VR Build - i5 9400 good enough? 600w PSU for 3080 Ti?

[Pancake]

My HTPC has the following

 

• Intel Core i5 9400
• ASRock Z370M-ITX/ac
• Corsair Vengeance LPX 16GB (2x8GB) DDR4 3200MHz
• Noctua NH-U12S w/ Noctua NF-F12 PWM
• GIGABYTE GeForce RTX 3080 Ti 12GB (On its way)
• be quiet! Pure Power 11 600W Power Supply
• Fractal Design Meshify C TG ATX (On its way)

 

Questions on this. Is the 600w PSU good enough for a 3080 Ti? My desktop which has a 2080 SUPER has a Phanteks AMP Series 750W 80 PLUS Gold. Should I swap the two around?

 

Is the i5 9400 good enough for this build? It was cheap and since this was just a basic HTPC, it didn't matter. I do however have an 8700K in my NVR (Blue Iris) and I could swap the two around. Should I swap this, or is the CPU not going to be an issue?

 

Yes, I am aware the ITX board in an ATX case is going to be really weird looking. This is currently in a Phanteks Enthoo Evolv ITX which can't fit the GPU, and has terrible airflow

 

Thanks!

[ZetZet]

Normally I'd say 600W would probably be enough, but in your particular case there is very little chance that it handles the load, because your PSU is dual rail. 

[Pancake]

1 minute ago, ZetZet said:

Normally I'd say 600W would probably be enough, but in your particular case there is very little chance that it handles the load, because your PSU is dual rail. 

Thanks, so the Phanteks AMP Series 750W is a better bet?

[ZetZet]

2 minutes ago, Pancake said:

Thanks, so the Phanteks AMP Series 750W is a better bet?

Definitely. That one is single rail and more watts.

[Pancake]

Just now, ZetZet said:

Definitely. That one is single rail and more watts.

Thanks! I had no idea that being dual rail was an issue

 

I assume there should be no issue with the 600w running a RYZEN 7 3700X with a 2080 SUPER? I also have a spare older Corsair HX650 sitting in a box, if that would be a better PSU too

[ZetZet]

Just now, Pancake said:

Thanks! I had no idea that being dual rail was an issue

 

I assume there should be no issue with the 600w running a RYZEN 7 3700X with a 2080 SUPER? I also have a spare older Corsair HX650 sitting in a box, if that would be a better PSU too

I don't know how much of an issue it would be, but one rail couldn't handle the load and I'm not sure plugging in both separate rails into one GPU is smart. Definitely would not be something I would be comfortable in recommending. 600W for the 3700X and 2080 SUPER should be perfectly fine. 

 

 

[Pancake]

Actually, think the Corsair HX650 would be alright for the 3080 Ti? It would be MUCH easier to not have to rip apart my PC!

[ZetZet]

1 minute ago, Pancake said:

Actually, think the Corsair HX650 would be alright for the 3080 Ti? It would be MUCH easier to not have to rip apart my PC!

It will be. The i5 doesn't use much. 

[Pancake]

Thanks for your advice, got the PSU swapped ready for the new case to arrive

 

Since the 600w has 2 rails, does it matter which PCI-E Power connector I use? It has 2 cables each with 2 x 8 Pins, one labeled GPU1 and the other GPU2. Doesn't seem to be anything on the box or in the book about which goes to which rail

 

Also, for the 3080 Ti on the 750w, it alright to use the daisy chained 8 pins? It requires 2 x 8 Pins. Or should I run 2 cables down from the PSU?

[woahthatscool]

for your cpu, i would recommend your get a intel core i7 or i9 for a VR build. 3080ti is good for vr but i think also get a 80+ gold 750 or 800 watt psu. 

[Pancake]

I swapped in the 8700K, and then I will keep my eye out for good deals on a board and CPU

 

Its an ITX board currently, so its going to look WILD with the 3080ti in there

 

The 750w will be in this system, if UPS will ever show up

[Pancake]

Answer from bequite is that I should spread the GPU across the 2 rails by using 1 connector for GPU1 and another for GPU2

 

For the 750w, I am going to use 2 cables. It looks like a single cable isn't really rated for the load of a 3080 Ti