Product comparison · 2 power supply units

Chieftec SFX-450BS power supply unit vs UNYKAch 51976 power supply unit

17specifications compared
12differ
5identical
24known for one product only

Key differences

Total power
- SFX-450BS power supply unit:450 W
- 51976 power supply unit:900 W
AC input voltage
- SFX-450BS power supply unit:230 V
- 51976 power supply unit:100 - 240 V
Efficiency
- SFX-450BS power supply unit:85%
- 51976 power supply unit:80%
Number of SATA power connectors
- SFX-450BS power supply unit:2
- 51976 power supply unit:6
Peripheral (Molex) power connectors (4-pin)
- SFX-450BS power supply unit:1
- 51976 power supply unit:4
Power supply unit (PSU) form factor
- SFX-450BS power supply unit:SFX
- 51976 power supply unit:ATX
Product colour
- SFX-450BS power supply unit:Silver
- 51976 power supply unit:Black
Fan diameter
- SFX-450BS power supply unit:8 cm
- 51976 power supply unit:12 cm

Side by side

Differences highlightedShow differences only

Comparison of SFX-450BS, 51976
41 specifications	A Chieftec SFX-450BS power supply unit Model SFX-450BS View product	B UNYKAch 51976 power supply unit Model 51976 View product
Power3 differ
Total powerDiffers	450 W	900 W
AC input voltageDiffers	230 V	100 - 240 V
AC input frequencyKnown for one	50 Hz	Unknown — not stated by the source
Input currentKnown for one	3.5 A	Unknown — not stated by the source
Power factorKnown for one	0.9	Unknown — not stated by the source
Power Factor Correction (PFC) type	Active	Active
Combined power (+3.3V)Known for one	120 W	Unknown — not stated by the source
Combined power (+5V)Known for one	120 W	Unknown — not stated by the source
Combined power (-12V)Known for one	6 W	Unknown — not stated by the source
Combined power (+5Vsb)Known for one	15 W	Unknown — not stated by the source
Max output current (+3.3V)Known for one	21 A	Unknown — not stated by the source
Max output current (+12V1)Known for one	36 A	Unknown — not stated by the source
Max output current (+5V)Known for one	22 A	Unknown — not stated by the source
Max output current (-12V)Known for one	0.5 A	Unknown — not stated by the source
Max output current (+5Vsb)Known for one	3 A	Unknown — not stated by the source
EfficiencyDiffers	85%	80%
Maximum input current (@110V)Known for one	Unknown — not stated by the source	+12V
Power protection featuresKnown for one	Unknown — not stated by the source	Over voltage, Short circuit
Ports & interfaces2 differ
Motherboard power connector	20+4 pin ATX	20+4 pin ATX
Number of SATA power connectorsDiffers	2	6
Peripheral (Molex) power connectors (4-pin)Differs	1	4
ATX power connector (20+4 pin)Known for one	Yes	Unknown — not stated by the source
Floppy drive power connectorKnown for one	1	Unknown — not stated by the source
Cabling typeKnown for one	Non-Modular	Unknown — not stated by the source
PCI Express power connectors (6+2 pin)Known for one	Unknown — not stated by the source	2
CPU power connector (4+4 pin)Known for one	Unknown — not stated by the source	Yes
Floppy disk drive connectorKnown for one	Unknown — not stated by the source	Yes
Performance1 differ
Purpose	PC	PC
Power supply unit (PSU) form factorDiffers	SFX	ATX
ATX version	2.3	2.3
80 PLUS certificationKnown for one	Unknown — not stated by the source	80 PLUS Bronze
Design2 differ
Product colourDiffers	Silver	Black
Fan diameterDiffers	8 cm	12 cm
Number of fans	1 fan(s)	1 fan(s)
Fan locationKnown for one	Unknown — not stated by the source	Top
On/off switchKnown for one	Unknown — not stated by the source	Yes
Certificates1 differ
CertificationDiffers	UVP; OVP; SCP; OPP; AFC;	CE, TUV, ErP617, EN60950
Compliance certificatesKnown for one	Unknown — not stated by the source	RoHS
Weight & dimensions3 differ
WidthDiffers	125 mm	140 mm
DepthDiffers	100 mm	150 mm
HeightDiffers	64 mm	85 mm

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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