Core i7-5557U vs FX-770K
Core i7-5557U
FX-770K
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 Core i7-5557U is positioned at rank #563 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 Core i7-5557U
Performance Per Dollar
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i7-5557U | FX-770K |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($59) |
| Longevity | 🛑 Legacy (Broadwell-U (2015) / 14 nm) | 🛑 Legacy (Kaveri (2014−2015) / 28 nm) |
💎 Value Proposition
| Insight | Core i7-5557U | FX-770K |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($59) |
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 Core i7-5557U and FX-770K
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.
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.
Processing Power
The Core i7-5557U packs 2 cores / 4 threads, while the FX-770K offers 4 cores / 4 threads — the FX-770K has 2 more cores. Boost clocks reach 3.4 GHz on the Core i7-5557U versus 3.9 GHz on the FX-770K — a 13.7% clock advantage for the FX-770K (base: 3.1 GHz vs 3.5 GHz). The Core i7-5557U uses the Broadwell-U (2015) architecture (14 nm), while the FX-770K uses Kaveri (2014−2015) (28 nm). In PassMark, the Core i7-5557U scores 3,153 against the FX-770K's 3,172 — a 0.6% lead for the FX-770K.
| Feature | Core i7-5557U | FX-770K |
|---|---|---|
| Cores / Threads | 2 / 4 | 4 / 4+100% |
| Boost Clock | 3.4 GHz | 3.9 GHz+15% |
| Base Clock | 3.1 GHz | 3.5 GHz+13% |
| L3 Cache | 4 MB (total) | — |
| L2 Cache | 256K (per core) | 4 MB+1500% |
| Process | 14 nm-50% | 28 nm |
| Architecture | Broadwell-U (2015) | Kaveri (2014−2015) |
| PassMark | 3,153 | 3,172 |
Memory & Platform
The Core i7-5557U uses the FCBGA1168 socket (PCIe 3.0), while the FX-770K uses FM2+ (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | Core i7-5557U | FX-770K |
|---|---|---|
| Socket | FCBGA1168 | FM2+ |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
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