Athlon X4 840 vs Xeon L5609

Athlon X4 840 vs Xeon L5609 Performance Spectrum

Athlon X4 840

4 / 4

3,331

+1.0%

Ryzen Threadripper 3990X

Xeon L5609

4 / 4

3,298

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 X4 840 vs Xeon L5609 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 X4 840 vs Xeon L5609: Pros, Cons & Final Verdict

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

Athlon X4 840

2014

Why buy it

✅Better for gaming: +6.8% higher average FPS across 50 shared CPU benchmark tests.
✅Costs $127 less on MSRP ($102 MSRP vs $229 MSRP).
✅Delivers 126.8% more PassMark for each dollar spent, at 32.7 vs 14.4 PassMark/$ ($102 MSRP vs $229 MSRP).
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌62.5% higher power demand at 65W vs 40W.

Xeon L5609

2010

Why buy it

✅Draws 40W instead of 65W, a 25W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Athlon X4 840 across 50 shared CPU benchmark tests.
❌Lower PassMark (3,298 vs 3,331).
❌Lower PassMark per dollar, at 14.4 vs 32.7 PassMark/$ ($229 MSRP vs $102 MSRP).

Quick Answers

So, is Athlon X4 840 better than Xeon L5609?

Not really, because they are built for different jobs. Xeon L5609 makes more sense for workstation-style multi-core throughput, while Athlon X4 840 is the more practical desktop choice for gaming, platform cost, and everyday use.

Which one is better for gaming?

If gaming is the priority, Athlon X4 840 is the better pick. According to our tests, it delivers 6.8% more average FPS across 50 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Athlon X4 840 is the stronger fit. You are getting 1% better PassMark, backed by 4 cores and 4 threads.

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

Athlon X4 840 is the better buy right now. Athlon X4 840 comes in $127 cheaper on MSRP at $102 MSRP versus $229 MSRP, and it still gives you a 6.8% average FPS lead across 50 shared CPU game tests in our data. It is also 126.8% better value on MSRP (32.7 vs 14.4 PassMark/$), 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 X4 840 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2014 vs 2010) and more multi-core headroom with 4 cores / 4 threads instead of 4/4. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Athlon X4 840 vs Xeon L5609 Technical Specifications

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

Athlon X4 840

The Athlon X4 840 is manufactured by AMD. It was released in 2009-01-01. It is based on the Kaveri (2014−2015) architecture. It features 4 cores and 4 threads. Base frequency is 3.1 GHz, with boost up to 3.8 GHz. L2 cache: 4 MB. Built on 28 nm process technology. Socket: FM2+. Thermal design power (TDP): 65 watt. Memory support: DDR3. Passmark benchmark score: 3,331 points. Launch price was $149.

Xeon L5609

The Xeon L5609 is manufactured by Intel. It was released in 2015-01-01. It is based on the Westmere-EP (2010−2011) architecture. It features 4 cores and 4 threads. Base frequency is 1.86 GHz, with boost up to 1.86 GHz. L3 cache: 12 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1366. Thermal design power (TDP): 40 Watt. Memory support: DDR3. Passmark benchmark score: 3,298 points. Launch price was $800.

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Processing Power

Both the Athlon X4 840 and Xeon L5609 share an identical 4-core/4-thread configuration. Boost clocks reach 3.8 GHz on the Athlon X4 840 versus 1.86 GHz on the Xeon L5609 — a 68.6% clock advantage for the Athlon X4 840 (base: 3.1 GHz vs 1.86 GHz). The Athlon X4 840 uses the Kaveri (2014−2015) architecture (28 nm), while the Xeon L5609 uses Westmere-EP (2010−2011) (32 nm). In PassMark, the Athlon X4 840 scores 3,331 against the Xeon L5609's 3,298 — a 1% lead for the Athlon X4 840.

Feature	Athlon X4 840	Xeon L5609
Cores / Threads	4 / 4	4 / 4
Boost Clock	3.8 GHz+104%	1.86 GHz
Base Clock	3.1 GHz+67%	1.86 GHz
L3 Cache	—	12 MB (total)
L2 Cache	4 MB+1500%	256 kB (per core)
Process	28 nm-13%	32 nm
Architecture	Kaveri (2014−2015)	Westmere-EP (2010−2011)
PassMark	3,331+1%	3,298

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Memory & Platform

The Athlon X4 840 uses the FM2+ socket (PCIe 3.0), while the Xeon L5609 uses LGA1366 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Athlon X4 840	Xeon L5609
Socket	FM2+	LGA1366
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	DDR3-2133	—
Max RAM Capacity	64 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	16	—

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Value Analysis

At launch, the Athlon X4 840 was priced at $102, while the Xeon L5609 came in at $229. On launch pricing ($102 vs $229), Athlon X4 840 was $127 cheaper. In terms of value on MSRP (PassMark points per dollar), the Athlon X4 840 delivers 32.7 pts/$ vs 14.4 pts/$ for the Xeon L5609 — making the Athlon X4 840 the 77.6% better value option.

Feature	Athlon X4 840	Xeon L5609
MSRP	$102-55%	$229
Performance per Dollar	32.7+127%	14.4
Release Date	2014	2010

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