Athlon II X4 645 vs Core i5-12400F
Athlon II X4 645
Core i5-12400F
Performance Spectrum - CPU
About PassMark
PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. The Athlon II X4 645 is positioned at rank #819 in our cost-efficiency ranking, representing a Lower cost-benefit for your build. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Athlon II X4 645
Performance Per Dollar Core i5-12400F
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon II X4 645 | Core i5-12400F |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($20) | ⚠️ Higher cost ($110) |
| Longevity | 🛑 Legacy (Propus (2009−2011) / 45 nm) | ✨ Modern (Alder Lake-S (2022) / Intel 7 nm) |
💎 Value Proposition
| Insight | Athlon II X4 645 | Core i5-12400F |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+50%) |
| Upfront Cost | ✅ More affordable ($20) | ⚠️ Higher cost ($110) |
Performance Check
To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.
Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.
Technical Specifications
Side-by-side comparison of Athlon II X4 645 and Core i5-12400F
Athlon II X4 645
The Athlon II X4 645 is manufactured by AMD. It was released in 21 September 2010 (15 years ago). It is based on the Propus (2009−2011) architecture. It features 4 cores and 4 threads. Base frequency is 3.1 GHz, with boost up to 3.1 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 2,375 points. Launch price was $80.
Core i5-12400F
The Core i5-12400F is manufactured by Intel. It was released in 4 January 2022 (3 years ago). It is based on the Alder Lake-S (2022) architecture. It features 6 cores and 12 threads. Base frequency is 2.5 GHz, with boost up to 4.4 GHz. L3 cache: 18 MB (total). L2 cache: 1.25 MB (per core). Built on Intel 7 nm process technology. Socket: LGA1700. Thermal design power (TDP): 65 Watt. Memory support: DDR5-4800, DDR4-3200. Passmark benchmark score: 19,532 points. Launch price was $180.
Processing Power
The Athlon II X4 645 packs 4 cores / 4 threads, while the Core i5-12400F offers 6 cores / 12 threads — the Core i5-12400F has 2 more cores. Boost clocks reach 3.1 GHz on the Athlon II X4 645 versus 4.4 GHz on the Core i5-12400F — a 34.7% clock advantage for the Core i5-12400F (base: 3.1 GHz vs 2.5 GHz). The Athlon II X4 645 uses the Propus (2009−2011) architecture (45 nm), while the Core i5-12400F uses Alder Lake-S (2022) (Intel 7 nm). In PassMark, the Athlon II X4 645 scores 2,375 against the Core i5-12400F's 19,532 — a 156.6% lead for the Core i5-12400F. Cinebench R23 multi-core: 1,374 vs 12,380 (160% advantage for the Core i5-12400F). Geekbench 6 single-core — the metric most relevant to gaming — records 399 vs 1,700, a 124% lead for the Core i5-12400F that directly translates to higher frame rates. Multi-core Geekbench: 1,374 vs 657 (70.6% advantage for the Athlon II X4 645). L3 cache: 0 kB on the Athlon II X4 645 vs 18 MB (total) on the Core i5-12400F.
| Feature | Athlon II X4 645 | Core i5-12400F |
|---|---|---|
| Cores / Threads | 4 / 4 | 6 / 12+50% |
| Boost Clock | 3.1 GHz | 4.4 GHz+42% |
| Base Clock | 3.1 GHz+24% | 2.5 GHz |
| L3 Cache | 0 kB | 18 MB (total) |
| L2 Cache | 512 kB (per core) | 1.25 MB (per core)+150% |
| Process | 45 nm | Intel 7 nm-84% |
| Architecture | Propus (2009−2011) | Alder Lake-S (2022) |
| PassMark | 2,375 | 19,532+722% |
| Cinebench R23 Multi | 1,374 | 12,380+801% |
| Geekbench 6 Single | 399 | 1,700+326% |
| Geekbench 6 Multi | 1,374+109% | 657 |
Memory & Platform
The Athlon II X4 645 uses the AM3 socket (PCIe 2.0), while the Core i5-12400F uses LGA1700 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1333 on the Athlon II X4 645 versus DDR5-4800, DDR4-3200 on the Core i5-12400F — the Core i5-12400F supports 50% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i5-12400F supports up to 128 GB of RAM compared to 16 GB — 155.6% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Athlon II X4 645) vs 20 (Core i5-12400F) — the Core i5-12400F offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AMD 700 Series,AMD 800 Series,AMD 900 Series (Athlon II X4 645) and H610,B660,H670,Z690,B760,H770,Z790 (Core i5-12400F).
| Feature | Athlon II X4 645 | Core i5-12400F |
|---|---|---|
| Socket | AM3 | LGA1700 |
| PCIe Generation | PCIe 2.0 | PCIe 3.0+50% |
| Max RAM Speed | DDR3-1333 | DDR5-4800, DDR4-3200+67% |
| Max RAM Capacity | 16 GB | 128 GB+700% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 16 | 20+25% |
Advanced Features
Virtualization support: Yes (Athlon II X4 645) vs VT-x, VT-d, EPT (Core i5-12400F). Primary use case: Athlon II X4 645 targets Desktop, Core i5-12400F targets Gaming Performance/Value. Direct competitor: Core i5-12400F rivals Ryzen 5 5600.
| Feature | Athlon II X4 645 | Core i5-12400F |
|---|---|---|
| Integrated GPU | No | No |
| AVX-512 | No | — |
| Virtualization | Yes | VT-x, VT-d, EPT |
| Target Use | Desktop | Gaming Performance/Value |
Value Analysis
The Athlon II X4 645 launched at $126 MSRP, while the Core i5-12400F debuted at $174. At current prices ($20 vs $110), the Athlon II X4 645 is $90 cheaper. In terms of value (PassMark points per dollar), the Athlon II X4 645 delivers 118.8 pts/$ vs 177.6 pts/$ for the Core i5-12400F — making the Core i5-12400F the 39.7% better value option.
| Feature | Athlon II X4 645 | Core i5-12400F |
|---|---|---|
| MSRP | $126-28% | $174 |
| Avg Price (30d) | $20-82% | $110 |
| Performance per Dollar | 118.8 | 177.6+49% |
| Release Date | 2010 | 2022 |
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