A8-3870K vs Core i5-2540M

A8-3870K vs Core i5-2540M Performance Spectrum

A8-3870K

4 / 4

2,360

+0.2%

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Core i5-2540M

2 / 4

2,356

0.0%

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.

A8-3870K vs Core i5-2540M 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.

A8-3870K vs Core i5-2540M: Pros, Cons & Final Verdict

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

A8-3870K

2011

Why buy it

✅+0.2% higher PassMark.
✅25% more PCIe lanes (20 vs 16) for storage and expansion-heavy builds.
✅Includes a boxed cooler (Yes), unlike Core i5-2540M.

Trade-offs

❌185.7% higher power demand at 100W vs 35W.

Core i5-2540M

2011

Why buy it

✅Draws 35W instead of 100W, a 65W reduction.

Trade-offs

❌Lower PassMark (2,356 vs 2,360).
❌Launch MSRP is still $266 MSRP, while A8-3870K mostly shows up through inconsistent older-market listings.
❌No boxed cooler included, unlike A8-3870K.

Quick Answers

So, is Core i5-2540M better than A8-3870K?

It depends on what you want from the system. For gaming, Core i5-2540M 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, A8-3870K pulls ahead with 0.2% better PassMark.

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

For streaming, content creation, and heavier multitasking, A8-3870K is the stronger fit. You are getting 0.2% better PassMark, backed by 4 cores and 4 threads.

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

Core i5-2540M is the better buy right now. Core i5-2540M comes in at an unclear MSRP at $266 MSRP versus unclear MSRP, and it still gives you a 1.5% average FPS lead across 50 shared CPU game tests in our data. The compromise is that A8-3870K is still stronger for heavier multi-core work with 0.2% better PassMark. It is also 100.0% better value on MSRP (8.9 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

A8-3870K makes more sense long term for 2026 and beyond. You are getting more multi-core headroom with 4 cores / 4 threads instead of 2/4. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

A8-3870K vs Core i5-2540M Technical Specifications

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

A8-3870K

The A8-3870K is manufactured by AMD. It was released in 2014-01-01. It is based on the Llano (2011−2012) architecture. It features 4 cores and 4 threads. Base frequency is 3 GHz, with boost up to 3 GHz. L3 cache: 0 kB. L2 cache: 1 MB (per core). Built on 32 nm process technology. Socket: FM1. Thermal design power (TDP): 100 Watt. Memory support: DDR3. Passmark benchmark score: 2,360 points. Launch price was $90.

Core i5-2540M

The Core i5-2540M is manufactured by Intel. It was released in 1 February 2011 (14 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 2 cores and 4 threads. Base frequency is 2.6 GHz, with boost up to 3.3 GHz. L3 cache: 3 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: 2,356 points. Launch price was $266.

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Processing Power

The A8-3870K packs 4 cores / 4 threads, while the Core i5-2540M offers 2 cores / 4 threads — the A8-3870K has 2 more cores. Boost clocks reach 3 GHz on the A8-3870K versus 3.3 GHz on the Core i5-2540M — a 9.5% clock advantage for the Core i5-2540M (base: 3 GHz vs 2.6 GHz). The A8-3870K uses the Llano (2011−2012) architecture (32 nm), while the Core i5-2540M uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the A8-3870K scores 2,360 against the Core i5-2540M's 2,356 — a 0.2% lead for the A8-3870K. L3 cache: 0 kB on the A8-3870K vs 3 MB (total) on the Core i5-2540M.

Feature	A8-3870K	Core i5-2540M
Cores / Threads	4 / 4+100%	2 / 4
Boost Clock	3 GHz	3.3 GHz+10%
Base Clock	3 GHz+15%	2.6 GHz
L3 Cache	0 kB	3 MB (total)
L2 Cache	1 MB (per core)	256K (per core)+25500%
Process	32 nm	32 nm
Architecture	Llano (2011−2012)	Sandy Bridge (2011−2013)
PassMark	2,360	2,356
Geekbench 6 Single	380	—

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Memory & Platform

The A8-3870K uses the FM1 socket (PCIe 2.0), while the Core i5-2540M uses PGA988 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1866 on the A8-3870K versus 1333 on the Core i5-2540M — the A8-3870K supports 40% faster memory, which can translate to measurable gains in memory-sensitive workloads. The A8-3870K supports up to 32 GB of RAM compared to 16 GB — 100% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 20 (A8-3870K) vs 16 (Core i5-2540M) — the A8-3870K offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: A55,A75 (A8-3870K) and HM65,HM67,QM67,QS67 (Core i5-2540M).

Feature	A8-3870K	Core i5-2540M
Socket	FM1	PGA988
PCIe Generation	PCIe 2.0	PCIe 2.0
Max RAM Speed	DDR3-1866+40%	1333
Max RAM Capacity	32 GB+100%	16 GB
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	20+25%	16

🔧

Advanced Features

Only the A8-3870K has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: AMD-V (A8-3870K) vs true (Core i5-2540M). Both include integrated graphics — Radeon HD 6550D (A8-3870K) and Intel HD Graphics 3000 (Core i5-2540M) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: A8-3870K targets Budget Gaming Desktop. Direct competitor: A8-3870K rivals Core i3-2125; Core i5-2540M rivals Phenom II Black Edition N660.