Atom E3845 vs Celeron B840
Atom E3845
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 Atom E3845 is positioned at rank 764 and the Celeron B840 is on rank 1028, 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 Atom E3845
Performance Per Dollar Celeron B840
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Atom E3845 | 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-I (2013) / 22 nm) | 🛑 Legacy (Sandy Bridge (2011−2013) / 32 nm) |
💎 Value Proposition
| Insight | Atom E3845 | 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 Atom E3845 and Celeron B840
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.
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
The Atom E3845 packs 4 cores / 4 threads, while the Celeron B840 offers 2 cores / 2 threads — the Atom E3845 has 2 more cores. Boost clocks reach 1.91 GHz on the Atom E3845 versus 1.9 GHz on the Celeron B840 — a 0.5% clock advantage for the Atom E3845. The Atom E3845 uses the Bay Trail-I (2013) architecture (22 nm), while the Celeron B840 uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Atom E3845 scores 1,071 against the Celeron B840's 1,065 — a 0.6% lead for the Atom E3845. L3 cache: 0 kB on the Atom E3845 vs 2 MB (total) on the Celeron B840.
| Feature | Atom E3845 | Celeron B840 |
|---|---|---|
| Cores / Threads | 4 / 4+100% | 2 / 2 |
| Boost Clock | 1.91 GHz | 1.9 GHz |
| Base Clock | — | 1.9 GHz |
| L3 Cache | 0 kB | 2 MB (total) |
| L2 Cache | 512 kB (per core)+100% | 256K (per core) |
| Process | 22 nm-31% | 32 nm |
| Architecture | Bay Trail-I (2013) | Sandy Bridge (2011−2013) |
| PassMark | 1,071 | 1,065 |
| Geekbench 6 Single | — | 450 |
| Geekbench 6 Multi | — | 790 |
Memory & Platform
The Atom E3845 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 DDR3L-1333 on the Atom E3845 versus 1333 on the Celeron B840 — 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: 4 (Atom E3845) vs 16 (Celeron B840) — the Celeron B840 offers 12 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel FCBGA1170 (Atom E3845) and HM65,HM67,QM67 (Celeron B840).
| Feature | Atom E3845 | Celeron B840 |
|---|---|---|
| Socket | FCBGA1170 | PGA988 |
| PCIe Generation | PCIe 2.0 | PCIe 2.0 |
| Max RAM Speed | DDR3L-1333 | 1333+44333% |
| Max RAM Capacity | 8 GB+52428700% | 16 |
| RAM Channels | 2 | 2 |
| ECC Support | ✅ | ❌ |
| PCIe Lanes | 4 | 16+300% |
Advanced Features
Virtualization: not specified (Atom E3845) / true (Celeron B840). Both include integrated graphics — Intel HD Graphics (Bay Trail) (Atom E3845) 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 B840 rivals Pentium B940.
| Feature | Atom E3845 | Celeron B840 |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | Intel HD Graphics (Bay Trail) | Intel HD Graphics (Sandy Bridge) |
| Unlocked | — | No |
| AVX-512 | — | No |
| Virtualization | — | true |
| Target Use | — | Budget |
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