Best CPU For RTX 4090 (Intel, AMD, Gaming, Compatible)

The value minded gamers love DIYing their cetric gaming setups and are keen interested to try out innovations. With the upcoming release of RTX 4090 they are looking to know the Best CPU For RTX 4090. In this article we are going to review top picks that can be paired up with RTX 4090 and a buying guide is available too. Let’s get head into it!

Buckle your seatbelt, your favorite Nvidia is going to release their new graphics card the RTX 4090 in its top tier category. This is the most awaited graphics card gamers are desperately waiting for. The RTX  4090 release date is 12 October 2022, which will be a big release after 2 years from Nvidia. Expectations are so high from this video card since Nvidia claims it would be proven as per your demands. 

With the latest architecture and 24 GB VRAM RTX 4090 ready to deliver 4K gaming with smoother graphics. Due to top notch specs experts say that it would be more for procumers instead of gamers. However, without pairing it up with an appropriate processor you can not attain the most expected performance out of it. Intel and AMD are 2 big names for the mass production of desktop gaming CPUs

Meanwhile it is a bit difficult to choose your right CPU as there are a lot of options. For RTX 4090 a CPU with minimum 8 cores up to 16 cores will be best. The gamers who love AMD for them nothing can be as better as AMD Ryzen 3950X 16 core processor to pair up with RTX 4090. 

To expand horizons and for the connectivity of a 4k monitor or other recording and streaming gadgets PCIe support must have spec. Intel core i9-12900 KS is an amazing choice as it comes with PCIe 5 Gen support and gives high performance. Keep reading for more info!

RTX 4090 PC build CPU Requirements:

  • Cores: min. 8 recommended 16 cores
  • Clock Speed: 4.5 GHz
  • Cache Memory: 30 MB
  • TDP: 125 GB
  • Overclocking: As per your choice 
  • PSU: 850 watts

RTX 4090 VS RTX 3090 Ti 

These 2 graphics cards from Nvidia are famous for their specs and performance. However they are manufactured with some distinction specs from each other. Below are a few main differences between these GPUs!

  • The RTX 4090 is the latest video card that is based on Ada Lovelace architecture and for 3090 Ti Ampere is used.
  • RTX 3090 Ti requires12-pin PCle power adaptor for connectivity whereas Nvidia RTX 4090 is a one setup configuration
  • RTX 4090 is bundled with 16,384 CUDA cores and RTX 3090 Ti comes with 10,752
  • There is also difference in Ray Tracing cores and Tensor cores such as RTX 4090 has 144 of 3rd Gen RT cores and 576 Tensor cores and RTX 3090 Ti equipped with 84 RT and 336 Tensor cores
  • We looked a difference in base and clock speed as well, for the RTX 4090 base clock is 2235 MHz and boosted speed is 2520 Hz and RTX 3090 Ti comes with 1560 MHz base and 1860 MHz boost clock speed
  • However both GPUs are designed with same VRAM of 24 GB with same memory type GDDR6X
  • TDP of both graphics card is 450 watts that is again identical 
  • Nvidia claims that its latest GeForce RTX 4090 will be between 2 and 4 times faster than its predecessor, the RTX 3090 Ti. we can expect too due to the inclusion of new features like latest architecture, 3rd Generation Ray Tracing and DLSS 3 

List of Recommended Top Rated Best CPU For RTX 4090

  1. Intel Core i7-12700KF Desktop Processor
  2. AMD Ryzen 9 5950X 16-core Desktop Processor
  3. Intel Core i7-11700KF Desktop Processor
  4. Intel Core i9 -12900KS 2.50 GHz Processor
  5. AMD Ryzen 7 5800X3D 8-core Desktop Processor
  6. AMD Ryzen 9 3950X 16-Core Unlocked Desktop Processor

1- Intel Core i7-12700KF Desktop Processor

Intel Core i7-12700KF Desktop Processor

When you want to buy a powerful processor, how could we forget about Intel, you can take Intel i7-12700KF. Intel is famous for innovative products and setting the industry standard. Comes with 3.60 Ghz speed and provides sufficient cache memory and hyper threading architecture. Enables you to perform demanding tasks due to the high performance features set. 

Along this CPU you can do anything in a better way as you have faster turbo boost and amazing on board graphics. With the help of LGA 1700 socket you can easily install it on PCB without any hassle. You do not need to solder it while it’s installed on the PCB. For the supreme performance you have dual cache memory one is 11 MB L2 and other is 25 MB L3. 

With the cache memory you can perform computation intensive apps incredibly. Based on 7 architectures that give you improved performance per watt. Having microarchitecture your computer system will work effectively because it makes your processor power efficient. This CPU is designed with 18 cores which is the combination of 8P and 4E cores.This graphics CPU is compatible with AMD RX 6500 XT , Radeon RX 6950 XT CPU

The single P cores give base speed 3.6 GHz and Maximum is 5.0. when it comes to the Single E cores the base speed is 2.7 Ghz and maximum E core speed it has 3.8 GHz. These speeds are enough to perform anything like computing and gaming. The processor base power is 125 watts and it requires a discrete graphics card for better visuals. Recommended for the motherboards of 600, because it is compatible with them.


We looked at 2 12 core processors, i7 12700KF and core i7 12700F side by side. The advantages of i7 12700KF are it is an unlocked multiplier, giving 19 percent fast performance in single core. And also it offers 4 percent higher turbo boost frequency then i7 12700F. However the biggest benefit of the i7 12700K is it consumes up to 48 percent less energy as compared to the i7 12700KF. 


  • Extreme fast
  • Top notch gaming performance
  • Incredible price
  • Insane productivity performance 


  • Gets heat up easily 
  • Lack of proper cooling system 

2- AMD Ryzen 9 5950X 16-core Unlocked Desktop Processor

AMD Ryzen 9 5950X 16-core, 32-Thread Unlocked Desktop Processor

Gamers are power-hungers that is why they want to invest in something powerful. If you are one of them then you can buy an AMD Ryzen 9 5950X. Along this CPU you can attain unprecedented speed to perform anything from computing to gaming. Bring this CPU for your gaming system and be unstoppable as AMD claims that it is one of the fastest CPUs and this Programming CPU is also perfect for RX 6900 XT CPU

Designed with 16 cores and doubles of processing threads so you can do anything from gaming to creativity tasks. Gamers love it because it enables you to deliver elite 100 plus FPS performance in most demanding and famous video games. This is an unlocked processor for desktop systems which means you can push its speed to get its full potential. 

Supports maximum boost speed of 4.9 GHz that is enough to perform whatever you want. For fast computing it also has a cache space of 72 MB of DDR 3200. This processor is born for the advanced CPU socket AM 4 platforms. With the help of this socket you can easily install it on PCB even without soldering. 

Ryzen 9 5950X is compatible with X570 and B550 motherboards as it supports PCIe 4.0. The supported operating system is Windows 10 – 64-Bit Edition RHEL x86 64-Bit Ubuntu x86 64-Bit. However, the supported operating system varies by the manufacturer. The CPU cooler is not included in the box that is why you need to spend extra money to maintain the temperature. For better cooling management a liquid cooler is recommended. 


When we compared the Ryzen 9 5900X with the 5950X, we analyzed that the 5950X is better than the 5900X. Because it has 22.52 faster clock speed and 8 more CPU threads. Also it has bigger cache memory and ECC memory support. However, both are based on identical specs, selection totally depends upon your preference.  


  • Offers multi threaded productivity 
  • Excellent performer 
  • PCIe 4.0 support 
  • Lots of 500 Series motherboards
  • Overclockable 


  • CPU cooler is not included 
  • High MSRP 

3- Intel Core i7-11700KF Desktop Processor

Intel Core i7-11700KF Desktop Processor

Meet Intel Core i7-11700KF that is especially engineered to play. Gamers can trust it to build their gaming setup along with the latest RTX 4090. Designed with Intel’s new desktop processor architecture with fast clock speeds to deliver high frame rates and low latency. Due to the amazing feature set this processor is good to go for competitive play.

This is an octa core CPU with 3.60 GHz speed and gives you  more immersive experiences. Bring this CPU in your life so you can meet the needs of demanding applications. Along with cache memory and hyper threading you will get faster turbo boost and beautiful on board visuals. To carry and process data in flash cache memory plays an important role. 

Core i7-11700KF has 16 MB of L3 that is good enough to process data and have fast and smooth performance. Built with a 14 nm process that gives improved performance per watt and micro architecture ensures its power efficiency. With the support of Intel LGA 1200 CPU socket you have the ability to install it on PCB. This processor is designed to unleash the maximum performance so you have experience that you have never seen before. 

For durability and maximum performance it comes with enhanced power solutions. It has 14+2 DrMOS power stages, ProCool sockets, military-grade TUF components, and Digi+ VRM for stability and power efficiency. To manage heat dissipation it has comprehensive cooling including M.2 heatsink, PCH fanless heatsink, VRAM heatsink and hybrid fan headers. 


The core i7-11700KF and i5-11600KF are competitors and the i7 version outshines the i5. Core i7-11700KF is better because of 3 percent better performance and has the ability to run multi-threaded tasks simultaneously. But the Core i5-11600KF is cheaper in price. 


  • Great price and performance 
  • Multiplier unlocked 
  • Supports overclocking 
  • PCI express 4.0 


  • Worse energy efficiency 
  • High power consumption 
  • Not integrated graphics 
  • Cooler is not included 

4- Intel Core i9 -12900KS 2.50 GHz Processor

Intel Core i9 -12900KS  2.50 GHz Processor

RTX 4090 is built for next level gaming to unleash its full potential you need a compatible processor. Nothing can be better than Intel core i9-12900 KS because it is a powerhouse for computer systems. This CPU is manufactured for the next generation gaming and productivity tasks. For the improved productivity it comes with 14 MB L2 + 30 MB L3 cache. 

Cache space gives an incredible hit rate and improves the overall performance of your computer system. The i9-12900 KS is a 12 gen and built with a new architecture that is compatible with the latest innovation platforms. Addition of new specs give you better experience as well as improvements in system’s performance. Designed with the highest performance components such as PCIe Gen 5 and latest memory type DDR5. 

The i9-12900 KS contains 16 cores and 24 threads which is the combination of 8 performance cores and 8 efficient cores. Similarly the 24 threads consist of 16 performance and 8 efficient cores. This amazing combination enables you to push your gameplay. Plus, this is a overclockable processor, which means you can take out its full potential. 

The base clock speed is 2.5 GHz that can be boosted up to 5.5 GHz that is sufficient for gaming and app running too. Intel Core i9-12900 KS not only gives you the best performance. But also they take care of visuals quality in respect to this comes with a built in Intel Ultra HD graphics 770 control. Through the LGA 1700 CPU socket you can easily install it on the PCB. Recommend to use it with gaming motherboards of 600 series for better usage experience. 


Intel core i9-12900 KS and i9-12900K are 16 core processors with little difference in clock speeds. The i9-12900 KS is a newer version however, 12900K consumes up to 17 percent less power, like 125 vs 150 watts. 


  • Faster clock speeds
  • 16 cores
  • Nifty collectors tin 
  • Integrated graphics


  • Gets heat up 
  • Demands high end cooling system 

5- AMD Ryzen 7 5800X3D 8-core Desktop Processor

AMD Ryzen  7 5800X3D 8-core Desktop Processor

If you are looking for 1080p gaming and thinking about investing in an AMD Ryzen processor. Then you can get your hands on the newly released Ryzen 7 5800X3D. For this kind of gaming this CPU is famous and enables you to team up and become unbeatable. Contains 8 cores and 16 threads that support is enough for all your desktop needs. 

AMD claims that this processor comes in the category of the fastest CPUS. Due to the addition of 3D stacking technology it can tackle all the versalities of your PC. designed to get the trust of the user that the memory of the CPU can process multiple tasks  at same time. The maximum boosted speed is 4.5 GHz, which is enough to work even with a high end graphics card. 

Supports DDR-3200 memory that can tackle your instructions so you can access them quickly. To make it more powerful it has 100 MB of cache memory that also speeds up overall computing. In addition to this a desktop processor with an intelligent memory never leaves you behind. Apart from the unmatched L3 cache space all the features are fine tuned for the gamers. this CPU is also supported by AMD Radeon RX 6750 XT.

When a CPU works so efficiently it must need a proper cooling system. But the cooler is not included so before pushing its performance you must have to invest in a capable cooling system. The support of AM4 socket enables you to install it easily on PCB. Having PCI express 4.0 connectivity is a plus point for serious buyers. 


The AMD Ryzen 7 5800X and 5800X3D are members of the same series. Both designed with the similar core architecture and IPC however runs at low speed. The 5800X3D comes with a huge cache space that gives benefits in terms of performance. 


  • AM4 socket 
  • Huge amount of L3 cache 
  • Relatively affordable 


  • No DDR5 
  • Does not contain PCIe 5.0

6- AMD Ryzen 9 3950X 16-Core Unlocked Desktop Processor

AMD Ryzen 9 3950X 16-Core Unlocked Desktop Processor

Introducing a CPU that is born to perform, here is AMD Ryzen 9 3950X desktop processor. The customers of AMD love their products due to the high performance. This central processing unit is a best choice for those who are looking for a processor for rendering. No matter what is your requirement gaming or rendering to then you can blindly trust this CPU. 

Ryzen 3950X is a powerhouse and ready to cover in both situations. Bundled with 16 Cores and 32 processing threads that provides you the demanding power which you need from a mainstream desktop. Bring this CPU and get ready yourself to perform ultra fast 100+ FPS in most demanding games. While running it generates 95 degree celsius that is why it needs a proper cooling system.  

However, the CPU cooler is not included, that is why you have to invest separately for a compatible cooler. For this processor we recommend you to purchase a liquid cooler with a 280 mm fan or larger radiator. The maximum boosted speed is 4.7 GHz that you get after overclocking. Contains a 72 MB cache space that makes your CPU more efficient. And this processor supports DDR memory with up to 3200 MHz speed. 

Supports AM4 CPU socket that enables you to install it on the PCB. Plus, it supports PCIe 4.0 and allows its connectivity with the motherboard. AMD 3950X is recommended for the motherboards that are based on x570 chipset. Supported operating systems are Windows 10, Ubuntu and RHEL of 64-Bit. 


Comparing Ryzen 3950X and Ryzen 3900X we analyzed 3950X is better due to some improved specs. It is 22.81 percent faster with the inclusion of 8 cores. Besides some features these both processors work so similar. 


  • Power efficient 
  • Supports PCIe of generation 4
  • Compatible with AM4 socket 


  • Overkill for PC gamers
  • Doesn’t catch coffee lake in ST workloads

Best CPU For RTX 4090 Buying Guide 

The central processing unit is necessary for a gaming system because it improves the processing speed. When it comes to the best CPU for RTX 4090 it would not be like walking in the park. Because it is a high end graphics card from Nvidia to unleash its full potential buy a theight CPU. Above mentioned desktop processors are good to go with your chosen video card. 

On our list Intel Core i9-12900 KS Hexadeca-core is the best overall desktop processor. For someone who has a tight budget for them we recommend you to purchase AMD Ryzen 5800X3D. Below are some pointers that you can consider to shop your future CPU. 

Cores And Threads:

When you are looking for a CPU to pair up with a high end graphics card like RTX 4090. That is why you must select a processor from the top tier categories. You can choose  Core i9-12900, which comes with 16 cores and 2 threads that contains 16 performance and 8 efficient cores. Provides enough power to tackle more tasks at the same time. 

Clock Speed:

Clock speed of a CPU is necessary especially when it comes to an unlocked version. In terms of this Intel Core i7-11700KF is a better option as it has a base clock speed 3.6 GHz that is enough to proceed your instructions. This feature is also necessary to consider because it gives you an edge when you use your computer intensively. 

Cache Space:

If your purpose is to have a CPU that is more efficient then you must consider its cache space. You can go for Core i9-12900 KS as it is integrated with 14 MB L2 and 30 MB L3 cache memory. Provides sufficient hit rate to store or proceed your data or commands and ultimately your computer’s speed improves. If you want more cache than AMD Ryzen 7 5800X3D is recommended it contains 100 MB cache memory. 


We recommend you to buy a desktop processor that gives you promised performances while using less energy. This is not only important for the life of your computer system but also it reduces your electricity bill. The TDP of i9-12900 KS is 125 watts, which is fine to deliver performance of your choice as well as decrease your electricity bill.

Socket Compatibility:

While buying your future desktop processor you must look at the socket compatibility because it is necessary for its installation on PCB. check the CPU socket compatibility with your system because it will be responsible for its connection to the system. 


For the power hungrers overclocking is very important, for such gamers we recommend buying an unlocked processor.  Intel Core i9-12900 KS is unlocked which means it is ready for overclocking. By pushing up its base clock speed you can get 5.5 GHz as the maximum boosted speed. 


How Many Cores Matter For Gaming?

As far as the number of cores is up to your budget, if you have a low budget you can minimum 4 cores will be fine otherwise for the best performance buy a processor with 6 cores. 

Does A Better CPU Increase FPS?

Yes if you pair up your graphics card with a right processor you can  have a 40 percent increment in FPS. 

What CPU Speed Will Be Good For Gaming?

For gaming a processor with 3.5 GHz or above will be ideal. 

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