Celeron B840 vs Atom E3845
Celeron B840
Atom E3845
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 B840 is positioned at rank 1028 and the Atom E3845 is on rank 764, so the Atom E3845 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Celeron B840
Performance Per Dollar Atom E3845
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Celeron B840 | Atom E3845 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($15) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Sandy Bridge (2011−2013) / 32 nm) | 🛑 Legacy (Bay Trail-I (2013) / 22 nm) |
💎 Value Proposition
| Insight | Celeron B840 | Atom E3845 |
|---|---|---|
| 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 B840 and Atom E3845
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.
Atom E3845
The Atom E3845 is manufactured by Intel. It was released in 8 October 2013 (12 years ago). It is based on the Bay Trail-I (2013) architecture. It features 4 cores and 4 threads. Max frequency: 1.91 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 22 nm process technology. Socket: FCBGA1170. Thermal design power (TDP): 10 Watt. Memory support: DDR3. Passmark benchmark score: 1,071 points. Launch price was $69.
Processing Power
The Celeron B840 packs 2 cores / 2 threads, while the Atom E3845 offers 4 cores / 4 threads — the Atom E3845 has 2 more cores. Boost clocks reach 1.9 GHz on the Celeron B840 versus 1.91 GHz on the Atom E3845 — a 0.5% clock advantage for the Atom E3845. The Celeron B840 uses the Sandy Bridge (2011−2013) architecture (32 nm), while the Atom E3845 uses Bay Trail-I (2013) (22 nm). In PassMark, the Celeron B840 scores 1,065 against the Atom E3845's 1,071 — a 0.6% lead for the Atom E3845. L3 cache: 2 MB (total) on the Celeron B840 vs 0 kB on the Atom E3845.
| Feature | Celeron B840 | Atom E3845 |
|---|---|---|
| Cores / Threads | 2 / 2 | 4 / 4+100% |
| Boost Clock | 1.9 GHz | 1.91 GHz |
| Base Clock | 1.9 GHz | — |
| L3 Cache | 2 MB (total) | 0 kB |
| L2 Cache | 256K (per core) | 512 kB (per core)+100% |
| Process | 32 nm | 22 nm-31% |
| Architecture | Sandy Bridge (2011−2013) | Bay Trail-I (2013) |
| PassMark | 1,065 | 1,071 |
| Geekbench 6 Single | 450 | — |
| Geekbench 6 Multi | 790 | — |
Memory & Platform
The Celeron B840 uses the PGA988 socket (PCIe 2.0), while the Atom E3845 uses FCBGA1170 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 1333 on the Celeron B840 versus DDR3L-1333 on the Atom E3845 — the Celeron B840 supports 199.1% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron B840 supports up to 16 of RAM compared to 8 GB — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Celeron B840) vs 4 (Atom E3845) — the Celeron B840 offers 12 more lanes for additional GPUs or NVMe drives. Chipset compatibility: HM65,HM67,QM67 (Celeron B840) and Intel FCBGA1170 (Atom E3845).
| Feature | Celeron B840 | Atom E3845 |
|---|---|---|
| Socket | PGA988 | FCBGA1170 |
| PCIe Generation | PCIe 2.0 | PCIe 2.0 |
| Max RAM Speed | 1333+44333% | DDR3L-1333 |
| Max RAM Capacity | 16 | 8 GB+52428700% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ✅ |
| PCIe Lanes | 16+300% | 4 |
Advanced Features
Virtualization: true (Celeron B840) / not specified (Atom E3845). Both include integrated graphics — Intel HD Graphics (Sandy Bridge) (Celeron B840) and Intel HD Graphics (Bay Trail) (Atom E3845) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Celeron B840 targets Budget. Direct competitor: Celeron B840 rivals Pentium B940.
| Feature | Celeron B840 | Atom E3845 |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | Intel HD Graphics (Sandy Bridge) | Intel HD Graphics (Bay Trail) |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | true | — |
| Target Use | Budget | — |
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