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Gigabyte UD750GM Power Supply Review

Decent, efficient, and with a reasonable price tag.

Gigabyte UD750GM
(Image: © Tom's Hardware)

Protection Features

Check out our PSUs 101 article to learn more about PSU protection features.

OCP (Cold @ 25°C)12V: 81.8A (134.1%), 11.998V
5V: 24.8A (124%), 5.117V
3.3V: 22A (110%), 3.352V
5VSB: 4.5A (150%), 4.991V
OCP (Hot @ 44°C)12V: 81.8A (134.1%), 12.007V
5V: 23.3A (116.5%), 5.120V
3.3V: 20.3A (101.5%), 3.343V
5VSB: 4.5A (150%), 4.993V
OPP (Cold @ 27°C)981.43W (131.08%)
OPP (Hot @ 43°C)982.05W (134.16%)
OTP✓ (131°C @ 12V Heat Sink)
SCP12V to Earth: ✓
5V to Earth: ✓
3.3V to Earth: ✓
5VSB to Earth: ✓
-12V to Earth: ✓
PWR_OKProper operation
NLO
SIPSurge: MOV
Inrush: NTC Thermistor & Bypass relay

It is nice to see all protection features adequately set. MEIC paid extra attention to protection features, which are essential to every electronic device, including PSUs. 

DC Power Sequencing

According to Intel’s most recent Power Supply Design Guide (revision 1.4), the +12V and 5V outputs must be equal to or greater than the 3.3V rail at all times. Unfortunately, Intel doesn't mention why it is so important to always keep the 3.3V rail's voltage lower than the levels of the other two outputs.

No problems here since the 3.3V rail is always lower than the other two. 

Cross Load Tests

To generate the following charts, we set our loaders to auto mode through custom-made software before trying more than 25,000 possible load combinations with the +12V, 5V, and 3.3V rails. The deviations in each of the charts below are calculated by taking the nominal values of the rails (12V, 5V, and 3.3V) as point zero. The ambient temperature during testing was between 30 to 32 degrees Celsius (86 to 89.6 degrees Fahrenheit).

Load Regulation Charts

Efficiency Graph

(Image credit: Tom's Hardware)

Ripple Graphs

The lower the power supply's ripple, the more stable the system will be and less stress will also be applied to its components.

Infrared Images

We apply a half-load for 10 minutes with the PSU's top cover and cooling fan removed before taking photos with a modified Fluke Ti480 PRO camera able to deliver an IR resolution of 640x480 (307,200 pixels).

The platform's high efficiency minimized energy losses. Thus the heat loads are lower. This is why our IR camera didn't show any high-temperature parts during this test. 

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Aris Mpitziopoulos
Aris Mpitziopoulos

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

  • Tom Sunday
    I will shortly be in the market for a new PSU and as part of a complete new generation ‘PC Build’ this coming December. Due to the extreme system importance of a PSU selection I never at first look at the pricing or its reasonable cost compared to other brands. But surely a 10-year unblemished warranty has usually driven me to EVGA and SEASONIC products. I am also now prone in looking at PSU’s with over 1200W as the new 4000 series GPU’s and other hardware coming on stream will become so much more demanding and power hungry. Enthusiasts I believe will also now be keeping their primary “Builds” much longer (5-years or more?) as hardware cost are spiraling out of control. So 10-year warranties and RMA services area big deal for me among many other expected PSU offerings like direct software control, digital readouts on the PSU itself, high quality cabling and product finishes.
    Reply
  • PiranhaTech
    I'm curious if you did the GamersNexus tests. A lot of PC builders are going to wait for their tests before considering a Gigabyte PSU due to the exploding PSU issue they had

    aACtT_rzToIView: https://www.youtube.com/watch?v=aACtT_rzToI
    Reply