Ryzen 7 7800X3D vs Phenom II X3 720
Ryzen 7 7800X3D
Phenom II X3 720
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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 Ryzen 7 7800X3D
Performance Per Dollar Phenom II X3 720
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Ryzen 7 7800X3D | Phenom II X3 720 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($384) | ✅ More affordable ($64) |
| Longevity | ✨ Modern (Raphael (Zen4) (2022−2023) / 5 nm) | 🛑 Legacy (Heka (2009−2010) / 45 nm) |
💎 Value Proposition
| Insight | Ryzen 7 7800X3D | Phenom II X3 720 |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+257%) | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($384) | ✅ More affordable ($64) |
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 Ryzen 7 7800X3D and Phenom II X3 720
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.
Phenom II X3 720
The Phenom II X3 720 is manufactured by AMD. It was released in 1 January 2010 (15 years ago). It is based on the Heka (2009−2010) architecture. It features 3 cores and 3 threads. Base frequency is 2.8 GHz, with boost up to 2.8 GHz. L3 cache: 6 MB (total). L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 1,600 points. Launch price was $75.
Processing Power
The Ryzen 7 7800X3D packs 8 cores / 16 threads, while the Phenom II X3 720 offers 3 cores / 3 threads — the Ryzen 7 7800X3D has 5 more cores. Boost clocks reach 5 GHz on the Ryzen 7 7800X3D versus 2.8 GHz on the Phenom II X3 720 — a 56.4% clock advantage for the Ryzen 7 7800X3D (base: 4.4 GHz vs 2.8 GHz). The Ryzen 7 7800X3D uses the Raphael (Zen4) (2022−2023) architecture (5 nm), while the Phenom II X3 720 uses Heka (2009−2010) (45 nm). In PassMark, the Ryzen 7 7800X3D scores 34,293 against the Phenom II X3 720's 1,600 — a 182.2% lead for the Ryzen 7 7800X3D. Geekbench 6 single-core — the metric most relevant to gaming — records 2,700 vs 380, a 150.6% lead for the Ryzen 7 7800X3D that directly translates to higher frame rates. Multi-core Geekbench: 15,000 vs 980 (175.5% advantage for the Ryzen 7 7800X3D). L3 cache: 96 MB (total) on the Ryzen 7 7800X3D vs 6 MB (total) on the Phenom II X3 720.
| Feature | Ryzen 7 7800X3D | Phenom II X3 720 |
|---|---|---|
| Cores / Threads | 8 / 16+167% | 3 / 3 |
| Boost Clock | 5 GHz+79% | 2.8 GHz |
| Base Clock | 4.4 GHz+57% | 2.8 GHz |
| L3 Cache | 96 MB (total)+1500% | 6 MB (total) |
| L2 Cache | 1 MB (per core)+100% | 512 kB (per core) |
| Process | 5 nm-89% | 45 nm |
| Architecture | Raphael (Zen4) (2022−2023) | Heka (2009−2010) |
| PassMark | 34,293+2043% | 1,600 |
| Cinebench R23 Multi | 18,500 | — |
| Geekbench 6 Single | 2,700+611% | 380 |
| Geekbench 6 Multi | 15,000+1431% | 980 |
Memory & Platform
The Ryzen 7 7800X3D uses the AM5 socket (PCIe 5.0), while the Phenom II X3 720 uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-5200 on the Ryzen 7 7800X3D versus DDR3-1333 on the Phenom II X3 720 — 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 16 GB — 155.6% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 28 (Ryzen 7 7800X3D) vs 16 (Phenom II X3 720) — the Ryzen 7 7800X3D offers 12 more lanes for additional GPUs or NVMe drives. Chipset compatibility: X670E,X670,B650E,B650,A620 (Ryzen 7 7800X3D) and AM3,AM2+ (Phenom II X3 720).
| Feature | Ryzen 7 7800X3D | Phenom II X3 720 |
|---|---|---|
| Socket | AM5 | AM3 |
| PCIe Generation | PCIe 5.0+150% | PCIe 2.0 |
| Max RAM Speed | DDR5-5200+67% | DDR3-1333 |
| Max RAM Capacity | 128 GB+700% | 16 GB |
| RAM Channels | 2 | 2 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 28+75% | 16 |
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. Both support AMD-V virtualization. The Ryzen 7 7800X3D includes integrated graphics (AMD Radeon Graphics (2-core)), while the Phenom II X3 720 requires a dedicated GPU. Primary use case: Ryzen 7 7800X3D targets Gaming, Phenom II X3 720 targets Legacy Desktop. Direct competitor: Ryzen 7 7800X3D rivals Intel Core i7-14700K.
| Feature | Ryzen 7 7800X3D | Phenom II X3 720 |
|---|---|---|
| Integrated GPU | Yes | No |
| IGPU Model | AMD Radeon Graphics (2-core) | None |
| Unlocked | Yes | Yes |
| AVX-512 | Yes | No |
| Virtualization | AMD-V | AMD-V |
| Target Use | Gaming | Legacy Desktop |
Value Analysis
The Ryzen 7 7800X3D launched at $449 MSRP, while the Phenom II X3 720 debuted at $130. At current prices ($384 vs $64), the Phenom II X3 720 is $320 cheaper. In terms of value (PassMark points per dollar), the Ryzen 7 7800X3D delivers 89.3 pts/$ vs 25.0 pts/$ for the Phenom II X3 720 — making the Ryzen 7 7800X3D the 112.5% better value option.
| Feature | Ryzen 7 7800X3D | Phenom II X3 720 |
|---|---|---|
| MSRP | $449 | $130-71% |
| Avg Price (30d) | $384 | $64-83% |
| Performance per Dollar | 89.3+257% | 25.0 |
| Release Date | 2023 | 2010 |
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