Athlon II X4 640 vs Xeon L5520

Athlon II X4 640 vs Xeon L5520 Performance Spectrum

Athlon II X4 640

4 / 4

2,266

0.0%

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Xeon L5520

4 / 8

2,274

+0.4%

Celeron 847

Core i3-530

Pentium Dual Core T2390

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 640 vs Xeon L5520 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 640 vs Xeon L5520: 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 640

2010

Why buy it

✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Includes a boxed cooler (Yes), unlike Xeon L5520.

Trade-offs

❌Lower PassMark (2,266 vs 2,274).
❌Less compelling for workstation-style loads than Xeon L5520, which brings 4 cores / 8 threads.
❌Launch MSRP is still $80 MSRP, while Xeon L5520 mostly shows up through inconsistent older-market listings.
❌58.3% higher power demand at 95W vs 60W.

Xeon L5520

2009

Why buy it

✅+0.4% higher PassMark.
✅Better for workstations and heavier parallel workloads: 4 cores / 8 threads.
✅Draws 60W instead of 95W, a 35W reduction.

Trade-offs

❌No boxed cooler included, unlike Athlon II X4 640.

Quick Answers

So, is Athlon II X4 640 better than Xeon L5520?

Not really, because they are built for different jobs. Xeon L5520 makes more sense for workstation-style multi-core throughput, while Athlon II X4 640 is the more practical desktop choice for gaming, platform cost, and everyday use.

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

For streaming, content creation, and heavier multitasking, Xeon L5520 is the stronger fit. You are getting 0.4% better PassMark, backed by 4 cores and 8 threads.

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

Athlon II X4 640 is the better buy right now. Athlon II X4 640 comes in at an unclear MSRP at $80 MSRP versus unclear MSRP, and it still gives you a 2.6% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Xeon L5520 is still stronger for heavier multi-core work with 0.4% better PassMark. It is also 100.0% better value on MSRP (28.3 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Athlon II X4 640 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2010 vs 2009). That makes it the safer long-term bet.

Athlon II X4 640 vs Xeon L5520 Technical Specifications

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

Athlon II X4 640

The Athlon II X4 640 is manufactured by AMD. It was released in 11 May 2010 (15 years ago). It is based on the Propus (2009−2011) 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: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 2,266 points. Launch price was $80.

Xeon L5520

The Xeon L5520 is manufactured by Intel. It was released in 30 March 2009 (16 years ago). It is based on the Gainestown (2009−2010) architecture. It features 4 cores and 8 threads. Base frequency is 2.26 GHz, with boost up to 2.48 GHz. L3 cache: 8 MB (total). L2 cache: 256 kB (per core). Built on 45 nm process technology. Socket: LGA1366. Thermal design power (TDP): 60 Watt. Memory support: DDR3. Passmark benchmark score: 2,274 points. Launch price was $100.

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Processing Power

The Athlon II X4 640 packs 4 cores / 4 threads, matching the Xeon L5520's 4 cores. Boost clocks reach 3 GHz on the Athlon II X4 640 versus 2.48 GHz on the Xeon L5520 — a 19% clock advantage for the Athlon II X4 640 (base: 3 GHz vs 2.26 GHz). The Athlon II X4 640 uses the Propus (2009−2011) architecture (45 nm), while the Xeon L5520 uses Gainestown (2009−2010) (45 nm). In PassMark, the Athlon II X4 640 scores 2,266 against the Xeon L5520's 2,274 — a 0.4% lead for the Xeon L5520. L3 cache: 0 kB on the Athlon II X4 640 vs 8 MB (total) on the Xeon L5520.

Feature	Athlon II X4 640	Xeon L5520
Cores / Threads	4 / 4	4 / 8
Boost Clock	3 GHz+21%	2.48 GHz
Base Clock	3 GHz+33%	2.26 GHz
L3 Cache	0 kB	8 MB (total)
L2 Cache	512 kB (per core)+100%	256 kB (per core)
Process	45 nm	45 nm
Architecture	Propus (2009−2011)	Gainestown (2009−2010)
PassMark	2,266	2,274
Cinebench R23 Multi	1,471	—
Geekbench 6 Single	386	—
Geekbench 6 Multi	1,332	—

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Memory & Platform

The Athlon II X4 640 uses the AM3 socket (PCIe 2.0), while the Xeon L5520 uses LGA1366 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Athlon II X4 640	Xeon L5520
Socket	AM3	LGA1366
PCIe Generation	PCIe 2.0	PCIe 2.0
Max RAM Speed	DDR3-1333	—
Max RAM Capacity	16 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	16	—

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Advanced Features

Virtualization: AMD-V (Athlon II X4 640) / not specified (Xeon L5520). Primary use case: Athlon II X4 640 targets Budget. Direct competitor: Athlon II X4 640 rivals Core 2 Quad Q8300.