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

Your high end graphics card needs to be paired with a worthy partner and that got us thinking to bring a category of the best CPU for RTX 4090. Having specific needs in your mind does not mean you are being too demanding. But it helps you find the appropriate processor because you deserve it. When you are spending a bulk of money on the latest card, it is our duty to help you and suggest the right gaming CPU for that matter.

So we have some of the famous picks in this category starting from their cores and thread count. From 16 cores and 32 threads as the highest number found in Intel core i9-12900KS, we also have the basic 8 cores 16 threads from Ryzen 7 5800X3D. One being the hexadeca core processor that might be overkill if you are using the card just for games, the other is known as incredibly suitable for gaming.

Moving towards the memory, we can get 25Mb of L3 cache to 100Mb as seen in core i7-12700KF and Ryzen 7 5800X3D respectively. The thermal power is around 105 to 125W as all such functions need fuel to run. We also suggest you get a 500W to 700W of PSU in order to build your high end rig. The support of LGA 1700 and AM4 platform with x570 and B550 motherboards increases the compatibility of your CPU.

You can connect these with the recent and latest motherboards present in the market. Furthermore, the cores can also be smart ones based on P and E cores as seen in core  i7-12700KF. They are programmed to be more precise and task oriented as compared to simple thread and core count. Some of these CPUs might also have integrated graphics so they will be able to deal with basic graphical needs like light productivity.

Our Recommended list of the Best CPU For RTX 4090

  1. Intel Core i9-12900KS Processor
  2. AMD Ryzen 9 3950X 16-Core, 32-Thread Unlocked Desktop Processor
  3. Intel Core i7-11700KF Desktop Processor
  4. AMD Ryzen 9 5950X 16-core, 32-Thread Unlocked Desktop Processor
  5. Intel Core i7-12700KF Desktop Processor
  6. AMD Ryzen 7 5800X3D 8-core, 16-Thread Desktop Processor
  7. Intel Core i9-10900KF Desktop Processor

Geforce RTX 4090 CPU Requirements:

  • Minimum 8 cores
  • Up to 5.5 GHz can be achieved but other cores should be shut down completely
  • A cooler selection is a must if the CPU does not come with one.
  • Latest socket compatibility is important for connecting it with the motherboards
  • Cache should be at least 25Mb. Maximum 90 Mb

AMD vs Intel:

In the battle of which is better in processor selection, only these 2 names will appear in the market: Intel and AMD.

  • Intel’s alder lake chips are the latest to take the crown of gaming from AMD.
  • Intel has been more experimenting with their newest releases and is more innovative.
  • AMD’s Ryzen 7 5800X3D is the latest CPU that comes with 3D Vcache technology.
  • Ryzen 5000 series including 5950x, 5900x, 5600x etc were the highest chips in the market. They also beat intel in every metric such as gaming, applications, power consumption etc.
  • Intel’s alder lake release turned the tables completely and made everything in favor of team Blue.
  • Some users believe that Intel is best known for gaming while AMD is more into other tasks like editing, deep learning etc.

1- Intel Core i9-12900KS Processor

Intel Core i9 (12th Gen) i9-12900KS Processor

Being the flagship chip from Intel, Core i9-12900 KS has got the attention of many users because it promises to make your GPU push to work faster. Based on the 12th generation Alder Lake, we have 16 cores based on 8 P-cores that are known for their performance. Other 8 E-cores that will be used for high efficiency in various tasks with a total cache of 30Mb. There is no doubt that this processor demands its price for the benefits it is going to give to the user.

On the brighter side, you can now get up to 5.5 GHz specifically when 2 of the P-cores are at top speed. The heavier the load gets over 2 cores, the more speed you can get out of this CPU. But the rest of the cores will be shut down entirely for such demanding GHz to drop out and go into your system command. This feature gives an edge to the CPU even if many applications might not use such power.

Speaking of power, a total of 150W is consumed by 12900KS for maintaining the higher clock speeds. Coming with integrated UHD graphics 770, you might not need to consider a separate GPU for non gaming tasks. But, obviously for gaming, it should be paired with the very best as Nvidia releases 4090. Also thanks to the DDR5 memory support 4800 and DDR4 3200 to make this a greatest invention in the tech world.


There is a 300MHz boost from the core i9-12900 K’s clock speed of 5.2GHz as compared to i9-12900 KS. Even though the KS version has higher demands for power and thermal solutions, it still has a benefit for speed over the base model. The rest of the features are almost the same with price speculation to be significantly higher from the base model. KS uses 150W of power while K only consumes 125W.


  • 16 core design
  • Integrated graphics
  • Faster clock speeds
  • Can reach up to 5.5GHz


  • Can run hot
  • Big price difference from 12900K model
  • Need high end cooler
  • Not bundled with cooler

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

AMD Ryzen 9 3950X 16-Core, 32-Thread Unlocked Desktop Processor

One of the top processors that has got the attention of many is the 3950X by AMD Ryzen 9 version. This is a CPU that should be paired with the absolute best card that has a royal tag such as rtx 4090 price. They will both give great value because of such a deadly combination. Starting from 16 cores and 32 thread design, AMD has put great thought on making this CPU come into action. this CPU is also perfect for cryptocurrency.

It can be chosen as a mainstream desktop processor because not only is it great for multi-threaded performance, but also for advanced gaming as well. For delivering 100+ FPS gain, you can choose the world’s most popular games and still not be disappointed with this one. Even the box says it is built for performance and designed to win which shows that the brand was not kidding. Although it is not bundled with a cooler, we suggest you use a 280mm liquid cooling system for keeping extra heat out.

When gaming and multiple tasks are involved, there is no doubt that your system will heat up at some point. So choosing the appropriate cooling system is important and after we are done doing that, we can focus on what more we can gain from this CPU. Especially for overclocking, 4.7 GHz of maximum boost is unlocked as well with 72MB of massive cache and DDR-3200.

As it starts from a base clock of 3.5GHz, you can pair this CPU with AM4 based platforms or most of the x570 motherboards. Its TDP reaches 105 watts for covering all the power that is needed for as many tasks you put on it as possible.


For both CPUs, Ryzen 9 3950X can be seen side by side with Ryzen 5 3500 especially in gaming performance. After testing, the former processor outperforms with an advantage of 17% in CyberPunk 2077. It also is great in multi-threaded tasks because of more cores whereas Ryzen 5 3500 consumes 38% less energy than 3950X.


  • Native PCIe gen 4.0
  • Decent TDP
  • AM4 socket motherboard compatible
  • Fastest prosumer CPU
  • Great value for price and performance


  • Can be an overkill for gamers
  • Extra PCIe lanes
  • Single core performance is not great

3- Intel Core i7-11700KF Desktop Processor

Intel Core i7-11700KF Desktop Processor

The support of LGA 1200 socket is how you will be getting your bases right before getting into anything big. Once you make the perfect pair with the right graphics card, it is time to notice the power efficiency and other factors. Intel has based this processor with 8 cores and 16 threads. Having 3.60 GHz as the base clock speed, it offers more cache for multiple threading actions.

Some applications have demanding commands and this architecture is able to deliver performance in high end tasks and faster turbo boost. The 16Mb L3 cache has the appropriate space for giving a flashing smooth rate. Thanks to the 14nm micro architecture that is also responsible for improving per watt performance. With enhanced power solution, 14+2 DrMOS power stages, military grade components and ProCool sockets are placed for maximum durability.Intel Core i7-11700KF is also compatible with Radeon RX 6950 XT CPU and this is also perfect for gaming PC .

On top of that, 125W of power consumption is the total usage of this CPU to get it ready for action. Up to 5.0GHz boost clock is used for unlocking the true potential of this processor for keeping up with the modern tech world. When you have paired high end components, it is better not to forget about the comprehensive cooling. This feature includes VRM heatsink, M.2 heatsink, Hybrid fan headers and Xpert 4 utility and PCH fanless heatsink for maximum thermal control. 


To determine how good the Core i7 11700KF is, we compare it with its predecessor 11700K. Upon various tests and hypotheses by tech experts, they come to the conclusion that the KF version is 20% faster than the K version. On its counterparts, this processor is also compared to AMD 5800x. So all in all, i7 11700KF will be more than enough for your tasks that may involve multitasking, running 3D applications, modern AAA games, photo and video editing etc.


  • Solid performance in all fields
  • Overclockable
  • PCIe 4.0 lanes


  • Lacks of integrated graphics
  • Thermal velocity absence
  • Adaptive boost is not present

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

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

From the very basics of technology, AMD has put its one of the most famous CPUs into the market. The user must get one of the top notch processors for the gaming needs they might have. Thanks to Ryzen 9 5950x that is based on 16 cores and 32 threads for getting creators excited for their work to get on track. Once we dive deeper into the specifications of this machine, we get to know that it stacks against Zen 2 generation.

Being on the edge of AMD’s HEDT, this processor does not require a specialized chipset and motherboard socket. It will work with any AM4 supported platform and also gives chances to PCIe 4.0, X570 and B550 motherboards. The user also has to get a cooler for keeping the thermal power under control. For delivering elite performance in 100 plus FPS games, the addition of 4090 graphics cards is also supported by RTX 3080 Ti and RTX 3070 Ti.

All the advanced socket platforms will be able to support with the help of this programming CPU such as AM4. Moreover, maximum boost for your system is brought up to 4.9 GHz because this machine is unlocked for overclocking. With the 72Mb of cache, you get to see DDR-3200 support is something that should not be overlooked. Having 105 watts of power consumption  is able to get around with a mid tier power supply unit.


Among the key differences between Ryzen 9 5950X and Ryzen 5 3600, here are some of the commonly found ones. Upon testing through some specific game parameters, we get to know that even though Ryzen 5 3600 is buck banging, Ryzen 9 5950X is better in performance. Chasing the scores in Valorant, 5950X has 25% more advantage over 3600 as well as being brilliant in multi threaded CPU.


  • Low TDP
  • Strong bond with gaming titles
  • Incredible productivity as compared to price
  • Can outperform Intel HEDT


  • Lightly threaded titles are not that great
  • 12 cores version may get more attention among users
  • Does not come with cooler

5- Intel Core i7-12700KF Desktop Processor

Intel Core i7-12700KF Desktop Processor

There is a revolution coming on with the launch of Intel core i7 -12700KF and that has its roots in multitasking performance. Starting with higher clock speeds, this architecture is capable of pushing your gameplay to the farthest. Up to 5.0GHz can be achieved as the maximum boost your system needs. From 12 cores and 20 threads, the brand has divided them into sub core sections.

Bring your focus on 8 performance or P-cores and 4 Efficient or E-cores that are designed for single threaded works and multi threaded performance respectively. Also, the hybrid architecture is the reason why the brand has subdivided the cores to run all the tasks more smoothly. In addition, Intel’s thread director is known for managing the workloads and prioritizing them for the task in need. This CPU is compatible with AMD RX 6500 XT CPU , Radeon RX 6750 XT, and these are also unlocked for overclocking purposes which means that you can get more from what is promised.

Being compatible with the latest platforms is one of the top tier improvements that has been added in this machine. With the support for PCIe Gen 5 and DDR5 memory, you become unbeatable. The addition of thunderbolt 4 and Intel Wi-Fi killer 6/6E has made delivery of various transfers the fastest in tech history. There are separate overclocking controls for all types of cores.


We can only compare this one with the worthy opponent that is the 12700K version so here are 2 CPUs with 12 cores. By looking at the single core performance, Both of these have almost the same performance. Intel core i7 12700K comes with an integrated GPU whereas the KF version lacks it.


  • Incredible performance ratio
  • Gaming performance is unbeatable
  • Affordable with latest features
  • Extremely fast productivity


  • High cost platform
  • Can get hot 

6- AMD Ryzen 7 5800X3D 8-core, 16-Thread Desktop Processor

AMD Ryzen 7 5800X3D 8-core, 16-Thread Desktop Processor

After the rtx 4090 release date, many users were concerned about getting a capable processor which will uphold the top tier card. Nothing came forward as bold as Ryzen 7 5800X3D packed with a punch. It is known as one of the world’s fastest desktop processors for a reason specifically targeting gamers. With 8 cores and 16 threads, it is finely tuned for modern games.

Up to 4.5GHz of clock speed is approachable to the users with massive memory support as well. The manufacturers have defined it as an easy step towards leading game performance through AM4 motherboards. You can now upgrade your current processor with this rig to advance your approach towards the gaming market. Most games love fast access to memory and this is what this CPU has targeted the most.

There is a reason most of tech experts use it as a bait or more likely as a testing processor because of its overall performance. The addition of 3D V-cache technology offers 96MB of L3 cache. This massive space for the processor is directed towards the DRAM memory access and gives you 5x leverage. While so much power is to offer, it only uses 105 W of power itself that is quite a shock to a lot of users.


Core i0-12900K is no different than Ryzen 7 5800X3D but there are some minor to major differences that can be seen. Although they both offer almost the similar gaming experience, the latter CPU has incredibly good value for gaming. It is also 30% lower and its memory is quite enough to see its full potential.


  • Massive L3 cache
  • SMT support
  • Ideal for gaming and testing
  • Zen 3 CPU cores


  • Not unlocked for overclocking
  • Pricey as compared to Older Ryzen 7 chips

7- Intel Core i9-10900KF Desktop Processor

Intel Core i9-10900KF Desktop Processor

From one of the top processors in the list, Intel has yet again made history by releasing the Core i9-10900KF. Being the expert of desktop CPU, the brand has added 10 cores and 20 threads for all the tasks you want to be done. Be it single handing tasks like gaming or productivity or multithreaded ones with heavier workloads, this CPU has got it all. The LGA 1200 socket type is how this masterpiece is going to be connected with the rest of the system.

Its base clock speed is 3.7GHz whereas the maximum turbo boost you can achieve is 5.3GHz. This unlocked version makes overclocking possible for Intel through this processor. Being compatible with Intel 400 series based motherboards also makes your board selection easier than before. Many users might get the benefit of maximum boost, therefore, Intel turbo boost technology 3.0 is here to serve you.

Consuming 125W seems justified when it has so much boost to offer as well as Optane memory support is also working in the background. Such tuning flexibility is also unlocked with overclocking controls as an additional token. Now you can get all the hyper threading technology and multiple tasks getting done, all under the same roof.


One of the closest competitors of Intel core i9-10900 KF is AMD’s Ryzen 7 3800X and some of the differences have been noticed. After some tough workloads and benchmark testing, we get to see that the Intel is recently released and relatively new in the market. It has more physical cores and an 18% higher Turbo boost frequency than Ryzen 7 3800X. On the other hand, Ryzen 7 3800x has the latest manufacturing process and newer PCIe version 4.0 plus 4% higher bandwidth of memory.


  • Incredible for gaming
  • Superior all core boost
  • Relatively latest in market
  • Excellent multitasking performance
  • Great all core base speed


  • Consumes more TDP
  • Outdated process for thermal control
  • Does not come with a cooler

Tested Best CPU For RTX 4090 Buying Guide

If you have a specific card in mind like the RTX 4090, your selective cooler is most likely to be the one that will give you the best potential of both devices. From our list of products, we have Intel core i7-12700KF for keeping up with your tech world. You need to choose your right motherboard and a cooler as well if your selected one is not bundled with. There should be something that has got your back when things start to heat up.

Clock Speeds:

There are 2 speeds that are often seen in a processor in which base clock speed means the average of your tasks being done. The boost clock speed means you can push your system as far as this feature enables you to. So it can start from 3.60GHz up to 5.0GHz and more depending on your model as well. It allows the user to determine the kind of speed they want from their system.


Intel CPUs are often supported with LGA 1200 and 1700 sockets whereas AMD CPUs are AM4 platform supportive. This feature is important because the socket is responsible for attaching your system with the board or the rest of the rig. It better be compatible otherwise you have to get a new motherboard for your CPU or stick to the older processor for that matter.


Your processor memory is where all the commands will be sent towards the tasks. It will have an L3 cache that should be big enough to deal with all the workings of your CPU and it can get 100Mb as seen in Ryzen 7 5800X3D. But with the addition of Intel 3D V-cache and smart cache, we can deal with whatever is thrown at our CPU.


This is the maximum power your processor is going to take from the power supply unit. It should not be too much as it can suck up all the fuel and increase your electricity bill or not too little that it drowns in the middle of intense moments. From 105W to 125W is sort of acceptable when you are seeking high end performance.

Cores And Threads:

At first, the cores and threads used to be simple as 8 cores and double the number of threads but recently the smart cores have evolved. They offer Performance and Efficient cores as the sub section division for more precise outcome. Such cores will determine which tasks need single handling etc.


Does The CPU Matter For RTX?

For processing logic in your games, a CPU has the utmost importance because it deals with the FPS through its cores. So at least 6 cores should be present in Intel or AMD’s processor in case you are thinking of getting RTX 3080 or above.

Can CPU Affect FPS?

Your CPU’s processing power is directly related to the effect in your FPS. An upgrade to the modern CPU will give you a slight edge over the gaming performance as well.

Do You Need A Fast CPU For Gaming?

A simple answer is yes because the type of performance you are expecting from your CPU also depends on fastness.  Other features also matter including at least 8Gb RAM.

Also See:

Leave a Comment