Atom Z3770 vs Pentium 3805U
Atom Z3770
Pentium 3805U
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 Z3770 is positioned at rank 702 and the Pentium 3805U is on rank 344, so the Pentium 3805U offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Atom Z3770
Performance Per Dollar Pentium 3805U
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Atom Z3770 | Pentium 3805U |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | 🛑 Legacy (Bay Trail-T (2013−2014) / 22 nm) | 🛑 Legacy (Broadwell-U (2015) / 14 nm) |
💎 Value Proposition
| Insight | Atom Z3770 | Pentium 3805U |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | Equivalent pricing | Equivalent pricing |
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 Z3770 and Pentium 3805U
Atom Z3770
The Atom Z3770 is manufactured by Intel. It was released in 27 September 2013 (12 years ago). It is based on the Bay Trail-T (2013−2014) architecture. It features 4 cores and 4 threads. Base frequency is 1.46 GHz, with boost up to 2.39 GHz. L3 cache: 0 kB. L2 cache: 512K (per core). Built on 22 nm process technology. Socket: UTFCBGA1380. Thermal design power (TDP): 8 Watt. Memory support: DDR3. Passmark benchmark score: 1,189 points. Launch price was $37.
Pentium 3805U
The Pentium 3805U is manufactured by Intel. It was released in 1 March 2015 (10 years ago). It is based on the Broadwell-U (2015) 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 14 nm process technology. Socket: FCBGA1168. Thermal design power (TDP): 15 Watt. Memory support: DDR3. Passmark benchmark score: 1,196 points. Launch price was $161.
Processing Power
The Atom Z3770 packs 4 cores / 4 threads, while the Pentium 3805U offers 2 cores / 2 threads — the Atom Z3770 has 2 more cores. Boost clocks reach 2.39 GHz on the Atom Z3770 versus 1.9 GHz on the Pentium 3805U — a 22.8% clock advantage for the Atom Z3770 (base: 1.46 GHz vs 1.9 GHz). The Atom Z3770 uses the Bay Trail-T (2013−2014) architecture (22 nm), while the Pentium 3805U uses Broadwell-U (2015) (14 nm). In PassMark, the Atom Z3770 scores 1,189 against the Pentium 3805U's 1,196 — a 0.6% lead for the Pentium 3805U. L3 cache: 0 kB on the Atom Z3770 vs 2 MB (total) on the Pentium 3805U.
| Feature | Atom Z3770 | Pentium 3805U |
|---|---|---|
| Cores / Threads | 4 / 4+100% | 2 / 2 |
| Boost Clock | 2.39 GHz+26% | 1.9 GHz |
| Base Clock | 1.46 GHz | 1.9 GHz+30% |
| L3 Cache | 0 kB | 2 MB (total) |
| L2 Cache | 512K (per core)+100% | 256K (per core) |
| Process | 22 nm | 14 nm-36% |
| Architecture | Bay Trail-T (2013−2014) | Broadwell-U (2015) |
| PassMark | 1,189 | 1,196 |
Memory & Platform
The Atom Z3770 uses the UTFCBGA1380 socket (PCIe 2.0), while the Pentium 3805U uses FCBGA1168 (PCIe 3.0) — making them incompatible on the same motherboard. Both support up to LPDDR3-1066 memory speed. The Pentium 3805U 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 (Atom Z3770) vs 12 (Pentium 3805U) — the Pentium 3805U offers 12 more lanes for additional GPUs or NVMe drives.
| Feature | Atom Z3770 | Pentium 3805U |
|---|---|---|
| Socket | UTFCBGA1380 | FCBGA1168 |
| PCIe Generation | PCIe 2.0 | PCIe 3.0+50% |
| Max RAM Speed | LPDDR3-1066 | DDR3L-1600 |
| Max RAM Capacity | 4 GB | 16 GB+300% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 0 | 12 |
Advanced Features
Virtualization: not specified (Atom Z3770) / VT-x, VT-d (Pentium 3805U). Both include integrated graphics — Intel HD Graphics (Bay Trail) (Atom Z3770) and HD Graphics (Broadwell) (Pentium 3805U) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Pentium 3805U targets Mobile.
| Feature | Atom Z3770 | Pentium 3805U |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | Intel HD Graphics (Bay Trail) | HD Graphics (Broadwell) |
| Unlocked | — | No |
| AVX-512 | — | No |
| Virtualization | — | VT-x, VT-d |
| Target Use | — | Mobile |
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