Part Analysis
| General Data | |
| Manufacturer (OEM) | HKC |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | 1x NTC Thermistor 5D-15 (5 Ohm @ 25°C) & Relay |
| Bridge Rectifier(s) |
2x
|
| APFC MOSFETs |
2x WayOn WML36N60F2 (650V, 20A @ 100°C, Rds(on): 0.11Ohm)
|
| APFC Boost Diode |
1x P3D0601012
|
| Bulk Cap(s) |
2x Rubycon (420V, 390uF each or 780uF combined, 3000h @ 105°C, MXK)
|
| Main Switchers |
4x Ncepower NCE65TF130F (650V, 18A @ 100°C, Rds(on): 0.13Ohm)
|
| APFC Controller |
Champion CH6502UHHX
|
| Resonant Controller | Champion CU6901VPA |
| Topology |
Primary side: APFC, Full-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 8x |
| 5V & 3.3V | DC-DC Converters: 2x PWM Controller(s): ANPEC APW7159C |
| Filtering Capacitors | Electrolytic: 5x Nippon Chemi-Con (2-5,000 @ 105°C, KZE) 2x Nippon Chemi-Con (4-10,000 @ 105°C, KYA) Polymer: 35x |
| Supervisor IC | Weltrend WT7527RA |
| Fan Model | TT-1225 BDK12025MS (120mm, 12V, 0.30A, Fluid Dynamic Bearing Fan) |
| 5VSB Circuit | |
| Rectifier |
PJ1256
|
| Standby PWM Controller | PN8141 |
The platform differs from the GF A3 850W unit, which is by the same OEM. The heatsinks are pretty large, helping the fan speed profile to be more relaxed without jeopardizing the PSU’s reliability. The space between parts is restricted, especially on the secondary side, affecting airflow. Some caps on the secondary side are hidden below the 12V heatsink, so they don’t have a clear path to the fan’s airflow, but they are polymers which are more tolerant to high temperatures.
The build quality is good. HKC used quality capacitors everywhere, including the secondary side where stress is higher. The soldering quality is good, but the PCB’s coating is not the best I have seen by HKC. The cooling fan is by BaoDiKai, and its model number is BDK12025MS. It is supposed to use a fluid dynamic bearing, but I cannot be sure unless I destroy the fan to inspect its bearing. I would highly prefer a Hong Hua fan, but apparently, HKC doesn’t have close relations with this factory, so they either cannot get Hong Hua’s products or the prices are too high.
A full-bridge topology and an LLC resonant converter are used on the primary side. A synchronous rectification scheme is utilized on the secondary side for the 12V rail, along with a pair of DC-DC converters for the minor rails. Eight FETs are used for the 12V rail, which I couldn’t identify without major desoldering. On the primary side, HKC went with Ncepower FETs, which are not at the same quality level as the corresponding Infineon ones.
How can I make the EPS cable problem safe? Can I only use one of the connectors? Can I order a single cable from Thermaltake?
I’m wondering if this is the same unit as “PS-TPD-850FNFAPE-3”, as sold by Scan UK here: https://www.scan.co.uk/products/750w-thermaltake-toughpower-pf3-native-pcie-5-fully-modular-80plus-platinum-single-rail-708a-120mm-f
It’s only £130 in the UK at the moment and seems like a good deal. Thanks – Nick
Yes, it looks to be the same unit.
How serious “problem” is the single cable for the 2 eps connectors? Do you think that the combination of a 7700x (or 7950x) and an asrock x670e steel legend would set this on fire? (No overcloking, only standard operation voltages. If it is an actual problem, then the next candidate is the rmx850 shift, are they equal? they seem so)
In a single 12V rail it actually is. When both connectors can deliver more than 450W and take from a single PSU socket, all hell can break lose if something goes wrong.
hm, I see
I’m also building a 7700X system and want this PSU. I’m sure only one 8-pin EPS connector is needed to power the 7700X, so Vman & I shouldn’t need to worry, right?
I should have said in my previous comment, that I base my opinion on this: “Both the 7700X and 7600X use less than half the wattage a single eps can provide” from https://www.techpowerup.com/forums/threads/ryzen-zen4-are-both-cpu-power-plugs-required-now.299330/
Hello, I am now faced with choosing a power supply. I’ve been looking at your tests for a long time because I’m interested in it, but I want to choose a certain unit for my computer. Previously, I had a Bitfenix Whisper M 750W, but unfortunately its fan failed and I had to send the power supply back under warranty and received a refund.
I’m aiming for 750w/850w,
I care about low ripple, Japanese capacitors, quiet fan operation and two wires on a single pcie cable to the GPU (I have rtx 2070).
I don’t know whether to go with old units or ATX 3.0.
My unit under full load (prime95 + furmark) consumes 400W from the socket.
I have a maximum of EUR 140 to spend, I live in the EU.
Can you recommend something to me?
I would say go for an ATX v3.x unit to be future proof. Take a look at my best ATX v3.x PSUs in the 750W category, which ones fells into your budget.
Thanks for the answer. You’re doing an amazing job. I think I’ll go with the RM750x/850x shift.
Will there be a review of XPG Core Reactor II? I see it in the table, but there is no separate article.
I’m still considering Deepcool PX850G and XPG Core Reactor II 850W. They are available in my country at an affordable price. Which one will be the best idea?
Hi Benek, you bought the XPG Core Reactor II 850W? I’m considering buy it and I want opinions!