Athlon II X4 635 vs Core i5-2520M

Athlon II X4 635 vs Core i5-2520M Performance Spectrum

Athlon II X4 635

4 / 4

2,248

+0.3%

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Core i5-2520M

2 / 4

2,241

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 635 vs Core i5-2520M 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 635 vs Core i5-2520M: 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 635

2010

Why buy it

✅+0.3% higher PassMark.
✅Includes a boxed cooler (Yes), unlike Core i5-2520M.

Trade-offs

❌Lower PassMark per dollar, at 5.6 vs 10.0 PassMark/$ ($400 MSRP vs $225 MSRP).
❌171.4% higher power demand at 95W vs 35W.
❌No integrated graphics, while Core i5-2520M can still boot and troubleshoot without a discrete GPU.

Core i5-2520M

2011

Why buy it

✅Costs $175 less on MSRP ($225 MSRP vs $400 MSRP).
✅Delivers 77.2% more PassMark for each dollar spent, at 10.0 vs 5.6 PassMark/$ ($225 MSRP vs $400 MSRP).
✅Draws 35W instead of 95W, a 60W reduction.
✅Integrated graphics onboard with Intel HD Graphics 3000, while Athlon II X4 635 needs a discrete GPU.

Trade-offs

❌Lower PassMark (2,241 vs 2,248).
❌No boxed cooler included, unlike Athlon II X4 635.

Quick Answers

So, is Core i5-2520M better than Athlon II X4 635?

It depends on what you want from the system. For gaming, Core i5-2520M is ahead with a 2.3% average FPS lead across 48 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Athlon II X4 635 pulls ahead with 0.3% better PassMark.

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

For streaming, content creation, and heavier multitasking, Athlon II X4 635 is the stronger fit. You are getting 0.3% better PassMark, backed by 4 cores and 4 threads.

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

Core i5-2520M is the better buy right now. Core i5-2520M comes in $175 cheaper on MSRP at $225 MSRP versus $400 MSRP, and it still gives you a 2.3% average FPS lead across 48 shared CPU game tests in our data. The compromise is that Athlon II X4 635 is still stronger for heavier multi-core work with 0.3% better PassMark. It is also 77.2% better value on MSRP (10.0 vs 5.6 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Core i5-2520M 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 635 vs Core i5-2520M Technical Specifications

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

Athlon II X4 635

The Athlon II X4 635 is manufactured by AMD. It was released in 25 January 2010 (15 years ago). It is based on the Propus (2009−2011) architecture. It features 4 cores and 4 threads. Base frequency is 2.9 GHz, with boost up to 2.9 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: 2,248 points. Launch price was $70.

Core i5-2520M

The Core i5-2520M 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 2.5 GHz, with boost up to 3.2 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: 2,241 points. Launch price was $225.

⚡

Processing Power

The Athlon II X4 635 packs 4 cores / 4 threads, while the Core i5-2520M offers 2 cores / 4 threads — the Athlon II X4 635 has 2 more cores. Boost clocks reach 2.9 GHz on the Athlon II X4 635 versus 3.2 GHz on the Core i5-2520M — a 9.8% clock advantage for the Core i5-2520M (base: 2.9 GHz vs 2.5 GHz). The Athlon II X4 635 uses the Propus (2009−2011) architecture (45 nm), while the Core i5-2520M uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Athlon II X4 635 scores 2,248 against the Core i5-2520M's 2,241 — a 0.3% lead for the Athlon II X4 635. L3 cache: 0 kB on the Athlon II X4 635 vs 3 MB (total) on the Core i5-2520M.

Feature	Athlon II X4 635	Core i5-2520M
Cores / Threads	4 / 4+100%	2 / 4
Boost Clock	2.9 GHz	3.2 GHz+10%
Base Clock	2.9 GHz+16%	2.5 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	2,248	2,241
Cinebench R23 Multi	658	—
Geekbench 6 Single	180	—
Geekbench 6 Multi	550	—

🧠

Memory & Platform

The Athlon II X4 635 uses the AM3 socket (PCIe 2.0), while the Core i5-2520M uses PGA988 (PCIe 2.0) — making them incompatible on the same motherboard. Both support up to DDR3-1333 / DDR2-1066 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 770,785G,790FX,880G,890FX,970,990FX (Athlon II X4 635) and HM65,HM67,QM67,QS67 (Core i5-2520M).

Feature	Athlon II X4 635	Core i5-2520M
Socket	AM3	PGA988
PCIe Generation	PCIe 2.0	PCIe 2.0
Max RAM Speed	DDR3-1333 / DDR2-1066	1333
Max RAM Capacity	16 GB	16 GB
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	16	16

🔧

Advanced Features

Only the Athlon II X4 635 has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: AMD-V (Athlon II X4 635) vs true (Core i5-2520M). The Core i5-2520M includes integrated graphics (Intel HD Graphics 3000), while the Athlon II X4 635 requires a dedicated GPU. Primary use case: Athlon II X4 635 targets Budget. Direct competitor: Core i5-2520M rivals Phenom II Black Edition N660.

Feature	Athlon II X4 635	Core i5-2520M
Integrated GPU	No	Yes
IGPU Model	—	Intel HD Graphics 3000
Unlocked	Yes	No
AVX-512	No	No
Virtualization	AMD-V	true
Target Use	Budget	—

💰

Value Analysis

At launch, the Athlon II X4 635 was priced at $400, while the Core i5-2520M came in at $225. On launch pricing ($400 vs $225), Core i5-2520M was $175 cheaper. In terms of value on MSRP (PassMark points per dollar), the Athlon II X4 635 delivers 5.6 pts/$ vs 10.0 pts/$ for the Core i5-2520M — making the Core i5-2520M the 55.7% better value option.

Feature	Athlon II X4 635	Core i5-2520M
MSRP	$400	$225-44%
Performance per Dollar	5.6	10.0+79%
Release Date	2010	2011

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