Is 850 Watts enough (and future proof) or should I go higher?

[DrMaestro]

Hi,

 

Planning on a new PC build. A Ryzen 5900x, with 64 Gb ram, 2 M.2, 2SSD, 2HDD drives, with a 1080Ti for now (will be upgraded to 3080/3090 if I can find at MSRP prices or will wait for next generation).  I used the PSU calculator (link: https://outervision.com/power-supply-calculator) to calculate power requirements (using 3090 as the GPU just to be sure). The reported wattage ise 679 Watts, the recommended wattage is 729 watts. According to these results, I was palnning on choosing a 850 watts model. Now, there is a 121 watts of headroom if I go with a 850 watts but this brings some questions to my mind:

 

1) Is it too close to the limits? As the PSU won't be 100% efficient, can 850 watts be too close?

2) If I skip this generation of GPUs and wait for next gen, is there a possibility that 850 watts won't be enough for powering the next gen? I know that this is purely speculative, as nothing is announced yet, but I wouldn't want to change a PSU in a few months aftrer building a new system.

3) So, in summary, which PSU should I choose?

 

Thanks...

[SirWendall]

What's the rating on said PSU?

[MultiGamerClub]

750w would be enough for a 30-series card, but knowing you want to have some more headroom

for spikes from the gpu and additional hardware and if you have enough for your budget i would advice the 850w.

 

1. 750w would be enough per say but i would advice the 850w if your budget can allow it.

2. I dont really think we will touch 450w power on gpu's any time soon. (This can bite me in the ass later!)

3. 850w if you can, 750 should be more than enough.

[Fasauceome]

850 watts is suitable if your goal is a 3090. 750 watts would certainly sustian a 3080 and/or 3090, and with how mild the 3070 is in comparison, that can be supplied by a 550 watt PSU (I've seen users comfortably running a ryzen 7 processor alongside a 3070 on a 500 watt PSU)

 

Outervision is known to be pretty unreliable, has a habit of overestimating. This figure you  got from the calculator seems less inaccurate that other numbers I've seen but overall the site isn't too useful.

[DrMaestro]

@Fasauceome Do you have a recommendation on which site to use? PC Part picker maybe? Edit: I used PC Part picker and the estimated power consumption is 663 Watts, so slightly less than Outervision, but the difference probably isn't that big to affect which PSU to choose.

@SirWendallI haven't decided on a model yet but should be 80 + Gold or Platinum

@MultiGamerClub I do have the budget for a 850W, do you have any recommendations?

[Fasauceome]

43 minutes ago, DrMaestro said:

Do you have a recommendation on which site to use? PC Part picker maybe? Edit: I used PC Part picker and the estimated power consumption is 663 Watts, so slightly less than Outervision, but the difference probably isn't that big to affect which PSU to choose.

I recommend against calculators of that nature, the only online calculator that I recommend is the ryzen dram calculator (but that's based on specs, not measurements, or lack thereof)

 

We do have a recommendation topic for you to look at

 

 

 

[DrMaestro]

@FasauceomeI've checked the thread you've menitoned. I believe my use case approximately matches the option with the 3090 scenario, where a 850 Watts+ Tier 1 PSU is recommended. From what I can find (in online local choices available to me) here are some options I can buy:

 

Asus ROG Thor 850 Watts 80+Platinum  (around 285 USD converted from local currency - listed in the best units for the Tier 1 (gold colored choice))

Asus ROG Strix 850 Watts 80+Gold (around 234 USD - listed in the blue group in Tier 1 (quite operation under moderate load)

Asus ROG Strix 1000G 1000 Watts 80+ Gold (around 270 USD - listed in the blue group in Tier 1)

 

Corsair HX850 850 Watts 80+ Platinum (around 223 USD - listed in the best units for the Tier 1 (gold colored choice))

Corsair HX1000 1000 Watts 80+ Platinum (around 296 USD - listed in the best units for the Tier 1 (gold colored choice))

 

beQuite Dark Power Pro 11 850 Watts 80+ Platinum (305 USD - listed in the best units for the Tier 1 (gold colored choice))

 

So, the cheapest 850 Watts option is Corsair HX850, which is a Platinum PSU an the cheapest 1000 Watts option is Asus ROG Strix 1000 (gold). The difference is 36 USD. To be fair, the price difference between units isn't huge, so things like silent operation (some PSUs mention fanless operation until 40% TDP), longevity, future-proofness, ease of installation are probably more important factors when deciding. Any particular model from that list that you'd recommend?

[Fasauceome]

46 minutes ago, DrMaestro said:

Any particular model from that list that you'd recommend?

The Corsair HX is great honestly, I've dealt with a few HX and AX PSUs and also the Corsair warrant program is spectacular, unlike Asus unfortunately.

[SirWendall]

I used nothing but EVGA PSUs, so I'm a bit biased

[GoldenLag]

20 hours ago, DrMaestro said:

Any particular model from that list that you'd recommend?

with the PSUs you have listed, the HX is by far the best. 

 

those ROG PSUs are very overpriced for what they are. 

[GamerDude]

I'm using a HX 1000 Platinum for my 3900X + RX 6900 XT rig, I know 850W would prolly be enough, but I'd always, ALWAYS, choose PSU's with extra headroom for a more powerful card (in the future) or for when I add more devices like HDDs/fans/AIO/etc.

[gal-m]

On 6/10/2021 at 10:50 PM, DrMaestro said:

Is it too close to the limits? As the PSU won't be 100% efficient, can 850 watts be too close?

Hey @DrMaestro.

A good quality 850W PSU will be okay. I'd recommend going for a 1000W PSU for a cooler and quieter experience. Up to you though.

On 6/10/2021 at 10:50 PM, DrMaestro said:

will be upgraded to 3080/3090 if I can find at MSRP prices or will wait for next generation

You won't find those GPU's at MSRP.

On 6/10/2021 at 10:50 PM, DrMaestro said:

If I skip this generation of GPUs and wait for next gen, is there a possibility that 850 watts won't be enough for powering the next gen? I know that this is purely speculative, as nothing is announced yet, but I wouldn't want to change a PSU in a few months aftrer building a new system.

Could be, but I doubt it.

On 6/10/2021 at 10:50 PM, DrMaestro said:

So, in summary, which PSU should I choose?

850W is okay. I'd go with a 1000W unit for good measure.

[freeagent]

Just throwing this out there..

 

5900X @ full load running 10GB passes of Linpack Xtreme will pull 370w @ the wall. That is shortly after watching it pull just under 70w idle.

 

Granted, a game is not Linpack. But if you were curious how thirsty that CPU can be, now you know. 105w is just something they put on the box. Its much more than that. Kinda like how my 65w 5600X can pull more than double that 65w 

[DrMaestro]

I've ordered the HX 1000. Thanks for all the inputs and contributions....

[Guest]

6 hours ago, DrMaestro said:

I've ordered the HX 1000. Thanks for all the inputs and contributions....

That'll be perfect for when the RTX 4000 series cards come out next year.

 

[GamerDude]

12 hours ago, jonnyGURU said:

That'll be perfect for when the RTX 4000 series cards come out next year.

 

Let's not forget the 7900 XT from AMD, GPU's not only about RTX/nVidia ya know.