Phenom X4 9750B vs Ryzen 9 7950X3D
Phenom X4 9750B
Popular choices:
Ryzen 9 7950X3D
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 Phenom X4 9750B is positioned at rank #1047 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 Phenom X4 9750B
Performance Per Dollar Ryzen 9 7950X3D
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Phenom X4 9750B | Ryzen 9 7950X3D |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($34) | ⚠️ Higher cost ($486) |
| Longevity | 🛑 Legacy (Agena (2007−2008) / 65 nm) | ✨ Modern (Raphael (Zen4) (2022−2023) / 5 nm, 6 nm) |
💎 Value Proposition
| Insight | Phenom X4 9750B | Ryzen 9 7950X3D |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+187%) |
| Upfront Cost | ✅ More affordable ($34) | ⚠️ Higher cost ($486) |
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 Phenom X4 9750B and Ryzen 9 7950X3D
Phenom X4 9750B
The Phenom X4 9750B is manufactured by AMD. It was released in 2009-01-01. It is based on the Agena (2007−2008) architecture. It features 4 cores and 4 threads. Max frequency: 2.4 GHz. L3 cache: 2 MB (total). L2 cache: 512 kB (per core). Built on 65 nm process technology. Socket: AM2+. Thermal design power (TDP): 95 Watt. Passmark benchmark score: 1,520 points. Launch price was $149.
Ryzen 9 7950X3D
The Ryzen 9 7950X3D 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 16 cores and 32 threads. Base frequency is 4.2 GHz, with boost up to 5.7 GHz. L3 cache: 128 MB (total). L2 cache: 1 MB (per core). Built on 5 nm, 6 nm process technology. Socket: AM5. Thermal design power (TDP): 120 Watt. Memory support: DDR5-5200. Passmark benchmark score: 62,323 points. Launch price was $699.
Processing Power
The Phenom X4 9750B packs 4 cores / 4 threads, while the Ryzen 9 7950X3D offers 16 cores / 32 threads — the Ryzen 9 7950X3D has 12 more cores. Boost clocks reach 2.4 GHz on the Phenom X4 9750B versus 5.7 GHz on the Ryzen 9 7950X3D — a 81.5% clock advantage for the Ryzen 9 7950X3D. The Phenom X4 9750B uses the Agena (2007−2008) architecture (65 nm), while the Ryzen 9 7950X3D uses Raphael (Zen4) (2022−2023) (5 nm, 6 nm). In PassMark, the Phenom X4 9750B scores 1,520 against the Ryzen 9 7950X3D's 62,323 — a 190.5% lead for the Ryzen 9 7950X3D. Geekbench 6 single-core — the metric most relevant to gaming — records 300 vs 2,926, a 162.8% lead for the Ryzen 9 7950X3D that directly translates to higher frame rates. Multi-core Geekbench: 1,000 vs 19,643 (180.6% advantage for the Ryzen 9 7950X3D). L3 cache: 2 MB (total) on the Phenom X4 9750B vs 128 MB (total) on the Ryzen 9 7950X3D.
| Feature | Phenom X4 9750B | Ryzen 9 7950X3D |
|---|---|---|
| Cores / Threads | 4 / 4 | 16 / 32+300% |
| Boost Clock | 2.4 GHz | 5.7 GHz+138% |
| Base Clock | — | 4.2 GHz |
| L3 Cache | 2 MB (total) | 128 MB (total)+6300% |
| L2 Cache | 512 kB (per core) | 1 MB (per core)+100% |
| Process | 65 nm | 5 nm, 6 nm-92% |
| Architecture | Agena (2007−2008) | Raphael (Zen4) (2022−2023) |
| PassMark | 1,520 | 62,323+4000% |
| Cinebench R23 Multi | — | 38,581 |
| Geekbench 6 Single | 300 | 2,926+875% |
| Geekbench 6 Multi | 1,000 | 19,643+1864% |
Memory & Platform
The Phenom X4 9750B uses the AM2+ socket (PCIe 2.0), while the Ryzen 9 7950X3D uses AM5 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR2-1066 on the Phenom X4 9750B versus DDR5-5200 on the Ryzen 9 7950X3D — the Ryzen 9 7950X3D supports 85.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 9 7950X3D supports up to 128 GB of RAM compared to 8 GB — 176.5% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Phenom X4 9750B) vs 28 (Ryzen 9 7950X3D) — the Ryzen 9 7950X3D offers 12 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AM2+,AM2 (Phenom X4 9750B) and AMD X670E,AMD X670,AMD B650E,AMD B650 (Ryzen 9 7950X3D).
| Feature | Phenom X4 9750B | Ryzen 9 7950X3D |
|---|---|---|
| Socket | AM2+ | AM5 |
| PCIe Generation | PCIe 2.0 | PCIe 5.0+150% |
| Max RAM Speed | DDR2-1066 | DDR5-5200+150% |
| Max RAM Capacity | 8 GB | 128 GB+1500% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ✅ |
| PCIe Lanes | 16 | 28+75% |
Advanced Features
Only the Ryzen 9 7950X3D has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Only the Ryzen 9 7950X3D supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: AMD-V (Phenom X4 9750B) vs true (Ryzen 9 7950X3D). The Ryzen 9 7950X3D includes integrated graphics (Radeon Graphics), while the Phenom X4 9750B requires a dedicated GPU. Primary use case: Phenom X4 9750B targets Legacy Desktop. Direct competitor: Ryzen 9 7950X3D rivals Core i9-13900K.
| Feature | Phenom X4 9750B | Ryzen 9 7950X3D |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | None | Radeon Graphics |
| Unlocked | No | Yes |
| AVX-512 | No | Yes |
| Virtualization | AMD-V | true |
| Target Use | Legacy Desktop | — |
Value Analysis
The Phenom X4 9750B launched at $215 MSRP, while the Ryzen 9 7950X3D debuted at $699. At current prices ($34 vs $486), the Phenom X4 9750B is $452 cheaper. In terms of value (PassMark points per dollar), the Phenom X4 9750B delivers 44.7 pts/$ vs 128.2 pts/$ for the Ryzen 9 7950X3D — making the Ryzen 9 7950X3D the 96.6% better value option.
| Feature | Phenom X4 9750B | Ryzen 9 7950X3D |
|---|---|---|
| MSRP | $215-69% | $699 |
| Avg Price (30d) | $34-93% | $486 |
| Performance per Dollar | 44.7 | 128.2+187% |
| Release Date | 2008 | 2023 |
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