Part Analysis
| General Data | |
| Manufacturer (OEM) | FSP |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | 1x NTC Thermistor SCK-056 (5 Ohm) & Relay |
| Bridge Rectifier(s) |
2x GBU1506 (600V, 15A @ 100°C)
|
| APFC MOSFETs |
2x GP36S60YERD
|
| APFC Boost Diode |
1x Toshiba TRS8E65F (650V, 8A, @ 175°C)
|
| Bulk Cap(s) |
1x Nippon Chemi-con (450V, 680uF, 3,000h @ 105°C, KHS)
|
| Main Switchers |
2x Toshiba TK25A60X5 (600V, 25A, @ 150°C, Rds(on): 0.14Ohm)
|
| APFC Controller | Champion CM6500UNX |
| Resonant Controller | Champion CU6901VPA |
| Topology |
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 6x CYStek MTB1D6NO4RH8 (40V, 84A @ 100°C, Rds(on): 1.8mOhm) |
| 5V & 3.3V | DC-DC Converters: 4x XSEMI XP3R303GMT-L (30V, 25A @ 70°C, Rds(on): 3.3mOhm) PWM Controller(s): UPI uP3861P |
| Filtering Capacitors | Electrolytic: 4x Nippon Chemi-Con (105°C, W) 2x Nippon Chemi-Con (1-5,000h @ 105°C, KZE), 2x Nippon Chemi-Con (5-6,000h @ 105°C, ZKH) Polymer: 4x Nippon Chemi-Con, 2x Apaq, 26x |
| Supervisor IC | IN1T703I-SDG |
| Fan Model | Yate Loon D12SH-12 (120mm, 12V, 0.30A, Rifle Bearing Fan) |
| 5VSB Circuit | |
| TVS Diode | 1x SMAJ15A |
| High Side Rectifier | US1MGR (1000V, 1A) |
| Standby PWM Controller | Grenery GR9230UK |
The design looks clean and neat, with several electrolytic caps on the secondary side, which have unobstructed airflow. The heat sinks are not large, especially on the secondary side, where the 12V FETs are on the PCB’s solder side. The soldering quality is good in this unit. The parts that FSP used are of high quality except for the fan, which is terrible. The FETs regulating the 12V rail are also by a lesser-known manufacturer, but they didn’t create any issues during testing under harsh conditions.
The unit’s design is contemporary, with a half-bridge topology on the primary side and an LLC resonant converter for lossless switching. Six CYStek FETs handle the 12V rail on the secondary side, and a pair of PWM controllers generate the minor rails. Instead of an ANPEC PWM controller on the VRMs, we find one from UPI.
Just got this unit with Toshin Kogyo LGWA 450v 680uF. It whines decently loud when i do the psu turn on test without a load. Might be a heads up for anyone which are sensitive to these whining sound.
I let it turn on for few minutes with the included jumper, nothing explodes so its non-issue for the most part.
Without load it works in burst mode which can cause such issues. Most modern PSUs have this problem I am afraid and it also has with the rest system parts.
I see. Thanks for the insight. I have one more question, how important is TVS diode on the 5VSB circuit? Most psu doesnt have it, only this VITA GM line and Nzxt c1200 (which im aware of). Or does the MOV already took care most of the input transients?
Hi,
I noticed that this unit has only 2 PCIE 8-pin slots. Is there a recommended configuration (pigtail) for a 3x8pin GPU?
Thank you
You just use both; you cannot do other wise. Or you move to a PSU offering 3x dedicated PCIe cables
Why did you mention fan being terrible yet according to noise levels its on the top of the list having lower dBA than some more premium units such as Corsair Shift. Also considering the PSU has 10 year warranty I’m sure they will replace it multiple times if it happens to die often, after 10 years well it’s time to replace PSU altogether anyway.
I don’t like its manufacturer.
Bought this psu after reading this review. My only concern is that my unit have coil whine when on idle from time to time.
Check if the coil whine is from the PSU or other parts in your system. It also has to do with the situation, for example in some game menus where FPS are unlimited, it is natural to have coil whine (from the GPU)
What about compare to hydro g pro series? Is there significant difference in term of quality and performance?
Hi, between FSP Vita 850w and XPG Core Reactor II 850W which one would you recommend?
The XPG is about $15 – $17 cheaper here
They have similar overall performance so I would get the one that is more affordable.
What about compared to Superflower Leadex vii Gold? It’s also about $17 – $20 more than XPG
Leadex is very good.
It’s now sold out everywhere in my region, alternative would be NZXT C850 for 230v? NZXT is $10 more than the XPG or the XPG might still be better choice?
I just got this PSU and am experiencing quite a bit of coil whine. Is this something you’ve had while performing your testing?
Thinking of either replacing my set or just living with it.
Nope if there are any coil whine issues, I mention them in the review. You should probably replace it.