The Gigabyte UD850GM appears to have solved all the issues of its predecessor, but it surely stays behind in general efficiency. You count on a brand new mannequin to supply increased efficiency than the earlier one, however this isn’t the case right here. Nonetheless, we select reliability over efficiency any day of the week. If you’d like one thing higher, it’s best to take a look at the Corsair RM850x, which lives on our greatest PSUs article, and the Cooler Grasp V850 Gold V2.
The Gigabyte UD sequence nonetheless makes use of MEIC, the identical OEM because the legendary P-GM sequence. Nonetheless, the platforms have been upgraded to deal with the failures of previous fashions. The decrease capability members of the road do not have a PCIe 5.0 connector, opposite to the 1000 W mannequin. That stated, a connector addition would not present compatibility with the latest ATX v3.0 spec. The transient exams for the PSUs having a PCIe 5.0 connector are further robust, and we count on that many models won’t be able to move them. The UD850GM solely has legacy PCIe connectors, so we can’t check it below the brand new transient response eventualities.Â
The Gigabyte UD850GM has compact dimensions and is totally modular. As well as, its worth typically falls under 100 {dollars}, making it a superb deal given its spec. It’s licensed as Gold by 80 PLUS and Platinum by Cybenetics, and likewise has a Customary++ noise score by the latter certification company. In line with Gigabyte, it makes use of a hydraulic bearing fan, however we discovered a rifle bearing as an alternative.Â
Specs
| Producer (OEM) | MEIC |
| Max. DC Output | 850W |
| Effectivity | 80 PLUS Gold, Cybenetics Platinum (89-91%) |
| Noise | Cybenetics Customary++ (30-35 dB[A]) |
| Modular | ✓ (totally) |
| Intel C6/C7 Energy State Assist | ✓ |
| Working Temperature (Steady Full Load) | 0 – 40°C |
| Over Voltage Safety | ✓ |
| Beneath Voltage Safety | ✓ |
| Over Energy Safety | ✓ |
| Over Present (+12V) Safety | ✓ |
| Over Temperature Safety | ✓ |
| Quick Circuit Safety | ✓ |
| Surge Safety | ✓ |
| Inrush Present Safety | ✓ |
| Fan Failure Safety | ✗ |
| 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 | 1.46 kg (3.22 lb) |
| Kind Issue | ATX12V v2.31, EPS 2.92 |
| Guarantee | 5 Years |
Energy Specs
| Rail | 3.3V | 5V | 12V | 5VSB | -12V | |
| Max. Energy | Amps | 20 | 20 | 70.8 | 3 | 0.3 |
| Watts | 105 | 849.6 | 15 | 3.6 | ||
| Complete Max. Energy (W) | 850 |
Cables & Connectors
| Description | Cable Rely | Connector Rely (Complete) | 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 Energy Twine (1400mm) – C13 coupler | 1 | 1 | 16AWG | – |
The PSU has sufficient EPS and legacy PCIe connectors however lacks a 12+4 pin PCIe, so it will not be suitable with the upcoming generations of high-performance GPUs. You would possibly have the ability to use adapters, however such options usually are not superb for high-power playing cards.Â
The decrease than 150mm distance between the 4-pin Molex connectors shouldn’t be superb, particularly for a big chassis. One other small element we seen is the mounted FDD connector, which is of no use as we speak. If Gigabyte wished to incorporate this connector, it may provide an adapter.Â
Part Evaluation
We strongly encourage you to take a look at our PSUs 101 article, which supplies useful details about PSUs and their operation, permitting you to raised perceive the parts we’re about to debate.
| Common Information | – |
| Producer (OEM) | MEIC |
| PCB Sort | Double Sided |
| Main Aspect | – |
| Transient Filter | 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV, 1x Chipown PN8200 (Discharge IC) |
| Inrush Safety | NTC Thermistor & Relay |
| Bridge Rectifier(s) | |
| APFC MOSFETs |
2x NCE Energy NCE65TF099F (650V, 24A @ 100°C, Rds(on): 0.109Ohm)
|
| APFC Increase Diode |
1x JF SC1065 (600V, 10A @ 156°C)
|
| Bulk Cap(s) |
1x Nippon Chemi-Con (400V, 820uF, 2,000h @ 105°C, KMW)
|
| Major Switchers |
2x NCE Energy NCE65TF099F (650V, 24A @ 100°C, Rds(on): 0.109Ohm)
|
| APFC Controller | |
| Resonant Controller | Champion CM6901X |
| Topology |
Main aspect: APFC, Half-Bridge & LLC converter |
| Secondary Aspect | – |
| +12V MOSFETs | no data |
| 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), 2x Lelon (2-5,000h @ 105°C, RXK) |
| Supervisor IC | Weltrend WT7502R (OVP, UVP, SCP, PG) |
| Fan Mannequin | Yate Loon D12SH-12 (120mm, 12V, 0.30A, Rifle Bearing Fan) |
| 5VSB Circuit | – |
| Rectifier |
1x JF Semiconductor SP10U45L SBR (45V, 10A)
|
| Standby PWM Controller | PR8109T |
The platform is supplied by MEIC and has some updates, in comparison with the P-GM models, to enhance reliability. The PCB is small, however the construct high quality is excessive. The warmth sinks are massive sufficient, and the clear design permits for good airflow. The OEM used a half-bridge topology and an LLC resonant converter on the first aspect. We additionally discover a synchronous rectification scheme and a pair of DC-DC converters on the secondary aspect.Â
The transient/EMI filter has all needed components, together with a discharge IC to supply a slight vitality increase.Â
An MOV and an NTC thermistor deal with surge and inrush present protections. A bypass relay helps the latter.Â
The pair of bridge rectifiers can ship as much as 30A, mixed.Â
The APFC converter makes use of two FETs and a single increase diode, which might deal with as much as 10A. The majority cap is by Chemi-Con and belongs to a superb line (KMW).Â
The primary FETs are put in right into a half-bridge topology. An LLC resonant converter can also be used to spice up effectivity.Â
Two warmth sinks hid the 12V FETs, that are put in on the enterprise aspect of the PCB. We did not attempt to take away the latter as a result of we may hurt the FETs, rendering the PSU ineffective.Â
The filtering caps are by Lelon, a model that’s not among the many know ones. Nonetheless, in as we speak’s market, it’s tremendous robust and costly to search out caps from top-notch producers like Chemi-Con and Rubycon, so it’s best to get used to seeing much less identified caps.Â
The standby PWM controller is a PR8109T IC and the 5VSB rectifier on the secondary aspect is an SP10U45L SBR.Â
A number of polymer and electrolytic caps are put in on the modular board, forming a secondary ripple filtering layer.Â
The primary supervisor IC is a Weltrend WT7502R.
Soldering high quality is nice.Â
The cooling fan makes use of a rifle bearing. We wish a better high quality fan, though this is able to improve the product’s worth. Followers are of excessive significance to any digital gadget, particularly PSUs.Â
MORE:Â Greatest Energy Provides
