Question Is the power supply that I picked out enough for my system?

[litaidd]

I used to build computers a lot between 2010-2018 as part of my old job but since then I now work as a software eng so I haven't been keeping up with parts like crazy like I used to. I'm not looking to swap out anything other then what I'm asking about. I wanna know if the psu that I picked out is enough? I know back when I used to build a lot 850w would be enough to sli two high end cards but I know the 4080 and 4090 are crazy power hungry and I selected the 4090. I'll post my build in plain text format. I already own the case, fans, and there's only one SSD because I'm just gonna swap over my old ones over to this one.

PCPartPicker Part List: https://pcpartpicker.com/list/LYKvqR

CPU: Intel Core i9-14900KF 3.2 GHz 24-Core Processor ($549.79 @ B&H)
CPU Cooler: Corsair iCUE H100i RGB ELITE 59.1 CFM Liquid CPU Cooler ($139.99 @ Amazon)
Motherboard: MSI PRO Z790-S WIFI ATX LGA1700 Motherboard ($158.99 @ Newegg)
Memory: G.Skill Trident Z5 RGB 32 GB (2 x 16 GB) DDR5-6000 CL36 Memory ($109.99 @ Newegg)
Storage: Samsung 980 Pro 1 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive ($79.98 @ Amazon)
Video Card: MSI GAMING X TRIO GeForce RTX 4090 24 GB Video Card ($2019.98 @ Newegg)
Case: Corsair 4000D Airflow ATX Mid Tower Case ($104.99 @ Amazon)
Power Supply: Corsair RM850e (2023) 850 W 80+ Gold Certified Fully Modular ATX Power Supply ($119.99 @ Newegg)
Total: $3283.70
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2023-11-30 10:42 EST-0500

 

[jeremyj_83]

I used to build computers a lot between 2010-2018 as part of my old job but since then I now work as a software eng so I haven't been keeping up with parts like crazy like I used to. I'm not looking to swap out anything other then what I'm asking about. I wanna know if the psu that I picked out is enough? I know back when I used to build a lot 850w would be enough to sli two high end cards but I know the 4080 and 4090 are crazy power hungry and I selected the 4090. I'll post my build in plain text format. I already own the case, fans, and there's only one SSD because I'm just gonna swap over my old ones over to this one.

PCPartPicker Part List: https://pcpartpicker.com/list/LYKvqR

CPU: Intel Core i9-14900KF 3.2 GHz 24-Core Processor ($549.79 @ B&H)
CPU Cooler: Corsair iCUE H100i RGB ELITE 59.1 CFM Liquid CPU Cooler ($139.99 @ Amazon)
Motherboard: MSI PRO Z790-S WIFI ATX LGA1700 Motherboard ($158.99 @ Newegg)
Memory: G.Skill Trident Z5 RGB 32 GB (2 x 16 GB) DDR5-6000 CL36 Memory ($109.99 @ Newegg)
Storage: Samsung 980 Pro 1 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive ($79.98 @ Amazon)
Video Card: MSI GAMING X TRIO GeForce RTX 4090 24 GB Video Card ($2019.98 @ Newegg)
Case: Corsair 4000D Airflow ATX Mid Tower Case ($104.99 @ Amazon)
Power Supply: Corsair RM850e (2023) 850 W 80+ Gold Certified Fully Modular ATX Power Supply ($119.99 @ Newegg)
Total: $3283.70
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2023-11-30 10:42 EST-0500

When it comes to the 4090, people like Aris Mpitziopoulos (Tom's PSU tester and runner of hwbusters) recommend at least 1000W PSUs. Therefore I'd recommend going to a 1000W+ PSU.

 

[helper800]

An 850w PSU is most likely enough. I would still probably buy a 1000w PSU because of the intermittent spikes the 4090 can cause. I have a 3080 with a 500w BIOS that i benched a bit and I used a Seasonic 850w Prime Titanium PSU, however, I have an AMD system and my CPU was 140w or so max. The 14700kf can pull 300w by itself so, I would not pair a 4090 with an intel 14700k or 14900k and an 850w PSU.

 

[g-unit1111]

I personally would not pair a 4090 with anything less than a 1KW, it will not end well. Especially since NVIDIA is still experiencing problems with burnt end connectors (JayZTwoCents recently did a video about this). A 4090 is a huge power hog, so it needs a really beefy supply.

Something like a Corsair RM1000X, or a Seasonic Prime, or MSI MPG is what you want. But again, for that particular card, don't get anything less than 1KW. And also check to see if you get an NVIDIA friendly cable included with the supply.

 

[helper800]

Something like this would be appropriate.

 

[litaidd]

Thanks for all the replies and yeah I just have been out of the loop for awhile. I swapped out the psu for a 1000w one, kind of crazy how power hungry cards are now.