Site updated: 21.1.19

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I was easily able to determine the right set of products for my requirements from the website, the price was good and the... (6th January 2019 via Trustpilot)
Semi-Fanless ASM PSU, 620W
Semi-Fanless ASM PSU, 520W
Semi-Fanless ASM PSU, 450W

Nesteq Semi-Fanless ASM PSUs

- Replaced by the Nesteq ASM X-Zero Heat-piped Cooled Semi-Fanless Power Supplies

We receive many power supplies on evaluation here at Quiet PC from manufacturers who claim their products are quiet or silent. However, we are dubious when a power supply is marketed as being silent where the unit has a fan installed. Common sense dictates that fans make noise no matter how slowly they run, so for a manufacturer to claim such a product to be silent would in our view be misleading!

When we received an evaluation PSU from Nesteq, it didn't say "silent" on the box, it said "Advanced Silent Mode"! Having become accustomed to this sort of marketing-speak, we were expecting this power supply to be as noisy as the rest of the samples we receive, but in fact we were pleasantly surprised.

Advanced Silent Mode (ASM) is a very simple feature. It allows the PC power supply to run virtually fanless, with the 120mm fan only switching on when absolutely necessary. During our evaluation we installed the PC power supply in a system which incorporated 2 x 6800 Ultra graphics card in SLI mode, just to see how long it would remain silent. We were astonished to see that the fan hardly moved at all! About every two or three minutes the fan rotated for about ten to twenty seconds before stopping again. This approach seemed to keep the power supply relatively cool to the touch in comparison to other fanless power supplies. In fact, Nesteq state that their PC power supply will be completely fanless for 99% of the time while ASM is enabled!

One of the main reasons the Nesteq ASM PC power supply can run so quietly is the fact that it has an efficiency rating above 80%, meaning that it will not generate as much heat as other PC power supplies! Not only does this allow the PSU to run cooler, it also saves money because it will not draw as much power as a lower efficiency unit.

As well as the ASM feature, it is also possible to make the 120mm fan to run continuously, either automatically or manually. From a noise point of view this setting is marginally louder (20 - 30 dBA). If low noise is the primary reason for purchase then we strongly recommend using the ASM feature. The PC power supply also comes with a massive 36 months warranty!

The PSU is supplied with all the connectors you would expect on a high quality power supply. It is possible to detach 4-pins from the 24-pin ATX motherboard connector, making it compatible with 20-pin motherboards. The 8-pin EPS12V connector can also split making two 4-pin connectors, one of which is for the ATX12V connector for the latest AMD and Intel processors. These Nesteq PSUs are also great for SLI systems because two PCI-E connectors are supplied on different rails.

Please note: Nesteq is the new name for Elan Vital. So if you are looking for an Elan Vital PSU then please consider the Nesteqs as a direct replacement.

SpecificationsASM 450WASM 520WASM 620W
Model numberNA-4501 NA-5201 NA-6201
ATX12V Version2.2
+3.3V maximum output current25 A
+5V maximum output current30 A
+12V1 maximum output current18 A
+12V2 maximum output current18 A 22 A 30 A
Combined maximum output +3.3V / +5V150 W
Fan speed controlASM or Manual
Acoustic noise level0 - 30 db(A)
Dimensions86 x 150 x 140 mm
+5VSB maximum standby current2.5 A
Mains input voltage90-264 VAC, 47-63 Hz
ATX12V (4-pin) supportYes
EPS12V (8-pin) supportYes
20-pin ATX connectorYes
24-pin ATX connectorYes
PCI-E support (6-pin)Yes (x2)
Mains input voltage selectionAuto
Remote power on / offYes
Number of floppy drive connectors2
Number of hard drive connectors8
SATA connectors4
Over voltage protectionYes, on all outputs
Short circuit protectionYes, on all outputs
Safety approvalsCE, CB, TUV
Monitor pass-through power socketNo
Master power on/off switchYes
Length of motherboard power cable55 cm (approx)
Warranty36 months

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