CPU
GPU
Pentium 3805U
Atom Z3770
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 Pentium 3805U is positioned at rank 344 and the Atom Z3770 is on rank 702, 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 Pentium 3805U
Performance Per Dollar Atom Z3770
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Pentium 3805U | Atom Z3770 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | 🛑 Legacy (Broadwell-U (2015) / 14 nm) | 🛑 Legacy (Bay Trail-T (2013−2014) / 22 nm) |
💎 Value Proposition
| Insight | Pentium 3805U | Atom Z3770 |
|---|---|---|
| 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 Pentium 3805U and Atom Z3770
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.
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.
Processing Power
The Pentium 3805U packs 2 cores / 2 threads, while the Atom Z3770 offers 4 cores / 4 threads — the Atom Z3770 has 2 more cores. Boost clocks reach 1.9 GHz on the Pentium 3805U versus 2.39 GHz on the Atom Z3770 — a 22.8% clock advantage for the Atom Z3770 (base: 1.9 GHz vs 1.46 GHz). The Pentium 3805U uses the Broadwell-U (2015) architecture (14 nm), while the Atom Z3770 uses Bay Trail-T (2013−2014) (22 nm). In PassMark, the Pentium 3805U scores 1,196 against the Atom Z3770's 1,189 — a 0.6% lead for the Pentium 3805U. L3 cache: 2 MB (total) on the Pentium 3805U vs 0 kB on the Atom Z3770.
| Feature | Pentium 3805U | Atom Z3770 |
|---|---|---|
| Cores / Threads | 2 / 2 | 4 / 4+100% |
| Boost Clock | 1.9 GHz | 2.39 GHz+26% |
| Base Clock | 1.9 GHz+30% | 1.46 GHz |
| L3 Cache | 2 MB (total) | 0 kB |
| L2 Cache | 256K (per core) | 512K (per core)+100% |
| Process | 14 nm-36% | 22 nm |
| Architecture | Broadwell-U (2015) | Bay Trail-T (2013−2014) |
| PassMark | 1,196 | 1,189 |
Memory & Platform
The Pentium 3805U uses the FCBGA1168 socket (PCIe 3.0), while the Atom Z3770 uses UTFCBGA1380 (PCIe 2.0) — making them incompatible on the same motherboard. Both support up to DDR3L-1600 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: 12 (Pentium 3805U) vs 0 (Atom Z3770) — the Pentium 3805U offers 12 more lanes for additional GPUs or NVMe drives.
| Feature | Pentium 3805U | Atom Z3770 |
|---|---|---|
| Socket | FCBGA1168 | UTFCBGA1380 |
| PCIe Generation | PCIe 3.0+50% | PCIe 2.0 |
| Max RAM Speed | DDR3L-1600 | LPDDR3-1066 |
| Max RAM Capacity | 16 GB+300% | 4 GB |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 12 | 0 |
Advanced Features
Virtualization: VT-x, VT-d (Pentium 3805U) / not specified (Atom Z3770). Both include integrated graphics — HD Graphics (Broadwell) (Pentium 3805U) and Intel HD Graphics (Bay Trail) (Atom Z3770) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Pentium 3805U targets Mobile.
| Feature | Pentium 3805U | Atom Z3770 |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | HD Graphics (Broadwell) | Intel HD Graphics (Bay Trail) |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | VT-x, VT-d | — |
| Target Use | Mobile | — |
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