W1zzard
12-29-2007, 10:11 AM
[PAGE=Introduction & Packaging]
Introduction
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/logo.jpg
I would like to thank Xigmatek (http://www.xigmatek.com) for supplying the test sample.
Specifications from manufacturer
Multiple +12V Output
High Efficiency (up to 80%)
Active Power Factor Correction (0.99 PFC)
Double Forward Circuit Design
Universal AC Input(Full Range)
Smart and Silent Fan Control
13.5(14)cm Cooling Fan
PCI-Express Connector
Patented Easy Swap Connector
Cable Management Swap Connector
PC Power Supply Design Guide ATX / BTX / EPS.
Multiple Platforms
Output Protection
Completed protection OVP / OCP / OPP / UVP / SCP / OTP.
Mesh Sleeve Cable Design
Honey Comb Structure
Japan Electric Capacity
Packaging
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/package1_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/package1.jpg)
I think the Xigmatek package is one of the biggest PSU packages I have ever seen. It is standing upright and uses a flashy silver color theme to catch your attention. Even though some technical product details are missing because the package is used for three different PSU products it is a very nice design.
Box contents:
Power supply unit
Power Cord
Instruction Manual
Cables
Zip ties, screws
Transportation bag for cables
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/contents_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/contents.jpg)
<table class="resulttable" border="1" cellspacing="0" cellpadding="5">
<tr>
<th rowspan="2">Connectors</th>
<th align="center">Main Power</th>
<th align="center">5.25"</th>
<th align="center">Floppy</th>
<th align="center">4 Pin CPU</th>
<th align="center">SerialATA</th>
<th align="center">PCI-E Aux Power</th>
</tr>
<tr>
<td align="center">ATX 20+4 Pin</td>
<td align="center">8</td>
<td align="center">2</td>
<td align="center">2 + 2</td>
<td align="center">10</td>
<td align="center">3x 6 + 3x 6+2</td>
</tr>
</table>
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/cablelength.gif
[page=The PSU]
The PSU
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu1_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu1.jpg)
The power switch is illuminated when power is connected. The unit automatically detects the line voltage, so a 110V/220V switch is not needed.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu3_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu3.jpg)
Just like the 850W unit we reviewed recently, the NRP-HC1201 comes with a sticker on one side that mimics leather. This can add a nice touch to your system when viewed through the case window.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu2_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu2.jpg)
The back shows all the modular connections. As you can see some important cables like ATX power are always used. This has the advantage of ensuring optimum power delivery for those connections while giving you the convenience of modularity for the less often used connectors.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu4_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu4.jpg) http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu5_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu5.jpg)
The 140mm fan dominates the top of the unit.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/atx1_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/atx1.jpg) http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/atx2_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/atx2.jpg)
The motherboard connector supports both 20 and 24 pin operation. You can clip the two parts together for easy installation in small or crowded cases.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/12v1_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/12v1.jpg) http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/12v2_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/12v2.jpg)
The same is possible for the CPU power connector, they can be clipped together to form a solid connection.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/pcie_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/pcie.jpg)
The PCI-Express power connectors can either be used a 6 pin or 8 pin variant.
[pagE=PSU Inside & Test Equipment]
PSU Inside
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/warranty1_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/warranty1.jpg) http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/warranty2_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/warranty2.jpg)
Xigmatek has placed two stickers on top of screws that have to be removed to open the PSU. This will void your warranty, so don't do it.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/inside1_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/inside1.jpg) http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/inside2_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/inside2.jpg) http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/inside3_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/inside3.jpg) http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/inside4_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/inside4.jpg)
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/fan_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/fan.jpg)
Test Equipment
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/setup.jpg
The PSU is connected to an APC SmartUPS which supplies clean 220V input.
AC current is measured using a Peaktech 4010 desktop RS232 multimeter with 0.02A accuracy.
To measure DC output voltages of the PSU we use a Keithley 2700 6.5 digit data acquisition system. All three input voltages are measured at the same time using a solid state switching system.
Power Factor is measured using a generic Power Efficiency Meter.
Measurements for Ripple Voltage were obtained using a 100 MHz Tektronix TDS224 Digital Storage Oscilloscope.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/noisetest_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/noisetest.jpg)
Fan noise measurements are performed with an IEC Type 2 Sound level meter and this setup.
It consists of three high-power resistors and a Socket A motherboard. The motherboard creates a small load which makes sure the PSU turns on (some PSUs require a minimum load). Since there is no hardware installed in the motherboard, its power draw is negligible. The three resistors create a static load of 320W (120W @ 12V + 50W @ 5V + 150W @ 12V) - a typical high-performance system. This setup is also used to determine the power conversion efficiency of the PSU.
[page=Performance]
Performance
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/sticker_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/sticker.jpg)
The UL number E161451 reveals that the PSU is made by OEM manufacturer Channel Well Technology for Xigmatek.
<table class="resulttable" border="1" cellspacing="0" cellpadding="5">
<tr>
<th colspan="10">Xigmatek NRP-HC1201</th>
</tr>
<tr>
<th>AC Input</th>
<td colspan="9">100V-240V, 15A max., 47-63 Hz</td>
</tr>
<tr>
<th>DC Voltage</th>
<td align="center">+3.3V</td>
<td align="center">+12V1</td>
<td align="center">+12V4</td>
<td align="center">+5V</td>
<td align="center">+12V2</td>
<td align="center">+12V3</td>
<td align="center">+5VSB</td>
</tr>
<tr>
<th rowspan="3">Max. Output </th>
<td align="center">30A</td>
<td align="center">20A</td>
<td align="center">36A</td>
<td align="center">30A</td>
<td align="center">20A</td>
<td align="center">36A</td>
<td align="center">3.5A</td>
</tr>
<tr>
<td colspan="3" align="center">600W</td>
<td colspan="3" align="center">600W</td>
<td align="center">17.5W</td>
</tr>
<tr>
<td colspan="7" align="center">1200W</td>
</tr>
</table>
Please note the output configuration, two 12V and the 3.3V line are together and the 5V and two 12V lines also share a power limit.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psugraph.gif
Tested on: AMD Athlon64 FX-62 @ 2800 MHz, ABIT AT8, 2x 512 MB DDR400, WD Raptor 36 GB, Radeon X1900 XTX + Radeon X1900 XTX Crossfire
The 12V and 5V line are both very stable, the 3.3V line dropped out of the ATX specification range in our testing. We asked Xigmatek if they could verify this with one of their units and they confirmed that the low 3.3V line is actually a problem of our individual sample. Xigmatek's Test Report can be found here (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/report.pdf).
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/ripple.jpg
The ripple voltage is ok with an amplitude of 19 mV from top to bottom.
<table class="resulttable" border="1" cellspacing="0" cellpadding="5">
<tr>
<th>Standard deviation 12V</th>
<td align="right">5.47</td>
</tr>
<tr>
<th>Standard deviation 5V</th>
<td align="right">4.77</td>
</tr>
<tr>
<th>Standard deviation 3.3V</th>
<td align="right">8.21</td>
</tr>
<tr>
<th>Power Factor</th>
<td align="right">0.99</td>
</tr>
<tr>
<th>Ripple Voltage 12V</th>
<td align="right">18.6 mV</td>
</tr>
<tr>
<th>Power Efficiency @ 320 W</th>
<td align="right">80% (320W:400W)</td>
</tr>
</table>
Standard deviation is a statistical term, which tells how far away from the average the measurements are. In other words it's the average of the average.
A large standard deviation indicates that the data points are far from the average and a small standard deviation indicates that they are close within the average.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/efficiency.gif
With an efficiency rating of spot on 80.00% the Xigmatek NRP-HC1201 just makes it into the 80Plus logo range.
[PAGE=Fan Noise]
Fan Noise
For easier comparison of PSU fan noise results we have separated our test results into three groups with a chart each:
Up to 500W: Typical PSU ideal for a single video card system.
500W to 750W: Plenty of power available for most single and dual video card machines.
Over 750W: For the most hardcore, power hungry and overclocked setups.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/fannoise_500.gif http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/fannoise_750.gif http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/fannoise_1000.gif
Just like the Xigmatek 850W PSU we tested, the NRP-HC1201 has a fairly loud fan, especially in idle. Xigmatek has notified us that this problem has been fixed and retail power supplies will be running much quieter.
[page=Value & Conclusion]
Value and Conclusion
<table width="100%" cellpadding="5" cellspacing="0" id="result">
<tr><th>http://www.techpowerup.com/images/dollar.gif</th>
<td>
Xigmatek is asking around $360$300 for the NRP-HC1201. The PSU should be listed on Newegg soon.</td>
</tr><tr>
<th>http://www.techpowerup.com/images/thumbup.gif</th>
<td>
Stable 12V and 5V line
Modular
Large number of connectors
80+ efficiency
Cables are fully sleeved
1200W
</td>
</tr>
<tr>
<th>http://www.techpowerup.com/images/thumbdown.gif</th>
<td>
Noisy
High absolute price
Bigger than standard ATX
Low 3.3V line on our review sample
</td></tr>
<tr><th>8.1</th>
<td>
Xigmatek's new NRP-HC1201 is a solid 1200W power supply with a large number of features. The modularity concept works well and will make your life easier during installation. Even though the unit is bigger than the standard ATX form factor, it should fit all cases. If you need that much power you will usually have a big case anyway.<br />
1200W of power may sound like a lot, and it is. So before just shopping for big numbers (and spending big numbers) make sure you really know what kind of power draw to expect from your system. This will also save you quite some money, because you don't pay for power delivery capability that you will never use. The fan noise of our sample was high, but as Xigmatek has told us, the loud fan speeds will be fixed in the revision that goes on store shelves, so this is not really an issue.
</td></tr>
<tr><th></th><td>http://www.techpowerup.com/images/recommended.gif</td></tr>
</table>
Introduction
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/logo.jpg
I would like to thank Xigmatek (http://www.xigmatek.com) for supplying the test sample.
Specifications from manufacturer
Multiple +12V Output
High Efficiency (up to 80%)
Active Power Factor Correction (0.99 PFC)
Double Forward Circuit Design
Universal AC Input(Full Range)
Smart and Silent Fan Control
13.5(14)cm Cooling Fan
PCI-Express Connector
Patented Easy Swap Connector
Cable Management Swap Connector
PC Power Supply Design Guide ATX / BTX / EPS.
Multiple Platforms
Output Protection
Completed protection OVP / OCP / OPP / UVP / SCP / OTP.
Mesh Sleeve Cable Design
Honey Comb Structure
Japan Electric Capacity
Packaging
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/package1_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/package1.jpg)
I think the Xigmatek package is one of the biggest PSU packages I have ever seen. It is standing upright and uses a flashy silver color theme to catch your attention. Even though some technical product details are missing because the package is used for three different PSU products it is a very nice design.
Box contents:
Power supply unit
Power Cord
Instruction Manual
Cables
Zip ties, screws
Transportation bag for cables
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/contents_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/contents.jpg)
<table class="resulttable" border="1" cellspacing="0" cellpadding="5">
<tr>
<th rowspan="2">Connectors</th>
<th align="center">Main Power</th>
<th align="center">5.25"</th>
<th align="center">Floppy</th>
<th align="center">4 Pin CPU</th>
<th align="center">SerialATA</th>
<th align="center">PCI-E Aux Power</th>
</tr>
<tr>
<td align="center">ATX 20+4 Pin</td>
<td align="center">8</td>
<td align="center">2</td>
<td align="center">2 + 2</td>
<td align="center">10</td>
<td align="center">3x 6 + 3x 6+2</td>
</tr>
</table>
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/cablelength.gif
[page=The PSU]
The PSU
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu1_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu1.jpg)
The power switch is illuminated when power is connected. The unit automatically detects the line voltage, so a 110V/220V switch is not needed.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu3_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu3.jpg)
Just like the 850W unit we reviewed recently, the NRP-HC1201 comes with a sticker on one side that mimics leather. This can add a nice touch to your system when viewed through the case window.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu2_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu2.jpg)
The back shows all the modular connections. As you can see some important cables like ATX power are always used. This has the advantage of ensuring optimum power delivery for those connections while giving you the convenience of modularity for the less often used connectors.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu4_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu4.jpg) http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu5_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psu5.jpg)
The 140mm fan dominates the top of the unit.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/atx1_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/atx1.jpg) http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/atx2_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/atx2.jpg)
The motherboard connector supports both 20 and 24 pin operation. You can clip the two parts together for easy installation in small or crowded cases.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/12v1_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/12v1.jpg) http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/12v2_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/12v2.jpg)
The same is possible for the CPU power connector, they can be clipped together to form a solid connection.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/pcie_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/pcie.jpg)
The PCI-Express power connectors can either be used a 6 pin or 8 pin variant.
[pagE=PSU Inside & Test Equipment]
PSU Inside
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/warranty1_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/warranty1.jpg) http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/warranty2_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/warranty2.jpg)
Xigmatek has placed two stickers on top of screws that have to be removed to open the PSU. This will void your warranty, so don't do it.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/inside1_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/inside1.jpg) http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/inside2_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/inside2.jpg) http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/inside3_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/inside3.jpg) http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/inside4_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/inside4.jpg)
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/fan_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/fan.jpg)
Test Equipment
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/setup.jpg
The PSU is connected to an APC SmartUPS which supplies clean 220V input.
AC current is measured using a Peaktech 4010 desktop RS232 multimeter with 0.02A accuracy.
To measure DC output voltages of the PSU we use a Keithley 2700 6.5 digit data acquisition system. All three input voltages are measured at the same time using a solid state switching system.
Power Factor is measured using a generic Power Efficiency Meter.
Measurements for Ripple Voltage were obtained using a 100 MHz Tektronix TDS224 Digital Storage Oscilloscope.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/noisetest_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/noisetest.jpg)
Fan noise measurements are performed with an IEC Type 2 Sound level meter and this setup.
It consists of three high-power resistors and a Socket A motherboard. The motherboard creates a small load which makes sure the PSU turns on (some PSUs require a minimum load). Since there is no hardware installed in the motherboard, its power draw is negligible. The three resistors create a static load of 320W (120W @ 12V + 50W @ 5V + 150W @ 12V) - a typical high-performance system. This setup is also used to determine the power conversion efficiency of the PSU.
[page=Performance]
Performance
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/sticker_small.jpg (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/sticker.jpg)
The UL number E161451 reveals that the PSU is made by OEM manufacturer Channel Well Technology for Xigmatek.
<table class="resulttable" border="1" cellspacing="0" cellpadding="5">
<tr>
<th colspan="10">Xigmatek NRP-HC1201</th>
</tr>
<tr>
<th>AC Input</th>
<td colspan="9">100V-240V, 15A max., 47-63 Hz</td>
</tr>
<tr>
<th>DC Voltage</th>
<td align="center">+3.3V</td>
<td align="center">+12V1</td>
<td align="center">+12V4</td>
<td align="center">+5V</td>
<td align="center">+12V2</td>
<td align="center">+12V3</td>
<td align="center">+5VSB</td>
</tr>
<tr>
<th rowspan="3">Max. Output </th>
<td align="center">30A</td>
<td align="center">20A</td>
<td align="center">36A</td>
<td align="center">30A</td>
<td align="center">20A</td>
<td align="center">36A</td>
<td align="center">3.5A</td>
</tr>
<tr>
<td colspan="3" align="center">600W</td>
<td colspan="3" align="center">600W</td>
<td align="center">17.5W</td>
</tr>
<tr>
<td colspan="7" align="center">1200W</td>
</tr>
</table>
Please note the output configuration, two 12V and the 3.3V line are together and the 5V and two 12V lines also share a power limit.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/psugraph.gif
Tested on: AMD Athlon64 FX-62 @ 2800 MHz, ABIT AT8, 2x 512 MB DDR400, WD Raptor 36 GB, Radeon X1900 XTX + Radeon X1900 XTX Crossfire
The 12V and 5V line are both very stable, the 3.3V line dropped out of the ATX specification range in our testing. We asked Xigmatek if they could verify this with one of their units and they confirmed that the low 3.3V line is actually a problem of our individual sample. Xigmatek's Test Report can be found here (http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/report.pdf).
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/ripple.jpg
The ripple voltage is ok with an amplitude of 19 mV from top to bottom.
<table class="resulttable" border="1" cellspacing="0" cellpadding="5">
<tr>
<th>Standard deviation 12V</th>
<td align="right">5.47</td>
</tr>
<tr>
<th>Standard deviation 5V</th>
<td align="right">4.77</td>
</tr>
<tr>
<th>Standard deviation 3.3V</th>
<td align="right">8.21</td>
</tr>
<tr>
<th>Power Factor</th>
<td align="right">0.99</td>
</tr>
<tr>
<th>Ripple Voltage 12V</th>
<td align="right">18.6 mV</td>
</tr>
<tr>
<th>Power Efficiency @ 320 W</th>
<td align="right">80% (320W:400W)</td>
</tr>
</table>
Standard deviation is a statistical term, which tells how far away from the average the measurements are. In other words it's the average of the average.
A large standard deviation indicates that the data points are far from the average and a small standard deviation indicates that they are close within the average.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/efficiency.gif
With an efficiency rating of spot on 80.00% the Xigmatek NRP-HC1201 just makes it into the 80Plus logo range.
[PAGE=Fan Noise]
Fan Noise
For easier comparison of PSU fan noise results we have separated our test results into three groups with a chart each:
Up to 500W: Typical PSU ideal for a single video card system.
500W to 750W: Plenty of power available for most single and dual video card machines.
Over 750W: For the most hardcore, power hungry and overclocked setups.
http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/fannoise_500.gif http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/fannoise_750.gif http://www.techpowerup.com/reviews/Xigmatek/NRP-HC1201/images/fannoise_1000.gif
Just like the Xigmatek 850W PSU we tested, the NRP-HC1201 has a fairly loud fan, especially in idle. Xigmatek has notified us that this problem has been fixed and retail power supplies will be running much quieter.
[page=Value & Conclusion]
Value and Conclusion
<table width="100%" cellpadding="5" cellspacing="0" id="result">
<tr><th>http://www.techpowerup.com/images/dollar.gif</th>
<td>
Xigmatek is asking around $360$300 for the NRP-HC1201. The PSU should be listed on Newegg soon.</td>
</tr><tr>
<th>http://www.techpowerup.com/images/thumbup.gif</th>
<td>
Stable 12V and 5V line
Modular
Large number of connectors
80+ efficiency
Cables are fully sleeved
1200W
</td>
</tr>
<tr>
<th>http://www.techpowerup.com/images/thumbdown.gif</th>
<td>
Noisy
High absolute price
Bigger than standard ATX
Low 3.3V line on our review sample
</td></tr>
<tr><th>8.1</th>
<td>
Xigmatek's new NRP-HC1201 is a solid 1200W power supply with a large number of features. The modularity concept works well and will make your life easier during installation. Even though the unit is bigger than the standard ATX form factor, it should fit all cases. If you need that much power you will usually have a big case anyway.<br />
1200W of power may sound like a lot, and it is. So before just shopping for big numbers (and spending big numbers) make sure you really know what kind of power draw to expect from your system. This will also save you quite some money, because you don't pay for power delivery capability that you will never use. The fan noise of our sample was high, but as Xigmatek has told us, the loud fan speeds will be fixed in the revision that goes on store shelves, so this is not really an issue.
</td></tr>
<tr><th></th><td>http://www.techpowerup.com/images/recommended.gif</td></tr>
</table>