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The RTX 3000 cards and power supply requirements

The official webpage says recommend is 750w but depending on your PSU it could be fine. Best thing to do is maybe contact EVGA or wait for reviews to reviews the cards first.

If it's a good PSU then it probably will be fine as long as you dont have 101 other devices drawing power from it as well or a heavily overclocked system.

Also depends what the rest of your specs are.
 
opethdisciple said:
The official webpage says recommend is 750w but depending on your PSU it could be fine. Best thing to do is maybe contact EVGA or wait for reviews to reviews the cards first.

If it's a good PSU then it probably will be fine as long as you dont have 101 other devices drawing power from it as well or a heavily overclocked system.

Also depends what the rest of your specs are.
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I have a Ryzen 3600, 16GB Corsair RAM, 1TB Sabrent NVME SSD, 250gb Samsung 840 EVO SSD, 2TB WD Blue HDD. Peripherals include a wireless G915 keyboard and a wireless Logitech mouse.
 
OZONE said:
I have a Ryzen 3600, 16GB Corsair RAM, 1TB Sabrent NVME SSD, 250gb Samsung 840 EVO SSD, 2TB WD Blue HDD. Peripherals include a wireless G915 keyboard and a wireless Logitech mouse.
Click to expand...

My guess is you're probably be OK, as long as the PSU is a good one.

But it's a guess.

Also I'm sure once the cards release and people have them in hand, others with 650w PSU will be able to tell you how they get on.
 
opethdisciple said:
My guess is you're probably be OK, as long as the PSU is a good one.

But it's a guess.

Also I'm sure once the cards release and people have them in hand, others with 650w PSU will be able to tell you how they get on.
Click to expand...
What kind of problems would one run into if the PSU isn't sufficient for the GPU?
 
I think you'll be fine. Your 3600 CPU doesn't use a lot of wattage really compared with Intel's under-load and you mostly have NVME and SSD drives which aren't power hungry.
 
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They still only use 2x 8 pin power connectors, so at worst the most a GPU can pull is 375W (2x 150W + 75Watt from the Slot)

That still leaves 275W which will be plenty in most cases (unless you've got lots of drives and running a particularly power hungry chip/overclock)
 
I have the same PSU only the 750W variant. I think you should be fine for the 3070 model and I should be fine for the 3080 or 3090 :)
 
Just to play devils advocate here. There is a lot of "I think" going on. Now to me, if the official source says you need a PSU of xyz then they must be saying it for a good reason. Now imagine, not that I'd want this to happen, but you have an issue with the GPU. Not sure what it is so you contact support. They turn around, enquire about your rig and you mention the 650w PSU. They could potentially just say we're not helping until you. Probably not that bluntly. We get it at work with support from manufactures, they won't help until you patch up to their latest version of software. Then they offer the support. Potentially something similar may occur here... if it wasn't important then why mention it.
 
Headroom also is healthy. I double spec my psu so it runs at 50% load. That makes it feel safer and surely efficency too.
 
According to a psu calculator my system with a 3080 will draw a max of 540w under full load on everything, so I'm sticking with my high end 650w for now.
 
Rofflay said:
Headroom also is healthy. I double spec my psu so it runs at 50% load. That makes it feel safer and surely efficency too.
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Around 50% tends to be peak efficiency. Higher loads are less efficienct but still good right up to the load rating. Lower than 50% tends to fall off very quickly into extremely poor efficiency. So it probably isn't best to overspec PSUs unless you run your pc at 100% load all the time, and even then only buy one rated for double your max power draw.
 
OZONE said:
I am currently rocking a 650W EVGA G2 (https://www.jonnyguru.com/blog/2015/06/12/evga-supernova-650-g2-power-supply/)

The official NVIDIA website states a 750W PSU is required for the RTX 3080 or 3090.

Is my current power supply now obsolete? If yes, what is the consensus for a high quality 750W power supply?
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A good psu has a good ampere and low ripple to handle spikes aka power draws and ensure stability.
so your 650w quality psu will be fine with current set up.
Many places in the world sells psu which will burn up when pushed a bit.
its why they usually add a lot more to the recommendation to account for people buying crap psu´s
 
new boy said:
Around 50% tends to be peak efficiency. Higher loads are less efficienct but still good right up to the load rating. Lower than 50% tends to fall off very quickly into extremely poor efficiency. So it probably isn't best to overspec PSUs unless you run your pc at 100% load all the time, and even then only buy one rated for double your max power draw.
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The fan will come on on the AX860i as well which is another reason for half spec but i thought lower loads would be better thats downright weird. Thats what i use 850-1000w if i seen one at the good price (£136 for Ax860i) i would still get one but you would think it performs best at lower usages. It makes no sense and i did not know this so thanks.
 
RBImGuy said:
A good psu has a good ampere and low ripple to handle spikes aka power draws and ensure stability.
so your 650w quality psu will be fine with current set up.
Many places in the world sells psu which will burn up when pushed a bit.
its why they usually add a lot more to the recommendation to account for people buying crap psu´s
Click to expand...
Fair enough. I guess I'll keep my current setup then. I'm no expert on PSUs, although my unit seems to be reviewed very well across all websites, so I hope I am safe. Certainly do not want to spend another £100+ on a PSU!
 
My PSU is a 600W.... I bet I could get away with it (3700x and a 3080). But to be honest my PSU has served me for about 7 years now. So probably no harm in getting a wee upgrade.
 
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