Performance
Ryzen 9 3900X
18,93251% of 36,991
Core i9-12900K39% better
26,22371% of 36,991
The Core i9-12900K has 39% better performance than the Ryzen 9 3900X for the 3DMark 11 Performance Physics benchmark.
Performance per dollar
Ryzen 9 3900X
37.9431% of 121.53
Core i9-12900K15% better
43.7836% of 121.53
The Core i9-12900K has 15% better value for the money than the Ryzen 9 3900X for the 3DMark 11 Performance Physics benchmark.
Shop Ryzen 9 3900X
Shop Core i9-12900K
As an Amazon Associate I earn from qualifying purchases.
Summary
#
About the AMD Ryzen 9 3900X CPU
The AMD Ryzen 9 3900X is a 12-core (24-thread) processor built for the desktop CPU market. It launched in Q3 2019 with a suggested retail price of $499. It is part of AMD's Ryzen 9 lineup, which is based on the Zen 2 microarchitecture. The 3900X is compatible with AMD Socket AM4 motherboards and is fabricated on TSMC's 7 nm manufacturing process.
Memory and Cache
The Ryzen 9 3900X supports DDR4 memory and features a dual-channel memory controller, allowing it to utilize 2 memory modules simultaneously. In terms of cache, the Ryzen 9 3900X 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 512 KB, is larger but slower than the L1. Its L3 cache, a shared resource among the CPU's cores, has a capacity of 64 MB.
Cores and Clock Speeds
The Ryzen 9 3900X features 12 total cores which can process 24 threads simultaneously. The multi-threading capability allows the CPU to execute multiple computational tasks in parallel. The base clock speed of the CPU is 3.8 GHz, and it can boost up to 4.6 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 Ryzen 9 3900X does not include an integrated graphics solution. A dedicated graphics card will be required if you require a monitor with your computer.
Benchmark Performance & Value
The Ryzen 9 3900X has the 80th best 3DMark 11 Performance Physics score among the 721 benchmarked CPUs in our database. It achieves 51.18% of the performance of the best benchmarked CPU, the AMD Ryzen 9 7950X3D. Its 18,932 score and $499 launch price (MSRP) gives it a performance per dollar of 37.94. This is the 86th best in value for the 3DMark 11 Perf. Physics benchmark.
About the Intel Core i9-12900K CPU
The Intel Core i9-12900K is a 16-core (24-thread) processor built for the desktop CPU market. It launched in Q4 2021 with a suggested retail price of $599. It is part of Intel's Core i9 lineup, which is based on the Alder Lake-S microarchitecture. The i9-12900K is compatible with Intel Socket 1700 motherboards and is fabricated on Intel's 10 nm manufacturing process. It features the UHD Graphics 770 integrated graphics solution.
Memory and Cache
The Core i9-12900K supports DDR4-3200, DDR5-4800 memory and features a dual-channel memory controller, allowing it to utilize 2 memory modules simultaneously. In terms of cache, the Core i9-12900K 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 1.25 MB, is larger but slower than the L1. Its L3 cache, a shared resource among the CPU's cores, has a capacity of 30 MB.
Cores and Clock Speeds
The Core i9-12900K features 16 total cores which can process 24 threads simultaneously. The multi-threading capability allows the CPU to execute multiple computational tasks in parallel. The 16 cores consist of 8 P-Cores and 8 E-Cores. P-Cores are designed for high-performance tasks and E-Cores are intended for efficiency and lighter tasks. The base clock speed of the CPU is 3.2 GHz, and it can boost up to 5.2 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 i9-12900K includes an integrated graphics solution called UHD Graphics 770. 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 i9-12900K has the 20th best 3DMark 11 Performance Physics score among the 721 benchmarked CPUs in our database. It achieves 70.89% of the performance of the best benchmarked CPU, the AMD Ryzen 9 7950X3D. Its 26,223 score and $599 launch price (MSRP) gives it a performance per dollar of 43.78. This is the 63rd 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 | Ryzen 9 3900X | Core i9-12900K |
|---|---|---|
| Manufacturer | AMD | Intel |
| Series | Ryzen 9 | Core i9 |
| Market Segment | Desktop | Desktop |
| Release Date | Q3 2019 | Q4 2021 |
| Launch Price (MSRP) | $499 | $599 |
| Production Status | Active | Active |
| Shop | Check Price | Check Price |
Benchmark Performance
#
Performance
Ryzen 9 3900X
18,93251% of 36,991
Core i9-12900K39% better
26,22371% of 36,991
The Core i9-12900K has 39% better performance than the Ryzen 9 3900X for the 3DMark 11 Performance Physics benchmark.
The Ryzen 9 3900X is ranked 80th with a score of 18,932, and the Core i9-12900K is ranked 20th with a score of 26,223.
Performance per dollar
Ryzen 9 3900X
37.9431% of 121.53
Core i9-12900K15% better
43.7836% of 121.53
The Core i9-12900K has 15% better value for the money than the Ryzen 9 3900X for the 3DMark 11 Performance Physics benchmark.
The Ryzen 9 3900X is ranked 86th with a performance per dollar of 37.94, and the Core i9-12900K is ranked 63rd with a performance per dollar of 43.78.
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:Ryzen 9 3900X or
| CPU | Benchmark Performance | |
|---|---|---|
| Core i7-13700 | 26,874 | +42% |
| Ryzen 9 7900 | 26,325 | +39% |
| Core i9-12900K | 26,223 | +39% |
| Ryzen 5 7600X | 25,731 | +36% |
| Ryzen 5 9600X | 25,717 | +36% |
| Core i5-12400F | 19,436 | +3% |
| Core i9-9980XE | 19,237 | +2% |
| Ryzen 9 3900X | 18,932 | |
| Ryzen 7 3800XT | 18,905 | -0% |
| Core i9-9900KS | 18,694 | -1% |
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:Ryzen 9 3900X or
| CPU | Performance Per Dollar | |
|---|---|---|
| Ryzen 9 7950X | 50.42 | +33% |
| Core i9-12900 | 46.85 | +23% |
| Core i9-12900K | 43.78 | +15% |
| Core i7-8700K | 41.13 | +8% |
| Core i9-10900K | 40.1 | +6% |
| Core i9-11900K | 38.33 | +1% |
| Ryzen 9 5900X | 38.33 | +1% |
| Core i7-9700K | 38.07 | +0% |
| Ryzen 9 3900X | 37.94 | |
| Core i9-9900KS | 36.44 | -4% |
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 | Ryzen 9 3900X | Core i9-12900K |
|---|---|---|
| 3DMark 11 Performance Physics | 18,932 | 26,223 (+38.51%) |
| 3DMark Time Spy CPU | 11,923 | 18,555.5 (+55.63%) |
| Cinebench R15 Multi-Core | 3,049 | 4,057 (+33.06%) |
| Cinebench R15 Single-Core | 207 | 289 (+39.61%) |
| Geekbench 6.2 Multi-Core | 9,950 | 15,574 (+56.52%) |
| Geekbench 6.2 Single-Core | 1,710 | 2,655 (+55.26%) |
| CPU Mark Multi-Thread | 32,647 | 41,415 (+26.86%) |
| CPU Mark Single-Thread | 2,706 | 4,166 (+53.95%) |
Benchmarks Source: Notebookcheck
Technical Specs
#
Manufacturing Details
Information about the CPU's manufacturing like its foundry, process size, and transistor count.
| Spec | Ryzen 9 3900X | Core i9-12900K |
|---|---|---|
| Manufacturer | AMD | Intel |
| Foundry | TSMC | Intel |
| Process Size | 7 nm | 10 nm |
| Transistors | 7,600 million | -- |
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 | Ryzen 9 3900X | Core i9-12900K |
|---|---|---|
| Series | Ryzen 9 | Core i9 |
| Microarchitecture | Zen 2 | Alder Lake-S |
| Codename | Matisse | Alder Lake-S |
| Memory Support | DDR4 | DDR4-3200, DDR5-4800 |
| 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 | Ryzen 9 3900X | Core i9-12900K |
|---|---|---|
| Cores | 12 | 16 |
| Threads | 24 | 24 |
| Performance Cores (P-cores) | -- | 8 |
| Efficient Cores (E-cores) | -- | 8 |
| Clock Speed | 3.8 GHz | 3.2 GHz |
| Turbo Clock | 4.6 GHz | 5.2 GHz |
| P-core Clock | -- | 3.2 GHz |
| P-core Turbo Clock | -- | 5.2 GHz |
| E-core Clock Speed | -- | 2.4 GHz |
| E-core Turbo Clock | -- | 3.9 GHz |
| Base Clock | 100 MHz | 100 MHz |
| Multiplier | 38.0x | 32.0x |
| Multiplier Unlocked | Yes | Yes |
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 | Ryzen 9 3900X | Core i9-12900K |
|---|---|---|
| L1 Cache | 64 KB | 80 KB |
| L2 Cache | 512 KB | 1.25 MB |
| L3 Cache | 64 MB | 30 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 | Ryzen 9 3900X | Core i9-12900K |
|---|---|---|
| Socket | AMD Socket AM4 | Intel Socket 1700 |
| PCI Express | PCIe 4.0 x24 | PCIe 5.0 x20 |
| Thermal Design Power (TDP) | 105 W | 125 W |
| Power Limit 1 (PL1) | -- | 241 W |
| Power Limit 2 (PL2) | -- | 241 W |
| Package Power Tracking (PPT) | 142 W | -- |
| Tcase Max | 95 °C | 72 °C |
| TJ Max | -- | 100 °C |
Graphics, Features, & Extensions
Additional CPU features like its bundled coolers, integrated graphics, and extensions/technologies.
| Spec | Ryzen 9 3900X | Core i9-12900K |
|---|---|---|
| Integrated Graphics | -- | UHD Graphics 770 |
| Extensions / Technologies | MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AES, AVX, AVX2, BMI1, BMI2, SHA, F16C, FMA3, AMD64, EVP, AMD-V, SMAP, SMEP, SMT, Precision Boost 2, XFR 2 | MMX, SSE, SSE2, SSE3, SSSE3, SSE4.2, AVX, AVX2, 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 |
Check out these comparisons for similar CPUs:
Looking for alternatives? Check out these similar CPUs:
* Performance rating, performance per dollar, and rankings are based on the 3DMark 11 Performance Physics benchmark and MSRP.