CPU
GPU
FX-770K
Core i7-5557U
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.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar
Performance Per Dollar Core i7-5557U
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | FX-770K | Core i7-5557U |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($59) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Kaveri (2014−2015) / 28 nm) | 🛑 Legacy (Broadwell-U (2015) / 14 nm) |
💎 Value Proposition
| Insight | FX-770K | Core i7-5557U |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($59) | ✅ 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 FX-770K and Core i7-5557U
FX-770K
The FX-770K is manufactured by AMD. It was released in Dezembro 2014 (11 years ago). It is based on the Kaveri (2014−2015) architecture. It features 4 cores and 4 threads. Base frequency is 3.5 GHz, with boost up to 3.9 GHz. L2 cache: 4 MB. Built on 28 nm process technology. Socket: FM2+. Thermal design power (TDP): 65 Watt. Memory support: DDR3-2133. Passmark benchmark score: 3,172 points. Launch price was $69.
Core i7-5557U
The Core i7-5557U is manufactured by Intel. It was released in 1 March 2015 (10 years ago). It is based on the Broadwell-U (2015) architecture. It features 2 cores and 4 threads. Base frequency is 3.1 GHz, with boost up to 3.4 GHz. L3 cache: 4 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: FCBGA1168. Thermal design power (TDP): 28 Watt. Memory support: DDR3. Passmark benchmark score: 3,153 points. Launch price was $426.
Processing Power
The FX-770K packs 4 cores / 4 threads, while the Core i7-5557U offers 2 cores / 4 threads — the FX-770K has 2 more cores. Boost clocks reach 3.9 GHz on the FX-770K versus 3.4 GHz on the Core i7-5557U — a 13.7% clock advantage for the FX-770K (base: 3.5 GHz vs 3.1 GHz). The FX-770K uses the Kaveri (2014−2015) architecture (28 nm), while the Core i7-5557U uses Broadwell-U (2015) (14 nm). In PassMark, the FX-770K scores 3,172 against the Core i7-5557U's 3,153 — a 0.6% lead for the FX-770K.
| Feature | FX-770K | Core i7-5557U |
|---|---|---|
| Cores / Threads | 4 / 4+100% | 2 / 4 |
| Boost Clock | 3.9 GHz+15% | 3.4 GHz |
| Base Clock | 3.5 GHz+13% | 3.1 GHz |
| L3 Cache | — | 4 MB (total) |
| L2 Cache | 4 MB+1500% | 256K (per core) |
| Process | 28 nm | 14 nm-50% |
| Architecture | Kaveri (2014−2015) | Broadwell-U (2015) |
| PassMark | 3,172 | 3,153 |
Memory & Platform
The FX-770K uses the FM2+ socket (PCIe 3.0), while the Core i7-5557U uses FCBGA1168 (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | FX-770K | Core i7-5557U |
|---|---|---|
| Socket | FM2+ | FCBGA1168 |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
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The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
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