ewoxx
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Nvidia and pretty much every AIB recommends a 650W PSU for the RTX 2080. However it's a 215W TDP card and in comparison the 1080 Ti, TitanV and TitanXp are 250W TDP cards and have only a 600W PSU recommendation. In this light, the 650W recommendation for the 2080 seems odd.
I have a good quality 550W PSU and am starting to wonder if it really is a bad idea to be running the RTX 2080 off of that.
Any enlightened input?
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RainStryke
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Re: Why the 650W PSU recommendation for 215W TPD RTX 2080?
2018/08/26 07:10:26
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While most good quality PSUs that are gold standard or higher could easily support a RTX 2080 with even a solid platinum cert 500w. They have to account for those newer to building that attempt to skimp on the PSU and try the same with a non certified PSU. Also, the PSU side of things has turned around in the last 5 years or so... where we are now seeing under rated PSUs rather than grossly over rated ones that will die out in 2 years cause they are hardly able to support 50% load.
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chumeniuk
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Re: Why the 650W PSU recommendation for 215W TPD RTX 2080?
2018/08/26 10:09:20
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I always found it odd that GPU's recommend a certain size power supply since there are many variables involved. I could see a conservative guess of CPU 100w + MB 100w + GPU 250w = 450w. A 550w @ 90% = 495w limit which should cover you. I know in gaming on my Ryzen 2700x and SLI 1080 Ti's I don't see over 650w being drawn out of the wall using a Kill-A-Watt meter.
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Hurikane71
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Re: Why the 650W PSU recommendation for 215W TPD RTX 2080?
2018/08/26 10:52:16
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This is why I always use a 750w PSU for all my builds. I always go gold rated and use EVGA G2/G3 as they are generally around $100 to $110. I would rather go overkill then barely get by or have not enough. IIRC PSU run at their most efficient around 50% to 70% useage range. Also heard mentioned once you OC the 2080 it goes from 215W to 280W+. So there is that. Best of luck to you and I would use one of those system power useage calculator things and see if you can squaek by.
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GTXJackBauer
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Re: Why the 650W PSU recommendation for 215W TPD RTX 2080?
2018/08/26 11:22:16
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The recommendations are at the min imo. I don't like going over 70% of constant load on a PSU.
Also, the PSU is what powers everything so never skimp quality and always purchase one from a reputed company.
My personal preference are Seasonic (#1 PSU's imho) and Corsair coming in at second.
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ewoxx
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Re: Why the 650W PSU recommendation for 215W TPD RTX 2080?
2018/08/26 11:24:38
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Hurikane71Best of luck to you and I would use one of those system power useage calculator things and see if you can squaek by. Yea, hoping EVGA updates the 20-series into their power calculator soon!
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rjohnson11
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Re: Why the 650W PSU recommendation for 215W TPD RTX 2080?
2018/08/26 11:34:08
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I would want a beefy PSU in a system such as Threadripper and an RTX 2080. The higher the better. PSUs tend to be priced reasonably so going a little higher won't break the bank. Right now for example this PSU (850 watts) has a 60 dollar instant rebate so $89.99 is a great deal: https://www.evga.com/products/product.aspx?pn=120-GP-0850-X1
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Sajin
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Re: Why the 650W PSU recommendation for 215W TPD RTX 2080?
2018/08/26 14:05:30
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Just use this calculator to figure out what you need.
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d.burnette
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Re: Why the 650W PSU recommendation for 215W TPD RTX 2080?
2018/08/26 14:08:29
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I have always been of the "better to have too much than too little" variety. Been running a 1000w in this system I built in 2013, will likely get a new PSU anyway though for the new system I plan on building a little later on in the year.
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Johnny_Utah
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Re: Why the 650W PSU recommendation for 215W TPD RTX 2080?
2018/08/26 14:32:04
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d.burnette
I have always been of the "better to have too much than too little" variety. Been running a 1000w in this system I built in 2013, will likely get a new PSU anyway though for the new system I plan on building a little later on in the year.
Agreed.
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gutcheck
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Re: Why the 650W PSU recommendation for 215W TPD RTX 2080?
2018/08/26 15:13:04
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After popping a PSU a few years back I always go overkill. I’d find a nice 650-750 unit the price difference isn’t that bad.
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Ranmacanada
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Re: Why the 650W PSU recommendation for 215W TPD RTX 2080?
2018/08/29 19:57:04
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TDP has less to do with power draw and more to do with thermals. These cards give off 215 watts of heat, so at minimum they need to take in at least 215 watts of power to produce that much heat (the whole conservation of energy thing). And that's only if the power supply is 100% efficient.
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EVGA_Lee
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Re: Why the 650W PSU recommendation for 215W TPD RTX 2080?
2018/08/30 10:12:45
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ewoxx
Nvidia and pretty much every AIB recommends a 650W PSU for the RTX 2080. However it's a 215W TDP card and in comparison the 1080 Ti, TitanV and TitanXp are 250W TDP cards and have only a 600W PSU recommendation. In this light, the 650W recommendation for the 2080 seems odd.
I have a good quality 550W PSU and am starting to wonder if it really is a bad idea to be running the RTX 2080 off of that.
Any enlightened input?
On the one level, it's actually a simple question to answer. NVIDIA lists the minimum recommendation at 650W, so we, and other partners, also list the cards at 650W minimum PSU recommendation. In practice, as others have noted, there are many other factors to take into account. NVIDIA also now does this, by noting that pre-built systems may not need as large of a power supply. Ultimately, your system components will ultimately determine if you need more than 650W, or possibly less....
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