Question Is my PSU enough for my future upgrade?


Aug 12, 2019
Hello guys, i am planning to upgrade my GPU and my case.

I am having spacing issues and heating issues on my current case (Corsair 465X).

I am planning to upgrade the case to a Lian-LI PC-011D Dynamic XL Rog Edition, the AIO to Corsair iCUE H150i ELITE CAPELLIX and i plan to add 6 fans both at the top and bottom.

It's also worth to mention that in a future (4-5 months) i will upgrade to an RTX 3090, more specific EVGA GeForce RTX 3090 FTW3 ULTRA GAMING.

My actual PC looks like this:

  • Motherboard: ASUS ROG Strix Gaming B550-F
  • CPU: AMD Ryzen 9 3900X (3.8GHz @ 1.235V)
  • CPU Cooler: Corsair H100i RGB Platinum
  • RAM: Corsair Dominator Platinum RGB 2x16 3200mhz
  • Case: Corsair 465X
  • PSU: Corsair RM750 80+ Gold
  • GPU: Sapphire Pulse RX 5700 XT 8GB GDDR6
  • Monitor 1: Asus TUF Gaming VG27WQ 27" LED Wide QuadHD 165Hz HDR FreeSync Premium Curved
  • Monitor 1: NewSkill Icarus 27" QHD 165hz G-Sync compatible.
  • SSD M.2: PNY CS2130 1TB SSD M.2 NVMe PCIe Gen3 x4
  • SSD: Samsung 860 QVO SSD 1TB SATA 3 V-NAND QLC
  • HDD 1 & 2: Seagate Barracuda 2TB
  • Keyboard: Corsair K68 RGB
  • Mouse: Corsair M65 Elite RGB
  • MousePad: Razer Goliathus Extended Chroma
My concern is the PSU, will it be enough for the upgrades (including GPU) or will i need to change it? If so, i am going to buy the first upgrades the next month.

Before anyone says anything about the RTX 3090 being overkill for 1440p (doesn't mean i will only play at 1440p), i plan to buy it to save enough money to buy a new GPU in 5-6 years.


Feb 20, 2020
For a 3090?

I would not take any PSU lower than 850 W. And platin- or titanium-standard.

+gold does have an average of just 90% at 50% duty. And a bit lower at 100%.

Let's take 90%. That means, if the PSU pulls out 750 W from outlet, your PC only gets about 675 W. And when you read some tests about 3080/3090 and the much higher, but very short power spikes, than you should agree with me.
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The manufacturer minimum PSU is listed as 750w for that GPU. I always tend to look for a 20-25% gap between recommended minimum and what I'd buy since you never know what you might want to add in the future. In your case I'd be looking for something closer to a 1000w supply but you can get by with a quality 850w unit as others have said.