Pentium III 1400S vs Ryzen 9 5900X
Pentium III 1400S
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 Pentium III 1400S is positioned at rank #1128 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 Pentium III 1400S
Performance Per Dollar Ryzen 9 5900X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Pentium III 1400S | Ryzen 9 5900X |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($250) | ⚠️ Higher cost ($350) |
| Longevity | 🛑 Legacy (Tualatin (2000−2002) / 130 nm) | ✨ Modern (Vermeer (Zen3) (2020−2022) / 7 nm, 12 nm) |
💎 Value Proposition
| Insight | Pentium III 1400S | Ryzen 9 5900X |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+12104%) |
| Upfront Cost | ✅ More affordable ($250) | ⚠️ 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 Pentium III 1400S and Ryzen 9 5900X
Pentium III 1400S
The Pentium III 1400S is manufactured by Intel. It was released in 2007-01-01. It is based on the Tualatin (2000−2002) architecture. It features 1 cores and 1 threads. Max frequency: 1.4 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 130 nm process technology. Socket: PGA370. Thermal design power (TDP): 32 Watt. Passmark benchmark score: 228 points. Launch price was $69.
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 Pentium III 1400S packs 1 cores / 1 threads, while the Ryzen 9 5900X offers 12 cores / 24 threads — the Ryzen 9 5900X has 11 more cores. Boost clocks reach 1.4 GHz on the Pentium III 1400S versus 4.8 GHz on the Ryzen 9 5900X — a 109.7% clock advantage for the Ryzen 9 5900X. The Pentium III 1400S uses the Tualatin (2000−2002) architecture (130 nm), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the Pentium III 1400S scores 228 against the Ryzen 9 5900X's 38,955 — a 197.7% lead for the Ryzen 9 5900X. L3 cache: 0 kB on the Pentium III 1400S vs 64 MB on the Ryzen 9 5900X.
| Feature | Pentium III 1400S | Ryzen 9 5900X |
|---|---|---|
| Cores / Threads | 1 / 1 | 12 / 24+1100% |
| Boost Clock | 1.4 GHz | 4.8 GHz+243% |
| Base Clock | — | 3.7 GHz |
| L3 Cache | 0 kB | 64 MB |
| L2 Cache | 512 kB | 512K (per core) |
| Process | 130 nm | 7 nm, 12 nm-95% |
| Architecture | Tualatin (2000−2002) | Vermeer (Zen3) (2020−2022) |
| PassMark | 228 | 38,955+16986% |
| Cinebench R23 Multi | — | 21,000 |
| Geekbench 6 Single | — | 2,174 |
| Geekbench 6 Multi | — | 11,888 |
Memory & Platform
The Pentium III 1400S uses the PGA370 socket (PCIe 1.1), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches PC133 on the Pentium III 1400S versus DDR4-3200 on the Ryzen 9 5900X — the Pentium III 1400S supports 188.3% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 9 5900X supports up to 128 GB of RAM compared to 4 GB — 187.9% more capacity for professional workloads. Memory channels: 1 (Pentium III 1400S) vs 2 (Ryzen 9 5900X). PCIe lanes: 0 (Pentium III 1400S) vs 24 (Ryzen 9 5900X) — the Ryzen 9 5900X offers 24 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel 815,VIA Apollo Pro 133T (Pentium III 1400S) and A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X).
| Feature | Pentium III 1400S | Ryzen 9 5900X |
|---|---|---|
| Socket | PGA370 | AM4 |
| PCIe Generation | PCIe 1.1 | PCIe 4.0+264% |
| Max RAM Speed | PC133+3225% | DDR4-3200 |
| Max RAM Capacity | 4 GB | 128 GB+3100% |
| RAM Channels | 1 | 2+100% |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 0 | 24 |
Advanced Features
Virtualization support: No (Pentium III 1400S) vs AMD-V (Ryzen 9 5900X). Primary use case: Ryzen 9 5900X targets Workstation. Direct competitor: Ryzen 9 5900X rivals Core i9-12900K.
| Feature | Pentium III 1400S | Ryzen 9 5900X |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | — | Yes |
| AVX-512 | No | No |
| Virtualization | No | AMD-V |
| Target Use | — | Workstation |
Value Analysis
The Pentium III 1400S launched at $250 MSRP, while the Ryzen 9 5900X debuted at $549. At current prices ($250 vs $350), the Pentium III 1400S is $100 cheaper. In terms of value (PassMark points per dollar), the Pentium III 1400S delivers 0.9 pts/$ vs 111.3 pts/$ for the Ryzen 9 5900X — making the Ryzen 9 5900X the 196.7% better value option.
| Feature | Pentium III 1400S | Ryzen 9 5900X |
|---|---|---|
| MSRP | $250-54% | $549 |
| Avg Price (30d) | $250-29% | $350 |
| Performance per Dollar | 0.9 | 111.3+12267% |
| Release Date | 2002 | 2020 |
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