GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review

GIGABYTE's new UD850GM PG5 V2 850-watt PSU with a 600-watt 12VHPWR connection gets put under the spotlight and fully tested. Should you buy it? Let's see.

Published
Manufacturer: GIGABYTE
4 minutes & 55 seconds read time
TweakTown's Rating: 90%
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The Bottom Line

The UD850GM PG5 V2 from GIGABYTE is a solid 850-watt PSU with a 600-watt 12VHPWR connection. However, 850 watts these days are cutting things a bit close.

Pros

  • + Aggressive price point
  • + Compact design
  • + Japanese company Nippon Chemi-Con makes the main capacitor

Cons

  • - 5-year warranty

Should you buy it?

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Introduction, Specifications, and Pricing

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review 1

So today, we have a PSU from GIGABYTE. GIGABYTE, in the past for PSUs, has not been in the good graces of builders, mainly for fear of their PSUs from blowing up. Today we have the second version, V2, of the UD850GM PG5 80 Plus Gold rated ATX 3.0 PSU for review.

The MSRP pricing for the UD850GM is set at $139.99 and it comes with a five-year warranty, down from the 10 years we see on many these days. However, it can be found for $114.99 regularly. This price point is aggressive for an ATX 3.0 PSU, so hopefully, this one doesn't go up in smoke. Other specifications of the UD850GM are typical for an 850-watt ATX 3.0 PSU that is 80 Plus Gold rated, with a single 12VHPWR connector with 600 watts available to the GPU.

Buy at Amazon

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU

TodayYesterday7 days ago30 days ago
$99.99$106.99$104.99
Buy at Newegg
$99.99$106.99$104.99
* Prices last scanned on 4/21/2024 at 3:11 pm CDT - prices may not be accurate, click links above for the latest price. We may earn an affiliate commission.

Packaging

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review 2

GIGABYTE has packaged the UD850GM in a reasonably standard cardboard box with a fair bit of product information and specifications.

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review 3

The inside packaging on the UD850GM shows black soft foam with the cabling in a clear plastic bag.

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review 4

The UD850GM again is packed with a black soft form that encases the entire PSU while in shipment. However, the thickness of the foam is a little concerning; if the retail packaging was dropped, the PSU could be damaged.

Outside the GIGABYTE UD 850w V2 ATX 3.0 Gold PSU

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review 5

The cabling removed from its packaging is all flat black ribbon style, with only the 600w 12VHPWR connector being sleeved.

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review 6

The 12VHPWR connector feels good in the hand and is rated for 600 watts the 12VPWR can handle.

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review 7

Taking the UD850GM out of the black foam packaging, the UD850GM has a very standard look for a PSU with a honeycomb mesh grille for the 120mm fan, along with gray highlights on a black base.

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review 8

The side of the UD850GM shows more gray designs, the Ultra Durable branding, and that it's a Gold 850. GIGABYTE is also in the lower right corner.

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review 9

The cable input side of the UD850GM consists of a split 24-pin motherboard input with a 20 by 12 configuration. Next to the motherboard inputs are two CPU or PCIe 8-pin cable inputs, while an additional CPU/PCIe 8-pin is directly below. In the very center of UD850GM is the full 600-watt 12VHPWR connection. The last three connections are for three 6-pin peripheral, SATA, or MOLEX cabling.

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review 10

The bottom of the UD850GM has the traditional electrical label with almost 71 amps on the +12V rail. The 12VHPWR connection is on a separate rail with 55 amps to it.

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review 11

The backside, again, is remarkably understated with honeycomb mesh ventilation, an I/O rocker switch, and power input.

Inside the GIGABYTE UD 850w V2 ATX 3.0 Gold PSU

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Once inside the UD850GM, the fan, which for the astute is none other than a Yate Loon fan, model number D12SH-12, Yate Loon fans were extremely popular with water-cooling enthusiasts for their high CFM to noise ratio. This particular Yate Loon fan is rated for 2,200 RPM at 40dB with 88 CFM.

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review 13

The internals of the UD850GM is pretty minimalistic, with a few black heatsinks, a single larger capacitor, and secondary and primary transformers. Overall a clean approach.

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review 14

The Japanese capacitor used here is from KMW, aka Nippon Chemi-Con. It is rated for 400v with 820 microfarads.

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review 15

The primary transformer seems small but should be sufficient.

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review 16

The two yellow secondary transformers are mounted to a daughterboard, and the soldering is perfect.

Ryan's Test System

Testing & Final Thoughts

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU Review 17

When testing the UD850GM, it became apparent that an 850-watt PSU, with today's power consumption needs, seems inadequately equipped to handle a high-end CPU and GPU when used together. Now I realize that most people wouldn't stress test both the CPU and GPU simultaneously, but having that extra headroom makes me think better about the entire system's stability. That extra wattage, not so much the 80 Plus certification rating once you get past 80 Plus Gold, makes the peace of mind worthwhile. And also, let's be honest here: your computer's PSU is usually the last thing you think about when upgrading your PC to the latest platform or fastest GPU.

Moving on to PSU testing, I usually shoot for a 50% PSU load, which ensures the best possible efficiency. I then set my sights on loading up my test system to around 425 watts, about 50% of the 850 watts the UD850GM PG5 V2 is capable of. Coming close with around 435 watts, I am okay with going above 10 watts over the 50% threshold. The AMD Ryzen 9 7950X hovered just above 180 watts while running full tilt, while the iGPU onboard pulled an additional 60 to 80 watts above and beyond the 180 watts.

The other big power user, the NVIDIA RTX 3090, had to be cut down to a 45% power draw via GeForce Performance settings, making it shy of 160 watts. Using a KillaWatt P3 Electricity monitor, the wattage drawn from the wall netted about 470 watts, making the UD850GM PG5 Rev 2 about 92.6% efficient, easily surpassing the 80 Plus Gold certification.

In closing, is the UD850GM PG5 Rev 2 a good PSU? Yes, it is, for the most part. GIGABYTE looked at what happened to their previous PSUs and tried to make them safer, more stable, and ultimately better. My only gripe is that the Yate Loon fan that GIGABYTE has decided to use, while does provide good airflow, is quite loud compared to the rest of the system.

Back to current pricing, the UD850GM PG5 V2 has an MSRP of $139.99; however, it currently is sitting at $114.99, which for an ATX 3.0 PSU with a full 600-watt 12VHPWR connection, is still pretty good. That said, there are more than a few solid competing PSUs in the 1,000-watt PSU arena to compare against the UD850GM PG5 V2 for about the same amount of money.

Would I recommend the UD850GM PG5 V2 to anyone? No, not to the high-end enthusiast builder, but probably someone looking to build a computer with an AMD Ryzen 5 or Intel Core i5 CPU while running a mid-range GPU from either team green or team red. Under those components, the system should hover around 50% load and be optimal for efficiency.

Photo of product for sale

Performance

90%

Quality

90%

Features

90%

Value

90%

Overall

90%

The Bottom Line

The UD850GM PG5 V2 from GIGABYTE is a solid 850-watt PSU with a 600-watt 12VHPWR connection. However, 850 watts these days are cutting things a bit close.

TweakTown award
90%

GIGABYTE GP-UD850GM PG5 850w Rev 2 ATX 3.0 Gold PSU

TodayYesterday7 days ago30 days ago
$99.99$106.99$104.99
Buy at Newegg
$99.99$106.99$104.99
* Prices last scanned on 4/21/2024 at 3:11 pm CDT - prices may not be accurate, click links above for the latest price. We may earn an affiliate commission.

Ryan joined TweakTown in 2022, but that doesn’t mean he hasn’t been around the block a time or two. He has always been a gamer through and through, and building PCs started when he took apart his family’s 486 DX2-based PC. He is into everything PC but enjoys building, gaming, and water cooling.

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