Running 4070 ti on a 450 watt Corsair PSU

[Parvesh Khatri]

Hi, I just bought a 4070 ti so I can do more in Bender and faster. I was using UHD630 and an i5 8400 on a gigabyte b365 gamming M.

I'll still be using the same board and processor, but use a 4070 ti to render quickly.

The problem is that I only have a 450-watt PSU. Some say a 4070 ti need more than 650-watt PSU. But its power draw is less than 300 watts. The i5 8400 eats 65-watt max I think.

So, should I run the 4070 ti with the 450-watt PSU?

 

 

 

Budget (including currency): 

Country: 

Games, programs or workloads that it will be used for: Blender and Unreal Engine

Other details (existing parts lists, whether any peripherals are needed, what you're upgrading from, when you're going to buy, what resolution and refresh rate you want to play at, etc): 

 

[SpookyCitrus]

I absolutely would NOT use a 450w PSU with a 4070ti.

[UnknownWalls]

Also cpu bottleneck

[rippy4500]

You could technically use it but you would have to heavily power limit it, I wouldnt recommend using it at 100% power limit unless you upgraded to a 650w unit or better.

 

Limit it to maybe 60% (it would be 170w of 4070 tis 285w tdp)

[rippy4500]

15 minutes ago, UnknownWalls said:

Also cpu bottleneck

In gaming maybe, but hes using blender which is much different.

[UnknownWalls]

Just now, rippy4500 said:

In gaming maybe, but hes using blender which is much different.

 

1 minute ago, rippy4500 said:

In gaming maybe, but hes using blender which is much different.

Fair

[johnt]

I wouldn’t worry about it. The 8400 isn’t a hungry chip. You should have enough to power a gpu. and if not, your PC will turn off. After the second or third shut down during a heavy load, you will know if 450w is sufficient. You won’t hurt anything by trying in this situation. 

[AndreiArgeanu]

The GPU eats about 290 watts under a load like furmark. You could maybe get away with it, but at the same time you'd be pushing your power supply, besides that, there could be power spikes that could further push it, especially if it's an older power supply . A 4070 ti is 800$, you really can't spare 60-80$ to get a decent power supply to support it?

[Crunchy Dragon]

32 minutes ago, Parvesh Khatri said:

The problem is that I only have a 450-watt PSU. Some say a 4070 ti need more than 650-watt PSU. But its power draw is less than 300 watts. The i5 8400 eats 65-watt max I think.

So, should I run the 4070 ti with the 450-watt PSU?

You need to account for everything else in your PC that draws power. Motherboard, RAM, SSDs, hard drives, LEDs, fans, USB devices, all of it. If anything is overclocked at all, that will draw even more power.

 

With that said, you can install a 4070Ti into that system and it will work for a little bit, but you should absolutely expect your PC to shut down if you throw any half-serious load on that GPU.

[brob]

37 minutes ago, Parvesh Khatri said:

The i5 8400 eats 65-watt max I think.

 

Actually the 65W is it's thermal output rating, not the actual power consumption.

 

Don't forget memory and storage. A basic system with the CPU, GPU, 2 sticks of memory, and one SSD is up to 488W.

 

There is a real risk overloading some PSU. I would not risk doing so unless I was sure the PSU had modern protections, particularly OCP.

[Parvesh Khatri]

11 minutes ago, Crunchy Dragon said:

You need to account for everything else in your PC that draws power. Motherboard, RAM, SSDs, hard drives, LEDs, fans, USB devices, all of it. If anything is overclocked at all, that will draw even more power.

 

With that said, you can install a 4070Ti into that system and it will work for a little bit, but you should absolutely expect your PC to shut down if you throw any half-serious load on that GPU.

Got everything you said, please suggest what number should be good for my requirements

[SorryBella]

4 minutes ago, Parvesh Khatri said:

Got everything you said, please suggest what number should be good for my requirements

What nvidia mentioned is solid recommendation even on high end CPUs, 650-750W. Make sure that you get a solidly build PSU, a lot of PSU makers and ODMs are a bunch of liars that make a PSU that could deliver 650-750W, but not reliably. Check out PSU Tier List by cultists.network, anything B and above is a solid recommendation, with 5-15 year full replacement warranty range being preferable.