Celeron B815 vs Core i7-640M
Celeron B815
Core i7-640M
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 Celeron B815 is positioned at rank 799 and the Core i7-640M is on rank 107, so the Core i7-640M offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Celeron B815
Performance Per Dollar Core i7-640M
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Celeron B815 | Core i7-640M |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($15) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Sandy Bridge (2011−2013) / 32 nm) | 🛑 Legacy (Arrandale (2010−2011) / 32 nm) |
💎 Value Proposition
| Insight | Celeron B815 | Core i7-640M |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($15) | ✅ More affordable ($0) |
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 Celeron B815 and Core i7-640M
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.
Core i7-640M
The Core i7-640M is manufactured by Intel. It was released in 1 September 2010 (15 years ago). It is based on the Arrandale (2010−2011) architecture. It features 2 cores and 4 threads. Base frequency is 2.8 GHz, with boost up to 3.46 GHz. L3 cache: 4 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: 2,092 points. Launch price was $346.
Processing Power
The Celeron B815 packs 2 cores / 2 threads, matching the Core i7-640M's 2 cores. Boost clocks reach 1.6 GHz on the Celeron B815 versus 3.46 GHz on the Core i7-640M — a 73.5% clock advantage for the Core i7-640M (base: 1.6 GHz vs 2.8 GHz). The Celeron B815 uses the Sandy Bridge (2011−2013) architecture (32 nm), while the Core i7-640M uses Arrandale (2010−2011) (32 nm). In PassMark, the Celeron B815 scores 2,093 against the Core i7-640M's 2,092 — a 0% lead for the Celeron B815. L3 cache: 2 MB (total) on the Celeron B815 vs 4 MB (total) on the Core i7-640M.
| Feature | Celeron B815 | Core i7-640M |
|---|---|---|
| Cores / Threads | 2 / 2 | 2 / 4 |
| Boost Clock | 1.6 GHz | 3.46 GHz+116% |
| Base Clock | 1.6 GHz | 2.8 GHz+75% |
| L3 Cache | 2 MB (total) | 4 MB (total)+100% |
| L2 Cache | 256K (per core) | 256K (per core) |
| Process | 32 nm | 32 nm |
| Architecture | Sandy Bridge (2011−2013) | Arrandale (2010−2011) |
| PassMark | 2,093 | 2,092 |
Memory & Platform
Both processors use the PGA988 socket with PCIe 2.0. Maximum memory speed reaches DDR3-1333 on the Celeron B815 versus 1066 on the Core i7-640M — the Core i7-640M supports 198.9% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron B815 supports up to 16 GB of RAM compared to 8 — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes. Chipset compatibility: HM65,HM67,QM67,QM77 (Celeron B815) and HM55,HM57,QM57 (Core i7-640M).
| Feature | Celeron B815 | Core i7-640M |
|---|---|---|
| Socket | PGA988 | PGA988 |
| PCIe Generation | PCIe 2.0 | PCIe 2.0 |
| Max RAM Speed | DDR3-1333 | 1066+35433% |
| Max RAM Capacity | 16 GB+209715100% | 8 |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 16 | 16 |
Advanced Features
Neither processor supports overclocking. Virtualization support: VT-x (Celeron B815) vs true (Core i7-640M). Both include integrated graphics — HD Graphics (Sandy Bridge) (Celeron B815) and Intel HD Graphics (Ironlake) (Core i7-640M) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Celeron B815 targets Budget. Direct competitor: Celeron B815 rivals Pentium 967; Core i7-640M rivals Core 2 Duo T9600.
| Feature | Celeron B815 | Core i7-640M |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | HD Graphics (Sandy Bridge) | Intel HD Graphics (Ironlake) |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | VT-x | true |
| Target Use | Budget | — |
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