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) |
| 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.
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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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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
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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
Swipe to scroll horizontally
| 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
Swipe to scroll horizontally
| 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
Swipe to scroll horizontally
| 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.
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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.
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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.
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 Source:
If you notice an error, select it with the mouse and press CTRL+ENTER. Related materials Permanent URL: Headings: Tags: ← |
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: 
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 
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DescriptionFully 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)
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