CPU
GPU
Celeron N2815
Celeron B840
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 N2815 is positioned at rank 405 and the Celeron B840 is on rank 1028, so the Celeron N2815 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Celeron N2815
Performance Per Dollar Celeron B840
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Celeron N2815 | Celeron B840 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ✅ More affordable ($0) | ⚠️ Higher cost ($15) |
| Longevity | 🛑 Legacy (Bay Trail-M (2013−2014) / 22 nm) | 🛑 Legacy (Sandy Bridge (2011−2013) / 32 nm) |
💎 Value Proposition
| Insight | Celeron N2815 | Celeron B840 |
|---|---|---|
| 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 Celeron N2815 and Celeron B840
Celeron N2815
The Celeron N2815 is manufactured by Intel. It was released in 1 December 2013 (12 years ago). It is based on the Bay Trail-M (2013−2014) architecture. It features 2 cores and 2 threads. Base frequency is 1.86 GHz, with boost up to 2.13 GHz. L3 cache: 1 MB. L2 cache: 1 MB. Built on 22 nm process technology. Socket: FCBGA1170. Thermal design power (TDP): 7.5 Watt. Memory support: DDR3L-1066. Passmark benchmark score: 1,068 points. Launch price was $107.
Celeron B840
The Celeron B840 is manufactured by Intel. It was released in 1 July 2011 (14 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 2 cores and 2 threads. Base frequency is 1.9 GHz, with boost up to 1.9 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: 1,065 points. Launch price was $86.
Processing Power
Both the Celeron N2815 and Celeron B840 share an identical 2-core/2-thread configuration. Boost clocks reach 2.13 GHz on the Celeron N2815 versus 1.9 GHz on the Celeron B840 — a 11.4% clock advantage for the Celeron N2815 (base: 1.86 GHz vs 1.9 GHz). The Celeron N2815 uses the Bay Trail-M (2013−2014) architecture (22 nm), while the Celeron B840 uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Celeron N2815 scores 1,068 against the Celeron B840's 1,065 — a 0.3% lead for the Celeron N2815. L3 cache: 1 MB on the Celeron N2815 vs 2 MB (total) on the Celeron B840.
| Feature | Celeron N2815 | Celeron B840 |
|---|---|---|
| Cores / Threads | 2 / 2 | 2 / 2 |
| Boost Clock | 2.13 GHz+12% | 1.9 GHz |
| Base Clock | 1.86 GHz | 1.9 GHz+2% |
| L3 Cache | 1 MB | 2 MB (total)+100% |
| L2 Cache | 1 MB+300% | 256K (per core) |
| Process | 22 nm-31% | 32 nm |
| Architecture | Bay Trail-M (2013−2014) | Sandy Bridge (2011−2013) |
| PassMark | 1,068 | 1,065 |
| Geekbench 6 Single | — | 450 |
| Geekbench 6 Multi | — | 790 |
Memory & Platform
The Celeron N2815 uses the FCBGA1170 socket (PCIe 2.0), while the Celeron B840 uses PGA988 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 1066 on the Celeron N2815 versus 1333 on the Celeron B840 — the Celeron B840 supports 22.3% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron B840 supports up to 16 of RAM compared to 8 — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 4 (Celeron N2815) vs 16 (Celeron B840) — the Celeron B840 offers 12 more lanes for additional GPUs or NVMe drives. Chipset compatibility: FCBGA1170 (Celeron N2815) and HM65,HM67,QM67 (Celeron B840).
| Feature | Celeron N2815 | Celeron B840 |
|---|---|---|
| Socket | FCBGA1170 | PGA988 |
| PCIe Generation | PCIe 2.0 | PCIe 2.0 |
| Max RAM Speed | 1066 | 1333+25% |
| Max RAM Capacity | 8 | 16+100% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 4 | 16+300% |
Advanced Features
Neither processor supports overclocking. Both support true virtualization. Both include integrated graphics — Intel HD Graphics (Bay Trail) (Celeron N2815) and Intel HD Graphics (Sandy Bridge) (Celeron B840) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Celeron B840 targets Budget. Direct competitor: Celeron N2815 rivals AMD A4-1250; Celeron B840 rivals Pentium B940.
| Feature | Celeron N2815 | Celeron B840 |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | Intel HD Graphics (Bay Trail) | Intel HD Graphics (Sandy Bridge) |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | true | true |
| Target Use | — | Budget |
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