Re: 3080 FTW3: What SFX PSU will work? 2x 8 Pins instead of 3x 8 Pins possible?
2021/07/03 06:08:48
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Max Silencio
Thank you for you very detailed answer and your kind offer.
The hint with the PCIE 8 Pin to Dual 8 (6+2) Pin-adaptor is fine. Would be great if a EVGA Tech could confirm the use of that splitter. I'm not sure.
My i7-7700K is delidded and my whole system incl. 1080Ti just consumes about 180W while gaming @75FPS max.
Actually I prefer the 3080 XC3 over the FTW3 but this card is very rare to get here. Smaller, lighter, more compact, more puristic (not to mention the red design flaw) and only 2 connectors.
I've seen this wattage graphs. So exactly 200 Watt plus is the price.
Besides I've some 1000W+ PSUs in the basement but they don't fit into my mini-itx.
I've made up my mind already and will go the easy under-clocking route for SF750.
Waiting for my RTX3080 FTW3 which hopefully will not be canceled and arrives next week.
Gotcha, I think if you use the 750 you'll be fine even with mild OC'ing...I only hit 700W on my system in my signature now with a light OC and it's a power hog. As far as the splitter you'd need to ask the PSU manufacturer most likely, the reason they don't recommend them is because many PSU's split power between rails (so each cable has separate power allocated) so using everything on 1 cable won't allow you to use your full power potential but since you lack additional plugs then a splitter is your only option in that case. Many PSU's even come with "pigtail" setups* instead of single-end cables where each PCIE power cable comes with 2 connectors to daisy chain them and I've used these up to a 3070 Ti in systems where there were no other option and it worked fine. The worst case scenario is the system shuts down, the card doesn't get enough power and downclocks, or the system won't boot...insufficient power won't kill the card or anything. There's a discussion I saw about this recently
here (Thread titled "is it safe to split a 8pin PCIe into 2 8pin PCIe?") if you're interested. Also, as far as the bigger PSU's not fitting in your case I expected that, I was just recommending you run the cables for them into the case (with the PSU outside the case as shown below**) and start the system long enough to measure your power consumption, then if it's under 600W you can swap to that PSU instead if you're worried about overloading that PSU. In any case, glad I was able to provide some help and let me know if I can help with anything else...good luck!
*
** Like this:
System Specifications:
CPU: AMD Ryzen 9 5950x
Motherboard: MSI MEG X570 Unify
RAM: 32GB G.Skill Trident RGB PC4000 16-16-16-36
GPU: eVGA RTX 3090 K|ngp|n Hybrid W/ 120mm Noctua iPPC 2000 RPM Industrial Fans (Undervolted, No OC Yet)
Case: Corsair 4000D W/ a 120mm Noctua iPPC 2000 RPM Industrial Fan in the Only Spot Without a Radiator
Storage: Samsung 980 Pro 2TB (Boot) + Samsung 970 Evo 1TB x 2 (RAID-0) + 8TB RAID-1 NAS Drive x 2 (RAID-1) + PERC H730 W/ Toshiba PX04SMB160 1.6TB Enterprise SSD x 2 (RAID-0)
PSU: EVGA - 1000 T2 Modular PSU
Display(s): Acer - Predator Z1 31.5" 2560x1440 165 Hz Monitor +TCL 55S405 55" 4K HDR Display (Gaming Mode) + Samsung 27" Display (1080p60 Trash lol)
Cooling: Liquid Freezer II 280mm W/ 140mm Noctua iPPC 3000 RPM PWM Industrial Fans
Keyboard: Corsair K68 RGB (Cherry MX Red)
Mouse: Cooler Master MM720
Sound: Logitech G Series G935