CPU
GPU
Core i7-5820K
Ryzen 9 5900X
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 9 5900X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i7-5820K | Ryzen 9 5900X |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($103) | ⚠️ Higher cost ($350) |
| Longevity | 🛑 Legacy (Haswell-E (2014) / 22 nm) | ✨ Modern (Vermeer (Zen3) (2020−2022) / 7 nm, 12 nm) |
💎 Value Proposition
| Insight | Core i7-5820K | Ryzen 9 5900X |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+17%) |
| Upfront Cost | ✅ More affordable ($103) | ⚠️ Higher cost ($350) |
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 9 5900X
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 9 5900X
The Ryzen 9 5900X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen3) (2020−2022) architecture. It features 12 cores and 24 threads. Base frequency is 3.7 GHz, with boost up to 4.8 GHz. L3 cache: 64 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4-3200. Passmark benchmark score: 38,955 points. Launch price was $549.
Processing Power
The Core i7-5820K packs 6 cores / 12 threads, while the Ryzen 9 5900X offers 12 cores / 24 threads — the Ryzen 9 5900X has 6 more cores. Boost clocks reach 3.6 GHz on the Core i7-5820K versus 4.8 GHz on the Ryzen 9 5900X — a 28.6% clock advantage for the Ryzen 9 5900X (base: 3.3 GHz vs 3.7 GHz). The Core i7-5820K uses the Haswell-E (2014) architecture (22 nm), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the Core i7-5820K scores 9,826 against the Ryzen 9 5900X's 38,955 — a 119.4% lead for the Ryzen 9 5900X. Cinebench R23 multi-core: 5,700 vs 21,000 (114.6% advantage for the Ryzen 9 5900X). Geekbench 6 single-core — the metric most relevant to gaming — records 1,134 vs 2,174, a 62.9% lead for the Ryzen 9 5900X that directly translates to higher frame rates. Multi-core Geekbench: 5,383 vs 11,888 (75.3% advantage for the Ryzen 9 5900X). L3 cache: 15 MB (total) on the Core i7-5820K vs 64 MB on the Ryzen 9 5900X.
| Feature | Core i7-5820K | Ryzen 9 5900X |
|---|---|---|
| Cores / Threads | 6 / 12 | 12 / 24+100% |
| Boost Clock | 3.6 GHz | 4.8 GHz+33% |
| Base Clock | 3.3 GHz | 3.7 GHz+12% |
| L3 Cache | 15 MB (total) | 64 MB+327% |
| L2 Cache | 256 kB (per core) | 512K (per core)+100% |
| Process | 22 nm | 7 nm, 12 nm-68% |
| Architecture | Haswell-E (2014) | Vermeer (Zen3) (2020−2022) |
| PassMark | 9,826 | 38,955+296% |
| Cinebench R23 Multi | 5,700 | 21,000+268% |
| Geekbench 6 Single | 1,134 | 2,174+92% |
| Geekbench 6 Multi | 5,383 | 11,888+121% |
Memory & Platform
The Core i7-5820K uses the LGA2011 socket (PCIe 3.0), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Both support up to DDR4-2133 memory speed. The Ryzen 9 5900X 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 9 5900X). PCIe lanes: 28 (Core i7-5820K) vs 24 (Ryzen 9 5900X) — the Core i7-5820K offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel X99 (Core i7-5820K) and A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X).
| Feature | Core i7-5820K | Ryzen 9 5900X |
|---|---|---|
| Socket | LGA2011 | AM4 |
| PCIe Generation | PCIe 3.0 | PCIe 4.0+33% |
| Max RAM Speed | DDR4-2133 | DDR4-3200 |
| Max RAM Capacity | 64 GB | 128 GB+100% |
| RAM Channels | 4+100% | 2 |
| ECC Support | ❌ | ✅ |
| PCIe Lanes | 28+17% | 24 |
Advanced Features
Both processors feature an unlocked multiplier for overclocking. Virtualization support: Yes (Core i7-5820K) vs AMD-V (Ryzen 9 5900X). Primary use case: Core i7-5820K targets Enthusiast Workstation, Ryzen 9 5900X targets Workstation. Direct competitor: Core i7-5820K rivals Ryzen 5 1600; Ryzen 9 5900X rivals Core i9-12900K.
| Feature | Core i7-5820K | Ryzen 9 5900X |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | Yes | Yes |
| AVX-512 | No | No |
| Virtualization | Yes | AMD-V |
| Target Use | Enthusiast Workstation | Workstation |
Value Analysis
The Core i7-5820K launched at $389 MSRP, while the Ryzen 9 5900X debuted at $549. At current prices ($103 vs $350), the Core i7-5820K is $247 cheaper. In terms of value (PassMark points per dollar), the Core i7-5820K delivers 95.4 pts/$ vs 111.3 pts/$ for the Ryzen 9 5900X — making the Ryzen 9 5900X the 15.4% better value option.
| Feature | Core i7-5820K | Ryzen 9 5900X |
|---|---|---|
| MSRP | $389-29% | $549 |
| Avg Price (30d) | $103-71% | $350 |
| Performance per Dollar | 95.4 | 111.3+17% |
| Release Date | 2014 | 2020 |
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