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 C3858 vs Core i5-5575R 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 C3858 vs Core i5-5575R: Pros, Cons & Final Verdict

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

Atom C3858

2017

Why buy it

✅Better for gaming: +20.2% higher average FPS across 50 shared CPU benchmark tests.
✅+200% larger total L3 cache (12 MB vs 4 MB).
✅Draws 25W instead of 65W, a 40W reduction.

Trade-offs

❌Lower PassMark (5,040 vs 5,074).
❌No integrated graphics, while Core i5-5575R can still boot and troubleshoot without a discrete GPU.

Core i5-5575R

2015

Why buy it

✅+0.7% higher PassMark.
✅33.3% more PCIe lanes (16 vs 12) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Iris Pro Graphics 6200, while Atom C3858 needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Atom C3858 across 50 shared CPU benchmark tests.
❌Smaller total L3 cache (4 MB vs 12 MB).
❌Launch MSRP is still $265 MSRP, while Atom C3858 mostly shows up through inconsistent older-market listings.
❌160% higher power demand at 65W vs 25W.

Quick Answers

So, is Atom C3858 better than Core i5-5575R?

It depends on what you want from the system. For gaming, Atom C3858 is ahead with a 20.2% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core i5-5575R pulls ahead with 0.7% better PassMark. Atom C3858 also has the bigger cache pool with 200% larger total L3 cache (12 MB vs 4 MB).

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

For streaming, content creation, and heavier multitasking, Core i5-5575R is the stronger fit. You are getting 0.7% better PassMark, backed by 4 cores and 4 threads.

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

Atom C3858 is the easy recommendation for a fresh desktop build. Atom C3858 comes in at an unclear MSRP at unclear MSRP versus $265 MSRP, and it still gives you a 20.2% average FPS lead across 50 shared CPU game tests in our data. Core i5-5575R only looks good on raw value math because it is a cheap legacy laptop chip, not because it is a real desktop gaming recommendation. It simply does not keep up in modern games, especially when the gap is already 20.2% in the shared gaming data.

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

Atom C3858 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2017 vs 2015) and 200% larger total L3 cache (12 MB vs 4 MB). That makes it the safer long-term bet.

Atom C3858 vs Core i5-5575R Technical Specifications

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

Atom C3858

The Atom C3858 is manufactured by Intel. It was released in 15 August 2017 (8 years ago). It is based on the Goldmont (2016−2017) architecture. It features 12 cores and 12 threads. Base frequency is 2 GHz, with boost up to 2 GHz. L3 cache: 12 MB. L2 cache: 12 MB. Built on 14 nm process technology. Socket: FCBGA1310. Thermal design power (TDP): 25 Watt. Memory support: DDR4: 2400. Passmark benchmark score: 5,040 points. Launch price was $332.

Core i5-5575R

The Core i5-5575R is manufactured by Intel. It was released in 15 May 2015 (10 years ago). It is based on the Broadwell (2015−2019) architecture. It features 4 cores and 4 threads. Base frequency is 2.8 GHz, with boost up to 3.3 GHz. L3 cache: 4 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: BGA1364. Thermal design power (TDP): 65 Watt. Memory support: DDR3L-1333, DDR3L-1600, DDR3L-1866. Passmark benchmark score: 5,074 points. Launch price was $149.

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Processing Power

The Atom C3858 packs 12 cores / 12 threads, while the Core i5-5575R offers 4 cores / 4 threads — the Atom C3858 has 8 more cores. Boost clocks reach 2 GHz on the Atom C3858 versus 3.3 GHz on the Core i5-5575R — a 49.1% clock advantage for the Core i5-5575R (base: 2 GHz vs 2.8 GHz). The Atom C3858 uses the Goldmont (2016−2017) architecture (14 nm), while the Core i5-5575R uses Broadwell (2015−2019) (14 nm). In PassMark, the Atom C3858 scores 5,040 against the Core i5-5575R's 5,074 — a 0.7% lead for the Core i5-5575R. L3 cache: 12 MB on the Atom C3858 vs 4 MB (total) on the Core i5-5575R.

Feature	Atom C3858	Core i5-5575R
Cores / Threads	12 / 12+200%	4 / 4
Boost Clock	2 GHz	3.3 GHz+65%
Base Clock	2 GHz	2.8 GHz+40%
L3 Cache	12 MB+200%	4 MB (total)
L2 Cache	12 MB	256K (per core)+2033%
Process	14 nm	14 nm
Architecture	Goldmont (2016−2017)	Broadwell (2015−2019)
PassMark	5,040	5,074
Geekbench 6 Single	—	1,081

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Memory & Platform

The Atom C3858 uses the FCBGA1310 socket (PCIe 3.0), while the Core i5-5575R uses BGA1364 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2400 on the Atom C3858 versus DDR3L-1866 on the Core i5-5575R — the Atom C3858 supports 28.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Atom C3858 supports up to 256 GB of RAM compared to 32 GB — 700% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 12 (Atom C3858) vs 16 (Core i5-5575R) — the Core i5-5575R offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel FCBGA1310 (Atom C3858) and HM87,QM87,Z97,H97 (Core i5-5575R).

Feature	Atom C3858	Core i5-5575R
Socket	FCBGA1310	BGA1364
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR4-2400+29%	DDR3L-1866
Max RAM Capacity	256 GB+700%	32 GB
RAM Channels	2	2
ECC Support	Yes	No
PCIe Lanes	12	16+33%

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Advanced Features

Virtualization: not specified (Atom C3858) / VT-x, VT-d, EPT (Core i5-5575R). The Core i5-5575R includes integrated graphics (Iris Pro Graphics 6200), while the Atom C3858 requires a dedicated GPU. Primary use case: Core i5-5575R targets All-in-One Desktop. Direct competitor: Core i5-5575R rivals A10-7870K.