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What Wattage for Crossfire R9 390s?

Gibs960

Planning on getting a 390 soon and I'll have to upgrade my PSU anyway but I was thinking that I want to (sorry) futureproof it a bit by maybe getting a slightly higher than needed PSU rather than have to buy 2 PSUs.

 

Thanks, also, give me a model of PSU to use please! :)

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At least 850W, any XFX/Seasonic/SuperFlower/EVGA B2/G2/GS/GQ/P2 unit

CPU: AMD Ryzen 7 5800X3D GPU: AMD Radeon RX 6900 XT 16GB GDDR6 Motherboard: MSI PRESTIGE X570 CREATION
AIO: Corsair H150i Pro RAM: Corsair Dominator Platinum RGB 32GB 3600MHz DDR4 Case: Lian Li PC-O11 Dynamic PSU: Corsair RM850x White

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I'm getting answers ranging from 750w to 1200w, so which is it?  :lol:

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I'm getting answers ranging from 750w to 1200w, so which is it?  :lol:

I'd say 850W, the guy who said 1200W is a tad crazy :P 1200W would be just fine with 3x CF...

 

edit: For the model I'd go for a EVGA 850W G2 :)

// irenebb-pc v5 // [] Intel i5-9400F [] Radeon VII Lisa Su Edition [] 24GB Crucial Ballistix [] Acer ED323QUR (1440p/144hz) []

 

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Planning on getting a 390 soon and I'll have to upgrade my PSU anyway but I was thinking that I want to (sorry) futureproof it a bit by maybe getting a slightly higher than needed PSU rather than have to buy 2 PSUs.

 

Thanks, also, give me a model of PSU to use please! :)

Getting a "futureproof" 1200w powersupply i find stupid, computer hardware is getting more and more power efficient and i doubt that trend will stop anytime soon.

And 3-way Crossfire we already know have diminishing return. And maybe in the future they have gotten around that but then you need to replace the cards you have now anyways to utilize the fix.

 

EDIT: Basically 850w is fine

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I'm getting answers ranging from 750w to 1200w, so which is it?  :lol:

750W is not enough. 390X in crossfire can take over 750W, so to have headroom with the 390's get 850W.

CPU: AMD Ryzen 7 5800X3D GPU: AMD Radeon RX 6900 XT 16GB GDDR6 Motherboard: MSI PRESTIGE X570 CREATION
AIO: Corsair H150i Pro RAM: Corsair Dominator Platinum RGB 32GB 3600MHz DDR4 Case: Lian Li PC-O11 Dynamic PSU: Corsair RM850x White

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850 watt is fine. Although that's going to be a hell of a lot of heat and noise ROFL.

 

A 750 watt will do aswell, but you could get near 750 watts if you load everything to the max with furmark and prime95 etc.

System specs
  • Graphics card: Asus GTX 980 Ti (Temp target: 60c, fan speed: slow as hell)
  • CPU: Intel 6700k @ 4.2Ghz
  • CPU Heatsink: ThermalRight Silver Arrow Extreme
  • Motherboard: Asus Maximus Viii Gene
  • Ram: 8GB of DDR4 @ 3000Mhz
  • Headphone source: O2 + Odac 
  • Mic input: Creative X-Fi Titanium HD
  • Case: Fractal Design Arc midi R2
  • Boot Drive: Samsung 840 Pro 128GB 
  • Storage: Seagate SSHD 2TB
  • PSU: Be quiet! Dark Power Pro 550w

Peripherals

  • Monitor: Asus ROG Swift PG278Q
  • Mouse: Razer DeathAdder Chroma (16.5 inch/360)
  • Mouse surface: Mionix Sargas 900
  • Tablet: Wacom Intuos Pen
  • Keyboard: Filco Majestouch Ninja, MX Brown, Ten Keyless 
  • Headphones: AKG K7xx
  • IEMs: BrainWavs S1
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My 290X and 290 are completely fine with my 1000W, gives me some headroom too.

i7 8086k @ 5.3Ghz / 32GB DDR4 Trident Z RGB @ 3733Mhz / Aorus GTX 1080 11Gbps / PG348Q

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What PSUw would you recommend for a single  390?

EVGA Supernova G2 PSUs are extremely well recieve, but aren't silent, unlike Be Quiet! PSUs, but you're running a 390, PSU noise would be the last thing on your mind.

System specs
  • Graphics card: Asus GTX 980 Ti (Temp target: 60c, fan speed: slow as hell)
  • CPU: Intel 6700k @ 4.2Ghz
  • CPU Heatsink: ThermalRight Silver Arrow Extreme
  • Motherboard: Asus Maximus Viii Gene
  • Ram: 8GB of DDR4 @ 3000Mhz
  • Headphone source: O2 + Odac 
  • Mic input: Creative X-Fi Titanium HD
  • Case: Fractal Design Arc midi R2
  • Boot Drive: Samsung 840 Pro 128GB 
  • Storage: Seagate SSHD 2TB
  • PSU: Be quiet! Dark Power Pro 550w

Peripherals

  • Monitor: Asus ROG Swift PG278Q
  • Mouse: Razer DeathAdder Chroma (16.5 inch/360)
  • Mouse surface: Mionix Sargas 900
  • Tablet: Wacom Intuos Pen
  • Keyboard: Filco Majestouch Ninja, MX Brown, Ten Keyless 
  • Headphones: AKG K7xx
  • IEMs: BrainWavs S1
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Do 390's run incredibly loud?

 

Sorry if that's a dumb question?

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Depends on the rest of your system. With a modest Intel CPU, 750W will indeed suffice if it's a quality unit. But for ideal efficiency and some headroom 850W is smarter.

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