CPU
GPU
Core i7-5820K
Popular choices:
Ryzen 7 7800X3D
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 i7-5820K is positioned at rank #686 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 i7-5820K
Performance Per Dollar Ryzen 7 7800X3D
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i7-5820K | Ryzen 7 7800X3D |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($103) | ⚠️ Higher cost ($384) |
| Longevity | 🛑 Legacy (Haswell-E (2014) / 22 nm) | ✨ Modern (Raphael (Zen4) (2022−2023) / 5 nm) |
💎 Value Proposition
| Insight | Core i7-5820K | Ryzen 7 7800X3D |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+7%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($103) | ⚠️ Higher cost ($384) |
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 i7-5820K and Ryzen 7 7800X3D
Core i7-5820K
The Core i7-5820K is manufactured by Intel. It was released in 1 September 2014 (11 years ago). It is based on the Haswell-E (2014) architecture. It features 6 cores and 12 threads. Base frequency is 3.3 GHz, with boost up to 3.6 GHz. L3 cache: 15 MB (total). L2 cache: 256 kB (per core). Built on 22 nm process technology. Socket: LGA2011. Thermal design power (TDP): 140 Watt. Memory support: DDR4. Passmark benchmark score: 9,826 points. Launch price was $410.
Ryzen 7 7800X3D
The Ryzen 7 7800X3D is manufactured by AMD. It was released in 4 January 2023 (2 years ago). It is based on the Raphael (Zen4) (2022−2023) architecture. It features 8 cores and 16 threads. Base frequency is 4.4 GHz, with boost up to 5 GHz. L3 cache: 96 MB (total). L2 cache: 1 MB (per core). Built on 5 nm process technology. Socket: AM5. Thermal design power (TDP): 120 Watt. Memory support: DDR5-5200. Passmark benchmark score: 34,293 points. Launch price was $449.
Processing Power
The Core i7-5820K packs 6 cores / 12 threads, while the Ryzen 7 7800X3D offers 8 cores / 16 threads — the Ryzen 7 7800X3D has 2 more cores. Boost clocks reach 3.6 GHz on the Core i7-5820K versus 5 GHz on the Ryzen 7 7800X3D — a 32.6% clock advantage for the Ryzen 7 7800X3D (base: 3.3 GHz vs 4.4 GHz). The Core i7-5820K uses the Haswell-E (2014) architecture (22 nm), while the Ryzen 7 7800X3D uses Raphael (Zen4) (2022−2023) (5 nm). In PassMark, the Core i7-5820K scores 9,826 against the Ryzen 7 7800X3D's 34,293 — a 110.9% lead for the Ryzen 7 7800X3D. Cinebench R23 multi-core: 5,700 vs 18,500 (105.8% advantage for the Ryzen 7 7800X3D). Geekbench 6 single-core — the metric most relevant to gaming — records 1,134 vs 2,700, a 81.7% lead for the Ryzen 7 7800X3D that directly translates to higher frame rates. Multi-core Geekbench: 5,383 vs 15,000 (94.4% advantage for the Ryzen 7 7800X3D). L3 cache: 15 MB (total) on the Core i7-5820K vs 96 MB (total) on the Ryzen 7 7800X3D.
| Feature | Core i7-5820K | Ryzen 7 7800X3D |
|---|---|---|
| Cores / Threads | 6 / 12 | 8 / 16+33% |
| Boost Clock | 3.6 GHz | 5 GHz+39% |
| Base Clock | 3.3 GHz | 4.4 GHz+33% |
| L3 Cache | 15 MB (total) | 96 MB (total)+540% |
| L2 Cache | 256 kB (per core) | 1 MB (per core)+300% |
| Process | 22 nm | 5 nm-77% |
| Architecture | Haswell-E (2014) | Raphael (Zen4) (2022−2023) |
| PassMark | 9,826 | 34,293+249% |
| Cinebench R23 Multi | 5,700 | 18,500+225% |
| Geekbench 6 Single | 1,134 | 2,700+138% |
| Geekbench 6 Multi | 5,383 | 15,000+179% |
Memory & Platform
The Core i7-5820K uses the LGA2011 socket (PCIe 3.0), while the Ryzen 7 7800X3D uses AM5 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2133 on the Core i7-5820K versus DDR5-5200 on the Ryzen 7 7800X3D — the Ryzen 7 7800X3D supports 22.2% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 7 7800X3D supports up to 128 GB of RAM compared to 64 GB — 66.7% more capacity for professional workloads. Memory channels: 4 (Core i7-5820K) vs 2 (Ryzen 7 7800X3D). Both provide 28 PCIe lanes. Chipset compatibility: Intel X99 (Core i7-5820K) and X670E,X670,B650E,B650,A620 (Ryzen 7 7800X3D).
| Feature | Core i7-5820K | Ryzen 7 7800X3D |
|---|---|---|
| Socket | LGA2011 | AM5 |
| PCIe Generation | PCIe 3.0 | PCIe 5.0+67% |
| Max RAM Speed | DDR4-2133 | DDR5-5200+25% |
| Max RAM Capacity | 64 GB | 128 GB+100% |
| RAM Channels | 4+100% | 2 |
| ECC Support | ❌ | ✅ |
| PCIe Lanes | 28 | 28 |
Advanced Features
Both processors feature an unlocked multiplier for overclocking. Only the Ryzen 7 7800X3D supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: Yes (Core i7-5820K) vs AMD-V (Ryzen 7 7800X3D). The Ryzen 7 7800X3D includes integrated graphics (AMD Radeon Graphics (2-core)), while the Core i7-5820K requires a dedicated GPU. Primary use case: Core i7-5820K targets Enthusiast Workstation, Ryzen 7 7800X3D targets Gaming. Direct competitor: Core i7-5820K rivals Ryzen 5 1600; Ryzen 7 7800X3D rivals Intel Core i7-14700K.
| Feature | Core i7-5820K | Ryzen 7 7800X3D |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | — | AMD Radeon Graphics (2-core) |
| Unlocked | Yes | Yes |
| AVX-512 | No | Yes |
| Virtualization | Yes | AMD-V |
| Target Use | Enthusiast Workstation | Gaming |
Value Analysis
The Core i7-5820K launched at $389 MSRP, while the Ryzen 7 7800X3D debuted at $449. At current prices ($103 vs $384), the Core i7-5820K is $281 cheaper. In terms of value (PassMark points per dollar), the Core i7-5820K delivers 95.4 pts/$ vs 89.3 pts/$ for the Ryzen 7 7800X3D — making the Core i7-5820K the 6.6% better value option.
| Feature | Core i7-5820K | Ryzen 7 7800X3D |
|---|---|---|
| MSRP | $389-13% | $449 |
| Avg Price (30d) | $103-73% | $384 |
| Performance per Dollar | 95.4+7% | 89.3 |
| Release Date | 2014 | 2023 |
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