What PSU size would I need ?

2013

2013

2013

Soldato
Joined
29 Dec 2012
Posts
4,224
I'm looking for a little advice

I have a XFX 850w PSU (dont know the model) that ive had few years old now, don't really have any plans to replace it yet, its been working fine no issues (dont know how I would notice if it had ) and feel a good PSU should last years but you never know.

I don't know what size PSU I need ? so I would like to get a idea of what I would need.

My pc spec
CPU - AMD Ryzen 5800x with noctua u12s
Mobo - ASUS ROG CROSSHAIR VI HERO (WI-FI AC)
GPU - 580x 8gb - I will hopefully upgrade to a (RX 6600 or something) once I have some fund spare
RAM - TEAMGROUP T-Force Dark Pro 16gb
SSD - Nvme - 1TB Samsung 980 / 250gb SSD
HDD - 3 large backup hdds
PSU - XFX 850w
Fans - 10 fans
 
I have looked into this and for my own build and you should really look at reviews for the GPU model you are going to go for and the CPU model you have. In those reviews there are typically sections with power consumption. For the 6600 it looks like it uses 123w but in the review I saw there was a spike of 249w. With the 5800x I could find power consumption of 190w. Those would be your most power hungry components which comes to 439w.

Ideally for me personally and from what I have seen on the internet it is a good rule of thumb just to get a bit extra on your PSU just in case of spikes and such so 850w is probably plenty unless you ever want to change your GPU choice, however if you ever do want to upgrade to a different more power hungry GPU as we have the recent trend of GPU power consumption going a bit bonkers lately then I would definitely do some research and look at reviews at hte GPU that you want to see whta the power consumption is like.

It might be overkill to have 850w in your situation but at the very least any spikes in consumption that is out of the ordinary will not affect you, looking at it though you power consumption would be around 313w not counting the rest of your components which I believe ais incredibly neglible as they don't consume anywhere near the same amount of power as your PSU or GPU. I could be wrong on that don't quote me on it but I believe that is correct which is why I normally look at the CPU and GPU first then leave a bit extra for the rest of the components.

I hope this helps.
 
Thanks, I found similar infomation when looking online,
Pc part picker suggest 494w for my spec pc but other place have suggested higher.
reviews suggest going a little high due to spikes like you suggested.
 
Last edited:
Honestly I'd say you'll likely be fine with the 850w you have now if it's still in good health, not too old etc.

For reference my 5950x and a 1060 6gb which supposedly pulls around 125w, along with 2nvme, 6sata ssd and 4 sticks of ram, hasn't broken 500w at the mains according to the power meter thing I have plugged in right now.
 
Thanks. sticking with what I have and change when I need it.
going by the info I've see, I assuming I would been a 650w - 750w PSU in the future when I need a new psu ?
 
Last edited:
2013 said:
Thanks. sticking with what I have and change when I need it.
going by the info I've see, I assuming I would been a 650w - 750w PSU in the future when I need a new psu ?
Click to expand...
I'd probably stick with another 850w if you swap out in the future (make sure good efficiency rating), gives a little wiggle room if you decide to upgrade anything.
 
2013 said:
Thanks. sticking with what I have and change when I need it.
going by the info I've see, I assuming I would been a 650w - 750w PSU in the future when I need a new psu ?
Click to expand...

It would be plenty enough for a 5800X and RX 6600 / 6700 non-XT (or equivalent), but as suggested above, 850 would give you that extra level of confidence (if one day you found a high-end card to your liking).

As @Shingyboy said, the actual power consumption of this stuff is generally quite modest, at least, compared to worst case CPU/GPU benchmarks (e.g. a 5800X doesn't use 150 watt playing a game, games are not Prime 95), but you do need some headroom for spikes. I think ATX 3.0 PSUs are supposed to have fixed the need for over-spec psu (at least, according to the marketing).
 
Last edited:
You must log in or register to reply here.
Back
Top Bottom