Athlon II X4 645 vs Core i5-2540M

Athlon II X4 645 vs Core i5-2540M Performance Spectrum

Athlon II X4 645

4 / 4

2,375

+0.8%

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.

Athlon II X4 645 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.

Athlon II X4 645 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.

Athlon II X4 645

2010

Why buy it

✅+0.8% higher PassMark.
✅Costs $140 less on MSRP ($126 MSRP vs $266 MSRP).
✅Delivers 112.8% more PassMark for each dollar spent, at 18.8 vs 8.9 PassMark/$ ($126 MSRP vs $266 MSRP).
✅Includes a boxed cooler (Yes), unlike Core i5-2540M.

Trade-offs

❌171.4% higher power demand at 95W vs 35W.
❌No integrated graphics, while Core i5-2540M can still boot and troubleshoot without a discrete GPU.

Core i5-2540M

2011

Why buy it

✅Draws 35W instead of 95W, a 60W reduction.
✅Integrated graphics onboard with Intel HD Graphics 3000, while Athlon II X4 645 needs a discrete GPU.

Trade-offs

❌Lower PassMark (2,356 vs 2,375).
❌Lower PassMark per dollar, at 8.9 vs 18.8 PassMark/$ ($266 MSRP vs $126 MSRP).
❌No boxed cooler included, unlike Athlon II X4 645.

Quick Answers

So, is Core i5-2540M better than Athlon II X4 645?

It depends on what you want from the system. For gaming, Core i5-2540M is ahead with a 2.4% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Athlon II X4 645 pulls ahead with 0.8% better PassMark.

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

For streaming, content creation, and heavier multitasking, Athlon II X4 645 is the stronger fit. You are getting 0.8% 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 still the much better call for a fresh build. Core i5-2540M comes in 111.1% more expensive on MSRP at $266 MSRP versus $126 MSRP, and it still gives you a 2.4% average FPS lead across 50 shared CPU game tests in our data. Athlon II X4 645 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2010 platform. Even with 112.8% better value on paper (18.8 vs 8.9 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on AM3.

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

Core i5-2540M makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2011 vs 2010). That makes it the safer long-term bet.

Athlon II X4 645 vs Core i5-2540M Technical Specifications

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

Athlon II X4 645

The Athlon II X4 645 is manufactured by AMD. It was released in 21 September 2010 (15 years ago). It is based on the Propus (2009−2011) architecture. It features 4 cores and 4 threads. Base frequency is 3.1 GHz, with boost up to 3.1 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 2,375 points. Launch price was $80.

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.

⚡

Processing Power

The Athlon II X4 645 packs 4 cores / 4 threads, while the Core i5-2540M offers 2 cores / 4 threads — the Athlon II X4 645 has 2 more cores. Boost clocks reach 3.1 GHz on the Athlon II X4 645 versus 3.3 GHz on the Core i5-2540M — a 6.2% clock advantage for the Core i5-2540M (base: 3.1 GHz vs 2.6 GHz). The Athlon II X4 645 uses the Propus (2009−2011) architecture (45 nm), while the Core i5-2540M uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Athlon II X4 645 scores 2,375 against the Core i5-2540M's 2,356 — a 0.8% lead for the Athlon II X4 645. L3 cache: 0 kB on the Athlon II X4 645 vs 3 MB (total) on the Core i5-2540M.

Feature	Athlon II X4 645	Core i5-2540M
Cores / Threads	4 / 4+100%	2 / 4
Boost Clock	3.1 GHz	3.3 GHz+6%
Base Clock	3.1 GHz+19%	2.6 GHz
L3 Cache	0 kB	3 MB (total)
L2 Cache	512 kB (per core)+100%	256K (per core)
Process	45 nm	32 nm-29%
Architecture	Propus (2009−2011)	Sandy Bridge (2011−2013)
PassMark	2,375	2,356
Cinebench R23 Multi	1,374	—
Geekbench 6 Single	399	—
Geekbench 6 Multi	1,374	—

🧠

Memory & Platform

The Athlon II X4 645 uses the AM3 socket (PCIe 2.0), while the Core i5-2540M uses PGA988 (PCIe 2.0) — making them incompatible on the same motherboard. Both support up to DDR3-1333 memory speed. Both support up to 16 GB of RAM. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes. Chipset compatibility: AMD 700 Series,AMD 800 Series,AMD 900 Series (Athlon II X4 645) and HM65,HM67,QM67,QS67 (Core i5-2540M).

Feature	Athlon II X4 645	Core i5-2540M
Socket	AM3	PGA988
PCIe Generation	PCIe 2.0	PCIe 2.0
Max RAM Speed	DDR3-1333	1333
Max RAM Capacity	16 GB	16 GB
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	16	16

🔧

Advanced Features

Virtualization support: Yes (Athlon II X4 645) vs true (Core i5-2540M). The Core i5-2540M includes integrated graphics (Intel HD Graphics 3000), while the Athlon II X4 645 requires a dedicated GPU. Primary use case: Athlon II X4 645 targets Desktop. Direct competitor: Core i5-2540M rivals Phenom II Black Edition N660.

Feature	Athlon II X4 645	Core i5-2540M
Integrated GPU	No	Yes
IGPU Model	—	Intel HD Graphics 3000
Unlocked	—	No
AVX-512	No	No
Virtualization	Yes	true
Target Use	Desktop	—

💰

Value Analysis

At launch, the Athlon II X4 645 was priced at $126, while the Core i5-2540M came in at $266. On launch pricing ($126 vs $266), Athlon II X4 645 was $140 cheaper. In terms of value on MSRP (PassMark points per dollar), the Athlon II X4 645 delivers 18.8 pts/$ vs 8.9 pts/$ for the Core i5-2540M — making the Athlon II X4 645 the 72.1% better value option.

Feature	Athlon II X4 645	Core i5-2540M
MSRP	$126-53%	$266
Performance per Dollar	18.8+111%	8.9
Release Date	2010	2011

Search Athlon II X4 645 on Amazon

Search Core i5-2540M on Amazon

Affiliate Disclosure

ChipVERSUS is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. We may earn a commission on qualifying purchases made through our links. This comes at no additional cost to you and helps support our work in providing comprehensive PC building guides and tools.

Amazon and the Amazon logo are trademarks of Amazon.com, Inc. or its affiliates.