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, 1x Syncpower SP687 (Discharge IC) |
| Inrush Protection | NTC Thermistor & Relay |
| Bridge Rectifier(s) |
1x GBU3010 (1000V, 30A @ 90°C)
|
| APFC MOSFETs |
2x Lonten LSD65R099GF (650V, 26A @ 100°C, Rds(on): 0.099Ohm) &
CM03AX (reduce the no-load consumption) |
| APFC Boost Diode |
1x
|
| Bulk Cap(s) |
1x Nippon Chemi-Con (420V, 730uF, 2,000h @ 105°C, KHE)
|
| Main Switchers |
2x NCE Power NCE65T130F (650V, 18A @ 100°C, Rds(on): 0.13Ohm)
|
| APFC Controller |
Champion CM6500UNX
|
| Resonant Controller | Champion CM6901VAC |
| Topology |
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 6x Infineon ISC012N04LM6 (40V, 168A @ 100°C, Rds(on): 1.2mOhm) |
| 5V & 3.3V | DC-DC Converters: 4x Infineon Infineon ISC012N04LM6 (40V, 168A @ 100°C, Rds(on): 1.2mOhm) PWM Controller(s): ANPEC APW7159C |
| Driver IC | Chipown PN7762 |
| Filtering Capacitors | Electrolytic: 1x Nippon Chemi-Con (4-10,000h @ 105°C, KY), 2x Nippon Chemi-Con (4-10,000h @ 105°C, KYA), 1x Rubycon (2-10,000h @ 105°C, YXF) Polymer: 5x Nippon Chemi-Con, 28x NIC |
| Supervisor IC | IN1S915I-SAG |
| Fan Model | Thermaltake TT-0925 (AV-F9215HS) (92mm, 12V, 0.25A, Fluid Dynamic Bearing Fan) |
| 5VSB Circuit | |
| Rectifiers |
1x SB1045L SBR (45V, 10A)
|
| Standby PWM Controller | On-Bright OB2365 |
Although this PSU looks identical to Cooler Master’s similar SFX offer, which Gospower makes, it is by HKC. It seems the latter made a similar design to the Gospower SFX models. We have a half-bridge topology and an LLC resonant converter on the primary side. The secondary side employs a synchronous design for rectifying the 12V rail and a pair of DC-DC converters for the minor rails.
The primary heatsink is large, and there are no heatsinks on the secondary side since all 12V FETs are installed on the solder side of the PCB. The soldering quality is generally good but not among the best I have seen. Moreover, quality parts, including Japanese caps and an FDB fan, are used.
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I also bought myself a Thermaltake Toughpower SFX 850W Gold PSU for my Fractal Terra build. I had this Corsair SF850L 850W from a previous build, but I thought I would go smaller, so as to put a 120 mm fan. Boy do I regret. The Thermaltake sounds like it has a canary locked inside, making a chirping noise, almos continuous, you can hear 7 meters away. Considering the price, this is outrageous. Thinking about going back to my Corsair, who’s fas was anyway idle most of the time…
How you install it? With the fan facing downwards? Also, Cybenetics Standard+ rating is not what I call silent. The average noise output of 35-40 dBA is notable.
I have the same problem with the fan 🙁
Exactly the same thing happens to me, the screeching noise that this source emits is unbearable, with the money it is worth and this huge failure.
Great review with alot of detail thanks guys, I’ve read alot of forums and seen videos of numerous people complaining about the Thermaltake SFX850 having loud coil wine at lighter loads (about where the fan just about starts spinning due to load). Was this noticed during the testing of your unit?
we didn’t notice something, else we would have wrote about it, but it can happen yes, with different production batches. By testing 1-2 PSUs only, you can’t have a complete picture about the whole production, sorry.
Mine has a horrid whine when the fan can’t decide wether it wants to spin or not. This doesn’t seem to be an uncommon issue either which is annoying. So far warranty support has been unhelpful.
I am sorry to hear this. Will try to contact TT and learn more about this.