Corsair TX550M & TX750M Power Supply Review

paulktreg - February 21, 2012
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Testing:

TX750M - Mains Input Voltage 110VAC

Corsair TX750M 750W (CMPSU-750TXM) DC Output Voltage Load Regulation
Supply = 116VAC/50Hz
PSU DC Rail	Rail Loading	Measured Voltage	Permitted Regulation	Actual Regulation
+3.3V	0	3.35V	3.3V±5%	+1.5%
+5V	0	5.09V	5.0V±5%	+1.8%
+12V	0	12.13V	12.0V±5%	+1.1%
-12V	0	11.90V	12.0V±10%	-0.8%
+5VSB	0	5.09V	5.0V±5%	+1.8%
Total PSU DC Loading = 0W (0% of Rated Maximum Output Power)

Corsair TX750M 750W (CMPSU-750TXM) DC Output Voltage Load Regulation
Supply = 116VAC/50Hz
PSU DC Rail	Rail Loading	Measured Voltage	Permitted Regulation	Actual Regulation
+3.3V	3.17A	3.33V	3.3V±5%	+0.9%
+5V	4.82A	5.06V	5.0V±5%	+1.2%
+12V	10.18A	12.10V	12.0V±5%	+0.8%
-12V	0.35A	11.85V	12.0V±10%	-1.3%
+5VSB	2.12A	4.88V	5.0V±5%	-2.4%
Total PSU DC Loading = 173W (23% of Rated Maximum Output Power)

Corsair TX750M 750W (CMPSU-750TXM) DC Output Voltage Load Regulation
Supply = 113VAC/50Hz
PSU DC Rail	Rail Loading	Measured Voltage	Permitted Regulation	Actual Regulation
+3.3V	8.19A	3.31V	3.3V±5%	+0.3%
+5V	9.57A	5.01V	5.0V±5%	+0.2%
+12V	23.68A	12.03V	12.0V±5%	+0.3%
-12V	0.35A	12.03V	12.0V±10%	+0.3%
+5VSB	2.00A	4.89V	5.0V±5%	-2.2%
Total PSU DC Loading = 374W (50% of Rated Maximum Output Power)

Corsair TX750M 750W (CMPSU-750TXM) DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU DC Rail	Rail Loading	Measured Voltage	Permitted Regulation	Actual Regulation
+3.3V	13.04A	3.28V	3.3V±5%	-0.6%
+5V	14.89A	4.95V	5.0V±5%	-1.0%
+12V	49.02A	11.95V	12.0V±5%	-0.4%
-12V	0.36A	12.28V	12.0V±10%	+2.3%
+5VSB	2.02A	4.82V	5.0V±5%	-3.6%
Total PSU DC Loading = 716W (95% of Rated Maximum Output Power)

TX750M - Mains Input Voltage 230VAC

Corsair TX750M 750W (CMPSU-750TXM) DC Output Voltage Load Regulation
Supply = 244VAC/50Hz
PSU DC Rail	Rail Loading	Measured Voltage	Permitted Regulation	Actual Regulation
+3.3V	0	3.35V	3.3V±5%	+1.5%
+5V	0	5.09V	5.0V±5%	+1.8%
+12V	0	12.14V	12.0V±5%	+1.2%
-12V	0	11.90V	12.0V±10%	-0.8%
+5VSB	0	5.09V	5.0V±5%	+1.8%
Total PSU DC Loading = 0W (0% of Rated Maximum Output Power)

Corsair TX750M 750W (CMPSU-750TXM) DC Output Voltage Load Regulation
Supply = 244VAC/50Hz
PSU DC Rail	Rail Loading	Measured Voltage	Permitted Regulation	Actual Regulation
+3.3V	3.17A	3.33V	3.3V±5%	+0.9%
+5V	4.80A	5.06V	5.0V±5%	+1.2%
+12V	10.07A	12.09V	12.0V±5%	+0.8%
-12V	0.35A	11.84V	12.0V±10%	-1.3%
+5VSB	2.12A	4.89V	5.0V±5%	-2.2%
Total PSU DC Loading = 171W (23% of Rated Maximum Output Power)

Corsair TX750M 750W (CMPSU-750TXM) DC Output Voltage Load Regulation
Supply = 243VAC/50Hz
PSU DC Rail	Rail Loading	Measured Voltage	Permitted Regulation	Actual Regulation
+3.3V	7.91A	3.30V	3.3V±5%	0
+5V	9.52A	5.01V	5.0V±5%	+0.2%
+12V	23.76A	12.04V	12.0V±5%	+0.3%
-12V	0.35A	12.00V	12.0V±10%	0
+5VSB	1.99A	4.84V	5.0V±5%	-3.2%
Total PSU DC Loading = 374W (50% of Rated Maximum Output Power)

Corsair TX750M 750W (CMPSU-750TXM) DC Output Voltage Load Regulation
Supply = 238VAC/50Hz
PSU DC Rail	Rail Loading	Measured Voltage	Permitted Regulation	Actual Regulation
+3.3V	13.05A	3.27V	3.3V±5%	-0.9%
+5V	14.85A	4.95V	5.0V±5%	-1.0%
+12V	49.05A	11.96V	12.0V±5%	-0.3%
-12V	0.37A	12.31V	12.0V±10%	+2.6%
+5VSB	2.02A	4.83V	5.0V±5%	-3.4%
Total PSU DC Loading = 717W (96% of Rated Maximum Output Power)

The Corsair TX750M produced a set of results that are better than that of the TX550M in this section, with the three main rails of the former staying well within the limits set down by the ATX12V specification and a worst case regulation of +1.8% on the +5V rail.