Phenom II X4 820 vs Celeron B815
Phenom II X4 820
Celeron B815
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 X4 820 is positioned at rank 916 and the Celeron B815 is on rank 799, so the Celeron B815 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 X4 820
Performance Per Dollar Celeron B815
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Phenom II X4 820 | Celeron B815 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($50) | ✅ More affordable ($15) |
| Longevity | 🛑 Legacy (Deneb (2009−2011) / 45 nm) | 🛑 Legacy (Sandy Bridge (2011−2013) / 32 nm) |
💎 Value Proposition
| Insight | Phenom II X4 820 | Celeron B815 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+230%) |
| Upfront Cost | ⚠️ Higher cost ($50) | ✅ More affordable ($15) |
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 X4 820 and Celeron B815
Phenom II X4 820
The Phenom II X4 820 is manufactured by AMD. It was released in 1 September 2009 (16 years ago). It is based on the Deneb (2009−2011) architecture. It features 4 cores and 4 threads. Base frequency is 2.8 GHz, with boost up to 2.8 GHz. L3 cache: 4 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: 2,114 points. Launch price was $90.
Celeron B815
The Celeron B815 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 1.6 GHz, with boost up to 1.6 GHz. L3 cache: 2 MB (total). L2 cache: 256K (per core). Built on 32 nm process technology. Socket: PGA988. Thermal design power (TDP): 35 Watt. Memory support: DDR3. Passmark benchmark score: 2,093 points. Launch price was $86.
Processing Power
The Phenom II X4 820 packs 4 cores / 4 threads, while the Celeron B815 offers 2 cores / 2 threads — the Phenom II X4 820 has 2 more cores. Boost clocks reach 2.8 GHz on the Phenom II X4 820 versus 1.6 GHz on the Celeron B815 — a 54.5% clock advantage for the Phenom II X4 820 (base: 2.8 GHz vs 1.6 GHz). The Phenom II X4 820 uses the Deneb (2009−2011) architecture (45 nm), while the Celeron B815 uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Phenom II X4 820 scores 2,114 against the Celeron B815's 2,093 — a 1% lead for the Phenom II X4 820. L3 cache: 4 MB (total) on the Phenom II X4 820 vs 2 MB (total) on the Celeron B815.
| Feature | Phenom II X4 820 | Celeron B815 |
|---|---|---|
| Cores / Threads | 4 / 4+100% | 2 / 2 |
| Boost Clock | 2.8 GHz+75% | 1.6 GHz |
| Base Clock | 2.8 GHz+75% | 1.6 GHz |
| L3 Cache | 4 MB (total)+100% | 2 MB (total) |
| L2 Cache | 512 kB (per core)+100% | 256K (per core) |
| Process | 45 nm | 32 nm-29% |
| Architecture | Deneb (2009−2011) | Sandy Bridge (2011−2013) |
| PassMark | 2,114+1% | 2,093 |
Memory & Platform
The Phenom II X4 820 uses the AM3 socket (PCIe 2.0), while the Celeron B815 uses PGA988 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Phenom II X4 820 | Celeron B815 |
|---|---|---|
| Socket | AM3 | PGA988 |
| PCIe Generation | PCIe 2.0 | PCIe 2.0 |
| Max RAM Speed | — | DDR3-1333 |
| Max RAM Capacity | — | 16 GB |
| RAM Channels | — | 2 |
| ECC Support | — | ❌ |
| PCIe Lanes | — | 16 |
Advanced Features
Virtualization: not specified (Phenom II X4 820) / VT-x (Celeron B815). The Celeron B815 includes integrated graphics (HD Graphics (Sandy Bridge)), while the Phenom II X4 820 requires a dedicated GPU. Primary use case: Celeron B815 targets Budget. Direct competitor: Celeron B815 rivals Pentium 967.
| Feature | Phenom II X4 820 | Celeron B815 |
|---|---|---|
| Integrated GPU | — | Yes |
| IGPU Model | — | HD Graphics (Sandy Bridge) |
| Unlocked | — | No |
| AVX-512 | — | No |
| Virtualization | — | VT-x |
| Target Use | — | Budget |
Value Analysis
The Phenom II X4 820 launched at $150 MSRP, while the Celeron B815 debuted at $86. At current prices ($50 vs $15), the Celeron B815 is $35 cheaper. In terms of value (PassMark points per dollar), the Phenom II X4 820 delivers 42.3 pts/$ vs 139.5 pts/$ for the Celeron B815 — making the Celeron B815 the 107% better value option.
| Feature | Phenom II X4 820 | Celeron B815 |
|---|---|---|
| MSRP | $150 | $86-43% |
| Avg Price (30d) | $50 | $15-70% |
| Performance per Dollar | 42.3 | 139.5+230% |
| Release Date | 2009 | 2012 |
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