Performance
Core i9-11900K229% better
20,66256% of 36,991
Core i5-6400
6,28317% of 36,991
The Core i9-11900K has 229% better performance than the Core i5-6400 for the 3DMark 11 Performance Physics benchmark.
Performance per dollar
Core i9-11900K11% better
38.3332% of 121.53
Core i5-6400
34.5228% of 121.53
The Core i9-11900K has 11% better value for the money than the Core i5-6400 for the 3DMark 11 Performance Physics benchmark.
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Summary
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About the Intel Core i9-11900K CPU
The Intel Core i9-11900K is an end-of-life 8-core (16-thread) processor built for the desktop CPU market. It launched in Q1 2021 with a suggested retail price of $539. It is part of Intel's Core i9 lineup, which is based on the Rocket Lake-S microarchitecture. The i9-11900K is compatible with Intel Socket 1200 motherboards and is fabricated on Intel's 14 nm manufacturing process. It features the UHD Graphics 750 integrated graphics solution.
Memory and Cache
The Core i9-11900K supports DDR4 memory and features a dual-channel memory controller, allowing it to utilize 2 memory modules simultaneously. In terms of cache, the Core i9-11900K has multiple levels of cache. Its L1 cache, which is the smallest and fastest, is 80 KB in size, providing rapid access to crucial instructions. Its L2 cache, at 512 KB, is larger but slower than the L1. Its L3 cache, a shared resource among the CPU's cores, has a capacity of 16 MB.
Cores and Clock Speeds
The Core i9-11900K features 8 total cores which can process 16 threads simultaneously. The multi-threading capability allows the CPU to execute multiple computational tasks in parallel. The base clock speed of the CPU is 3.5 GHz, and it can boost up to 5.3 GHz under heavy workloads. Higher clock speeds result in better performance for the same microarchitecture. The multiplier is unlocked, enabling overclocking for those seeking to push the CPU's performance further.
Integrated Graphics
The Core i9-11900K includes an integrated graphics solution called UHD Graphics 750. This graphics processor is directly integrated into the CPU and is not as powerful as a dedicated graphics card. While integrated graphics can handle basic tasks like web browsing and office applications, it is not suitable for more demanding activities such as gaming or video editing, where a dedicated graphics card offers superior performance.
Benchmark Performance & Value
The Core i9-11900K has the 66th best 3DMark 11 Performance Physics score among the 721 benchmarked CPUs in our database. It achieves 55.86% of the performance of the best benchmarked CPU, the AMD Ryzen 9 7950X3D. Its 20,662 score and $539 launch price (MSRP) gives it a performance per dollar of 38.33. This is the 83rd best in value for the 3DMark 11 Perf. Physics benchmark.
About the Intel Core i5-6400 CPU
The Intel Core i5-6400 is an end-of-life 4-core (4-thread) processor built for the desktop CPU market. It launched in Q3 2015 with a suggested retail price of $182. It is part of Intel's Core i5 lineup, which is based on the Skylake microarchitecture. The i5-6400 is compatible with Intel Socket 1151 motherboards and is fabricated on Intel's 14 nm manufacturing process. It features the HD Graphics 530 integrated graphics solution.
Memory and Cache
The Core i5-6400 supports DDR4 memory and features a dual-channel memory controller, allowing it to utilize 2 memory modules simultaneously. In terms of cache, the Core i5-6400 has multiple levels of cache. Its L1 cache, which is the smallest and fastest, is 64 KB in size, providing rapid access to crucial instructions. Its L2 cache, at 256 KB, is larger but slower than the L1. Its L3 cache, a shared resource among the CPU's cores, has a capacity of 6 MB.
Cores and Clock Speeds
The Core i5-6400 features 4 total cores which can process 4 threads simultaneously. The multi-threading capability allows the CPU to execute multiple computational tasks in parallel. The base clock speed of the CPU is 2.7 GHz, and it can boost up to 3.3 GHz under heavy workloads. Higher clock speeds result in better performance for the same microarchitecture. The multiplier is locked, making it incapable of overclocking for pushing performance further.
Integrated Graphics
The Core i5-6400 includes an integrated graphics solution called HD Graphics 530. This graphics processor is directly integrated into the CPU and is not as powerful as a dedicated graphics card. While integrated graphics can handle basic tasks like web browsing and office applications, it is not suitable for more demanding activities such as gaming or video editing, where a dedicated graphics card offers superior performance.
Benchmark Performance & Value
The Core i5-6400 has the 374th best 3DMark 11 Performance Physics score among the 721 benchmarked CPUs in our database. It achieves 16.99% of the performance of the best benchmarked CPU, the AMD Ryzen 9 7950X3D. Its 6,283 score and $182 launch price (MSRP) gives it a performance per dollar of 34.52. This is the 102nd best in value for the 3DMark 11 Perf. Physics benchmark.
General Info
General overview of the CPU, including details like its manufacturer, release date, launch price, and current production status.
| Info | Core i9-11900K | Core i5-6400 |
|---|---|---|
| Manufacturer | Intel | Intel |
| Series | Core i9 | Core i5 |
| Market Segment | Desktop | Desktop |
| Release Date | Q1 2021 | Q3 2015 |
| Launch Price (MSRP) | $539 | $182 |
| Production Status | End-of-life | End-of-life |
| Shop | Check Price | Check Price |
Benchmark Performance
#
Performance
Core i9-11900K229% better
20,66256% of 36,991
Core i5-6400
6,28317% of 36,991
The Core i9-11900K has 229% better performance than the Core i5-6400 for the 3DMark 11 Performance Physics benchmark.
The Core i9-11900K is ranked 66th with a score of 20,662, and the Core i5-6400 is ranked 374th with a score of 6,283.
Performance per dollar
Core i9-11900K11% better
38.3332% of 121.53
Core i5-6400
34.5228% of 121.53
The Core i9-11900K has 11% better value for the money than the Core i5-6400 for the 3DMark 11 Performance Physics benchmark.
The Core i9-11900K is ranked 83rd with a performance per dollar of 38.33, and the Core i5-6400 is ranked 102nd with a performance per dollar of 34.52.
Relative Performance
The average score in the benchmark test can be compared to similar CPUs to assess relative performance. Generally, powerful CPUs tend to have higher scores.
Choose Baseline CPU:Core i9-11900K or
| CPU | Benchmark Performance | |
|---|---|---|
| Ryzen 9 5900X | 21,043.5 | +2% |
| Ryzen 9 3950X | 21,016 | +2% |
| Core i9-11900K | 20,662 | |
| Core i9-10980XE | 20,452 | -1% |
| Ryzen 7 5700X | 20,010 | -3% |
| Core i5-2500K | 6,571 | -68% |
| Core i5-4460 | 6,499 | -69% |
| Core i5-6400 | 6,283 | -70% |
| Ryzen 3 1200 | 5,975 | -71% |
| Core i5-3470 | 5,575 | -73% |
Relative Value For Money
The average performance per dollar in the benchmark test can be compared to similar CPUs to assess relative value. A higher score implies a better value for your money.
Choose Baseline CPU:Core i9-11900K or
| CPU | Performance Per Dollar | |
|---|---|---|
| Core i7-11700K | 43.42 | +13% |
| Core i9-10900K | 40.1 | +5% |
| Core i9-11900K | 38.33 | |
| Ryzen 9 5900X | 38.33 | -0% |
| Ryzen 9 3900X | 37.94 | -1% |
| FX-8350 | 36.33 | -5% |
| Core i5-4460 | 34.75 | -9% |
| Core i5-6400 | 34.52 | -10% |
| Core i7-3770 | 34.18 | -11% |
| Core i5-3550 | 33.98 | -11% |
Benchmark Scores
This table showcases the average performance scores achieved by both CPUs across industry-standard benchmark tests. These scores provide a valuable insight into overall performance. Powerful CPUs tend to have higher scores.
- Popular
| Benchmark | Core i9-11900K | Core i5-6400 |
|---|---|---|
| 3DMark 11 Performance Physics | 20,662 (+228.86%) | 6,283 |
| 3DMark Time Spy CPU | 12,902.5 | -- |
| Cinebench R15 Multi-Core | 2,379 (+366.47%) | 510 |
| Cinebench R15 Single-Core | 255 (+90.3%) | 134 |
| Geekbench 6.2 Multi-Core | 11,032 (+260.52%) | 3,060 |
| Geekbench 6.2 Single-Core | 2,403 (+113.79%) | 1,124 |
| CPU Mark Multi-Thread | 25,295 (+389.36%) | 5,169 |
| CPU Mark Single-Thread | 3,519 (+79.72%) | 1,958 |
Benchmarks Source: Notebookcheck
Technical Specs
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Manufacturing Details
Information about the CPU's manufacturing like its foundry, process size, and transistor count.
| Spec | Core i9-11900K | Core i5-6400 |
|---|---|---|
| Manufacturer | Intel | Intel |
| Foundry | Intel | Intel |
| Process Size | 14 nm | 14 nm |
Architecture
CPU architecture specs like its memory channels, memory support, and microarchitecture. Newer CPU architectures can minimize bottlenecks and improve execution efficiency using more advanced techniques.
| Spec | Core i9-11900K | Core i5-6400 |
|---|---|---|
| Series | Core i9 | Core i5 |
| Microarchitecture | Rocket Lake-S | Skylake |
| Codename | Rocket Lake | Skylake |
| Memory Support | DDR4 | DDR4 |
| Memory Channels | Dual-channel | Dual-channel |
| ECC Memory | No | No |
Cores & Clock Speeds
Processing power information like its cores and clock speed. These specs impact how fast they can handle instructions and tasks. These have a strong impact on the CPU's performance.
| Spec | Core i9-11900K | Core i5-6400 |
|---|---|---|
| Cores | 8 | 4 |
| Threads | 16 | 4 |
| Clock Speed | 3.5 GHz | 2.7 GHz |
| Turbo Clock | 5.3 GHz | 3.3 GHz |
| Base Clock | 100 MHz | 100 MHz |
| Multiplier | 35.0x | 27.0x |
| Multiplier Unlocked | Yes | No |
Cache
CPU cache specs like its L1 & L2 cache. These provide the CPU with a small, but super-fast memory access. A larger cache can improve a CPU's performance.
| Spec | Core i9-11900K | Core i5-6400 |
|---|---|---|
| L1 Cache | 80 KB | 64 KB |
| L2 Cache | 512 KB | 256 KB |
| L3 Cache | 16 MB | 6 MB |
Compatibility & Power Consumption
Compatibility and power consumption information like its socket type, thermal design power, power limits. These can help verify the CPU's compatibility with other PC components.
| Spec | Core i9-11900K | Core i5-6400 |
|---|---|---|
| Socket | Intel Socket 1200 | Intel Socket 1151 |
| PCI Express | PCIe 4.0 x20 | PCIe 3.0 x16 |
| Thermal Design Power (TDP) | 125 W | 65 W |
| Tcase Max | 72 °C | 71 °C |
| TJ Max | 100 °C | -- |
Graphics, Features, & Extensions
Additional CPU features like its bundled coolers, integrated graphics, and extensions/technologies.
| Spec | Core i9-11900K | Core i5-6400 |
|---|---|---|
| Integrated Graphics | UHD Graphics 750 | HD Graphics 530 |
| Extensions / Technologies | MMX, SSE, SSE2, SSE3, SSSE3, SSE4.2, AVX, AVX2, AVX-512F, FMA3, SHA, EIST, Intel 64, XD bit, VT-x, VT-d, AES-NI, TSX, TXT, CLMUL, F16C, BMI1, BMI2, ABM, ADX, RdRand, TBT 2.0, TBT 3.0, TVB | MMX, SSE, SSE2, SSE3, SSSE3, SSE4.2, AVX, AVX2, EIST, Intel 64, XD bit, VT-x, VT-d, AES-NI, TSX, TXT, CLMUL, FMA3, F16C, BMI1, BMI2, vPro, Boost 2.0 |
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* Performance rating, performance per dollar, and rankings are based on the 3DMark 11 Performance Physics benchmark and MSRP.