Core i7-3820 vs Ryzen 7 7800X3D
Core i7-3820
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 i7-3820 is positioned at rank #791 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 i7-3820
Performance Per Dollar Ryzen 7 7800X3D
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i7-3820 | Ryzen 7 7800X3D |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($30) | ⚠️ Higher cost ($384) |
| Longevity | 🛑 Legacy (Sandy Bridge-E (2011−2013) / 32 nm) | ✨ Modern (Raphael (Zen4) (2022−2023) / 5 nm) |
💎 Value Proposition
| Insight | Core i7-3820 | Ryzen 7 7800X3D |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+116%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($30) | ⚠️ 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 i7-3820 and Ryzen 7 7800X3D
Core i7-3820
The Core i7-3820 is manufactured by Intel. It was released in Fevereiro 2012 (13 years ago). It is based on the Sandy Bridge-E (2011−2013) architecture. It features 4 cores and 8 threads. Base frequency is 3.6 GHz, with boost up to 3.8 GHz. L3 cache: 10240 kB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA2011. Thermal design power (TDP): 130 Watt. Memory support: DDR3. Passmark benchmark score: 5,787 points. Launch price was $400.
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 i7-3820 packs 4 cores / 8 threads, while the Ryzen 7 7800X3D offers 8 cores / 16 threads — the Ryzen 7 7800X3D has 4 more cores. Boost clocks reach 3.8 GHz on the Core i7-3820 versus 5 GHz on the Ryzen 7 7800X3D — a 27.3% clock advantage for the Ryzen 7 7800X3D (base: 3.6 GHz vs 4.4 GHz). The Core i7-3820 uses the Sandy Bridge-E (2011−2013) architecture (32 nm), while the Ryzen 7 7800X3D uses Raphael (Zen4) (2022−2023) (5 nm). In PassMark, the Core i7-3820 scores 5,787 against the Ryzen 7 7800X3D's 34,293 — a 142.2% lead for the Ryzen 7 7800X3D. Geekbench 6 single-core — the metric most relevant to gaming — records 624 vs 2,700, a 124.9% lead for the Ryzen 7 7800X3D that directly translates to higher frame rates. L3 cache: 10240 kB (total) on the Core i7-3820 vs 96 MB (total) on the Ryzen 7 7800X3D.
| Feature | Core i7-3820 | Ryzen 7 7800X3D |
|---|---|---|
| Cores / Threads | 4 / 8 | 8 / 16+100% |
| Boost Clock | 3.8 GHz | 5 GHz+32% |
| Base Clock | 3.6 GHz | 4.4 GHz+22% |
| L3 Cache | 10240 kB (total) | 96 MB (total)+860% |
| L2 Cache | 256 kB (per core) | 1 MB (per core)+300% |
| Process | 32 nm | 5 nm-84% |
| Architecture | Sandy Bridge-E (2011−2013) | Raphael (Zen4) (2022−2023) |
| PassMark | 5,787 | 34,293+493% |
| Cinebench R23 Multi | — | 18,500 |
| Geekbench 6 Single | 624 | 2,700+333% |
| Geekbench 6 Multi | — | 15,000 |
Memory & Platform
The Core i7-3820 uses the LGA2011 socket (PCIe 2.0), while the Ryzen 7 7800X3D uses AM5 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1600 on the Core i7-3820 versus DDR5-5200 on the Ryzen 7 7800X3D — the Ryzen 7 7800X3D supports 50% 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 i7-3820) vs 2 (Ryzen 7 7800X3D). PCIe lanes: 40 (Core i7-3820) vs 28 (Ryzen 7 7800X3D) — the Core i7-3820 offers 12 more lanes for additional GPUs or NVMe drives. Chipset compatibility: X79 (Core i7-3820) and X670E,X670,B650E,B650,A620 (Ryzen 7 7800X3D).
| Feature | Core i7-3820 | Ryzen 7 7800X3D |
|---|---|---|
| Socket | LGA2011 | AM5 |
| PCIe Generation | PCIe 2.0 | PCIe 5.0+150% |
| Max RAM Speed | DDR3-1600 | DDR5-5200+67% |
| Max RAM Capacity | 64 GB | 128 GB+100% |
| RAM Channels | 4+100% | 2 |
| ECC Support | ❌ | ✅ |
| PCIe Lanes | 40+43% | 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: VT-x, VT-d, EPT (Core i7-3820) vs AMD-V (Ryzen 7 7800X3D). The Ryzen 7 7800X3D includes integrated graphics (AMD Radeon Graphics (2-core)), while the Core i7-3820 requires a dedicated GPU. Primary use case: Core i7-3820 targets HEDT Desktop, Ryzen 7 7800X3D targets Gaming. Direct competitor: Core i7-3820 rivals FX-8350; Ryzen 7 7800X3D rivals Intel Core i7-14700K.
| Feature | Core i7-3820 | Ryzen 7 7800X3D |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | None | AMD Radeon Graphics (2-core) |
| Unlocked | Yes | Yes |
| AVX-512 | No | Yes |
| Virtualization | VT-x, VT-d, EPT | AMD-V |
| Target Use | HEDT Desktop | Gaming |
Value Analysis
The Core i7-3820 launched at $286 MSRP, while the Ryzen 7 7800X3D debuted at $449. At current prices ($30 vs $384), the Core i7-3820 is $354 cheaper. In terms of value (PassMark points per dollar), the Core i7-3820 delivers 192.9 pts/$ vs 89.3 pts/$ for the Ryzen 7 7800X3D — making the Core i7-3820 the 73.4% better value option.
| Feature | Core i7-3820 | Ryzen 7 7800X3D |
|---|---|---|
| MSRP | $286-36% | $449 |
| Avg Price (30d) | $30-92% | $384 |
| Performance per Dollar | 192.9+116% | 89.3 |
| Release Date | 2012 | 2023 |
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