MY PSU is 50w short of the recommended spec, should I still go ahead?

[SoloSoldier]

I'm upgrading from an RX 570 to 3070Ti, and according to the newegg PSU calculator, I should be fine as I have a 700W PSU. But the GPU manufacturer's recommendation is a 750W PSU. 

 

The deal I'm getting is a 3070Ti cheaper than a 3070 where I'm living. The PSU I am using is Thermaltake Smart RGB 700W.

 

Is it better to spend a little extra and be safe with the 3070 or am I okay with getting the 3070Ti?

 

 

Thanks!

[blodfighter]

you could try to underclock the cpu and gpu, but i dont know if i can recommend it since it might be unstable.

but if you have a old psu laying around its possible to use one for the gpu and the other for the rest of the pc, its kinda janky but should work just fine after connecting it right (connecting some specific pins on the 24 pin connector together so both psu's turn on when hitting the power button)

you might even be able to get one for cheap if you know someone who has an old one they dont want but wanting to throw it out 

[SoloSoldier]

7 minutes ago, blodfighter said:

but if you have a old psu laying around its possible to use one for the gpu and the other for the rest of the pc

I can't imagine that being healthy-what if my PC shuts down while the GPU is still powered? Sounds like something bad might happen to the motherboard?

[Blue4130]

1 hour ago, SoloSoldier said:

I'm upgrading from an RX 570 to 3070Ti, and according to the newegg PSU calculator, I should be fine as I have a 700W PSU. But the GPU manufacturer's recommendation is a 750W PSU. 

 

The deal I'm getting is a 3070Ti cheaper than a 3070 where I'm living. The PSU I am using is Thermaltake Smart RGB 700W.

 

Is it better to spend a little extra and be safe with the 3070 or am I okay with getting the 3070Ti?

 

 

Thanks!

 

If you read the fine print on the nvidia website, it shows what they base the recommended specs on. In this case specifically, a 10900K system.

 

 

A 10900K uses 250W under load. Your 5700G uses 150w. You are fine with what you have.

[blodfighter]

if those pins are connected to each other they will always turn on and off at the same time. the way the psu knows if it should be on or off is if 2 specific pins on the 24 connector is shorted/connected or not. is you want an example of it ltt did it in one of the first scrapyard wars.

the gpu does not share its 4/6/8 pin power with the motherboard so no issues there, and i dont think giving the gpu power via the 4/6/8 pin connector without the computer being on would do anything to any of the components, though it would waste whatever power a psu use from just being on. you should be carefull to connect the right pins between the 24 pin connectors since sending the wrong voltage down some of the lines could and would break something

 

found the ltt video 

 

[blodfighter]

theres even a thing you can buy that does the thing without you having to wire things youself

[blodfighter]

31 minutes ago, Blue4130 said:

If you read the fine print on the nvidia website, it shows what they base the recommended specs on. In this case specifically, a 10900K system.

 

 

A 10900K uses 250W under load. Your 5700G uses 150w. You are fine with what you have.

the 3070 ti have a peak power spike of up to 380w by itself, nvidia recommends a 750w but at minimum 650w. the new cards spiky behavior can also be quite demanding for psu's that are running above its sweetspot, if its a good quality psu without some weakness from either wear and tear or hidden manifacture defect it should be fine. but at the same time if youre one of the unlucky few which psu broke it can take basically anything its connected to with it.

i think my final thought is it will probaply be fine, but should not be run outside spec wich amd's precision boost can also do depending on how you set it up. 

im not one to talk though im running a 3070 and a ryzen 3600 on a 650w wich is also is barely inside recommended specs

im just a little risk averse when recommending it to others

[Somerandomtechyboi]

1 hour ago, SoloSoldier said:

Thermaltake Smart RGB 700W

Spl tierlist indicates d tier if you are curious about where it falls in a decent psu tierlist, in word form it means psu is probably not gonna run 3080s or gpus with ludicrous transients smth like that but else youll be fine assuming it fits in the psus capacity say 6950xts

 

Also 54a 12v rail so real wattage of 648w not 700w as advertised but thats a moot point for a cpu that is unlikely to draw over 120w and a sub 300w gpu

 

To sum it up youll almost certainly be fine though if you encounter random shutdowns undervolting the gpu should fix it, zero risk in overpowering the psu as the protections should kick in (manifests as those random shutdowns)

[blodfighter]

12 minutes ago, Somerandomtechyboi said:

Spl tierlist indicates d tier if you are curious about where it falls in a decent psu tierlist, in word form it means psu is probably not gonna run 3080s or gpus with ludicrous transients smth like that but else youll be fine assuming it fits in the psus capacity say 6950xts

 

Also 54a 12v rail so real wattage of 648w not 700w as advertised but thats a moot point for a cpu that is unlikely to draw over 120w and a sub 300w gpu

 

To sum it up youll almost certainly be fine though if you encounter random shutdowns undervolting the gpu should fix it, zero risk in overpowering the psu as the protections should kick in (manifests as those random shutdowns)

there have been issues where the 3000 series caused psu's to break in a magic smoke kind of way(sorry lacks the right words) because of the sudden and powerfull power spikes, my gues is that it overloaded it faster than its protections was built to respond too. 

 

but i do totally agree that its not likely to happen. its maybe not even worth thinking about but i simply dont know what the actual chances are and would rather cover my ass so i wont feel responsible if anything happens.

Edited June 22 by blodfighter
i know that i sometimes gets misunderstood as disagreeing when im not actually in the grand scheme of things

[Somerandomtechyboi]

44 minutes ago, blodfighter said:

there have been issues where the 3000 series caused psu's to break in a magic smoke kind of way(sorry lacks the right words) because of the sudden and powerfull power spikes, my gues is that it overloaded it faster than its protections was built to respond too. 

 

but i do totally agree that its not likely to happen. its maybe not even worth thinking about but i simply dont know what the actual chances are and would rather cover my ass so i wont feel responsible if anything happens.

I personally dont consider it as most failiures shouldnt be catastrophic if a failiure even occurs (almost never does) and i presume theres probably some sort of fuse to stop it from ever going into catastrophic failiure

 

But fair enough if you want to err on the side of caution theres nothing that really justifies running a meh unit whe  you can find quality used psus like the rm850x or equivalent for 50$ and probably less depending on luck

[SoloSoldier]

27 minutes ago, Somerandomtechyboi said:

I personally dont consider it as most failiures shouldnt be catastrophic if a failiure even occurs (almost never does) and i presume theres probably some sort of fuse to stop it from ever going into catastrophic failiure

Yeesh, that still sounds scary to me. Hardware is already expensive enough as it is here.

[SoloSoldier]

1 hour ago, Somerandomtechyboi said:

Spl tierlist indicates d tier if you are curious about where it falls in a decent psu tierlist, in word form it means psu is probably not gonna run 3080s or gpus with ludicrous transients smth like that but else youll be fine assuming it fits in the psus capacity say 6950xts

 

Also 54a 12v rail so real wattage of 648w not 700w as advertised but thats a moot point for a cpu that is unlikely to draw over 120w and a sub 300w gpu

 

To sum it up youll almost certainly be fine though if you encounter random shutdowns undervolting the gpu should fix it, zero risk in overpowering the psu as the protections should kick in (manifests as those random shutdowns)

But yes, you're right, I didn't consider the CPU's lower power draw. Let me have a look at the documentation again and see what the recommendation is based on.

[blodfighter]

but yeah if you want to be safe undervolting can generally be done while keeping stock clocks, wich will also make it run cooler.

and then you can alsways look for a psu upgrade as the next purchase to unlock the power headroom for overclocking and the ability to upgrade it to more powerfull hardware down the line

undervolting will also have longevity benifits for the hardware though it often lasts for quite a while even when running outside of spec