While building a PC with an RTX 3090 TI GPU, beginners often get confused about which power supply (PSU) to use. In this article, I’ll explain the PSU requirements for this GPU and suggest some good PSUs to use with it.
Here’s The PSU Requirements For RTX 3090 Ti
When choosing a Power Supply for the RTX 3090 TI GPU, there are three things we need to keep in mind: the Power Supply wattage, the number of PCIe connectors the PSU has, and its efficiency ratings.
These are the primary PSU requirements for this RTX 3090 TI GPU. Now, we will take a closer look at these PSU requirements and pick some of the best PSUs for this particular GPU.
What PSU Watts For RTX 3090 TI GPU?
According to Nvidia, this RTX 3090 TI GPU will consume 450W under extreme load, and they recommend picking an 850W PSU.
But, picking the PSU wattage based on GPU specifications is not recommended because you might end up buying a PSU with the wrong wattage.
To decide what PSU watts to choose, we will figure out how much power all the system components will consume and then do the estimation.
In order to do the proper estimation, we will pair this RTX 3090 TI GPU with all the high-end, mid-range, and budget-end components to decide what PSU wattage we should pick.
But before that, let’s take a look at the table below to see how much power each PC component consumes.
RTX 3090 TI GPU With High-End Components
If anyone pairs this RTX 3090 TI GPU with a top-tier CPU and other high-end components, then the estimated power consumption would be like this:
| Components | Peak Power Consumptions |
| RTX 3090 TI GPU | 450W |
| Top-Tier Intel CPUs (e.g., Intel Core i9 13900K) | 253 watts |
| Top-Tier Ryzen CPUs (e.g., Ryzen 7 7950X) | 230 watts |
| 2 SSDs | 18 watts |
| 2 Hard Disk | 40 watts |
| Motherboard | 80 watts |
| 4 RAMs (16 GB) | 60 watts |
| 3 Case fans (120mm) | 18 watts |
| 2 CPU fans (liquid cooler-120mm) | 12 watts |
| Total= 931 watts with Intel CPUs Total= 908 watts with Ryzen CPUs |
If you pair this RTX 3090 TI GPU with a top-tier Intel CPU and other high-end components, then the estimated power consumption would go up to 931W, and for this kind of PC, you should pick a 1000W Power Supply.
However, if you pair this RTX 3090 TI GPU with a top-tier Ryzen CPU and other high-end components, then the estimated power consumption would go up to 908W, and for this kind of PC, you also need to pick a 1000W PSU.
RTX 3090 Ti With Mid-Range Components
If anyone pairs this RTX 3090 TI GPU with a mid-tier CPU and other mid-range components, then the estimated power consumption would be like this:
| Components | Peak Power Consumptions |
| RTX 3090 TI GPU | 450 watts |
| Mid-Tier Intel CPUs (e.g., Intel Core i5 13600K) | 181 watts |
| Mid- Tier Ryzen CPUs (e.g., Ryzen 7 7700X) | 142 watts |
| 1 SSD | 9 watts |
| 2 Hard Disk | 40 watts |
| Motherboard | 70 watts |
| 2 RAMs (16 GB) | 30 watts |
| 3 Case fans (120mm) | 18 watts |
| 1 CPU fan (120mm) | 6 watts |
| Total= 804 watts with Intel CPUs Total= 765 watts with Ryzen CPUs |
If you pair this RTX 3090 TI GPU with a mid-tier Intel CPU and other mid-range components, then the estimated power consumption would go up to 804W, and for this kind of system, you can pick an 850W PSU.
On the other hand, if you pair this RTX 3090 TI GPU with a mid-tier Ryzen CPU and other mid-range components, then the estimated power consumption would go up to 765W, and for this kind of system, you can pick an 800W Power Supply.
RTX 3090 TI With Budget-Range Components
It is doubtful that anyone will pair this strong GPU with a budget-end CPU because of the bottleneck issues, but still, if anyone pairs this RTX 3090 TI GPU with a budget-tier CPU and other budget-range components, then the estimated power consumption would be like this:
| Components | Peak Power Consumptions |
| RTX 3090 TI GPU | 450 watts |
| Budget-Level Intel CPUs (e.g., Intel Core i9 11900K) | 125 watts |
| Budget- Level Ryzen CPUs (e.g., Ryzen 5 3600X) | 88 watts |
| 1 SSD | 9 watts |
| 1 Hard Disk | 20 watts |
| Budget end Motherboard | 60 watts |
| 2 RAMs (8 GB) | 14 watts |
| 2 Case fans (120mm) | 12 watts |
| 1 CPU fan (120mm) | 6 watts |
| Total= 696 watts with Intel CPUs Total= 659 watts with Ryzen CPUs |
If you pair this RTX 3090 TI GPU with a budget-tier intel CPU and other budget-end components, then the estimated power consumption would go up to 696W, and for this kind of PC, you need to pick a 750W PSU.
However, if you pair this RTX 3090 TI GPU with a budget-tier Ryzen CPU and other budget-range components, then the estimated power consumption would go up to 659W, and for this kind of PC, you can choose a 700W Power Supply.
PCIe Cables Required For RTX 3090 TI
The RTX 3090 TI is a powerful GPU that requires external power via extra PCIe connectors.
With this RTX 3090 TI GPU, you will get (one 12-pin adapter) in the box, and you require three 8-pin PCIe connectors from the Power Supply.
You need to connect the three 8-pin PCIe connectors to the adapter, then plug the other end of the adapter (12-pin side) into the GPU.
It is always recommended to check the specifications of the GPU to determine how many PCIe cables you require.
PSU Efficiency Required For RTX 3090 TI
Before choosing the Power Supply, we need to check whether the PSU has good PSU efficiency or not.
A good Power Supply comes with 80+ certifications that indicate the energy efficiency of the Power Supply.
This 80 Plus PSU is categorized into different efficiency levels, including- 80 Plus White, Bronze, Silver, Gold, Platinum, and Titanium. You can read this article to know more about- different PSU efficiency.
Among these different levels, the 80 Plus Bronze, Silver, and Gold offer excellent performance within the budget range.
So, if you plan to pair this RTX 3090 TI GPU with high-end or mid-range PC components, pick an 80-plus gold-rated Power Supply.
However, if you plan to pair this RTX 3090 TI GPU with budget-end PC components, opt for an 80-plus Bronze-rated Power Supply.
PSU That Most PC Builders Pairs With RTX 3090 TI
I have mentioned some of the best Power Supplies that most PC builders are pairing with the RTX 3090 TI GPU.
Recomended PSU For RTX 3090 TI GPU With High-End Components
The RTX 3090 TI GPU with all the high-end components needs a 1000W Power Supply with 80+ Gold or higher efficiency ratings.
For this kind of PC system, most PC builders are using different PSU, and here are those-
- Corsair RM1000x
- Seasonic Focus GX-1000
- Be Quiet! Dark Power Pro 1000W
- EVGA SuperNOVA G3 1000W
- MSI MPG A1000G
All of these power supplies have 80 Plus Gold efficiency ratings, so you can choose anyone with a lower price.
Recomended PSU For RTX 3090 TI GPU With Mid-Range Components
The RTX 3090 TI GPU with all the mid-range components needs a Power Supply between 800W to 850W with an 80+ Gold efficiency rating.
For this type of system, many PC builders use various power supplies, and here are some examples.
- Corsair RM850x
- EVGA SuperNOVA G6 850W
- MSI MEG A-GF850
All of these power supplies have the 80+ Plus Gold efficiency rating, so you can choose the cheapest one.
Recomended PSU For RTX 3090 TI GPU With Budget-End Components
The RTX 3090 TI GPU with all the budget-end components needs a PSU between 700W to 750W with 80 Plus Bronze efficiency ratings.
For this type of PC, many PC builders use various power supplies, and here are some examples-
- Cooler Master V750 Gold V2
- ASUS ROG 750W LOKI
- Seasonic Prime TX-750
All these PSUs come with a good efficiency rating so that you can choose the cheapest one.
