Which GPU

[MyNameIHappy]

Hi there I wanne upgrade my current system to a 3080ti.

AMD Ryzen 7 3800x OC to 4.6GHz

RTX 2070 Evga

2x 8GB 3200MHz 2x 8GB 2666MHz OC to 3000MHz (bought one wrong kit with lower frequenzy :D)

M.2. 512GB/1020GB PCIe 3.0

Lian Li GAHLAD 240SL

6x 120 Lian Li Uni Fan SL

2x Corsair FAN without RGB

Corsair sfx 750

 

I calculated my power usage with help of the bequiet website and tried some scenarios where I also upgraded my CPU to a 5700x and tried a 3070ti instead of a 3080. My question is as u can see the max power usage is a bit higher then my power supply and im running a  sfx power supply and I cant fit a atx powersupply in my PC case. So far 750 was the biggest i could found and i kinda don't wanne redo my cable managment again. If I would upgrade to a 5700x it would work with ease but i don't really wanne upgrade the CPU as he is still working perfectly fine. Also I'm planning to upgrade my 512Gb M.2. to a PCIe 4.0 for my OS and upgrade my RAM kit to a 3600MHz in later stages. Do you thing it would still work without a problem?

I planned to upgrade to a 3080ti vison OC ediition from Gigabyte or Aorus Xtreme.

 

PS: i frequently use my usb ports for chargin my controller and use the Elgato go XLR

[PDifolco]

Mmm, why do you use a SFX PSU if you have an ATX case ? 

They're more expensive and are much more prone to trip over 3080 levels of power spikes...

Overall though it will work, but you risk shutdowns not because of the total "average" "power requirement but on sudden GPU spikes that the SFX PSU may not handle.

If you insist on keeping it then I'd say use a 3080 or 3070Ti (so in the 300W max range), then with the saved money get 2x16GB 3600CL16 sticks, which by themselves will give your CPU a nice boost (3600MT to 3000 that's +20%, maybe better latency, and less load on the memory controller with 2 sticks i/o 4)

 

[NunoLava1998]

23 minutes ago, PDifolco said:

They're more expensive and are much more prone to trip over 3080 levels of power spikes...

Overall though it will work, but you risk shutdowns not because of the total "average" "power requirement but on sudden GPU spikes that the SFX PSU may not handle.

What? It's an SF750, it's one of the highest quality power supplies out there. It can absolutely handle power spikes.

[PDifolco]

7 minutes ago, NunoLava1998 said:

What? It's an SF750, it's one of the highest quality power supplies out there. It can absolutely handle power spikes.

It may be, but it's still SFX, smaller and then less electrically safe

Watch this :

 

 

[NunoLava1998]

7 minutes ago, PDifolco said:

It may be, but it's still SFX, smaller and then less electrically safe.

The video you showed only says that SFX power supplies don't have as much room, which could potentially hamper their ability to handle power spikes. It means that SFX power supplies in general are more likely to be affected by them, but not that all of them are.

The Corsair SF series are one of the highest quality power supplies on the market; they can handle spikes as well as any other high quality 750W power supply.

[DoctorNick]

If you alrady got the PSU I see no reason not to use it. You could buy the adaptor bracket for ATX if you use it in a ATX case.

[MyNameIHappy]

Ty for all the helpfull answers. i forgot to mention that i use the Lian Li o11 mini so there is not room for an atx powersupply. As far as i know the case doesn't officially support atx mainboards. Since the new AMD finally got introduced i will not upgrade to an AMD 7 5700X since its not worth it. But i will consider the 3070ti more since i wanne place some monitors in my case and mybe do some more OC where 750W may be a problem in the future.

[varrys]

You could always lower the voltage on your GPU to save on max power draw (and temps). I have a 3080 and a 5600x on a 750W PSU, and though wasn't overly worried about power spikes, I wanted to reduce temps overall. Setting a lower voltage curve dropped temp and power consumption.