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Intel Core i9-12900K vs Intel Atom C3955
Last updated:
Benchmarks
Performance Overview
Average performance across multiple benchmarks
Single-core performance
Multi-core performance
Geekbench 5, 64bit Single-Core
Single-core performance
Intel Core i9-12900K
100 %
16C / 24T · 5.20 GHz
Intel Atom C3955
19 %
16C / 16T · 2.40 GHz
Geekbench 5, 64bit Multi-Core
Multi-core performance
Intel Core i9-12900K
100 %
16C / 24T · 5.00 GHz
Intel Atom C3955
28 %
16C / 16T · 2.40 GHz
More benchmarks
Cinebench 2026 (ST)
218 entries
218 entries
Cinebench 2026 (MC)
219 entries
219 entries
Cinebench 2024 (SC)
427 entries
427 entries
Cinebench 2024 (MC)
422 entries
422 entries
Cinebench R23 (SC)
690 entries
690 entries
Cinebench R23 (MC)
665 entries
665 entries
Geekbench 6 (SC)
1,989 entries
1,989 entries
Geekbench 6 (MC)
1,927 entries
1,927 entries
Cinebench R20 (SC)
666 entries
666 entries
Geekbench 5 (SC)
2,512 entries
2,512 entries
Cinebench R20 (MC)
615 entries
615 entries
Geekbench 5 (MC)
2,483 entries
2,483 entries
FP32 SP (iGPU)
2,219 entries
2,219 entries
3DMark Timespy (iGPU)
534 entries
534 entries
Blender 3.1 Benchmark
213 entries
213 entries
PassMark CPU-Mark
2,504 entries
2,504 entries
CPU-Z Benchmark 17 (SC)
250 entries
250 entries
CPU-Z Benchmark 17 (MC)
751 entries
751 entries
V-Ray CPU-Render
251 entries
251 entries
Cinebench R15 (SC)
1,113 entries
1,113 entries
Cinebench R15 (MC)
1,110 entries
1,110 entries
CPU performance per watt (efficiency)
140 entries
140 entries
Specifications
At a glance
|
Wischen
|
Intel Core i9-12900K | Intel Atom C3955 |
|---|---|---|
| Family | Intel Core i9 (81) | Intel Atom (108) |
| CPU group | Intel Core i 12000 (34) | Intel Atom C3000 (20) |
| Architecture | Alder Lake S | Denverton |
| Technology | 10 nm | 14 nm |
| Segment | Desktop | Desktop |
| Socket | LGA 1700 | BGA 1310 |
| Predecessor | Intel Core i9-11900K | |
| Successor | Intel Core i9-13900K |
CPU Cores and Base Frequency
|
Wischen
|
Intel Core i9-12900K | Intel Atom C3955 |
|---|---|---|
| CPU Cores / Threads | 16 / 24 | 16 / 16 |
| Hyperthreading / SMT | ✓ | ✗ |
| Core architecture | hybrid (big.LITTLE) | normal |
| Core Cluster 1: | 8x Golden Cove 3.20 - 5.20 GHz |
16x 2.10 - 2.40 GHz |
| Core Cluster 2: | 8x Gracemont 2.40 - 3.90 GHz |
|
| L2-Cache | 14.00 MB | 16.00 MB |
| L3-Cache | 30.00 MB | |
| Overclocking | ✓ | ✗ |
Integrated graphics (iGPU)
|
Wischen
|
Intel Core i9-12900K | Intel Atom C3955 |
|---|---|---|
| GPU name | Intel UHD Graphics 770 | no iGPU |
| GPU frequency | 0.30 - 1.55 GHz | |
| CUs / Shader | 32 / 256 | / |
| Raytracing | ✗ | ✗ |
| Max. displays | 3 | |
| Max. GPU Memory | 64 GB | |
| Technology | 10 nm | |
| Release date | Q4/2021 |
NPU AI performance
|
Wischen
|
Intel Core i9-12900K | Intel Atom C3955 |
|---|---|---|
| AI hardware | ||
| AI specifications | ||
| NPU + CPU + iGPU |
Memory & PCIe
|
Wischen
|
Intel Core i9-12900K | Intel Atom C3955 |
|---|---|---|
| Memory | DDR5-4800 (76.8 GB/s) DDR4-3200 (51.2 GB/s) | DDR4-2400 (38.4 GB/s) |
| Max. Memory | 128 GB | 256 GB |
| Memory channels | 2 | 2 |
| ECC | Yes | Yes |
| PCIe | 5.0 x 20 | 3.0 x 16 |
| PCIe Bandwidth | 78.8 GB/s | 15.8 GB/s |
Thermal Management
|
Wischen
|
Intel Core i9-12900K | Intel Atom C3955 |
|---|---|---|
| TDP | 125 W | 32 W |
| TDP (PL2) | 241 W | |
| TDP up | ||
| TDP down | ||
| T. junction max. | 100 °C | 100 °C |
Technical details
|
Wischen
|
Intel Core i9-12900K | Intel Atom C3955 |
|---|---|---|
| Chip design | Monolithic | Monolithic |
| AES-NI | ✓ | ✓ |
| Operating systems | Windows 10, Windows 11, Linux | Windows 10, Linux |
| Instruction set | x86-64 (64 bit) | x86-64 (64 bit) |
| ISA extensions | SSE4.1, SSE4.2, AVX2, AVX2+ | SSE4.1, SSE4.2 |
| Release date | Q4/2021 | Q3/2017 |
| Release price | 589 $ | 434 $ |
| Documents | Technical data sheet | Technical data sheet |
User Reviews
Your rating
Here you can rate one or both of the processors. The average rating of Intel Core i9-12900K is 4.2 stars (118 ratings), while Intel Atom C3955 has received 5.0 stars (1 ratings).
Click on the stars to rate one or both processors.
Most popular CPUs in both categories
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Intel Core i9-12900K
16C / 24T · 5.20 GHz
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