In the process, we will also take a look at their clock speeds, power consumption, and CPU temperatures. If you are looking to purchase a new CPU, then we hope that this guide could help you make a better buying decision.
A Brief Note on Intel Core i9 13900K
In October 2022, Intel launched the 13th Gen processors with code name Raptor Lake. In this line up, the Core i9 13900K is an expensive, top-of-the-line processor with a price tag of $589. But it is subsequently dethroned by Intel Core i9 13900KS. Similar to the previous gen’s counterpart, the Intel Core i9 12900K, the 13900K also has 8 Performance (P) Cores with support for multithreading. But the efficiency cores doubled. While the 12900K has only 8 Efficiency (E) Cores, the Intel i9 13900K has 16 Efficiency (E) cores. As efficiency cores doesn’t support multithreading, the Intel Core i9 13900K has a total 32 threads (16 P + 16 E). The microarchitecture of the 13th Gen CPUs are the updated Raptor Cove P Cores and Gracemont E Cores. The base clock speed of the P and E Cores of 13900K are 3 GHz and 2.2 GHz respectively. The turbo clocks of P and E Cores are 5.4 GHz and 4.3 GHz respectively. Intel made the 13th gen Raptor Lake processors using the same LGA 1700 Socket as the 12th Gen Alder Lake CPUs. So, if you have a decent motherboard, then the upgrade cost will be less. The Intel Core i9 13900K CPU supports both DDR4 and DDR5 RAM types in dual channel mode. While the DDR4 frequency is only DDR4-3200, DDR5 saw a huge improvement with support for DDR5-5600. If you already own a decent DDR4 RAM kit, then you don’t need to make a significant investment. But the industry is moving towards DDR5 and the cost of DDR5 RAM kits is slowly coming down. Coming to the cache layout, each P core of the 13900K Processor gets 2 MB L2 Cache and one module of E cores gets 4 MB L2 Cache. Speaking of E Core modules, Intel grouped four E Cores into a cluster that share the L2 cache. So, in 13900K, you get 4 MB for four E Cores. This makes the total L2 Cache of 13900K at 32 MB. It also has 36 MB L3 Cache, which is common for all the cores. The Intel Core i9 13900K processor has 20 PCIe lanes from the CPU. Of these, 16 are PCIe Gen 5 while the remaining 4 are Gen 4. The final configuration of the PCIe lanes will depend on the motherboard you select and the corresponding chipset. Similar to the Alder Lake processors, even the 13th Gen Raptor Lake processors are fabricated using the “Intel 7”. Even though Intel calls it “Intel 7”, it is technically a 10 nm node. The base processor power of Intel Core i9 13900K CPU is 125W while the maximum turbo power is 253W.
Important Specifications of Intel Core i9 13900K
8 P Cores, 16 E Cores and total 32 Threads LGA 1700 Socket Supports both DDR4 and DDR5 Cache: Total L2 Cache is 32 MB [2 MB per P Core (8 * 2 MB = 16 MB) 4 MB per E Core Module (4 * 4 MB = 16 MB)], Total L3 Cache is 36 MB Total 20 PCIe Lanes (16 PCIe 5.0 Lanes and 4 PCIe 4.0 Lanes) Intel UHD 770 Integrated Graphics Base Power is 125 Watts and Turbo Power is 253 Watts Manufacturing Node is Intel 7 (based on 10 nm Enhanced SuperFin)
A Brief Note on AMD Ryzen 9 7900X
While the AMD Ryzen 9 7950 is a $699 top-of-the-line CPU in the AMD Ryzen 7000 Series, the AMD Ryzen 9 7900X is $150 less and looks like the most value-oriented processor. Even though Intel and Apple started designing processors using a hybrid architecture, AMD struck with their tried-and-tested “all powerful cores” for their Zen 4 based Ryzen 7000 Series CPUs. Specifically, the AMD Ryzen 9 7900X has 12 cores and 24 threads. Speaking of Zen 4, AMD completely revamped the architecture with Zen 4 that has 13% better IPC performance than previous generation architecture. With this new architecture, AMD had to let go of their popular AM4 socket and bring in a new AM5 Socket. Another thing AMD is popular is for their “Chiplet” designs. In the AMD Ryzen 9 7900X, the CPU consists of 3 chiplets, two of them are the Core Complex Dies (CCD) with 6 cores each and one Input – Output Die (IOD). Under the hood, each CCD consists of 8 CPU Cores. But in case of the AMD Ryzen 9 7900X, AMD disables two cores in each CCD. The AMD Ryzen 9 7950X has the same CCDs but utilizes all the 8 CPU Cores per CCD. In order to keep the cost down, AMD designed the CCD using TSMC 5 nm node and the IOD using TSMC 6 nm node. There are some big changes in terms of memory a well. Unlike Intel’s 13th Gen CPUs that support both DDR4 and DDR5 memory, AMD made their Zen 4 CPUs compatible with only DDR5 memory. Coming to the L2 Cache of the AMD Ryzen 9 7900X, it has L2 Cache of 1 MB per core. So, this makes the total L2 Cache of AMD Ryzen 9 7900X at 12 MB (12 * 1 MB). Coming to the L3 Cache, AMD divided this into two sections based on the Core Complex Dies i.e., each CCD Module gets 32 MB of L3 Cache. So, the total L3 Cache of the AMD Ryzen 9 7900X is 64 MB (1 * 32 MB).
Important Specifications of AMD Ryzen 9 7900X
12 Cores 24 Threads AM5 Socket Supports only DDR5 Memory Cache: L2 is 1 MB per core (Total 12 MB) and L3 is 32 MB per CCD (Total 64 MB) Total 28 PCIe 5.0 lanes (4 of them are reserved for chipset) RDNA2 based Integrated Graphics (base clock of 0.4 GHz and boost clock of 2.2 GHz) TDP is 170 Watts Manufacturing Node is TSMC 5 nm for CCD and TSMC 6 nm for IOD
Specifications: Intel Core i9 13900K vs AMD Ryzen 9 7900X
In the following table, we made a side by side list of all the essential
Comparison: Intel Core i9 13900K vs AMD Ryzen 9 7900X
Let us now compare the performance of the Intel Core i9 13900K CPU against the AMD Ryzen 9 7900X. (8 * 2 MB = 16 MB) 4 MB per E Core Module (4 * 4 MB = 16 MB) 4 PCIe 4.0 Lanes
Test System
Before we begin, here is a quick look at our Intel and AMD test systems.
Application Benchmarks
Cinebench R23 Multi-Core (Higher is Better)
Let us start with the most popular benchmark tool, the Cinebench R23. After the 10-minute multicore loop test, the Intel Core i9 13900K got a score of just under 40000 points while the AMD Ryzen 9 7900X got just over 29000 points. So, if you compare the performance of Intel Core i9 13900K and AMD Ryzen 9 7900X, then the former boasts a 35% performance improvement.
Cinebench R23 Single-Core (Higher is Better)
Coming to the single core performance in the Cinebench R23, there is no change in the storyt. The single-core performance of the Intel Core i9 13900K is 10% better than the AMD Ryzen 9 7900X.
PassMark’s CPUMARK 10.2 Multi-Threaded/Overall (Higher is Better)
Next, we have another popular benchmark tool from PassMark, the CPU Mark. The following results show the overall or multi-threaded CPU Mark Score of all the processors in this test. In this test, the Intel Core i9 13900K shows a 18% performance boast over the AMD Ryzen 9 7900X.
PassMark’s CPUMARK 10.2 Single-Threaded (Higher is Better)
Coming to the single threaded performance in CPU Mark, the story continues as the flagship from the Intel 13th gen shows its dominance. The Intel Core i9 13900K beats the AMD Ryzen 9 7900X by 8%.
Blender Open Data Render Time (Lower is Better)
Another popular open-source tool is Blender. For the next couple of tests, we will see the render times and number of samples per minute in Blender version 3.4. The Intel Core i9 13900K took 20 seconds over 6 minutes while the AMD Ryzen 9 7900X took 7 minutes and 30 seconds.
Blender Samples Per Minute (Higher is Better)
The results for number of samples in a minute for Blender Render is also very similar to the render time results where the Intel Core i9 13900K has a good lead over the AMD Ryzen 9 7900X. Here you can see the samples per minute score across the three test scenes: monster, junkshop, and classroom.
Adobe Photoshop 2022 Puget System Benchmark (Higher is Better)
The Adobe suite has a couple of important tools that many creators and artists use. We will start with the Adobe Photoshop 2022. It has a built-in Puget System Standard Benchmark. If you look at the overall scores, the Intel Core i9 13900K has a significant lead over the AMD Ryzen 9 7900X.
Adobe Premier Pro 2022 Puget System Benchmark (Higher is Better)
Next application in the Adobe suite is the Premier Pro 2022. The performance gap between the AMD Ryzen 9 7900X and the Intel Core i9 13900K is about 6% in favor of the latter.
7-Zip File Manager Compression (Higher is Better)
One of the popular and widely used open-source applications is the 7-Zip File Manager. It helps in archiving files. For this test, we are performing the built-in benchmark feature. Here is the result in million instructions per second (MIPS) for compressing using a standards 32 MB dictionary size and 10 passes.
7-Zip File Manager Decompression (Higher is Better)
In decompression, the AMD Ryzen CPUs dominate the charts with AMD Ryzen 9 7950X and Ryzen 9 5950X comfortably beating the Intel Core i9 13900K. But between the Intel Core i9 13900K and the AMD Ryzen 9 7900X, the former boasts a 7% performance gain.
Chromium Code Compilation Time (Lower is Better)
Developers working on large projects need a stable multi-threaded system with a powerful CPU. So, we tested the code compilation performance by taking the open-source Chromium project code. The performance of Intel Core i9 13900K is very good but ultimately falls short in front of the AMD Ryzen 9 7950X. The AMD Ryzen 9 7900X 4-1/2 minutes more than the Intel Core i9 13900K.
Corona 1.3 Render Time (Lower is Better)
The last “application” benchmark is the Corona 1.3, which is a high-quality shading engine for production rendering. Let us now see the rendering time of different Intel and AMD CPUs. While the Intel Core i9 13900K finished the render in just 38 seconds, the AMD Ryzen 9 7900X took 50 seconds.
Gaming Benchmarks
Let us move to some gaming performance. We tested some popular titles at a resolution of 1920 × 1080 (1080p) as anything beyond, the GPU will dominate the performance. We are running all the games in DirectX 12 with Ray Tracing and DLSS off.
Far Cry 6
Resolution: 1920 × 1080 DirectX 12 Game Setting: Ultra DirectX Raytracing: Off
The first game is Far Cry 6. Here, the Intel Core i9 13900K shows its dominance over AMD counterparts as the AMD Ryzen 9 7900X struggles to go past 150 fps while the Intel Core i9 13900K could easily crack the 170 fps mark. Here are the rounded off average frames and also 1% low fps.
Cyberpunk 2077
Resolution: 1920 × 1080 DirectX 12 Game Setting: Ultra Texture: High Ray Tracing: Off DLSS: Off
Next, we have another popular title, Cyberpunk 2077. The story is the same, where current gen Intel CPUs can pump over 140 fps on average with the Intel Core i9 13900K leading while the Ryzen 7000 Series CPUs struggle to push past 130 fps.
Shadow of the Tomb Raider
Resolution: 1920 × 1080 DirectX 12 Game Setting: High DLSS: Off
Last but not least, we tested the Shadow of the Tomb Raider. The AMD Ryzen 9 7900X put up some fight but ultimately fall short of the Intel Core i9 13900K. What surprised in this game is the AMD Ryzen 7 5800X3D beating all the current gen Intel and AMD flagships. Based on this result, we are very excited to get our hands on the upcoming Ryzen 7000 Series CPUs with 3D V-Cache.
Clock Speed
We ran the AIDA64 Stress Test for 10 minutes and here are the maximum frequency and average frequency of all cores.
CPU Temperature
During the same AIDA64 Stress Test, we monitored the CPU Temperatures with Corsair iCUE H150i RGB Elite Liquid CPU Cooler. Here are the CPU temps for your reference.
Power Consumption
During the Blender render, we measured the CPU Package Power Draw using the HWiNFO tool. The following table consists of the peak CPU Package Power Draw as reported by HWiNFO.
Which One Should You Buy, Intel Core i9 13900K or AMD Ryzen 9 7900X?
With a retail price of $640 and the performance it offers, the Intel Core i9 13900K seems like a decent CPU from Intel. But if you take a look at the power consumption and the thermals, we are no impressed as it is the hottest and most power-hungry CPU in this test. For a one-on-one comparison, the Intel Core i9 13900K is a superior processor than the AMD Ryzen 9 7900X both in terms of gaming and productivity. While the AMD Ryzen 9 7900X ran cooler and consumes 130 Watts less, it doesn’t put up much competition in front of the Intel Core i9 13900K. If your workload involves multithreaded applications that need a lot of CPU computational power, then instead of the AMD Ryzen 9 7900X, you can consider the AMD Ryzen 9 7950X even though it costs $150 more. In several applications and in some games, the AMD Ryzen 9 7950X came very close to the Intel Core i9 13900K. When it comes to gaming, the performance difference between the Intel Core i9 13900K and the Intel Core i7 13700K is very less. The latter runs a little cooler while consuming less power. So, if gaming is priority, then you can save a lot by considering either the Intel Core i7 13700K or even the Intel Core i5 13600K (which we did not test here). Comment * Name * Email * Website
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