Atom Z3770 vs Pentium 3805U

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.

Atom Z3770 vs Pentium 3805U FPS Benchmarks

Predicted gaming performance across popular games. Tested paired with GeForce RTX 5090 to isolate CPU performance.

Search any supported game below to compare 1080p FPS for both components.

Atom Z3770 vs Pentium 3805U: Pros, Cons & Final Verdict

See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.

Atom Z3770

2013

Why buy it

✅Draws 8W instead of 512W, a 504W reduction.

Trade-offs

❌Lower PassMark (1,189 vs 1,196).

Pentium 3805U

2015

Why buy it

✅+0.6% higher PassMark.
✅100+% more PCIe lanes (12 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌6300% higher power demand at 512W vs 8W.

Quick Answers

So, is Pentium 3805U better than Atom Z3770?

It depends on what you want from the system. For gaming, Atom Z3770 is ahead with a 1.5% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Pentium 3805U pulls ahead with 0.6% better PassMark.

Which one is better for streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, Pentium 3805U is the stronger fit. You are getting 0.6% better PassMark, backed by 2 cores and 2 threads.

Which one is the smarter buy today, not just the cheaper CPU?

Pentium 3805U still makes the most sense overall. Pentium 3805U comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you 0.6% better PassMark.

Which one is more future-proof for 2026 and beyond?

Pentium 3805U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2015 vs 2013) and more multi-core headroom with 2 cores / 2 threads instead of 4/4. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Atom Z3770 vs Pentium 3805U Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

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.

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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

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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. Maximum memory speed reaches LPDDR3-1066 on the Atom Z3770 versus DDR3L-1600 on the Pentium 3805U — the Pentium 3805U supports 50.1% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Pentium 3805U supports up to 16 GB of RAM compared to 4 GB — 300% 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+50%
Max RAM Capacity	4 GB	16 GB+300%
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	0	12

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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