Seasonic G-650 PSU, good enough for my new Ryzen build?

starmanwarz · 15 Oct 2019 at 16:23

I've had the G-650 for a few years now powering an OC'ed 4770K and 780 and I'm building a new PC with:

3700X
5700 XT Nitro
16GB RAM
3 fans
2 SSD's
2 HDD's

Is it going to be enough? It was quite expensive at the time and it's supposed to be a high quality PSU according to reviews.

650 Watts is probably fine, it doesn't matter that it's older tech, right?

It's this one:

https://seasonic.com/g-series

snips86x · 15 Oct 2019 at 16:25

Don't see why you shouldn't be OK to be honest. New hardware isn't as hungry as it used to be, but if you find yourself needing some more power, a decent 750w will be perfect.

Grimley · 15 Oct 2019 at 19:01

For what its worth, I put my 4 year old 550W g-series PSU into my Nephews build, which is a R5 2600 & a 570 4GB card & that was back in July. He normally gripes at me if there is a problem & there hasn't been (Touch wood

) If there is then its a 2 hour drive up to Northampton as he's at Uni there.

So I can't see it being a problem & I'd power your rig with a Seasonic G-series 550W if it was me.

pastymuncher · 15 Oct 2019 at 19:23

It should be more than enough power and was a decent psu when launched (I used to have the 750w).

starmanwarz · 15 Oct 2019 at 20:26

Excellent, thanks guys.

One more question, I'm also getting a new case (Fractal Design Meshify S2) and I see that in these newer cases the PSU is at the bottom of the case instead of at the top, is this going to be a problem?

pastymuncher · 16 Oct 2019 at 09:52

The bottom of the case with the psu drawing air through a filtered vent from outside the case is where the psu should be. Having the psu at the top of the case and using it as a exhaust fan was always a bad idea as the psu will run hotter, the fan louder and the extra heat could potentially shorten the life of the psu. Also, psu's are power/efficiency rated at a certain temperature. The Seasonic G series are rated at 50 degrees C so not so bad for them but others are rated at 40 degrees or even 30 degrees or less for the poorer quality ones. Exceeding those temps will affect efficiency and power delivery and in the case of cheap psu could even make them fail.

starmanwarz · 16 Oct 2019 at 16:08

pastymuncher said:
The bottom of the case with the psu drawing air through a filtered vent from outside the case is where the psu should be. Having the psu at the top of the case and using it as a exhaust fan was always a bad idea as the psu will run hotter, the fan louder and the extra heat could potentially shorten the life of the psu. Also, psu's are power/efficiency rated at a certain temperature. The Seasonic G series are rated at 50 degrees C so not so bad for them but others are rated at 40 degrees or even 30 degrees or less for the poorer quality ones. Exceeding those temps will affect efficiency and power delivery and in the case of cheap psu could even make them fail.

Ahh makes sense, thanks. And I wondered what that bottom boxed area is in the Fractal Design cases

pastymuncher · 16 Oct 2019 at 19:17

It's a really good idea having the psu in it's own compartment plus it makes cable tidying/hiding much easier too.