
The SAMA XF750W is a 750W, fully modular ATX power supply with a hybrid fan mode, available for $95.99 USD on Newegg and Amazon. The SAMA XF750W is advertised as both the XF750W and with the model number KTX-750-1. Despite its attractive price and features, our testing of two units revealed significant reliability issues, as both stopped functioning before we completed our tests.
Both of the units died during the 20°C OCP tests - one during the -12V rail test and the other during the 12V rail test. While the OCP feature technically succeeded by shutting down to prevent hazards, most users would expect their power supply to recover after such tests.
We tested the first unit following the standard procedure, and it failed during the 12V rail OCP test. For the second unit, we deviated from the standard order, suspecting that the OCP and OPP tests might cause failure. This proved accurate, as the second unit also failed during the -12V rail OCP test. Hence, we have 40°C results for some of the other tests.
Additionally, marketing for this power supply was inconsistent, with product details sometimes for the 850W version instead of the 750W, as well as missing power supply specifications. Due to these reliability issues, we cannot recommend the SAMA XF750W.
WHAT YOU NEED TO KNOW
THE GOOD
- Warranty
It comes with a 10-year warranty.
- OCP
The Over Current Protection (OCP) feature worked as intended by shutting down before causing any hazards, although users would prefer if the power supply recovered afterward.
THE BAD
- Specifications
The power supply lacks many important specifications such as ATX version, fan size, official model, and 80PLUS rating, with mislabeled marketing across different listings including its own official storefronts.
- Failed Testing
Testing was incomplete due to hardware failures. This happened with two different samples.
THE REST
- Color
It does come in a rare white colorway with even rarer all-white cables and connectors.
- Overall
Labs does not recommend this PSU. Both units failed before completing the full test suite. As a result, we cannot ensure its performance under high loads or its potential impact on your computer.
The SAMA XF750W includes standard accessories, with the addition of a cable bag and velcro cable ties. It includes relatively flexible all-white cables with white connectors with a braided pattern. The power supply includes a fanless mode, and a regular fan mode, that can be controlled by a physical on/off button. Despite no official specification for fan size, Labs measured it to be 110 mm. The 12VHPWR cable is rated for 450W, not 600W, though this power supply likely is not going to be used for any 600W 12VHPWR devices.
Labs could not verify the ATX version as there are no official specifications from the manufacturer. SAMA does not have temperature specifications listed and Labs cannot verify operating temperatures through testing.
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Front of the box.
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Power input side of the PSU.

Top of the PSU displaying the fan.

Bottom of the PSU displaying the specifications.
+12 V | +5 V | +3.3 V | +5 Vsb | -12 V | |
---|---|---|---|---|---|
CURRENT | 62 A | 20 A | 20 A | 3 A | 0.3 A |
WATTAGE | 744 W | 100 W | 15 W | 3.6 W | |
750 W |
Please note that the above ratings are manufacturer advertised specifications.
The SAMA XF750W is advertised under two names: the XF750W and the model number KTX-750-1. In the 80PLUS rating report, it is listed as KTX-750-1. The power supply comes with all standard protections, and during testing, the OCP succeeded in preventing faults, such as fire, shock, and temperature hazards. However, both tested samples stopped functioning during the OCP tests. While the ATX specification only requires safe operation and not recovery from OCP, this behavior may not meet user expectations. The power supply is advertised with a 10-year warranty.
Voltage ripple was not out of the ordinary, with the 12V rail showing slightly higher ripple than others but still within average limits. Load regulation was generally good, though the -12V rail exhibited a strange but not atypical pattern for ATX power supplies. The power supply failed to operate for many excursions, failing the 0.1 ms, 1 ms and 10 ms excursions.
Please note that excursion tests are only required and designed for ATX 3.0 or higher power supplies. Since this power supply does not advertise an ATX version, its excursion results are not necessarily indicative of a failure based on ATX 3.0 standards. However, conducting excursion tests are still relevant for any power supply in a modern system.
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The SAMA XF750W demonstrated good efficiency, meeting all requirements for 80PLUS Gold and borderline Platinum across most of the load range. It showed reasonable resilience to brownouts and power cuts. During OCP testing, one sample delivered 1,800% on the -12V rail before failing, drooping to -9.8V output before it died. The other sample failed during the 12V rail OCP tests at 115V, supplying 88A before it failed permanently.
