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Hydro G 650W Semi-Fanless Modular PSU, 80+ Gold
2 in stock
(6 customer ratings / 2 reviews)

FSP Hydro G Semi-Fanless Modular PSUs

FSP's Hydro G PSUs feature a semi-fanless design to help keep noise to a minimum. They are all 80PLUS GOLD certified and are SLI and Crossfire ready.

FSP Hydro G series stands for the needs of PC DIY enthusiasts and gamers who want a high end PSU with stylish ID design but do not want to compromise electronic performance at all. By server grade circuit and advanced thermal layout design, Hydro G series deliver full load at 50°C ambient temperature. Silent operation is achievable by an intelligent fan speed control circuit design with 0dBA function to maintain a quiet environment.


  1. Semi-fanless design for silent operation
  2. Full Japan-made electrolytic capacitors
  3. Powerful single +12V rail design
  4. SLI and Crossfire ready
  5. 80PLUS gold certification
  6. Full protections: OCP, OVP, SCP, OPP, UVP, OTP

Modular design and customisable options

FSP Hydro PSUs are 100% modular which allows customer to use only the cables required to power all installed components. This not only makes the install clean and tidy but also helps to increase system airflow which could be blocked with used non-modular cables. FAP have also made it possible to customise the PSU with alternative stickers of the side of the PSU. If you are interested in making the PSU match the internal colour scheme of the system then two red and green theme stickers are available to allow for this.

High quality Japanese capacitors

FSP have chosen to utilise Japanese capacitors. The main reason for this is to give the PSU longevity and reliability as Japanese capacitors are renowned for being the best available.

FSP have also introduced a new heat dissipation design that conducts heat through a thermal pad on the bottom of the power supply which transforms the whole PSU casing into a heat-sink.

Noise Levels

The chart to the left shows the respective noise level depending on the load of the PSU. As you can see anything below a 25% load will stop the fan from spinning meaning the PSU will be 100% silent which is excellent news for customers wanting the quietest option. When the load increases so does the fan speed. The PSUs are designed to stay at a low noise level for loads under 50%. If the fan remains below 1000 RPM then we would consider it to be extremely quiet.

Plethora of cabling options

All power cables supplied with the Hydro G power supply are of the "ribbon cable" design. This makes the installation extremely tidy and easy to work with. Gamers will be happy to note that PCIe connectors for multiple graphics cards are available. 650W version can accommodate two graphics, while the 750 and 850W PSUs support up to three graphics. Numerous SATA and Molex power connectors are also available. See the specifications cable below for exact details.

SpecificationsHydro G 650W
80PLUS CertificationGOLD
Input Voltage100 ~ 240Vac
Input Current8.5A
Frequency50 - 60Hz
DC Output +3.3V25A
DC Output +5V25A
DC Output +12V54A
DC Output -12V0.5A
DC Output +5Vsb3.5A
Combined +3.3V and +5V150W
Total Power650W
PFCActive PFC (0.99)
Over-Current ProtectionYes
Over-Voltage ProtectionYes
Short-Circuit ProtectionYes
Over-Power ProtectionYes
Under-Voltage ProtectionYes
Over-Temperature ProtectionYes
Case ColorBlack
Chassis FanFDB Fan, 135mm
Noise15 dBA at 50% loading
Form FactorATX 12V V2.4 & EPS 12V V2.92
Safety ApprovalCE, CB, TUV, C-tick
ATX12V 20+4pin1
CPU 4+4pin1
PCI-E 2.0 6+2pin4
Molex 4pin5
Floppy 4pin1
Dimensions (LxWxH) mm150 x 170 x 86
Warranty60 months
EAN barcode4711140489704

Customer Reviews

A 5-star PSU, but it came with an EU mains lead!


As a PSU it seems to be brilliant. It replaced an Elan Vital 400W and it's not a very power-hungry PC, so even at 100% CPU load the fan isn't running (or is running too slowly to hear) and the case is cool. A big improvement.

It doesn't matter to me that I now have yet another EU-style mains lead to join the pile, since I already had a UK lead on the PC. Anyone fitting it to a new PSU might get stuck without a lead, though.

Excellent service as usual


Ordered Monday morning, delivered Tuesday lunchtime; excellent service as usual.

This was ordered to replace an ageing Zalman power supply that was getting a bit noisy. After replacing the power supply my server is now as near silent as can be with only a faint hum of the disks rotating.

I now just need to save up and replace the disks with SSD's for a completely silent server.


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