CPU
GPU
Phenom II X2 550
Pentium 977
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 X2 550 is positioned at rank 516 and the Pentium 977 is on rank 1117, so the Phenom II X2 550 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 X2 550
Performance Per Dollar Pentium 977
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Phenom II X2 550 | Pentium 977 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($10) |
| Longevity | 🛑 Legacy (Callisto (2009−2010) / 45 nm) | 🛑 Legacy (Sandy Bridge (2011−2013) / 32 nm) |
💎 Value Proposition
| Insight | Phenom II X2 550 | Pentium 977 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($10) |
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 X2 550 and Pentium 977
Phenom II X2 550
The Phenom II X2 550 is manufactured by AMD. It was released in 4 November 2009 (16 years ago). It is based on the Callisto (2009−2010) architecture. It features 2 cores and 2 threads. Base frequency is 3.1 GHz, with boost up to 3.1 GHz. L3 cache: 6 MB (total). L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 80 Watt. Memory support: DDR3. Passmark benchmark score: 1,142 points. Launch price was $133.
Pentium 977
The Pentium 977 is manufactured by Intel. It was released in 1 January 2012 (13 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 2 cores and 2 threads. Base frequency is 1.4 GHz, with boost up to 1.4 GHz. L3 cache: 2 MB (total). L2 cache: 256K (per core). Built on 32 nm process technology. Socket: BGA1023. Thermal design power (TDP): 17 Watt. Memory support: DDR3. Passmark benchmark score: 1,148 points. Launch price was $134.
Processing Power
Both the Phenom II X2 550 and Pentium 977 share an identical 2-core/2-thread configuration. Boost clocks reach 3.1 GHz on the Phenom II X2 550 versus 1.4 GHz on the Pentium 977 — a 75.6% clock advantage for the Phenom II X2 550 (base: 3.1 GHz vs 1.4 GHz). The Phenom II X2 550 uses the Callisto (2009−2010) architecture (45 nm), while the Pentium 977 uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Phenom II X2 550 scores 1,142 against the Pentium 977's 1,148 — a 0.5% lead for the Pentium 977. L3 cache: 6 MB (total) on the Phenom II X2 550 vs 2 MB (total) on the Pentium 977.
| Feature | Phenom II X2 550 | Pentium 977 |
|---|---|---|
| Cores / Threads | 2 / 2 | 2 / 2 |
| Boost Clock | 3.1 GHz+121% | 1.4 GHz |
| Base Clock | 3.1 GHz+121% | 1.4 GHz |
| L3 Cache | 6 MB (total)+200% | 2 MB (total) |
| L2 Cache | 512 kB (per core)+100% | 256K (per core) |
| Process | 45 nm | 32 nm-29% |
| Architecture | Callisto (2009−2010) | Sandy Bridge (2011−2013) |
| PassMark | 1,142 | 1,148 |
Memory & Platform
The Phenom II X2 550 uses the AM3 socket (PCIe 2.0), while the Pentium 977 uses BGA1023 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Phenom II X2 550 | Pentium 977 |
|---|---|---|
| Socket | AM3 | BGA1023 |
| PCIe Generation | PCIe 2.0 | PCIe 2.0 |
Top Performing CPUs
The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
You May Also Compare
Similar CPU comparisons based on Phenom II X2 550 and Pentium 977
