Best CPU for RTX 4090 (Cheap, Compatible, AMD, Intel)

If you are building a new rig with high card RTX 4090 or upgrading your system with a new GPU and CPU. You can buy the RTX 4090 Graphics card for Intensive tasks, 3D rendering, high-end gaming, and multiple applications. However, you want to buy a new CPU along with the card. The Processor is the most important factor in your system; here in this post, we tell you about the Best CPU For RTX 4090.

Intel AND AMD are both famous brands in the market, and both brands are very impressive. These brands’ products’ quality, features, and performance are amazing, with reasonable prices. In this post, you can see the Intel and AMD processors, which will help to make the most out of your new flagship RTX 4090 Graphics card. 

All of the products in this post are brilliant for application tasks because they also have 10 to 16 cores with 20 to 32 threads with clock speeds from 3.2 GHz to 4.8 5,2 GHz. In addition, PCIe 4.0 supports these products, connecting you to the gaming conventions. 

The 16 to 72 MB Cache L3 is available in these processors, which helps run smoothly when you work on difficult tasks. In addition, some products come with the LED Cooler for your processor cooling, which maintains your processor temperature and allows it to work continuously. And the Best feature for you in which products is the TDP which is 65 to 125 watts. 

The Intel Core i9-10900 Processor is impressive and affordable with great features. Plus, For CPU Cooling, you do not worry about buying any extra cooler with this product. Because the AMD Ryzen 9 3900X unlocked desktop processor comes with the Wraith Prism LED Cooler at an affordable price.

Here is the list lab tested Best CPU For RTX 4090

  1. Intel Core i9-10900 Desktop Processor
  2. AMD Ryzen 9 5900 X Thread Unlocked Desktop Processor
  3. AMD Ryzen 9 3900 X Unlocked desktop processor
  4. Intel Core i7-11700KF Desktop Processor
  5. AMD Ryzen 9 5950X 32-Thread Unlocked Desktop Processor
  6. Intel Core i9-12900K Desktop Processor

1- Intel Core i9-10900 Desktop Processor

Intel Core i9-10900 Desktop Processor

Do you want a high-end processor for using RTX 4090 that upgrades your PC? The Intel Core i9-10900 Desktop Processor, which is not brilliant for 4K gaming, is also great for video editing and 3D rendering. Because it also comes with 10 cores and 20 threads, which is amazing for multitasking, and any other intensive task. 

That can handle your gaming task because of its up to 5.2 GHz speed and Intel Turbo boost Max technology 3.0 support. Such as along with this Processor, you can get 65 TDP watts which will not take up a lot of space and not consume more energy. That is a very ideal option if you’re a budget tighter user but want a new processor for the new GPU UP Graded.

Furthermore, Intel optional memory allows you to get the maximum daily or advanced use for your new RTX 4090 GPU. Such as, You can use this Processor with intel 400 Series chipsets motherboards. Plus, with the 20MB of cache memory that helps the speed of accessing data increase, the CPU works faster.

Along with this feature, you can store computer programs, applications, and data with information. So, you do not be late anymore, and this Processor today! If you want the most out of your new flagship RTX 4090 Graphics card, this processor will help you.


The Intel Core i9-10900 Desktop Processor Speed 88%, Productivity 88%, gaming 95% compared to its previous version, is an ideal choice for your RTX 4090 new next-generation card. If we compare it to its previous version, i9 10850K, then i 9-10900 is an amazing CPU for RTX 4090 and consumes up to 48% less energy than i9 10850K.  


  • Strong performance 
  • Low TDP 
  • Pkg includes a CPU Cooler 


  • Low all-core base

2- AMD Ryzen 9 5900 X

AMD Ryzen 9 5900 X Thread Unlocked Desktop Processor

You Know, the CPU is important for every system, particularly when you are a gamer. The Processor handles the games logically and physically. For the RTX 4090 new high flagship card, you want the Great CPU that upgrades your GPU or all systems. The AMD Ryzen 9 5900X is an ideal choice because it is the best brand gaming desktop processor that supports the 12-core and 24 processing threads.

You can have a competitive edge because of a boost clock speed of up to 4.8, making it the topmost enthusiast processor for gamers, creators, and everyone. In addition, you can take full advantage of multi threaded tasks like 3D rendering and software because of its 12-core and 24 threads ability.

Such as this Processor supports the advanced socket AM4 platforms and comes with the PCIe 4.0 on X570 and B550 motherboards. Therefore the Max boost unblocked overclocking allows increased processor performance. Ryzen 9 offers 100-plus FPS performance in the most familiar games, Like Fortnite, Game average, God of War, etc. 

This Processor supports 70 MB of cache memory with the DDR-3200; because of this Cache memory, this CPU works speedily and makes all computer systems faster. Furthermore, this Processor’s thermal design power is just 105 watts and provides brilliant performance in some popular games like Fortnite, PUBG, etc., at a speed of 100 FPS.


Suppose we compare the AMD Ryzen 9 5000X to its previous AMD Ryzen 5 3400G. Ryzen 9 provides up to 35% better performance in Minecraft than the Ryzen 5 3400G. The Ryzen can also achieve more multi threaded tasks simultaneously than AMD 53400G- 24 & 8 threads. Both Processors have the same features, differences between Cores and threads, and price. Just a $5 difference in the price. If you want smooth performance for your RTX 4090, go with the AMD Ryzen 9 5900X.


  • Excellent for intensive application performance 
  • Support PCIe 4.0
  • Amazing multiplier unlocked
  • Along with gaming performance improved.
  • The well-organized manufacturing process for thermals. 


  • Not include cooler
  • Consume high energy

3- AMD Ryzen 9 3900 X

AMD Ryzen 9 3900 X Unlocked desktop processor

The AMD Ryzen 9 3900X is a simple, powerful, overclocking utility ryzen processor. You know the AMD processors are less expensive than the Intel CPUs; therefore, this Processor is also affordable with Wreath Prism LED Cooler. Along with this Processor, you can get the 12 cores, a very impressive feature that will allow you to multitask and play games faster and smoother.

You have more than your card performance because of 24 threads ability, and you can do it with video rendering, productivity software, etc., and handle various tasks together. Such as, in most games, you can get 100 FPS performance; because of this FPS rate, playing games feel more responsive, which keeps you less input lag.

This Processor comes with 70 MB of cache memory with the DDR-3200. Because of this Cache memory, this CPU works speedily and makes all computer systems faster. Moreover, you don’t need to worry about cooling for this Processor. You don’t need to buy a separate cooling fan because this Processor comes with AMD Wraith Prism Cooler.  And RGB light control, direct-contact heat pipes, and a thin profile for improved compatibility.

Just One Click Overclocking Precision Boost uses your motherboard’s robust design to boost clock speed higher and longer. Plus, up to twice the game cost of its previous generation, designed to reduce memory lag and latency for higher frame rates in top titles.


If we compare the AMD Ryzen 9 3900X to AMD Ryzen 9 3950X, both Processors have the same features; the biggest difference between the price, Cores, and Threads. With more cores and threads, the Ryzen 9 3950X is the more capable multi thread CPU. However, if you want a processor, especially for gaming, the 3900X is potentially an overkill CPU. 

And also included an AMD Wraith Prism cooler with control LED, affordable with excellent performance. So if you are a budget-conscious user, buy the 3900X and save 400$ compared to the 3950X.


  • Support 70 MB of Cache memory
  • Offers 100 plus FPS performance. 
  • Included LED Cooler
  • Great for high-end gaming. 


  • Higher power consumption

4- Intel Core i7-11700KF

Intel Core i7-11700KF Desktop Processor

Do you require a powerful, capable Desktop processor that handles any intensive tasks? So, this Intel Core i7-11700KF desktop is affordable with impressive features that help to most out of your new flagship RTX 4090 card. The 8 cores with 3.60 GHz handle any heavy tasks without any lag problems.

Its 16 threads and hyper threading architecture deliver high performance for challenging applications with better onboard graphics and faster turbo boost. In addition, support of 14nm enables improved performance per watt and microarchitecture.  That keeps it more power efficient, Along with this process, you can get 16 MB of L3 cache memory. 

Because of this Cache memory, this CPU works speedily and makes all computer systems faster. Unblocked means you can overclock it for more power and max clock speed up to 5. o and a base clock speed of 3.6 GHz. These features help to get the most out of your PC and get amazing performance in your new flagship card. 

Furthermore, this Processor is easily compatible with Intel LGA 1200 sockets and 4000 and 5000 series chipsets. The ASUS TUF Gaming Z590- Motherboard is the best motherboard for this i7 Processor. This Processor’s thermal design power is just 125 watts; under heavy loads, It will not take much energy, which is very good.


If you are a budget-conscious user, you want the affordable Processor for your high-end card and the Intel Core i7-1100KF Desktop processor. Compare this CPU to the i7-11700K, both Processors have the same features, but the Intel Core i7-11700KF is compatible with ASUS TUF gaming Z590-Plus LGA 1200 Motherboard. And it’s up to 7% cheaper than Core i7-11700K, or up to 8% better value when you play Valorant than Core i7-11700k.


  • Excellent performance 
  • PCIe 4.0
  • Brilliant for the latest graphics-intensive games


  • High Power Consumption

5- AMD Ryzen 9 5950X

AMD Ryzen 9 5950X 32-Thread Unlocked Desktop Processor

Suppose you want the best Processor for RTX 4090 that can do it all, the highest single-and multi-core performance for the most demanding games and creators. The AMD Ryzen 9 5950X is an excellent choice because of its 72 MB of cache and also supports the DDR-3200.

Along with the 16 core and 32 threads, this powerhouse can handle the most difficult tasks with these number of cores and threads. Moreover, this CPU offers 100 Plus FPS, which can help your computer create a smooth-flowing image in-game. Such as, the best feature of this device is that it is easily compatible with the advanced sockets AM4 platform.

And also support the PCIe 4.0 on X570 and B550 Motherboards. Therefore, your system runs smoothly with up to 4.9 GHz Max clock speed; you know the organization and customizing your rig is never easy. But the AMD Ryzen 5000 series motherboards with simple BIOS updates. 

Such as, This AMD Ryzen 9 is the best Processor for those users that are looking to Customize and organize and get more from their unlocked Processor. And along with the master utility feature allows you real-time access to temperature, fan speed, memory timings, and CPU frequencies.


If we compare the AMD Ryzen 9 5950X to AMD Ryzen 9 3950X, both Processors have the same features, the biggest difference between the prices. If you want a processor, especially for gaming, then the 3900X is potentially an overkill CPU for gaming. This 5950X is 42% faster in a single-core and 4% higher Turbo Boost frequency. The Ryzen 9 3900X is affordable with excellent performance. If you are a budget-conscious user, buy the 3900X and save 400$ compared to the 3950X. 


  • Brilliant multitasking performance
  • Excellent for gaming
  • The powerful manufacturing process for thermals
  • Great base and boost clock speed for gaming. 
  • Affordable


  • Use High power 
  • Does not include CPU cooler in package

6- Intel Core i9-12900K

Intel Core i9-12900K Desktop Processor

The Intel Core i9-12900K Desktop Processor offers the E-Core and Score, more cache, and high speeds that make your system fast, and you can work smoothly. That brings your vision to life and is an ideal choice for the new flagship RTX 4090 card. Along with this product, you get brilliant performance.  When using creative tools, video rendering, high-end gaming, and multi-heavy programs, Because of 16 cores, 24 threads, and 30MB of cache. 

With this, you can push your gameplay to new levels, and as such, you can run secondary apps seamlessly in the background. Because of 16 cores (8 Performance-cores, 8 Efficient-cores) and 24 threads. P-cores are specially built for performance-enhancing activities like gaming and productivity.

This Processor is amazing for every task because its E-cores are upgraded for multi-threaded performance, minimizing lags from secondary tasks. Therefore, this Processor comes with 30MB of cache.  Enhancing system speed and providing excellent access in a short time, and enabling improved system performance.

You can use this Processor with the 1700-LGA socket for the installation on the PCB. Intel 7 Architecture enables improved performance and keeps everything in your gaming.  Universe running smoothly with this feature to improve performance throughout your PC. In addition, a 125W is a highly efficient power feature that is perfect for your desktop system.  


If we compare Intel Core i9-12900K to the Intel Core i9-12900 KS, both CPUs have the same features, but the 12900k is better and more affordable than the 12900 KS. For example, 12900K is 50 C higher maximum operating and 17.31% cheaper than the 12900 KS.


  • Brilliant, powerful gaming CPU performance
  • Significantly cheaper than Ryzen 9 5950x
  • Support LGA 1700 and 600 series chipsets motherboards. 


  • Power Consumption
  • Not include CPU Cooler

Best CPU for RTX 4090 Buying Guide

The RTX 4090 is the new coming flagship Graphics card with great features. For this card, you want the Processor that helps most out of the RTX GPU. So you are looking for the CPU for this, here we tell you some important features for high performance. 

Cores And Threads

First, the processor Core is very important because cores allow PCs to run smoothly, increasing performance. For the RTX 4090, GPU minimum 10 and maximum 16 core is best. In this post, all products are the best match for this GPU. 

Another main factor is the threads, which are a vital part of the Processor; with more threads, you can perform multiple tasks simultaneously, making the tasks faster. As a result, the AMD Ryzen 9 3900 X 12 core 24 threads desktop processor is great for every heavy tasking, High-end gaming, etc.  

Max Boost Speed

Processor clock speed is a critical factor controlling performance in games and workloads functions. The max boost technology has 2.0 and 3.0, which keep the CPU cool and help to fasten tasks. In this post, Some products come with a 4.8 speed, and some have a 5.2 GHz boost clock speed.


To save money, you must look at the TDP feature; because of this feature, you do not need to buy an extra PSU. With the 65 and 125, Watta Processors are coming. That is enough for your CPU’s extra thermal energy; in this post, some products come with 65 and some 125 Watts.


The socket compatibility is most important for your CPU; unmatched, your system is a waste. For this, you check most of the socket compatibility and New generations. Processors are mostly compatible with motherboards and sockets.

For example, the AM4 platform and LGA 1200 or 1700 sockets are mostly compatible with your Processor. In this post, all products come with this compatibility feature. 


Memory is also important in the CPU, is used to lessen the average time to access data from the main memory, and is an extremely fast memory that works as a buffer between RAM and the CPU.

The more cache memory, the faster it will process. Its 30% cache of memory is good for running Processors fast and smoother. But in this post, along with the products, get the 16 MB Cache To 72 MB of cache.

Minimum Requirements For RTX 4090

  • Core 10 Core and 20 threads
  • Cache Memory 16 MB with L3 or L2
  • TDP 65 Watts
  • PCIe 4.0 PCIe 
  • Max Boost Speed 3.0
  • Core 16 Core and 32 threads
  • Cache Memory 30 or 70 MB with L3
  • TDP 125 Watts
  • PCIe PCIe 4.0
  • Max Boost Speed 4.8 or 5.2 GHz 

Nvidia GeForce RTX 4090 vs RTX 3090 Ti vs RTX 3090

The Nvidia RTX 4090 is a new flagship card which looks to run high-end Gaming PC, and these are king of the hill. If we compare this card to its previous 3000 series RTX card then The RTX 4090 boasts 52 % more cores and is 66 % faster than the RTX 3090 Ti and 82 % faster than the RT3090 in terms of speed.

Features RTX 3090 RTX 3090Ti RTX 4090

  • Architecture Ampere Ampere Ada Lovelace
  • GPU GA102 GA102 AD102 Process node 8nm Samsung 8nm Samsung 5nm TSMC
  • CUDA cores 10, 496 10,752 16,384
  • Base clock 1,395Mhz 1,560MHz 2,235 MHz
  • Boost clock 1,695MHz 1,860 MHz 2,520 MHz
  • Memory 24GB GDDR6X 24GB GDDR6X 24GB GDDR6X
  • TDP 350W 450W 450W


What CPU Matters for RTX?

Yes, if you are buying the New flagship card RTX 4090, then for its amazing performance the cpu matters.

Does A CPU Increase The FPS?

Yes, pairing your GPU with a suitable CPU you can 40% increase the FPS for a more clear and fast image.

What CPU Is The Best for RTX 4000 Series? 

AMD Ryzen 9 3900 X 12-core, 24-thread unlocked desktop and Intel Core i9-10900 Desktop Processor 10 Cores are good for this.

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