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The Seasonic PRIME GX features 80+ Gold certification, a 100% modular design and allows fanless operation below 40% load. It features a quiet 135mm fan and rich connectivity to power the most powerful components with reliable and stable voltage.
Featuring the latest technological advances, the PRIME GX maintains the output voltage within a very tight range, achieving load regulation of less than 0.5% (MTLR). This impressive power performance and stability make this power supply an ideal choice for high performance systems.
The 135mm high performance fan in this power supply is designed to take advantage of the impact absorption effects of oil. It is extremely reliable and generates much less operating noise and heat than ball-bearing fans. Lubrication of the bearing surface reduces friction and vibration, thus reducing overall energy consumption. Due to the effortless and quieter rotations and the robust construction, this proven fan technology also increases the life of the fan.
This Seasonic PRIME power supply features the Premium Hybrid Fan Control system, which minimises the noise generated by the fan. Below 40% load, the unit is in 0dB (fanless) mode and then the fan turns on in proportion to the load of the configuration.
Seasonic engineers have implemented a new internal design, where instead of cables, the back panel and the PCB (Printed Circuit Board) are connected by a copper plate. This solution not only reduces the risks during assembly, but also improves the quality and reliability of the power output.
Select your criteria
General information |
Product name |
Seasonic PRIME GX-850 |
Brand |
Seasonic | |
Model |
PRIME-GX-850 | |
Power and Efficiency |
Power |
850 W |
80 PLUS certification |
Yes | |
80 PLUS / Cybenetics certification |
80 PLUS Gold | |
Connectivity |
Modular |
Yes |
Modularity |
100% modular | |
Power connector(s) |
2 X +12V (Power supply P8 - 2 x P4) | |
| 14 X Serial ATA power supply | ||
| 1 X ATX 20 + 4 Pin | ||
| 1 X Molex Floppy Disk 4 Pin Female | ||
| 5 X Molex (4 Pin) Female | ||
| 6 X PCI Express 6 + 2 Pin | ||
Configurator |
PSU-CM compatibility |
+12V P4 |
| +12V P4 and +12V P4 | ||
| +12V P8 | ||
| +12V P8 and +12V P4 | ||
| +12V P8 and +12V P8 | ||
Cooling |
Fan size |
135mm |
Silent |
Yes | |
Power supply type (PC) |
Active | |
Design |
Power format |
ATX/EPS |
Power supply standard |
ATX12V | |
| EPS12V | ||
ATX 3.0 |
No | |
ATX 3.1 |
No | |
Multi-GPU |
3-way CrossFireX | |
| 3-way SLI | ||
| CrossFireX | ||
| SLI | ||
Typical use |
Desktop computer | |
Physical characteristics |
Color |
Black |
LED RGB |
No | |
Height |
86 mm | |
Width |
150 mm | |
Length |
170 mm | |
Warranties |
Commercial warranty |
Seller 2 years
|
Legal warranty |
See terms & conditions
|
See all Seasonic products
Product referenced on 27 Jan 2020
It's top of the range, but the product I received makes a very unpleasant noise when the fan starts up, and does so as soon as I receive it.
As a result, I don't use the passive power supply mode with intermittent fan activation.
Shame, it was a selling point for my silent PC and helped justify the price.
I'm quite disappointed with this feed. It does the job, no worries there. But it is much noisier than advertised. It is clearly audible when the fan is running, but the worst is the noise it makes when the fan starts/stops.
Working already almost a week, very quiet, enough for i5 + 3060Ti. Nothing bad to say. Very happy with this choice
Obviously it's not cheap... but when you see the box and especially its contents, you understand! Very quiet power supply with a very complete set of connectors, including fasteners to have something very clean. I'm very happy with this product.
The package is very well packaged and the delivery is fast.
I have to say that I am very pleased with the quality of the power supply, but it is not the first time that I have seen this problem with seasonic power supplies, the power supply has start-up problems... which makes it unusable. I am not losing hope that ldlc will replace it or I will buy a new one because it is still a nice product.
Top of the range power supply nothing to say cble and accessory super well finished and good manufacture I highly recommend it
I bought three Seasonic power supplies at the same time: this Prime GX-650, a Prime GX850 (returned to LDLC for suspicious noise) and a Prime fanless TX-700. Yes, quieter than the fanless. In fact, the fan is practically unheard, in addition to the fact that it is completely off below 260W, i.e. in a typical configuration when the graphics card is at rest. It is so unheard that it is the coil whine that is heard the most, especially under full load (about 450W in the case of my configuration). My conclusion is that the quality control is the same for all the power supplies in this Prime range (the operating noise depends, if I understand correctly, to a large extent on the quality of the winding of various components such as the transformer), and that there is no point in buying a particularly expensive product. This product has an excellent price/performance ratio.
I've had several fairly large coil whines just by plugging in the power supply, while the switch is still on "off", and of course when you turn on the computer, it doesn't get any better. I'm not sure what to do about it. I'm not sure what to do with it, but I'm sure it's a good idea to have a look at it. I'm not sure if this is a good idea or not, but I'm sure it's a good idea.
I am a first time gamer and I chose this power supply because a colleague had recommended it to me and I am not disappointed. It is super quiet, high performance and does not heat up.
Very good quality, nothing to say,
and the LDLC delivery as usual RAS
I'm sure you'll find it very good.
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