Part Analysis
| General Data | |
| Manufacturer (OEM) | CWT |
| Platform | CTT |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | 2x NTC Thermistor SCK-0510 (5Ω @ 25°C) & Relay |
| Bridge Rectifier(s) |
2x WeEn WNR2560M
|
| APFC MOSFETs |
2x Infineon IPP60R060P7 (650V, 30A @ 100°C, Rds(on): 0.06Ohm) &
2x Infineon IPB60R045P7 (650V, 38A @ 100°C, Rds(on): 0.045Ohm) |
| APFC Boost Diode |
2x Vishay C10ET07T (650V, 10A @ 125°C)
|
| Bulk Cap(s) |
3x Nippon Chemi-Con (420V, 820uF each or 2460uF combined, 2000h @ 105°C, KHE)
|
| Main Switchers |
4x Alpha & Omega AOTF29S50 (500V, 18A @ 100°C, Rds(on): 0.4Ohm)
|
|
IC Driver |
2x Novosense NSi6602 |
|
Digital Controller |
2x Texas Instruments UCD3138A |
| Topology |
Primary side: Semi-Digital, Interleaved PFC, Full-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 16x OnSemi NTMFS5C612N (60V, 168A @ 100°C, Rds(on): 1.5mOhm) |
| 5V & 3.3V | DC-DC Converters: 2x QM3054M6 (30V, 61A @ 100°C, Rds(on): 4.8mOhm) & 2x QN3107M6N (30V, 74A @ 100°C, Rds(on): 2.6mOhm) PWM Controller(s): uP3861P |
| Filtering Capacitors | Electrolytic: Nippon Chemi-Con (4-10,000 @ 105°C, KY), 4x Nippon Chemi-Con (W) 4x Rubycon (3-6,000 @ 105°C, YXJ),Polymer: 7x FPCAPS, 40x Nippon Chemi-Con |
| Supervisor IC | IN1S3151 – SAG |
| Fan Model | Sunon (MFE0251VX-1Q010-S99) (140mm , 12V, Magnetic Levitation Bearing) |
| 5VSB | |
| Rectifier |
1x PS1045L (45V, 10A) SBR
|
| Standby PWM Controller | On-Bright OB2365T |
The PSU uses CWT’s CTT semi-digital platform. I have encountered this platform several times so far, with the two most recent PSUs being the XPG Cybercore II 1300 and the MSI MEG Ai1000P PCIe5. The MSI MEG Ai1300P PCIe5 also uses it. This might not be a fully digital platform since some of its circuits use analog controllers, with only the APFC, main FETs, and 12V FETs controlled by MCUs. Still, this platform has potential and, through careful tuning, can achieve sky-high performance.
The build quality is high, with Japanese caps, quality FETs, and a top-notch Sunon fan using magnetic levitation bearing, which is highly tolerable to increased temperatures. At the same time, it doesn’t have the annoying bearing noise of a double ball bearing at low speeds. Two MCUs by Texas Instrument handle the PSU’s vital functions, leaving only the minor rails and 5VSB handled by analog controllers. If the rails mentioned above were digitally controlled, too, we would talk about a fully digital PSU and not a semi-digital one. So far, I haven’t encountered a fully digital PSU, and I am not sure when this will be the case since the technology in power supplies moves at an extremely slow pace compared to other PC parts, like CPUs and GPUs.
The soldering quality is not the best I have seen by CWT, which used large, enhanced PCB traces and copper pieces to lower energy losses. I have also noticed six shunt resistors on the PSU’s secondary side, which provide current information on the digital controllers required for the unit’s protection features, among others. The cable leaving from the PCB holding the AC receptacle and the first part of the EMI filter used to transfer a signal to a vertical board used by the 5VSB circuit doesn’t look like the most elegant solution, but it is an afterthought. This signal should pass through the PCB, but changing the platform’s design would be costly, and this small change didn’t justify it.
Excellent review , order the C1500 for my system , Amazon UK ,free shipping 40 dollars saved, for a final bill of 285 dollars !!
Great site though, thank you.
For the love of God, please lose the ad at the bottom of the page! It drives me INSANE and no other site I visit has it. Thank you.
Can you send me a screenshot? Also, we need ads to survive!
It’s not the ad itself, but it’s position on the page. The ads either side of your content are not distracting, but the space at the bottom of the page containing the ad that can be hidden, is a constant distraction and a pain in the arse! Anyway, maybe it’s just me.
NZXT C1500 vs Be Quiet! Pro 13 1600W? For future proof (Nvidia RTX 5XXX), less risk with connectors melting and overall performance?
Thanks a lot!
NZXT C1500 ATX v3.1 vs Seasonic PRIME PX-1600 ?
PX-1600
At £150 more for the Seasonic from Scan in the UK!
I just bought the NZXT C1500 based on your excellent review, currently using a Seasonic TX1000. Only upgraded in anticipation of upgrading to a Nvidia 5090. Thanks so much for your content Aris.
MEG Ai1300P vs. C1500
I will buy one of them and really need your opinion on this versus. I’ll be so glad if you reply this one.
Thanks.
C1500
So, I picked C1500 today. Thanks so much again!
Thanks for the thorough review. Maybe I missed it, but I didn’t see any EMI testing. Did you look at that?
I bought this one to replace my old Corsair RM1000X, but the +12v Rail reports to be 11.904 in BIOS and in Windows it’s between 11.904/11.808; More like 11.808 than 11.904 that is. The PCIe +12v Rails report around v12.060 with v11.883 under load. I wonder whether this is an issue with the power supply or some other component that could be giving me issues. Should I return the PSU?
Do not pay attention to what the mainboard’s sensors say, they are not accurate, at all.
I don’t understand one thing, why this C1500 platform called CTT has the same nomenclature as the platform mounted on XPG Cybercore II 1300 and MSI MEG Ai1000P PCIe5.
They are so different, starting from the double transformer of the 12v, passing through the number of capacitors on the primary, the different dc to dc stage, the different position of many components, the output connectors with only solid state capacitors for c1500 while there are electrolytic ones for the other two. On the other hand the CST platform of the Dark Power Pro 13 1600W is much more similar to the CTT.
the platform has several changes, requested by NZXT as I remember.
Thi is really a great PSU, CWT is always synonymous with trust and quality.
I saw on their site that they produce a 2000w psu with the acronym CTT, atx 3.1 pcie 5.1, 80+TITANIUM, with only one 12V-2×6 connector but there is no review or internal photo to see if the platform is further updated.
Can I say that the C1500 has a superior performance compared to the TF11550?
Yes
Hi,
Just a quick one, those Sunon Maglev fans, do they not have an issue operating vertically- as I read this somewhere.
Thanks
No they are just fine.