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Asus TUF Gaming 450W Bronze Power Supply Review


The Asus TUF Gaming 450W Bronze is a low-capacity and affordable PSU destined for systems with low energy demands. If fixed cables are not a big issue, you should include it in your buy list since it offers high-performance thanks to the modern platform that it uses. If the price is right at any given time, it can compete with the best PSUs, including the value-conscious XPG Pylon 450. 

The lowest member of the Asus TUF-Gaming line has 450W maximum power, so it is ideal for office PCs or download stations with low energy demands. From the moment, Corsair decided to substitute the CX line with the semi-modular CXM units, which use a less advanced but still competent platform, Asus is the only one offering Bronze efficiency (Silver in Cybenetics) PSUs, featuring a half-bridge topology and LLC resonant converters. Corsair dropped this platform because of the increased cost. Other major brands, including XPG and Thermaltake, also used older designs with some updates to achieve similar performance. 

Similar to the TUF 550, the TUF 450 is 80 PLUS Bronze and Cybenetics Silver certified in efficiency. In noise, it received a Cybenetics A- rating, which is satisfactory for a low-capacity PSU. Lastly, the TUF 450 has a compact enough footprint with 150mm depth, allowing the installation of a 135mm fan. Given the unit’s low capacity, the chassis could be smaller, but this wouldn’t allow for a larger than 120mm fan, impacting noise output. 

Specifications of Asus TUF Gaming 450W

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Manufacturer (OEM)Great Wall
Max. DC Output450W
Efficiency80 PLUS Bronze, Cybenetics Silver (85-87%)
NoiseCybenetics A- (25-30 dB[A])
Modular✗ (fixed)
Intel C6/C7 Power State Support
Operating Temperature (Continuous Full Load)0 – 40°C
Over Voltage Protection
Under Voltage Protection
Over Power Protection
Over Current (+12V) Protection
Over Temperature Protection
Short Circuit Protection
Surge Protection
Inrush Current Protection
Fan Failure Protection
No Load Operation
Cooling135mm Double Ball-Bearing Fan (CF1325H12D)
Semi-Passive Operation
Dimensions (W x H x D)150 x 85 x 150mm
Weight1.91 kg (4.21 lb)
Form FactorATX12V v2.53, EPS 2.92
Alternative Low Power Mode (ALPM) compatible
Warranty6 Years

Power Specifications of Asus TUF Gaming 450W

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RailRow 0 – Cell 1 3.3V5V12V5VSB-12V
Max. PowerAmps202037.430.8
Row 2 – Cell 0 WattsRow 2 – Cell 2 110448.8159.6
Total Max. Power (W)Row 3 – Cell 1 Row 3 – Cell 2 450Row 3 – Cell 4 Row 3 – Cell 5 Row 3 – Cell 6

Cables and Connectors for Asus TUF Gaming 450W

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Captive CablesRow 0 – Cell 1 Row 0 – Cell 2 Row 0 – Cell 3 Row 0 – Cell 4
DescriptionCable CountConnector Count (Total)GaugeIn Cable Capacitors
ATX connector 20+4 pin (600mm)1118-20AWGNo
4+4 pin EPS12V (820mm)1118AWGNo
6+2 pin PCIe (620mm+100mm)1218AWGNo
SATA (420mm+110mm+110mm)1318AWGNo
SATA (410mm+110mm)1218AWGNo
4-pin Molex (400mm+150mm+150mm+150mm)1418AWGNo
Modular CablesRow 8 – Cell 1 Row 8 – Cell 2 Row 8 – Cell 3 Row 8 – Cell 4
AC Power Cord (1390mm) – C13 coupler1118AWG

All cables are fixed. The good part is that they are long, especially the EPS cable. Moreover, the distance between the 4-pin Molex connectors is adequate at 150mm. Lastly, there are enough connectors for a 450W unit. 

Component Analysis of Asus TUF Gaming 450W

We strongly encourage you to have a look at our PSUs 101 article, which provides valuable information about PSUs and their operation, allowing you to better understand the components we’re about to discuss.

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General Data
Manufacturer (OEM)Great Wall
PCB TypeSingle Sided
Primary Side
Transient Filter4x Y caps, 2x X caps, 2x CM chokes, 1x MOV
Inrush ProtectionNTC Thermistor SCK-1R58 (1.5 Ohm)
Bridge Rectifier(s) 1x GBU1508 (800V, 15A @ 100°C)
APFC MOSFETs 1x Advanced Power AP30SL60WL (650V, 16.5A @ 100°C, Rds(on): 0.13Ohm)
APFC Boost Diode 1x STMicroelectronics STTH8S06FP (600V, 8A)
Bulk Cap(s) 1x Lelon (450V, 270uF, 2,000h @ 105°C, LSG)
Main Switchers 2x STMicroelectronics STF13NM60N (600V, 6.9A @ 100°C, Rds(on): 0.36Ohm)
APFC Controller Champion CM6500UNX & CM03AX
Resonant ControllerChampion CM6901X
Topology Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side
+12V MOSFETs2x STMicroelectronics STP100N6F7 (60V, 75A @ 100°C, Rds(on): 5.6mOhm)
5V & 3.3VDC-DC Converters
Filtering Capacitors

Electrolytic: 3x Elite (3-5,000h @ 105°C, EJ), 3x Teapo (1-3,000h @ 105°C, SC), 1x Teapo (1-2,000h @ 105°C, SZ), 1x Teapo (105°C, TB), 1x Teapo (105°C, TA)
Polymer: 4x Lelon, 2x no info

Supervisor ICIN1S429I – DCG
Fan ModelChampion CF1325H12D (135mm, 12V, 0.6A, Double Ball Bearing)
5VSB Circuit
Rectifier 1x SBR
Standby PWM ControllerPower Intergrations TNY278PN

This platform is too advanced for a mere Bronze unit, which is why it is more expensive. Great Wall, the OEM behind the TUF line, used a half-bridge topology and an LLC resonant controller. A configuration usually found in Gold and higher efficiency units, up to Titanium in some cases. The soldering quality is great, and to keep the cost down, GW used Elite and Teapo caps, which are the best alternative to Japanese caps. 

The transient/EMI filter has all require parts to get the job done. 

Asus TUF-Gaming 450

(Image credit: Tom’s Hardware)

The single bridge rectifier can handle up to 15A at 100°C.

The APFC converter uses two FETs and a single boost diode. The bulk cap is rated at 450V and 105°C, but its capacity is low, and to add insult to injury, it is by Lelon, a brand that doesn’t have a good name in this section. 

The primary switching FETs are two STMicroelectronics installed in a half-bridge topology. An LLC resonant converter is also used for increased efficiency. 

Two FETs regulate the 12V rail and a pair of DC-DC converters handle the minor rails. 

The electrolytic filtering caps are mostly by Elite and Teapo. In the 550W unit, we found several Lelon caps, which are inferior to similar-spec Teapo and Elite caps. 

The standby PWM controller is a TNY278PN IC. The rectifier on the secondary side of this circuit is an SBR. 

Asus TUF-Gaming 450

(Image credit: Tom’s Hardware)

The main supervisor IC is an IN1S429I – DCG. 

Soldering quality is good.

The cooling fan uses a double ball bearing. We usually find lower-quality fans in budget PSUs. 

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To learn more about our PSU tests and methodology, please check out How We Test Power Supply Units. 

Primary Rails And 5VSB Load Regulation

The following charts show the main rails’ voltage values recorded between a range of 40W up to the PSU’s maximum specified load, along with the deviation (in percent). Tight regulation is an important consideration every time we review a power supply because it facilitates constant voltage levels despite varying loads. Tight load regulation also, among other factors, improves the system’s stability, especially under overclocked conditions and, at the same time, it applies less stress to the DC-DC converters that many system components utilize.

Load regulation is tight on all rails. The PSU’s low capacity and the fixed cables, which have lower resistance than modular ones, help in this. 

Hold-Up Time

Put simply; hold-up time is the amount of time that the system can continue to run without shutting down or rebooting during a power interruption.

The hold-up time is short and the same applies to the power ok signal’s hold-up time. 

Inrush Current

Inrush current, or switch-on surge, refers to the maximum, instantaneous input current drawn by an electrical device when it is first turned on. A large enough inrush current can cause circuit breakers and fuses to trip. It can also damage switches, relays, and bridge rectifiers. As a result, the lower the inrush current of a PSU, right as it is turned on, the better.

Inrush currents are high. A higher resistance NTC thermistor is required. 

Leakage Current

In layman’s terms, leakage current is the unwanted transfer of energy from one circuit to another. In power supplies, it is the current flowing from the primary side to the ground or the chassis, which in the majority of cases is connected to the ground. For measuring leakage current, we use a GW Instek GPT-9904 electrical safety tester instrument.

The leakage current test is conducted at 110% of the DUT’s rated voltage input (so for a 230-240V device, we should conduct the test with 253-264V input). The maximum acceptable limit of a leakage current is 3.5 mA and it is defined by the IEC-60950-1 regulation, ensuring that the current is low and will not harm any person coming in contact with the power supply’s chassis.

Asus TUF-Gaming 450

(Image credit: Tom’s Hardware)

Leakage current is low. 

10-110% Load Tests

These tests reveal the PSU’s load regulation and efficiency levels under high ambient temperatures. They also show how the fan speed profile behaves under increased operating temperatures.

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Test12V5V3.3V5VSBDC/AC (Watts)EfficiencyFan Speed (RPM)PSU Noise (dB[A])Temps (In/Out)PF/AC Volts
10%1.946A1.941A1.974A0.984A45.00483.087%0<6.038.18°C0.943
Row 2 – Cell 0 12.027V5.151V3.344V5.082V54.167Row 2 – Cell 6 Row 2 – Cell 7 Row 2 – Cell 8 34.12°C114.92V
20%4.918A2.913A2.962A1.182A90.00987.121%0<6.038.93°C0.973
Row 4 – Cell 0 12.017V5.15V3.342V5.076V103.315Row 4 – Cell 6 Row 4 – Cell 7 Row 4 – Cell 8 34.63°C114.92V
30%8.235A3.398A3.457A1.381A134.93988.157%0<6.039.91°C0.983
Row 6 – Cell 0 12.008V5.15V3.341V5.071V153.067Row 6 – Cell 6 Row 6 – Cell 7 Row 6 – Cell 8 35.17°C114.89V
40%11.569A3.888A3.956A1.579A180.02387.466%111326.335.49°C0.987
Row 8 – Cell 0 11.999V5.144V3.337V5.066V205.822Row 8 – Cell 6 Row 8 – Cell 7 Row 8 – Cell 8 40.51°C114.88V
50%14.558A4.864A4.949A1.778A225.0287.427%112526.636.23°C0.989
Row 10 – Cell 0 11.987V5.14V3.334V5.062V257.377Row 10 – Cell 6 Row 10 – Cell 7 Row 10 – Cell 8 41.73°C114.88V
60%17.551A5.839A5.944A1.978A270.01987.002%118928.436.68°C0.991
Row 12 – Cell 0 11.978V5.138V3.332V5.056V310.359Row 12 – Cell 6 Row 12 – Cell 7 Row 12 – Cell 8 42.76°C114.86V
70%20.548A6.815A6.939A2.179A315.01986.288%127830.537.05°C0.992
Row 14 – Cell 0 11.967V5.137V3.33V5.05V365.08Row 14 – Cell 6 Row 14 – Cell 7 Row 14 – Cell 8 44.14°C114.85V
80%23.598A7.793A7.934A2.279A360.08185.54%140333.338.09°C0.993
Row 16 – Cell 0 11.957V5.135V3.327V5.047V420.95Row 16 – Cell 6 Row 16 – Cell 7 Row 16 – Cell 8 46.17°C114.84V
90%26.996A8.28A8.419A2.38A405.06784.741%154135.838.89°C0.993
Row 18 – Cell 0 11.948V5.134V3.325V5.043V478.011Row 18 – Cell 6 Row 18 – Cell 7 Row 18 – Cell 8 47.94°C114.81V
100%30.169A8.769A8.936A2.982A449.90883.779%166738.140.5°C0.994
Row 20 – Cell 0 11.939V5.133V3.324V5.032V537.019Row 20 – Cell 6 Row 20 – Cell 7 Row 20 – Cell 8 50.53°C114.81V
110%33.215A9.745A10.024A2.983A494.52582.655%178439.941.87°C0.994
Row 22 – Cell 0 11.929V5.133V3.322V5.029V598.298Row 22 – Cell 6 Row 22 – Cell 7 Row 22 – Cell 8 52.83°C114.79V
CL10.117A12.866A13.088A0A111.31882.505%0<6.044.91°C0.98
Row 24 – Cell 0 12.000V5.147V3.339V5.079V134.926Row 24 – Cell 6 Row 24 – Cell 7 Row 24 – Cell 8 39.42°C114.89V
CL20.116A19.419A0A0A101.42381.034%0<6.045.94°C0.979
Row 26 – Cell 0 12.016V5.151V3.345V5.083V125.161Row 26 – Cell 6 Row 26 – Cell 7 Row 26 – Cell 8 38.65°C114.9V
CL30.116A0A19.773A0A67.38476.765%0<6.046.99°C0.969
Row 28 – Cell 0 12.012V5.168V3.337V5.076V87.779Row 28 – Cell 6 Row 28 – Cell 7 Row 28 – Cell 8 37.94°C114.9V
CL437.597A0A0A0.001A449.67284.823%172438.941.19°C0.994
Row 30 – Cell 0 11.960V5.152V3.332V5.075V530.135Row 30 – Cell 6 Row 30 – Cell 7 Row 30 – Cell 8 52.16°C114.82V

The PSU doesn’t have a problem delivering 110% of its maximum power at 42°C. This doesn’t mean that you should push it so hard, though. 

20-80W Load Tests

In the following tests, we measure the PSU’s efficiency at loads significantly lower than 10% of its maximum capacity (the lowest load the 80 PLUS standard measures). This is important for representing when a PC is idle with power-saving features turned on.

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Test12V5V3.3V5VSBDC/AC (Watts)EfficiencyFan Speed (RPM)PSU Noise (dB[A])Temps (In/Out)PF/AC Volts
20W1.236A0.486A0.493A0.196A19.99876.013%0<6.034.51°C0.86
Row 2 – Cell 0 12.019V5.149V3.344V5.096V26.308Row 2 – Cell 6 Row 2 – Cell 7 Row 2 – Cell 8 31.46°C114.94V
40W2.718A0.68A0.691A0.295A4083.598%0<6.035.26°C0.934
Row 4 – Cell 0 12.027V5.15V3.344V5.093V47.848Row 4 – Cell 6 Row 4 – Cell 7 Row 4 – Cell 8 31.93°C114.94V
60W4.202A0.874A0.888A0.393A6086.329%0<6.035.84°C0.958
Row 6 – Cell 0 12.024V5.15V3.344V5.091V69.501Row 6 – Cell 6 Row 6 – Cell 7 Row 6 – Cell 8 32.06°C114.92V
80W5.684A1.068A1.086A0.491A79.95387.689%0<6.037.59°C0.969
Row 8 – Cell 0 12.021V5.15V3.343V5.088V91.175Row 8 – Cell 6 Row 8 – Cell 7 Row 8 – Cell 8 33.61°C114.92V

The fan doesn’t spin at light loads. 

2% or 10W Load Test

From July 2022, the ATX spec requires 70% and higher efficiency with 115V input. The applied load is only 10W for PSUs with 500W and lower capacities, while for stronger units, we dial 2% of their max-rated capacity.

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12V5V3.3V5VSBDC/AC (Watts)EfficiencyFan Speed (RPM)PSU Noise (dB[A])Temps (In/Out)PF/AC Volts
0.552A0.5A0.15A0.1A10.21364.499%0<6.025.49°C0.756
Row 2 – Cell 0 12.019V5.143V3.342V5.1V15.833Row 2 – Cell 6 Row 2 – Cell 7 24.36°C114.92V

The 60% mark is passed with a 2 % load. 

Efficiency & Power Factor

Next, we plotted a chart showing the PSU’s efficiency at low loads and loads from 10 to 110% of its maximum rated capacity. The higher a PSU’s efficiency, the less energy goes wasted, leading to a reduced carbon footprint and lower electricity bills. The same goes for Power Factor.

The platform is efficient, leading the charts in all load regions. 

5VSB Efficiency

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Test #5VSBDC/AC (Watts)EfficiencyPF/AC Volts
10.1A0.511W72.813%0.064
Row 2 – Cell 0 5.112V0.702WRow 2 – Cell 3 114.87V
20.25A1.277W77.809%0.14
Row 4 – Cell 0 5.11V1.641WRow 4 – Cell 3 114.88V
30.55A2.807W79.824%0.246
Row 6 – Cell 0 5.106V3.517WRow 6 – Cell 3 114.88V
41A5.098W80.257%0.325
Row 8 – Cell 0 5.099V6.353WRow 8 – Cell 3 114.88V
51.5A7.637W78.897%0.373
Row 10 – Cell 0 5.092V9.679WRow 10 – Cell 3 114.88V
62.999A15.19W77.812%0.433
Row 12 – Cell 0 5.065V19.523WRow 12 – Cell 3 114.87V

The 5VSB rail achieves high enough efficiency. 

Power Consumption In Idle And Standby

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Mode12V5V3.3V5VSBWattsPF/AC Volts
Idle12.060V5.104V3.327V5.115V6.0710.45
Row 2 – Cell 0 Row 2 – Cell 1 Row 2 – Cell 2 Row 2 – Cell 3 Row 2 – Cell 4 Row 2 – Cell 5 114.84V
StandbyRow 3 – Cell 1 Row 3 – Cell 2 Row 3 – Cell 3 Row 3 – Cell 4 0.0540.006
Row 4 – Cell 0 Row 4 – Cell 1 Row 4 – Cell 2 Row 4 – Cell 3 Row 4 – Cell 4 Row 4 – Cell 5 114.84V

Vampire power is low with 115V input, but we would like to see below 0.1W with 230V input. 

Fan RPM, Delta Temperature, And Output Noise

All results are obtained between an ambient temperature of 37 to 47 degrees Celsius (98.6 to 116.6 degrees Fahrenheit).

(Image credit: Tom’s Hardware)

(Image credit: Tom’s Hardware)

The fan speed profile is not aggressive, even under harsh operating conditions. 

The following results were obtained at 30 to 32 degrees Celsius (86 to 89.6 degrees Fahrenheit) ambient temperature.       

(Image credit: Tom’s Hardware)

(Image credit: Tom’s Hardware)

At normal operating temperatures, close to 30 degrees Celsius, the PSU’s semi-passive operation won’t last long if you push hard the minor rails. From 150W to 310W, the fan’s noise is within 25-30 dBA, and the 30 dBA mark is passed at higher loads. In no case, noise exceeds 35 dBA under normal operating temperatures. 

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Protection Features

Check out our PSUs 101 article to learn more about PSU protection features.

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OCP (Cold @ 21°C)12V: 50.6A (135.29%), 11.919V
5V: 35A (175%), 5.125V
3.3V: 35A (175%), 3.324V
5VSB: 4.8A (160%), 5.024V
OCP (Hot @ 39°C)12V: 50.4A (134.76%), 11.929V
5V: 35A (175%), 5.129V
3.3V: 35A (175%), 3.330V
5VSB: 4.7A (156.67%), 5.017V
OPP (Cold @ 26°C)591.51W (131.45%)
OPP (Hot @ 38°C)591.63W (131.47%)
OTP✓ (115°C @ 12V Heat Sink)
SCP12V to Earth: ✓
5V to Earth: ✓
3.3V to Earth: ✓
5VSB to Earth: ✓
-12V to Earth: ✓
PWR_OKAccurate but lower than 16.0ms
NLO
SIPSurge: MOV
Inrush: NTC Thermistor

The OCP triggering point is correctly set at 12V, and the same applies to over power protection. On the contrary, OCP on the minor rails is set too high. Lastly, there is over temperature protection, and the power ok signal might be lower than 16ms, the lowest threshold that the ATX spec requires, but it is accurate, at least. 

DC Power Sequencing

According to Intel’s most recent Power Supply Design Guide (revision 1.4), the +12V and 5V outputs must be equal to or greater than the 3.3V rail at all times. Unfortunately, Intel doesn’t mention why it is so important to always keep the 3.3V rail’s voltage lower than the levels of the other two outputs.

No problems here since the 3.3V rail is always lower than the other two. 

Cross Load Tests

To generate the following charts, we set our loaders to auto mode through custom-made software before trying more than 25,000 possible load combinations with the +12V, 5V, and 3.3V rails. The deviations in each of the charts below are calculated by taking the nominal values of the rails (12V, 5V, and 3.3V) as point zero. The ambient temperature during testing was between 30 to 32 degrees Celsius (86 to 89.6 degrees Fahrenheit).

Load Regulation Charts

Efficiency Graph

(Image credit: Tom’s Hardware)

Ripple Graphs

The lower the power supply’s ripple, the more stable the system will be and less stress will also be applied to its components.

Infrared Images

We apply a half-load for 10 minutes with the PSU’s top cover and cooling fan removed before taking photos with a modified Fluke Ti480 PRO camera able to deliver an IR resolution of 640×480 (307,200 pixels).

The temperature inside this low-capacity PSU are in control, even with the cooling fan removed and with a half-load applied for a ten-minute period. 

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Advanced Transient Response Tests

For details about our transient response testing, please click here.

In the real world, power supplies are always working with loads that change. It’s of immense importance, then, for the PSU to keep its rails within the ATX specification’s defined ranges. The smaller the deviations, the more stable your PC will be with less stress applied to its components. 

We should note that the ATX spec requires capacitive loading during the transient rests, but in our methodology, we also choose to apply a worst case scenario with no additional capacitance on the rails. 

Advanced Transient Response at 20% – 20ms

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VoltageBeforeAfterChangePass/Fail
12V12.019V11.714V2.54%Pass
5V5.149V4.983V3.23%Pass
3.3V3.342V3.131V6.32%Fail
5VSB5.076V5.008V1.33%Pass

Advanced Transient Response at 20% – 10ms

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VoltageBeforeAfterChangePass/Fail
12V12.019V11.530V4.07%Pass
5V5.150V4.938V4.11%Pass
3.3V3.342V3.134V6.23%Fail
5VSB5.076V4.980V1.89%Pass

Advanced Transient Response at 20% – 1ms

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VoltageBeforeAfterChangePass/Fail
12V12.019V11.577V3.67%Pass
5V5.150V4.940V4.09%Pass
3.3V3.342V3.138V6.09%Pass
5VSB5.076V4.989V1.72%Pass

Advanced Transient Response at 50% – 20ms

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VoltageBeforeAfterChangePass/Fail
12V11.989V11.732V2.14%Pass
5V5.144V4.971V3.36%Pass
3.3V3.336V3.118V6.55%Fail
5VSB5.062V5.004V1.15%Pass

Advanced Transient Response at 50% – 10ms

Swipe to scroll horizontally
VoltageBeforeAfterChangePass/Fail
12V11.989V11.741V2.07%Pass
5V5.144V4.970V3.37%Pass
3.3V3.336V3.117V6.56%Fail
5VSB5.062V4.991V1.41%Pass

Advanced Transient Response at 50% – 1ms

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VoltageBeforeAfterChangePass/Fail
12V11.989V11.709V2.34%Pass
5V5.145V4.928V4.22%Pass
3.3V3.336V3.117V6.56%Fail
5VSB5.062V4.947V2.27%Pass

Transient response is mediocre on all rails, but 5VSB, where it doesn’t matter so much. 

Turn-On Transient Tests

In the next set of tests, we measure the PSU’s response in simpler transient load scenarios—during its power-on phase. Ideally, we don’t want to see any voltage overshoots or spikes since those put a lot of stress on the DC-DC converters of installed components.

We didn’t notice the colossal voltage drop in the “PSU OFF To Full 12V” test that we found in the 550W model. Nevertheless, there is a voltage step in this test, which can create compatibility issues with some mainboards. 

Power Supply Timing Tests

There are several signals generated by the power supply, which need to be within specified, by the ATX spec, ranges. If they are not, there can be compatibility issues with other system parts, especially mainboards. From year 2022, the PSU’s Power-on time (T1) has to be lower than 150ms and the PWR_OK delay (T3) from 100 to 150ms, to be compatible with the Alternative Sleep Mode.

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PSU Timings Table
T1 (Power-on time) & T3 (PWR_OK delay)
LoadT1T3
20%38ms114ms
100%38ms113ms

The PWR_OK delay is within the 100-150ms region, so the PSU supports the alternative sleep mode recommended by the ATX spec.

Ripple Measurements

Ripple represents the AC fluctuations (periodic) and noise (random) found in the PSU’s DC rails. This phenomenon significantly decreases the capacitors’ lifespan because it causes them to run hotter. A 10-degree Celsius increase can cut into a cap’s useful life by 50%. Ripple also plays an important role in overall system stability, especially when overclocking is involved.

The ripple limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V, and 5VSB).

Swipe to scroll horizontally
Test12V5V3.3V5VSBPass/Fail
10% Load28.3 mV7.8 mV7.4 mV10.2 mVPass
20% Load26.6 mV9.4 mV8.7 mV13.7 mVPass
30% Load21.2 mV10.4 mV9.1 mV15.2 mVPass
40% Load18.5 mV11.2 mV10.1 mV16.0 mVPass
50% Load19.6 mV12.2 mV11.4 mV20.6 mVPass
60% Load15.8 mV12.7 mV11.3 mV19.0 mVPass
70% Load14.7 mV13.0 mV12.2 mV20.9 mVPass
80% Load16.6 mV14.5 mV14.6 mV19.2 mVPass
90% Load18.6 mV15.4 mV15.6 mV21.5 mVPass
100% Load30.9 mV17.0 mV17.9 mV27.5 mVPass
110% Load32.0 mV18.1 mV17.8 mV27.2 mVPass
Crossload 129.4 mV13.5 mV14.2 mV11.9 mVPass
Crossload 222.7 mV13.4 mV9.1 mV10.1 mVPass
Crossload 326.1 mV9.1 mV15.3 mV9.2 mVPass
Crossload 429.6 mV15.9 mV14.3 mV18.0 mVPass

Ripple suppression is good on all major rails. The 5VSB needs a better filtering cap, which is also the case for the 550W unit. 

Ripple At Full Load

Ripple At 110% Load

Ripple At Cross-Load 1

Ripple At Cross-Load 4

EMC Pre-Compliance Testing – Average & Quasi-Peak EMI Detector Results

Electromagnetic Compatibility (EMC) is the ability of a device to operate properly in its environment without disrupting the proper operation of other nearby devices.

Electromagnetic Interference (EMI) stands for the electromagnetic energy a device emits, and it can cause problems in other nearby devices if too high. For example, it can cause increased static noise in your headphones or/and speakers.

΅We use TekBox’s EMCview to conduct our EMC pre-compliance testing.

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Like in the 550W unit, a single spur exceeds the limits of the average and peak EMI detectors. Conducted EMI is low in all other frequencies. 

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Performance Rating

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Only the XPG Pylon 450, using a less advanced platform, takes the TUF unit’s performance lead. The difference would be minimal with correctly set OCP on the minor rails. 

Noise Rating

The graph below depicts the cooling fan’s average noise over the PSU’s operating range, with an ambient temperature between 30 to 32 degrees Celsius (86 to 89.6 degrees Fahrenheit).

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Under normal operating temperatures, the average noise output is low. 

Efficiency Rating

The following graph shows the PSU’s average efficiency throughout its operating range with an ambient temperature close to 30 degrees Celsius.

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The advanced platform easily takes the efficiency lead. 

Power Factor Rating

The following graphs show the PSU’s average power factor reading throughout its operating range with an ambient temperature close to 30 degrees Celsius and 115V/230V voltage input. 

PF readings should be higher, with 230V input. 

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The TUF line is a good choice for systems with low-energy demands, where a good-performing and reliable power supply is required. The smallest member of the line, with 450W max power, is the performance leader in this category and looks to be the only choice should you need an advanced platform now that Corsair has replaced the CX450 with the CX450M. The latter uses an older platform with some modern touches (the DC-DC converters for the minor rails). 

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The competing offerings from XPG (Pylon 450), Corsair (CX450M), and Thermaltake (Smart BM2 450W) are close in overall performance. Actually, the Pylon 450 manages to take the lead, but this can easily change if GW tunes a bit the advanced platform that the Asus TUF 450 uses. 

The TUF-Gaming Bronze line consists of capable and affordable members, and the 450W unit is among the best in its category. This will be an ideal PSU for an office PC which you need to be as reliable as it gets, or a download or server station, with low-energy needs. If you need more power but your budget is limited, you can look at one of the stronger TUF-Gaming models. 

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Disclaimer: Aris Mpitziopoulos is Tom’s Hardware’s PSU reviewer. He is also the Chief Testing Engineer of Cybenetics and developed the Cybenetics certification methodologies apart from his role on Tom’s Hardware. Neither Tom’s Hardware nor its parent company, Future PLC, are financially involved with Cybenetics. Aris does not perform the actual certifications for Cybenetics.