Xeon X5660 vs Ryzen 9 5900X
Xeon X5660
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 Xeon X5660 is positioned at rank #990 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 Xeon X5660
Performance Per Dollar Ryzen 9 5900X
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon X5660 | Ryzen 9 5900X |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($10) | ⚠️ Higher cost ($350) |
| Longevity | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) | ✨ Modern (Vermeer (Zen3) (2020−2022) / 7 nm, 12 nm) |
💎 Value Proposition
| Insight | Xeon X5660 | Ryzen 9 5900X |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+437%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($10) | ⚠️ 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 Xeon X5660 and Ryzen 9 5900X
Xeon X5660
The Xeon X5660 is manufactured by Intel. It was released in 16 March 2010 (15 years ago). It is based on the Westmere-EP (2010−2011) architecture. It features 6 cores and 12 threads. Base frequency is 2.8 GHz, with boost up to 3.2 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1366. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 5,979 points. Launch price was $33.
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 Xeon X5660 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 3.2 GHz on the Xeon X5660 versus 4.8 GHz on the Ryzen 9 5900X — a 40% clock advantage for the Ryzen 9 5900X (base: 2.8 GHz vs 3.7 GHz). The Xeon X5660 uses the Westmere-EP (2010−2011) architecture (32 nm), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the Xeon X5660 scores 5,979 against the Ryzen 9 5900X's 38,955 — a 146.8% lead for the Ryzen 9 5900X. L3 cache: 12 MB (total) on the Xeon X5660 vs 64 MB on the Ryzen 9 5900X.
| Feature | Xeon X5660 | Ryzen 9 5900X |
|---|---|---|
| Cores / Threads | 6 / 12 | 12 / 24+100% |
| Boost Clock | 3.2 GHz | 4.8 GHz+50% |
| Base Clock | 2.8 GHz | 3.7 GHz+32% |
| L3 Cache | 12 MB (total) | 64 MB+433% |
| L2 Cache | 256 kB (per core) | 512K (per core)+100% |
| Process | 32 nm | 7 nm, 12 nm-78% |
| Architecture | Westmere-EP (2010−2011) | Vermeer (Zen3) (2020−2022) |
| PassMark | 5,979 | 38,955+552% |
| Cinebench R23 Multi | — | 21,000 |
| Geekbench 6 Single | — | 2,174 |
| Geekbench 6 Multi | — | 11,888 |
Memory & Platform
The Xeon X5660 uses the LGA1366 socket (PCIe 2.0), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1333 on the Xeon X5660 versus DDR4-3200 on the Ryzen 9 5900X — the Ryzen 9 5900X supports 28.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. Memory channels: 3 (Xeon X5660) vs 2 (Ryzen 9 5900X). Chipset compatibility: Intel X58,Intel 5520 (Xeon X5660) and A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X).
| Feature | Xeon X5660 | Ryzen 9 5900X |
|---|---|---|
| Socket | LGA1366 | AM4 |
| PCIe Generation | PCIe 2.0 | PCIe 4.0+100% |
| Max RAM Speed | DDR3-1333 | DDR4-3200+33% |
| Max RAM Capacity | — | 128 GB |
| RAM Channels | 3+50% | 2 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | — | 24 |
Advanced Features
Only the Ryzen 9 5900X has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: VT-x, VT-d, EPT (Xeon X5660) vs AMD-V (Ryzen 9 5900X). Primary use case: Xeon X5660 targets Workstation, Ryzen 9 5900X targets Workstation. Direct competitor: Xeon X5660 rivals Core i7-980X; Ryzen 9 5900X rivals Core i9-12900K.
| Feature | Xeon X5660 | Ryzen 9 5900X |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | No | Yes |
| AVX-512 | No | No |
| Virtualization | VT-x, VT-d, EPT | AMD-V |
| Target Use | Workstation | Workstation |
Value Analysis
The Xeon X5660 launched at $1219 MSRP, while the Ryzen 9 5900X debuted at $549. At current prices ($10 vs $350), the Xeon X5660 is $340 cheaper. In terms of value (PassMark points per dollar), the Xeon X5660 delivers 597.9 pts/$ vs 111.3 pts/$ for the Ryzen 9 5900X — making the Xeon X5660 the 137.2% better value option.
| Feature | Xeon X5660 | Ryzen 9 5900X |
|---|---|---|
| MSRP | $1219 | $549-55% |
| Avg Price (30d) | $10-97% | $350 |
| Performance per Dollar | 597.9+437% | 111.3 |
| Release Date | 2010 | 2020 |
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