Phenom II X6 1055T (95W) vs Xeon E5645
Phenom II X6 1055T (95W)
Xeon E5645
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. The Phenom II X6 1055T (95W) is positioned at rank 37 and the Xeon E5645 is on rank 669, so the Phenom II X6 1055T (95W) offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Phenom II X6 1055T (95W)
Performance Per Dollar Xeon E5645
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Phenom II X6 1055T (95W) | Xeon E5645 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($294) |
| Longevity | 🛑 Legacy (Thuban (2010) / 45 nm) | 🛑 Legacy (Westmere-EP (2010−2011) / 32 nm) |
💎 Value Proposition
| Insight | Phenom II X6 1055T (95W) | Xeon E5645 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($294) |
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 II X6 1055T (95W) and Xeon E5645
Phenom II X6 1055T (95W)
The Phenom II X6 1055T (95W) is manufactured by AMD. It was released in 2009-01-01. It is based on the Thuban (2010) architecture. It features 6 cores and 6 threads. Base frequency is 2.8 GHz, with boost up to 3.3 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: 4,965 points. Launch price was $149.
Xeon E5645
The Xeon E5645 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 2.4 GHz, with boost up to 2.67 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1366. Thermal design power (TDP): 80 Watt. Memory support: DDR3. Passmark benchmark score: 4,942 points. Launch price was $294.
Processing Power
The Phenom II X6 1055T (95W) packs 6 cores / 6 threads, matching the Xeon E5645's 6 cores. Boost clocks reach 3.3 GHz on the Phenom II X6 1055T (95W) versus 2.67 GHz on the Xeon E5645 — a 21.1% clock advantage for the Phenom II X6 1055T (95W) (base: 2.8 GHz vs 2.4 GHz). The Phenom II X6 1055T (95W) uses the Thuban (2010) architecture (45 nm), while the Xeon E5645 uses Westmere-EP (2010−2011) (32 nm). In PassMark, the Phenom II X6 1055T (95W) scores 4,965 against the Xeon E5645's 4,942 — a 0.5% lead for the Phenom II X6 1055T (95W). L3 cache: 6 MB (total) on the Phenom II X6 1055T (95W) vs 12 MB (total) on the Xeon E5645.
| Feature | Phenom II X6 1055T (95W) | Xeon E5645 |
|---|---|---|
| Cores / Threads | 6 / 6 | 6 / 12 |
| Boost Clock | 3.3 GHz+24% | 2.67 GHz |
| Base Clock | 2.8 GHz+17% | 2.4 GHz |
| L3 Cache | 6 MB (total) | 12 MB (total)+100% |
| L2 Cache | 512 kB (per core)+100% | 256 kB (per core) |
| Process | 45 nm | 32 nm-29% |
| Architecture | Thuban (2010) | Westmere-EP (2010−2011) |
| PassMark | 4,965 | 4,942 |
Memory & Platform
The Phenom II X6 1055T (95W) uses the AM3 socket (PCIe 2.0), while the Xeon E5645 uses LGA1366 (PCIe 5.0) — making them incompatible on the same motherboard.
| Feature | Phenom II X6 1055T (95W) | Xeon E5645 |
|---|---|---|
| Socket | AM3 | LGA1366 |
| PCIe Generation | PCIe 2.0 | PCIe 5.0+150% |
| Max RAM Speed | — | DDR3-1333 |
| Max RAM Capacity | — | 288 GB |
| RAM Channels | — | 3 |
| ECC Support | — | ✅ |
| PCIe Lanes | — | 0 |
Advanced Features
Virtualization: not specified (Phenom II X6 1055T (95W)) / VT-x (Xeon E5645). Primary use case: Xeon E5645 targets Server.
| Feature | Phenom II X6 1055T (95W) | Xeon E5645 |
|---|---|---|
| Integrated GPU | — | No |
| Unlocked | — | No |
| AVX-512 | — | No |
| Virtualization | — | VT-x |
| Target Use | — | Server |
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