Gigabyte power supply review: Gigabyte UD750GM Power Supply Review

Gigabyte UD750GM Power Supply Review

Tom’s Hardware Verdict

The Gigabyte UD750GM doesn’t stand out from the crowd, but it is affordable, has decent performance, and above all, it has properly set protection features.

Pros
  • +

    Full power at 47 degrees Celsius

  • +

    Properly set protection features

  • +

    Efficient

  • +

    Good soldering quality

  • +

    Tight load regulation at 12V

  • +

    Long hold-up time

  • +

    Low inrush current with 115V

  • +

    Not noisy at normal operating conditions

  • +

    Fully modular

  • +

    Two EPS and four PCIe 6+2 pin connectors

  • +

    Compatible with the alternative sleep mode

  • +

    Compact dimensions

  • +

    5-year warranty

Cons
  • Not competitive overall performance

  • Increased noise under stressful conditions

  • Transient response could be better

  • Loose load regulation on the minor rails

  • Doesn’t come with a (12VHPWR) 12+4 PCIe connector

  • The specs mention an HDB fan, but we found a rifle bearing one instead

  • Above 0. 1W vampire power with 230V

  • High inrush current with 230V

  • PF with 230V should be higher

  • Small distance between 4-pin Molex connectors

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The Gigabyte UD750GM is a decent PSU, but you won’t see it among the best PSUs because for $10 to $20 dollars more, someone can get the top-performing Corsair RM750x (2021) and the EVGA SuperNOVA 750 G6. 

We have already reviewed the 1000W member of the UD family, featuring a PCIe 12+4 pin connector, and we thought to also take a look at the smallest member of the lineup with 750W max power. The UD750GM is the successor of the P750GM, the first versions of which had severe reliability issues. Gigabyte released later upgraded versions of the P750GM and P850GM units. Still, there was no way to distinguish them from the older ones, and given the low popularity of these models, the best way was to introduce a new line, the UD one, which uses the upgraded P-GM platform. 

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The Gigabyte UD750GM uses a fully modular cable design, and it is Gold certified by 80 PLUS. In the Cybenetics scale, it achieves Platinum and Standard++ in efficiency and noise, respectively. The MEIC platform it uses is efficient and looks to have solved all reliability issues. A little bit too late, though. The 120 mm fan uses a rifle-bearing fan instead of the advertised hydro dynamic, and the warranty is long enough at five years. 

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Specifications

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Manufacturer (OEM) MEIC
Max. DC Output 750W
Efficiency 80 PLUS Gold, Cybenetics Platinum (89-91%)
Noise Cybenetics Standard++ (30-35 dB[A])
Modular ✓ (fully)
Intel C6/C7 Power State Support
Operating Temperature (Continuous Full Load) 0 — 40°C
Over Voltage Protection
Under Voltage Protection
Over Power Protection
Over Current (+12V) Protection
Over Temperature Protection
Short Circuit Protection
Surge Protection
Inrush Current Protection
Fan Failure Protection
No Load Operation
Cooling 120 mm Rifle Bearing Fan (D12SH-12)
Semi-Passive Operation
Dimensions (W x H x D) 150 x 85 x 140 mm
Weight 1. 42 kg (3.13 lb)
Form Factor ATX12V v2.31, EPS 2.92
Warranty 5 Years

Power Specifications

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Rail Row 0 — Cell 1 3.3V 5V 12V 5VSB -12V
Max. Power Amps 20 20 61 3 0.3
Row 2 — Cell 0 Watts Row 2 — Cell 2 105 732 15 3. 6
Total Max. Power (W) Row 3 — Cell 1 Row 3 — Cell 2 750 Row 3 — Cell 4 Row 3 — Cell 5 Row 3 — Cell 6

Cables & Connectors

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Description Cable Count Connector Count (Total) Gauge In Cable Capacitors
ATX connector 20+4 pin (610mm) 1 1 18AWG No
4+4 pin EPS12V (600mm) 2 2 18AWG No
6+2 pin PCIe (600mm+150mm) 2 4 18AWG No
SATA (600mm+150mm+150mm+150mm) 2 8 18AWG No
4-pin Molex (500mm+115mm+115mm) / FDD (+150mm) 1 3 / 1 18AWG No
AC Power Cord (1400mm) — C13 coupler 1 1 16AWG

The PSU includes all of connectors to deliver its full power without any problems, though it is weird that the ATX cable is longer than the EPS ones. Usually, it is the other way around. Moreover, there is no need for a floppy (FDD) connector. They could install a 4-pin Molex instead and provide a Molex to FDD adapter for users still needing this old connector. Lastly, it would be nice to have a 150 mm distance between the 4-pin Molex connectors, which is the case for the SATA ones. 

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Component Analysis

We strongly encourage you to have a look at our PSUs 101 article, which provides valuable information about PSUs and their operation, allowing you to better understand the components we’re about to discuss.

Swipe to scroll horizontally

General Data
Manufacturer (OEM) MEIC
PCB Type Double Sided
Primary Side
Transient Filter 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV, 1x Chipown PN8200 (Discharge IC)
Inrush Protection NTC Thermistor & Relay
Bridge Rectifier(s) 2x GBU1506 (800V, 15A @ 100°C)
APFC MOSFETs 2x NCE Power NCE65TF099F (650V, 24A @ 100°C, Rds(on): 0. 109Ohm)
APFC Boost Diode 1x JF SC0665 (650V, 6A @ 175°C)
Bulk Cap(s) 1x Nippon Chemi-Con (400V, 680uF, 2,000h @ 105°C, KMW)
Main Switchers 2x NCE Power NCE65TF099F (650V, 24A @ 100°C, Rds(on): 0.109Ohm)
APFC Controller Champion CM6500UNX
Resonant Controller Champion CM6901X
Topology Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side
+12V MOSFETs no info
5V & 3.3V DC-DC Converters: 4x Alpha & Omega AON6354 (30V, 52A @ 100°C, Rds(on): 4. 4mOhm)
PWM Controllers: 2x uPI-Semi uP9303B
Filtering Capacitors

Electrolytic: 10x Lelon (4-7,000h @ 105°C, RXW), 2x Lelon (4-10,000h @ 105°C, RZW), 4x Lelon (2-5,000h @ 105°C, RXK)
Polymer: 8x Lelon

Supervisor IC Weltrend WT7502R (OVP, UVP, SCP, PG)
Fan Model Yate Loon D12SH-12 (120 mm, 12V, 0.30A, Rifle Bearing Fan)
5VSB Circuit
Rectifier 1x JF Semiconductor SP10U45L SBR (45V, 10A)
Standby PWM Controller PR8109T

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The platform is provided by MEIC, which had a tricky entry into the desktop PSU design with the P-GM series. MEIC is mainly known for its power adapters. To the best of our knowledge, Gigabyte is the first to use this OEM for desktop PSUs. The design is clean, and the heatsinks are large enough to cope with the thermal loads. The soldering quality is excellent, but the parts that Gigabyte used are not among the best, especially the cooling fan. 

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The transient filter is complete. Besides an MOV and an NTC thermistor and relay combo, we also found a discharge IC to restrict energy losses on the X caps. 

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The pair of bridge rectifiers can handle up to 30A combined. 

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The APFC converter uses two NCE Power FETs and a single boost diode. The bulk cap is by Chemi-Con. 

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The main FETs are installed in a half-bridge topology. An LLC resonant converter is also used to boost efficiency. 

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We couldn’t identify the 12V FETs without desoldering the heat sinks, which could damage them, and we needed the PSU to be fully operational in case we need to retest it in the future. 

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The filtering caps are by Lelon. On paper, their specs are top-notch, but I’m typically skeptical of lesser-known manufacturers. Recent problems in capacitor manufacturing so getting hold of high-quality caps is challenging, if not impossible. 

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The standby PWM controller is a PR8109T IC.  

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On the face of the modular board we find several electrolytic and polymer caps. 

(Image credit: Tom’s Hardware)

The main supervisor IC is a Weltrend WT7502R. 

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Soldering quality is excellent.

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We are not fond of Yate Loon fans. Gigabyte should use another brand for the cooling fan, one of the most critical parts of a PSU. 

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Specifications and Part Analysis

Next Page Load Regulation, Hold-Up Time, Inrush & Leakage Current, Efficiency and Noise

Aris Mpitziopoulos is a Contributing Editor at Tom’s Hardware US, covering PSUs.

Gigabyte GP-P750GM Power Supply Review: Lacking the Explosive Character

Tom’s Hardware Verdict

The newer version of the GP-P750GM operates as it should, without explosions and fireworks once the platform is stressed.

Pros
  • +

    + Full power at 46 degrees Celsius

  • +

    + Properly set over-power protection

  • +

    + Tight load regulation at 12V

  • +

    + Efficient 5VSB rail

  • +

    + Compact dimensions

  • +

    + Good soldering quality

  • +

    + Fully modular

  • +

    + Two EPS and four PCIe connectors

  • +

    + 5-year warranty

Cons
  • Not so high overall performance

  • Disappointing transient response at +12 V and 3.3 V

  • Inrush currents should be lower

  • Rifle bearing cooling fan

  • Low efficiency with 2% load

  • Slightly below 17ms hold-up time

  • EMI suppression could be better

  • EPS and SATA cable length issues

  • Not compatible with the alternative sleep mode

Why you can trust Tom’s Hardware
Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out more about how we test.

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We got our hands on an updated P750GM unit, which didn’t explode during our extensive tests. While that’s definitely a step up over the previous model, it’s not enough, since its performance is not up to the competition’s levels. This is not a unit for our best PSUs page. You’d be better off taking a look at the Corsair RM750x and the XPG Core Reactor Reactor with similar capacity.  

You could find many references online to problems about the Gigabyte P750/850 GM units. TechPowerUp’s unit blew, and the same was the case for several units tested by the Gamers Nexus YouTube channel. All this fuss eventually forced Gigabyte to issue a statement and take back some of these units. According to Gigabyte, the problem was due to the over power protection high setting, which was lowered in the new models. Unfortunately, there is no way to distinguish the new production P750/850GM units from the original ones. But we are certainly curious to find out the differences between the old and new platforms. 

  • Gigabyte GP-P750GM (Gold) at Newegg for $136.99

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The Gigabyte GP-P750GM is a fully modular unit addressing mid-level systems. It offers Gold efficiency in the 80 PLUS program and Platinum in the Cybenetics standard. The new one has a more aggressive fan speed profile for lower internal temperatures compared to the previous generation. There are also some changes on the PCB, which we will explain in detail in the part analysis section. 

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Specifications

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Manufacturer (OEM) MEIC
Max. DC Output 750W
Efficiency 80 PLUS Gold, Cybenetics Platinum (89-91%)
Noise Cybenetics Standard++ (30-35 dB[A])
Modular ✓ (fully)
Intel C6/C7 Power State Support
Operating Temperature (Continuous Full Load) 0 — 40°C
Over Voltage Protection
Under Voltage Protection
Over Power Protection
Over Current (+12V) Protection
Over Temperature Protection
Short Circuit Protection
Surge Protection
Inrush Current Protection
Fan Failure Protection
No Load Operation
Cooling 120mm Rifle Bearing Fan (D12SH-12)
Semi-Passive Operation
Dimensions (W x H x D) 150 x 85 x 140mm
Weight 1. 35 kg (2.98 lb)
Form Factor ATX12V v2.52, EPS 2.92
Warranty 5 Years

Power Specifications

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Rail   3.3V 5V 12V 5VSB -12V
Max. Power Amps 20 20 61 3 0.3
  Watts   105 732 15 3.6
Total Max. Power (W) 750

Cables & Connectors

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Description Cable Count Connector Count (Total) Gauge In Cable Capacitors
ATX connector 20+4 pin (600mm) 1 1 18AWG No
4+4 pin EPS12V (600mm) 2 2 18AWG No
6+2 pin PCIe (600mm+150mm) 2 4 18AWG No
SATA (600mm+150mm+150mm+150mm) 2 8 18AWG No
4-pin Molex (500mm+110mm+110mm) / FDD (+150mm) 1 3 / 1 18AWG No
AC Power Cord (1380mm) — C13 coupler 1 1 18AWG

The PSU has enough cables and connectors, including two EPS and four PCIe. The EPS cables should be longer, though, at 650mm (26 inches). And the SATA power connectors have a short distance between them. 

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Component Analysis

We strongly encourage you to have a look at our PSUs 101 article, which provides valuable information about PSUs and their operation, allowing you to better understand the components we’re about to discuss.

Swipe to scroll horizontally

General Data
Manufacturer (OEM) MEIC
PCB Type Double Sided
Primary Side
Transient Filter 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV, 1x Chipown PN8200 (Discharge IC)
Inrush Protection NTC Thermistor 5D-15 (5 Ohm) & Relay
Bridge Rectifier(s) 2x GBU1006 (600V, 10A @ 100°C)
APFC MOSFETs 2x Jilin Sino-Microelectronics JCS18N50FH (500V, 11A @ 100°C, Rds(on): 0. 27Ohm)
APFC Boost Diode 1x JFSC0665
Bulk Cap(s) 1x Nippon Chemi-Con (400V, 680uF, 2,000h @ 105°C, KMW)
Main Switchers 2x Jilin Sino-Microelectronics JCS18N50FH (500V, 11A @ 100°C, Rds(on): 0.27Ohm)
APFC Controller Champion CM6500UNX
Resonant Controller Champion CM6901X
Topology Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side
+12V MOSFETs 4x NCE Power NCEP40T15GU (40V, 106A @ 100°C, Rds(on): 1.35mOhm)
5V & 3.3V DC-DC Converters: 4x Alpha & Omega AON6354 (30V, 52A @ 100°C, Rds(on): 3. 3mOhm)
PWM Controllers: 2x uPI-Semi uP9303B
Filtering Capacitors Electrolytic: 1x Chn Cap (4-10,000h @ 105°C, TY), 1x Chn Cap (3-7,000h @ 105°C, TP), 4x Chn Cap (2-5,000h @ 105°C, TM), 5x YC (105°C, LE), 2x KYS (105°C, SG) Polymer: 12x no info
Supervisor IC Grenergy GR8313 (OVP, UVP, SCP, PG)
Fan Model Yate Loon D12SH-12 (120mm, 12V, 0.30A, Rifle Bearing Fan)
5VSB Circuit
Rectifier 1x JF Semiconductor SP10U45L-T SBR (45V, 10A)
Standby PWM Controller PR8109T

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MEIC provides this platform, and although the soldering quality is good, we still found some parts from unknown manufacturers, including the filtering caps on the secondary side. Not many parts are different from the previous model, which had higher OPP and OCP thresholds. The bulk cap has changed from KMR line to KMW, and the rest of the part differences are located in the 5VSB circuit. Besides parts, there are some changes in the design of the main PCB, which we’ll discuss below. 

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On the left is the old platform and on the right is the new one. The difference in design is located near the LLC resonant controller. The resistance of R94 has decreased, and the layout is also different. R94 is connected to the ILIM pin of the CM6901 controller, which is responsible for OPP’s triggering point. If MEIC just wanted to lower OPP, there was no reason to change the layout in this area. A simple resistor replacement would do. Apparently, the company needed to tweak the design, so it decided to change the PCB.  

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The transient filter has all required components, including a discharge IC and an MOV. An NTC thermistor and bypass relay combo protect against large inrush currents.

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The pair of bridge rectifiers can handle up to 20A of current, which is enough for this platform. 

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The APFC converter uses a pair of Jilin Sino-Microelectronics FETs and a JFSC0665 boost diode. Nippon Chemi-Con provides the bulk cap, and the APFC controller is by Champion. 

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The main FETs are installed in a half-bridge topology. An LLC resonant converter is used to boost efficiency.

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Four NCE Power FETs regulate the 12V rail, and the minor rails are generated through a couple of DC-DC converters. 

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Less-known manufacturers provide all filtering caps on the secondary side. Thankfully, there is a large number of polymer caps, which are more tolerant to heat. 

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The standby PWM controller is a PR8109T IC, and the standby rectifier is a JF Semiconductor SBR. 

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We find four electrolytic and two polymer caps on the modular board. 

(Image credit: Tom’s Hardware)

The main supervisor IC is a Grenergy GR8313.  

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Soldering quality is good. 

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Gigabyte claims that the fan uses a Hydraulic bearing (HYB), but in fact it has a rifle bearing that is of lower quality. Yate Loon fans are among the cheapest.

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Aris Mpitziopoulos is a Contributing Editor at Tom’s Hardware US, covering PSUs.

Gigabyte is recalling the controversial GP-P750GM and GP-P850GM power supplies, although it is confident in their reliability

3DNews Technologies and IT market. News power supplies, adapters, power supplies… Gigabyte recalls controversial power supplies…


08/13/2021 [21:46],

Nikolai Khizhnyak

Gigabyte has made an official statement after the mass reports of the total marriage of some models of its power supplies. In particular, we are talking about the models Gigabyte GP-P850GM and GP-P750GM. According to journalists, marriage exists in about half of the blocks. A number of specialized publications confirmed that the PSUs they received for reviews failed under load. nine0007

Image Source: Vortez

The company released the following official statement:

“Gigabyte is aware that some media have questioned the quality of its GP-P850GM and GP-P750GM power supplies. Gigabyte takes pride in the design and quality of its products, and therefore takes these reports very seriously. We would like to come up with a solution to this potential problem as follows:

  1. When using desktop PCs, there are times when peak power consumption exceeds the allowable performance of the power supply itself. For such cases, the Gigabyte GP-P850GM and GP-P750GM PSU models provide Over Power Protection (OPP) protection. It automatically shuts down the PC in the case when the power indicator exceeds the allowable power output limits laid down in the PSU itself. For models GP-P850GM and GP-P750GM, the OPP function allows you to exceed the power limit by 20% to 50% over the declared power limit. Thus, GP-P850GM can provide 1020 ~ 1300 W of power for a short time, while GP-P750GM can provide 900~1125W power supply.
  2. Gigabyte appreciates and welcomes any feedback or suggestions from our media partners and PC professionals. Third-party sources have alerted us to potential shutdown issues with the GP-P850GM and GP-P750GM PSUs during high current tests using equipment that simulates a load for an extended period of time and in conditions close to OPP protection. Such lengthy tests may shorten the life of the GP-P850GM and GP-P750GM PSU components. nine0024
  3. To prevent these potential problems found by third parties, particularly when testing PSUs using load simulation equipment for extended periods of time and under conditions close to OPP protection, Gigabyte announces a lower load limit. on the PSU before the OPP protection trips. For GP-P850GM, the new values ​​are 950 ~ 1050 W, and for GP-P750GM, the new values ​​are 825 ~ 925 W.
  4. Gigabyte highly appreciates the trust of its customers in the quality of its products and subsequent service. However, we would like to emphasize that the potential problems with our PSUs previously reported seem to occur only when using equipment that simulates a load for an extended period of time and under conditions close to OPP protection, and not in real conditions, normal, everyday use of the PSU.
  5. Power supply models GP-P850GM and GP-P750GM comply with all necessary safety standards and are equipped with OCP (Overload Protection), OTP (Over Temperature Protection), OVP (Over Voltage Protection), OPP (Over Power Protection) technologies , UVP (under voltage protection) and SCP (short circuit protection).
  6. To reassure owners of the GP-P850GM and GP-P750GM power supplies, Gigabyte is ready to replace them. For the first model, the manufacturer offers to replace the PSU with model numbers from SN20343G031011 to SN20513G022635, for the second — from SN20243G001301 to SN20453G025430. nine0024

As follows from the official statement, Gigabyte is not ready to admit manufacturing defects, and continues to reject quality claims. Cases of block failure are attributed to artificial conditions that journalists specifically create for testing purposes. At the same time, the company prefers not to notice the numerous negative reviews from customers.

However, Gigabyte is willing to replace these PSUs for users, even though they appear to have performed well before and after the change in OPP protection. However, it should be borne in mind that the replacement conditions may differ from the region where these PSU models were purchased. For more information on this matter, the company recommends contacting your local Gigabyte Service Center. nine0007

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Gigabyte GP-P750GM Review — A Power Supply with an explosive attitude0130

GIGABYTE GP-G750H PSU Quick Review

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Description

Fully modular design. 120mm intelligent fan, hydraulic bearing (HYB). Japanese capacitors. Dedicated +12V power line. OVP/OPP/SCP/UVP/OCP/OTP protection circuits. Compact dimensions. The 80 Plus Gold certified power supply is 90% efficient at 50% load. A measure of high energy efficiency is a reduction in the cost of idle energy consumption, optimal heat dissipation and a minimum noise level. As part of an Intel CPU-based system, these power supplies can significantly reduce energy costs and save your investment. nine0007

Characteristics (7)

900PL3

Certificate0085

Parameter Value
The number of fans 1 9000 9000 4×6+2-Pin PCIN board and processor 20+4 pin
Fan(s) size, mm 120
SATA connectors, pcs 8
Gold
Country China

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  • Aerocool
  • Apeyron
  • Arlight
  • ASUS
  • be quiet!
  • Chieftec
  • Cisco
  • Cooler Master
  • Corsair
  • DeepCool
  • Deko-light
  • Dell
  • Donolux
  • Exegate
  • Feron
  • FSP
  • Gauss
  • Gigabyte
  • Ginzzu
  • Globo
  • HIPER
  • HP
  • Jazzway
  • Lenovo
  • Seasonic
  • Super Flower
  • Supermicro
  • SWG
  • Thermaltake
  • Uniel
  • Xilence
  • Zalman
  • Bastion
  • LIGHT TECH