Seasonic Focus SGX-650 Power Supply review



We put the new Seasonic Focus SGX-650 power supply on our test bench today. It’s an SFX-L version of the Focus series, which has already become one of the most recommended PSUs on the market (even though it has had some compatibility issues with certain GPUs). The Seasonic Focus SGX-650 is a small form factor (SFX-L) power supply, but it’s still possible to install it in ATX systems. It has 80 plus Gold certification, which means that it’s 90% efficient at 50% load @ 110V, and even 92% efficient @ 230 V. The SFX format makes this model an interesting one for people with HTPC chassis. It seems that Seasonic has brought users an efficient, powerful, and reliable solution.

It’s a fully modular PSU, so even the motherboard connectors are not attached permanently (but you still have to use them, right?). This feature is not really necessary, as an increasing number of cases are now fitted with a power supply shroud, but it’s still easier to manage cables this way. The fan works in hybrid mode (semi-passive), so you should be able to achieve a very nice acoustic experience. What is quite surprising, is the size of the fan. It’s 120 mm, whereas the entire power supply measures just 125 mm. It’s the smallest PSU with this type of fan. It uses FBD bearings, and it’s controlled via a temperature sensor. The SGX-650 is built with 100% Japanese 105℃ capacitors, and they're a great choice for high-performance PCs where reliability is crucial.

There is also a variant with less power - a 450 W one. They’re both Gold Certified as well, which indicates at least 90% efficiency at 50% load (92% at 230 V). This is important, because the energy consumed does not go to waste (at least not in a significant amount), and this has an impact on your energy bill.

Seasonic’s Focus SGX-650 is backed by a 10-year warranty. This is a very good offer, as for example Corsair also offers 10 years for their higher-end series, whereas Seasonic itself provides even twelve years of warranty for their Prime series. MSRP Is about 130 EUR. Ok, let’s check this SFX-L PSU from Seasonic, shall we?