FSP Hydro PTM 750W Power Supply

REVIEW INFORMATION
SUPPLIED BY: FSP Group
MANUFACTURER: FSP Group
PRODUCT: Hydro PTM 750W
PROD LINK: Hydro PTM Product Page
PRICE: $134.99 @ NewEgg
Price is at the time of testing!

Today we will be using a SunMoon SM-5500ATE for loading the FSP Hydro PTM 750W. I’ll also be using a Rek PF9901 power meter, a USB Instruments Stingray oscilloscope, a dual probe thermometer, a Fluke digital multimeter, a CyberTech digital tachometer, and my custom hot box.

Let’s get the standby tests out of the way.

Hydro PTM 750W – STANDBY Load Tests
Test # +5VSB DC Watts/
AC Watts
Eff. P.F.
Load Tests
1 0.5 A 2.54 W/
2.95 W
85.95 % 0.307
5.071 V
2 1.25 A 6.30 W/
7.32 W
86.05 % 0.437
5.039 V
3 2.5 A 12.50 W/
14.80 W
84.46 % 0.506
5.000 V

Starting the standby tests off, we see that the load regulation comes in with a very respectable 1.42%.

Moving over to the efficiency side of the table, we see even better results. We are giving Wolf’s “most efficient” unit a run for its money.

Hydro PTM 750W – Cold Load Tests
Test # +3.3V +5V +12V +5VSB DC W/
AC W
AC
Input
Eff. P.F. Int /
Exh
RPM
Progressive Load Tests
1
(10%)
1.1 A 1.1 A 5.3 A 0.25 A 74.28 W/
85.90 W
123.9 V 86.47 % 0.986 19°C /
19°C
824.5
3.362 V 5.061 V 12.03 V 5.074 V
2
(20%)
2.3 A 2.3 A 10.7 A 0.5 A 150.54 W/
166.80 W
123.5 V 90.25 % 0.995 19°C /
19°C
825.5
3.358 V 5.054 V 12.03 V 5.057 V
3
(30%)
3.4 A 3.4 A 16.0 A 0.75 A 224.71 W/
245.10 W
122.6 V 91.68 % 0.997 19°C /
20°C
827.2
3.355 V 5.047 V 12.02 V 5.049 V
4
(50%)
5.7 A 5.7 A 26.7 A 1.25 A 374.99 W/
405.70 W
123.3 V 92.43 % 1.000 20°C /
21°C
828.6
3.347 V 5.033 V 12.02 V 5.035 V
5
(70%)
8.0 A 8.0 A 37.4 A 1.75 A 525.19 W/
572.00 W
122.7 V 91.82 % 1.000 20°C /
23°C
833.3
3.340 V 5.019 V 12.02 V 5.013 V
6
(80%)
9.2 A 9.2 A 42.8 A 2.00 A 601.25 W/
658.7 W
121.9 V 91.28 % 1.000 21°C /
24°C
835.0
3.336 V 5.011 V 12.02 V 4.999 V
7
(90%)
10.4 A 10.4 A 48.1 A 2.25 A 675.96 W/
744.10 W
122.7 V 90.84 % 1.000 21°C /
25°C
837.2
3.332 V 5.004 V 12.02 V 4.988 V
8
(100%)
11.5 A 11.5 A 53.5 A 2.50 A 750.99 W/
832.10 W
122.6 V 90.25 % 1.000 22°C /
26°C
1040.1
3.329 V 4.997 V 12.02 V 4.976 V
Crossload Tests
CL1
(+3.3V +5V)
14.4 A 14.4 A 0.0 A 0.0 A 120.18 W/
140.0 W
122.9 V 85.84 % 0.993 20°C /
20°C
830.0
3.343 V 5.003 V 12.03 V 5.077 V
CL2
(+12V)
0.0 A 0.0 A 62.5 A 0.0 A 751.09 W/
828.5 W
122.5 V 90.66 % 1.000 22°C /
26°C
930.2
3.346 V 5.047 V 12.02 V 5.071 V

Starting off with the load regulation. On the +3.3V rail, we have 1.0%. The +5V rail comes in a tad looser at 1.28%. The +12V rail brings in the tightest numbers with 0.08%. The +5VSB brings up the rear with 2.02%. Overall we’re looking pretty good so far.

With the Hydro PTM being 80PLUS Platinum rated means we should see 90% efficiency @ 20% load, 92% efficiency @ 50% load, and 89% efficiency @ 100% load. At 20% load in Test 2, we achieved 90.25%. At 50% load in Test 4, we achieved 92.43%. At full load in Test 8, we come in at 90.25%. So we did manage to achieve platinum efficiency, but we didn’t leave much room for error.

We can see that the Hydro PTM managed to stay pretty cool during the cold testing hitting a maximum of 26°C.

If you recall, our little graph showed that the fan should run at roughly 700RPM and start ramping up with a maximum of roughly 1200RPM. As you can see, we carried roughly 830RPM on average with a peak of 1040.1RPM during the full load test.