sections (graphics power supply, processor, and motherboard connectors). In this type of connector, increasing the operational contact surface and using a much more resistant alloy against high currents in practice reduces ripple, voltage drop, and connection point temperature, and overall increases the stability of the system in overclocking and gaming applications. All-flat cables of this power supply in PCI-E and E-ATX power supply have a thickness of 16AWG (except PCI-E power cable GP650B-OCPT).

پاور حرفه‎ای گرین سری OCPT با 130 ماه گارانتی

Ripple and voltage of output rails noise up to one-third of global standards

Ripple and output noise is one of the most important factors in reducing the useful life of power and equipment connected to it. The voltage ripple of the output rails of the OCPT series power supplies is up to 3 times lower than the strictest and latest standard of ATX power supplies due to the modern topology of implementation in the primary and secondary sections along with the two-stage filter in the secondary section.

پاور حرفه‎ای گرین سری OCPT با 130 ماه گارانتی

Ultra-low noise fan equipped with FDB (Fluid Dynamic Bearing) type

The second-generation OCPT power supplies are equipped with high-quality fans in the industrial application class 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. Also, due to the very cool performance of this series of power supplies, extremely quiet fans with a maximum rotation speed of 1200RPM have been used to cool them.


پاور حرفه‎ای گرین سری OCPT با 130 ماه گارانتی

Increased average energy efficiency compared to the previous generation OC+ series

Having the most modern topologies in the primary and secondary sections along with extremely high-quality components in the manufacture of OCPT power supplies has caused a significant improvement in the energy efficiency of the second generation of these power supplies at normal operating voltage conditions in Iran (230 volts). Increasing energy efficiency in practice minimizes power consumption losses, and this has led to reduced heat loss, reduced heat of sensitive parts, quieter performance, and ultimately significantly increase the life of these models


پاور حرفه‎ای گرین سری OCPT با 130 ماه گارانتی


پاور حرفه‎ای گرین سری OCPT با 130 ماه گارانتی

Digital controller fan with much more accurate performance than the previous generation

The new generation of OCPT power supplies is equipped with digital controller documentation sensitive to both the amount of input inside the power supply and the load on the power output. This fully intelligent circuit controls and manages the Fanless status (at an output load of less than 30% of rated power) and the fan rotation speed by analyzing the mentioned lines with the help of its 3 sensors receiving its thermal information, in different conditions. Also, due to the much cooler performance of the OCPT series power supplies compared to the previous generation, these models have extremely low noise performance, even up to about 90% of the rated power.

پاور حرفه‎ای گرین سری OCPT با 130 ماه گارانتی

 10 years and 10 months warranty GREEN

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 OCPT series power supplies. This OCPT 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.

GP750B-OCPT power output cable configuration


General specifications
Series OCPT
Model GP750B-OCPT
Continuous Power 750W
Form Factor ATX PS2
Dimensions 86mm x 150mm x 180mm
Weight 2535 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 10A
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
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 30% 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 4 Qty
SATA 12 Qty
4Pin Molex 4 Qty
FDD Connector 1 Qty
Current and power of output rails
12V Max Load+ 750W
Max 3.3V+ & +5V Combined Power 130W
Maximum +12V Output Current 62.5A
Maximum +5V Output Current 25A
Maximum +3.3V Output Current 25A
Maximum +5V/SB Output Current 4A
Maximum -12V Output Current 0.3A
Warranty / After-sales service
Warranty Period 130 Mounths

GP750B-OCPT Gallery

User Manual
Manual Containing Installation Guide And Technical Specifications
Size : 14.9MB
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.