Athlon II X4 638 vs Core i5-3427U
Athlon II X4 638
Core i5-3427U
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. Components placed above yours deliver better value for money. The Athlon II X4 638 is positioned at rank 1040 and the Core i5-3427U is on rank 979, so the Core i5-3427U offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Athlon II X4 638
Performance Per Dollar Core i5-3427U
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon II X4 638 | Core i5-3427U |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($280) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Llano (2011−2012) / 32 nm) | 🛑 Legacy (Ivy Bridge (2012−2013) / 22 nm) |
💎 Value Proposition
| Insight | Athlon II X4 638 | Core i5-3427U |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($280) | ✅ More affordable ($0) |
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 638 and Core i5-3427U
Athlon II X4 638
The Athlon II X4 638 is manufactured by AMD. It was released in 2009-01-01. It is based on the Llano (2011−2012) architecture. It features 4 cores and 4 threads. Base frequency is 2.7 GHz, with boost up to 2.7 GHz. L3 cache: 0 kB. L2 cache: 1 MB (per core). Built on 32 nm process technology. Socket: FM1. Thermal design power (TDP): 65 Watt. Memory support: DDR3. Passmark benchmark score: 2,260 points. Launch price was $149.
Core i5-3427U
The Core i5-3427U is manufactured by Intel. It was released in 1 June 2012 (13 years ago). It is based on the Ivy Bridge (2012−2013) architecture. It features 2 cores and 4 threads. Base frequency is 1.8 GHz, with boost up to 2.8 GHz. L3 cache: 3 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: BGA1023. Thermal design power (TDP): 17 Watt. Memory support: DDR3/L/-RS 1333/1600. Passmark benchmark score: 2,252 points. Launch price was $225.
Processing Power
The Athlon II X4 638 packs 4 cores / 4 threads, while the Core i5-3427U offers 2 cores / 4 threads — the Athlon II X4 638 has 2 more cores. Boost clocks reach 2.7 GHz on the Athlon II X4 638 versus 2.8 GHz on the Core i5-3427U — a 3.6% clock advantage for the Core i5-3427U (base: 2.7 GHz vs 1.8 GHz). The Athlon II X4 638 uses the Llano (2011−2012) architecture (32 nm), while the Core i5-3427U uses Ivy Bridge (2012−2013) (22 nm). In PassMark, the Athlon II X4 638 scores 2,260 against the Core i5-3427U's 2,252 — a 0.4% lead for the Athlon II X4 638. L3 cache: 0 kB on the Athlon II X4 638 vs 3 MB (total) on the Core i5-3427U.
| Feature | Athlon II X4 638 | Core i5-3427U |
|---|---|---|
| Cores / Threads | 4 / 4+100% | 2 / 4 |
| Boost Clock | 2.7 GHz | 2.8 GHz+4% |
| Base Clock | 2.7 GHz+50% | 1.8 GHz |
| L3 Cache | 0 kB | 3 MB (total) |
| L2 Cache | 1 MB (per core)+300% | 256K (per core) |
| Process | 32 nm | 22 nm-31% |
| Architecture | Llano (2011−2012) | Ivy Bridge (2012−2013) |
| PassMark | 2,260 | 2,252 |
Memory & Platform
The Athlon II X4 638 uses the FM1 socket (PCIe 2.0), while the Core i5-3427U uses BGA1023 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1866 on the Athlon II X4 638 versus 1600 on the Core i5-3427U — the Core i5-3427U supports 199.3% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Athlon II X4 638 supports up to 64 GB of RAM compared to 32 — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes. Chipset compatibility: AMD FM1 (Athlon II X4 638) and HM76,UM77,QM77,QS77 (Core i5-3427U).
| Feature | Athlon II X4 638 | Core i5-3427U |
|---|---|---|
| Socket | FM1 | BGA1023 |
| PCIe Generation | PCIe 2.0 | PCIe 3.0+50% |
| Max RAM Speed | DDR3-1866 | 1600+53233% |
| Max RAM Capacity | 64 GB+209715100% | 32 |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 16 | 16 |
Advanced Features
Virtualization: not specified (Athlon II X4 638) / true (Core i5-3427U). The Core i5-3427U includes integrated graphics (Intel HD Graphics 4000), while the Athlon II X4 638 requires a dedicated GPU. Direct competitor: Core i5-3427U rivals AMD A8-4555M.
| Feature | Athlon II X4 638 | Core i5-3427U |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | — | Intel HD Graphics 4000 |
| Unlocked | — | No |
| AVX-512 | — | No |
| Virtualization | — | true |
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