Testing
We are using an ElmorLabs PMD2 that monitors and measures voltage, current, and power flowing through the CPU, GPU and motherboard power cables.
Our testing methodology will now be using OCBase’s OCCT Enterprise Edition software for power loading and monitoring. Tweaking the OCCT Stability Test, we can set different power loads for the PSU easier rather than playing around with various software to achieve set power loads. All testing is conducted using the 230V residential power standard.
Methodology
The ElmorLabs PMD2 offer a couple of testing points – two 8-pin EPS connectors (EPS1 and EPS2), three +12V 8-pin PCIE (PCIE1, PCIE2, and PCI3), and readings on the 24-pin which include +12V, +5, and +3.3. We will be monitoring and recording the voltages and wattage on each of these power cables. The PMD2 cannot monitor the +12V on the SATA/MOLEX power cables. For that, we will still be using a multimeter to also monitor the voltages delivered to the SATA/MOLEX cables.
Power load will be at 10% increments using the OCCT Stability Test running for 5 minutes – as much as our current testing setup allows which is currently 750W~800W with the following testing configuration below:
Results
The recorded voltages represent the average readings taken during each 5-minute power-load run using the OCCT Stability Test.
Voltages
Voltage Regulation
OCCT Stability Tests
The graphs above illustrate the PMD2 readings recorded during the 60% load and maximum workload tests using the OCCT Stability Test. Across both scenarios, the +12 V readings on the PCIe and EPS output cables consistently remain above 12.000 V, which is also reflected in the accompanying table. From under 10% load up to roughly 70% load — technically around 75%, as the system’s average peak power draw reached 752 W — all measured +12 V rails maintained values above the 12.000 V threshold.
Maximum Load Readings
Overall, the Pure Power 13 M 1000W demonstrates impressive voltage regulation, typically within the 1–2% range on most rails, with the exception of the +12 V rail on the peripheral/Molex outputs. Despite this, the PSU delivers stable and reliable power to the system’s most critical components, namely the CPU, motherboard, and graphics cards, via the EPS and PCIe power outputs.
At full load, the PMD2 reads 754W at one point while the watt meter on the socket reads 785W. This demonstrates the efficiency of the PSU which is above 90%.
Acoustics
Be quiet! is known silent cooling and the integration of the be quiet!-designed cooling fan on the Pure Power 13 M aims to demonstrate that. The Pure Power 13 M 1000W did score a Cybenetics Lambda A++ noise level rating which is the highest noise level rating – same with the Seasonic PRIME TX-1600 Noctua Edition 1600W PSU.
The Pure Power 13 M features semi-passive cooling wherein the fan does not spin at low loads and temperatures offering silent operation under such circumstances. At high workloads wherein the PSU’s fan starts to spin, it’s quiet compared to other components in our test PC.
At maximum workload, noise level readings vary in different sample points. Near the PSU, reading is around 56 dBA. Pointing near the graphics cards, the noise level bumps up to 63 dBA. Overall, the Pure Power 13 M would be the least of your worries when it comes to noise generated on your computer particularly with triple-fan graphics cards and large CPU coolers.
We are using an ElmorLabs PMD2 that monitors and measures voltage, current, and power flowing through the CPU, GPU and motherboard power cables.
Our testing methodology will now be using OCBase’s OCCT Enterprise Edition software for power loading and monitoring. Tweaking the OCCT Stability Test, we can set different power loads for the PSU easier rather than playing around with various software to achieve set power loads. All testing is conducted using the 230V residential power standard.
Methodology
The ElmorLabs PMD2 offer a couple of testing points – two 8-pin EPS connectors (EPS1 and EPS2), three +12V 8-pin PCIE (PCIE1, PCIE2, and PCI3), and readings on the 24-pin which include +12V, +5, and +3.3. We will be monitoring and recording the voltages and wattage on each of these power cables. The PMD2 cannot monitor the +12V on the SATA/MOLEX power cables. For that, we will still be using a multimeter to also monitor the voltages delivered to the SATA/MOLEX cables.
Power load will be at 10% increments using the OCCT Stability Test running for 5 minutes – as much as our current testing setup allows which is currently 750W~800W with the following testing configuration below:
CPU: Intel Core i7-13700K (5.3GHz)
Cooling: Noctua NH-D15 G2
Motherboard: GIGABYTE Z790 AORUS EXTREME X
Graphics Card: GIGABYTE GeForce RTX 3070 EAGLE OC / COLORFUL iGame GeForce RTX 4060 Ti
Memory: ADATA XPG Lancer DDR5-8000 32GB Kit
Storage: ADATA Legend 960 Max 1TB / 2TB Seagate SkyHawk 5900 RPM
PSU: be quiet! Pure Power 13 M 1000W
Cooling: Noctua NH-D15 G2
Motherboard: GIGABYTE Z790 AORUS EXTREME X
Graphics Card: GIGABYTE GeForce RTX 3070 EAGLE OC / COLORFUL iGame GeForce RTX 4060 Ti
Memory: ADATA XPG Lancer DDR5-8000 32GB Kit
Storage: ADATA Legend 960 Max 1TB / 2TB Seagate SkyHawk 5900 RPM
PSU: be quiet! Pure Power 13 M 1000W
Results
The recorded voltages represent the average readings taken during each 5-minute power-load run using the OCCT Stability Test.
Voltages
Voltage Regulation
OCCT Stability Tests
The graphs above illustrate the PMD2 readings recorded during the 60% load and maximum workload tests using the OCCT Stability Test. Across both scenarios, the +12 V readings on the PCIe and EPS output cables consistently remain above 12.000 V, which is also reflected in the accompanying table. From under 10% load up to roughly 70% load — technically around 75%, as the system’s average peak power draw reached 752 W — all measured +12 V rails maintained values above the 12.000 V threshold.
Maximum Load Readings
Overall, the Pure Power 13 M 1000W demonstrates impressive voltage regulation, typically within the 1–2% range on most rails, with the exception of the +12 V rail on the peripheral/Molex outputs. Despite this, the PSU delivers stable and reliable power to the system’s most critical components, namely the CPU, motherboard, and graphics cards, via the EPS and PCIe power outputs.
At full load, the PMD2 reads 754W at one point while the watt meter on the socket reads 785W. This demonstrates the efficiency of the PSU which is above 90%.
Acoustics
Be quiet! is known silent cooling and the integration of the be quiet!-designed cooling fan on the Pure Power 13 M aims to demonstrate that. The Pure Power 13 M 1000W did score a Cybenetics Lambda A++ noise level rating which is the highest noise level rating – same with the Seasonic PRIME TX-1600 Noctua Edition 1600W PSU.
The Pure Power 13 M features semi-passive cooling wherein the fan does not spin at low loads and temperatures offering silent operation under such circumstances. At high workloads wherein the PSU’s fan starts to spin, it’s quiet compared to other components in our test PC.
At maximum workload, noise level readings vary in different sample points. Near the PSU, reading is around 56 dBA. Pointing near the graphics cards, the noise level bumps up to 63 dBA. Overall, the Pure Power 13 M would be the least of your worries when it comes to noise generated on your computer particularly with triple-fan graphics cards and large CPU coolers.
