Core 2 Duo T5870 vs Celeron B815
Core 2 Duo T5870
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 Core 2 Duo T5870 is positioned at rank 538 and the Celeron B815 is on rank 799, so the Core 2 Duo T5870 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Core 2 Duo T5870
Performance Per Dollar Celeron B815
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core 2 Duo T5870 | Celeron B815 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($15) |
| Longevity | 🛑 Legacy (Merom (2006−2008) / 65 nm) | 🛑 Legacy (Sandy Bridge (2011−2013) / 32 nm) |
💎 Value Proposition
| Insight | Core 2 Duo T5870 | Celeron B815 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($0) | ⚠️ Higher cost ($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 Core 2 Duo T5870 and Celeron B815
Core 2 Duo T5870
The Core 2 Duo T5870 is manufactured by Intel. It was released in 2008-01-01. It is based on the Merom (2006−2008) architecture. It features 2 cores and 2 threads. Base frequency is 2 GHz, with boost up to 2 GHz. L3 cache: 2 MB L2 Cache. L2 cache: 2 MB. Built on 65 nm process technology. Thermal design power (TDP): 35 Watt. Passmark benchmark score: 2,089 points. Launch price was $249.
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
Both the Core 2 Duo T5870 and Celeron B815 share an identical 2-core/2-thread configuration. Boost clocks reach 2 GHz on the Core 2 Duo T5870 versus 1.6 GHz on the Celeron B815 — a 22.2% clock advantage for the Core 2 Duo T5870 (base: 2 GHz vs 1.6 GHz). The Core 2 Duo T5870 uses the Merom (2006−2008) architecture (65 nm), while the Celeron B815 uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Core 2 Duo T5870 scores 2,089 against the Celeron B815's 2,093 — a 0.2% lead for the Celeron B815. L3 cache: 2 MB L2 Cache on the Core 2 Duo T5870 vs 2 MB (total) on the Celeron B815.
| Feature | Core 2 Duo T5870 | Celeron B815 |
|---|---|---|
| Cores / Threads | 2 / 2 | 2 / 2 |
| Boost Clock | 2 GHz+25% | 1.6 GHz |
| Base Clock | 2 GHz+25% | 1.6 GHz |
| L3 Cache | 2 MB L2 Cache | 2 MB (total) |
| L2 Cache | 2 MB+700% | 256K (per core) |
| Process | 65 nm | 32 nm-51% |
| Architecture | Merom (2006−2008) | Sandy Bridge (2011−2013) |
| PassMark | 2,089 | 2,093 |
| Geekbench 6 Single | 203 | — |
| Geekbench 6 Multi | 314 | — |
Memory & Platform
Maximum memory speed reaches DDR2-800 on the Core 2 Duo T5870 versus DDR3-1333 on the Celeron B815 — the Celeron B815 supports 40% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron B815 supports up to 16 GB of RAM compared to 4 GB — 120% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 0 (Core 2 Duo T5870) vs 16 (Celeron B815) — the Celeron B815 offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: GM965,GM45,PM45 (Core 2 Duo T5870) and HM65,HM67,QM67,QM77 (Celeron B815).
| Feature | Core 2 Duo T5870 | Celeron B815 |
|---|---|---|
| Socket | — | PGA988 |
| PCIe Generation | PCIe 1.1 | PCIe 2.0+82% |
| Max RAM Speed | DDR2-800 | DDR3-1333+50% |
| Max RAM Capacity | 4 GB | 16 GB+300% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 0 | 16 |
Advanced Features
Neither processor supports overclocking. Both support VT-x virtualization. The Celeron B815 includes integrated graphics (HD Graphics (Sandy Bridge)), while the Core 2 Duo T5870 requires a dedicated GPU. Primary use case: Core 2 Duo T5870 targets Legacy Mobile, Celeron B815 targets Budget. Direct competitor: Celeron B815 rivals Pentium 967.
| Feature | Core 2 Duo T5870 | Celeron B815 |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | None | HD Graphics (Sandy Bridge) |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | VT-x | VT-x |
| Target Use | Legacy Mobile | Budget |
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