Protection Features
| OCP (Normal @ 27.4°C) | 12V: 98.60A (140.86%), 11.994V 5V: 27.7A (138.50%), 4.999V 3.3V: 29.3A (146.50%), 3.312V 5VSB: 6.7A (223.33%), 4.766V |
| OCP (Hot @ 44.6°C) | 12V: 92.20A (131.71%), 12.017V 5V: 27.7A (138.50%), 5.003V 3.3V: 29.4A (147.00%), 3.314V 5VSB: 6.5A (216.67%), 4.753V |
| OPP (Normal @ 27.6°C) | 1183.091W (139.19%) |
| OPP (Hot @ 41.6°C) | 1055.558W (124.18%) |
| OTP | ✓ (138°C @ Heat Sink) |
| SCP | 12V to Earth: ✓ 5V to Earth: ✓ 3.3V to Earth: ✓ 5VSB to Earth: ✓ -12V to Earth: ✓ |
| PWR_OK | Proper Operation |
| NLO | ✓ |
| Fan Failure Protection | ✗ |
| SIP | Surge: MOV Inrush: NTC & Bypass Relay |
The 12V OCP triggering point is close to 141% in cold conditions but drops notably at high temperatures. On the other hand, the OCP triggering points on the minor rails are high at normal temperatures and remain at the same levels at high temperatures, affecting the effectiveness of the corresponding protection features. The PSU is stressed more at high temperatures, so it should be tuned to deliver less power than at lower temperatures.
The Over Power Protection is set pretty high at normal temperatures but drops significantly at high temperatures to protect the PSU effectively. All other primary protection features are present, but Fan Failure Protection should be implemented, especially since an MCU controls the fan.
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Got this PSU the other day, first seasonic PSU purchase and will be the last. The fan noise is absolutely insane under light load gaming. Just ordered a be quiet power zone 2 850w hopefully this will be better.
“The fan is digitally controlled by an MCU, which is optimal, but you still have to program it accordingly to have a good fan speed profile. Moreover, I would like to see MCUs controlling other parts of the PSU as well.”
could you please elaborate this a bit more? How do I program it and change fan curve since it is really unacceptable! Way too loud and starts as soon as GPU goes over 120W….. While at the same time I can hammer my CPU with 1h of Cinebench at 120W with all RGB and 7 fans, 30+ active tabs in Edge etc. BUT as soon as you start anything that uses GPU it goes nuclear LOL. Otherwise good PSU and cables are great for my ITX build. I might just replace fan with bequiet! one and then it can spin as much as it wants LOL…
Bad fan profile settings. Initial fan speed is too high, 940 rpm is loud. It was better before.
I can confirm the fan in GX-850 V4 is way too loud (I have the PSU here). Indeed it starts spinning at too high RPM. The fan curve is absolutely terrible. Even at 360 Watts load during gaming the PSU fan in the GX-850 V4 is by far the loudest component in my PC. I compared the GX-850 V4 ATX PSU against my Seasonic Focus SPX 2021 SPX-750 750W SFX PSU with a 92 mm fan (vs 135 mm fan inside the GX-850 V4) and the small SFX PSU is significantly more quiet, it is almost inaudible below 400 Watts load. The small SPX-750 is absolutely compatible with Silent PC bulds, while the GX-850 V4 is absolutely unacceptable for Silent PC builds. Also the fan curve for the GX-850 V4 is absolutely trash. After closing a video game and going from around 400 Watts down to 80 Watts idle- it takes the fan like 2-3 minutes to stop spinning meanwhile the 92mm fan inside the small SPX-750 SFX psu stops spinning after like 10-15 seconds when closing the game and going from high load back to idle. I suspect it is the “new Seasonic OptiSink Design” that requires much more cooling. While it might have a bigger surface area for cooling in total, it lacks actual physical mass of bigger metal cooling heatsinks. Because of that it needs constant and active cooling compared to solutions with big aluminium heatsinks. All the marketing talk seems to be a bunch of bull, Quote:
“The eightfold increase in heat dissipation keeps the internals of the power supply cooler, eventually leading to improved product quality, long-term reliability, and more efficient operation.
The redesigned layout of the power supply components and its improved thermal performance creates versatility and allows the power supply to be safely installed in any orientation.
The OptiSink design is an eco-friendly solution that not only lowers the costs of material usage and production but also leads to energy savings in the long run.”
What it really means is- it is way cheaper for Seasonic to manufacture and because of that, they make more profit with the new OptiSink design. The downside is that it needs constant active air cooling due to lack of mass from big metal heatsinks, which are way more effective at cooling.
Needless to say I’ve returned the GX-850 V4, it’s absolutely terrible and unacceptable in terms of noise, I kid you not- the small SPX-750 is significantly more quiet. I made video comparisons as well, might upload them to YT later.
https://photo.coolenjoy.co.kr/data/editor/2407/13c9e3cc800d2e5e3c3cf5bafd2b5b87dcd6a2cb.jpg Aris i’ve seen this PSU and find this cybenetics QR on this PSU, did this MAXWELL Duke officialy tested by Cybenetics labs, how it’s perform ?
Nope, I don’t remember testing this unit! Basically I never heard of this brand before. Hmm, I will investigate this.
i’ve seen that the Maxwell Duke 1000W internals looks like 1stplayer NGDP 1000W https://photo.coolenjoy.co.kr/data/editor/2407/647933e3d3d50b746a68c7235da86ad64c5491bb.jpg this is your tearing down the ngdp 1000w https://hwbusters.com/wp-content/uploads/2023/09/top1-2.jpg
This new series is a disappointment