Phenom II X2 X640 BE vs Xeon E5540

Phenom II X2 X640 BE vs Xeon E5540 Performance Spectrum

Phenom II X2 X640 BE

2 / 2

2,839

+1.2%

Ryzen Threadripper 3990X

Xeon E5540

4 / 8

2,805

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.

Phenom II X2 X640 BE vs Xeon E5540 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.

Phenom II X2 X640 BE vs Xeon E5540: Pros, Cons & Final Verdict

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

Phenom II X2 X640 BE

2011

Why buy it

✅+1.2% higher PassMark.
✅Draws 2W instead of 80W, a 78W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon E5540 across 50 shared CPU benchmark tests.
❌Less compelling for workstation-style loads than Xeon E5540, which brings 4 cores / 8 threads.

Xeon E5540

2009

Why buy it

✅Better for gaming: +4.4% higher average FPS across 50 shared CPU benchmark tests.
✅Better for workstations and heavier parallel workloads: 4 cores / 8 threads.

Trade-offs

❌Lower PassMark (2,805 vs 2,839).
❌3900% higher power demand at 80W vs 2W.

Quick Answers

So, is Phenom II X2 X640 BE better than Xeon E5540?

Not really, because they are built for different jobs. Xeon E5540 makes more sense for workstation-style multi-core throughput, while Phenom II X2 X640 BE 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, Phenom II X2 X640 BE is the stronger fit. You are getting 1.2% better PassMark, backed by 2 cores and 2 threads.

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

Phenom II X2 X640 BE still makes the most sense overall. Phenom II X2 X640 BE comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you 1.2% better PassMark.

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

Phenom II X2 X640 BE makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2011 vs 2009) and more multi-core headroom with 2 cores / 2 threads instead of 4/8. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Phenom II X2 X640 BE vs Xeon E5540 Technical Specifications

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

Phenom II X2 X640 BE

The Phenom II X2 X640 BE is manufactured by AMD. It was released in 2009-01-01. It is based on the Champlain (2010−2011) architecture. It features 2 cores and 2 threads. Max frequency: 3.2 GHz. L2 cache: 2 MB. Built on 45 nm process technology. Socket: S1. Thermal design power (TDP): 2 MB. Memory support: DDR3. Passmark benchmark score: 2,839 points. Launch price was $149.

Xeon E5540

The Xeon E5540 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 2.53 GHz, with boost up to 2.8 GHz. L3 cache: 8 MB (total). L2 cache: 256 kB (per core). Built on 45 nm process technology. Socket: LGA1366. Thermal design power (TDP): 80 Watt. Memory support: DDR3. Passmark benchmark score: 2,805 points. Launch price was $30.

⚡

Processing Power

The Phenom II X2 X640 BE packs 2 cores / 2 threads, while the Xeon E5540 offers 4 cores / 8 threads — the Xeon E5540 has 2 more cores. Boost clocks reach 3.2 GHz on the Phenom II X2 X640 BE versus 2.8 GHz on the Xeon E5540 — a 13.3% clock advantage for the Phenom II X2 X640 BE. The Phenom II X2 X640 BE uses the Champlain (2010−2011) architecture (45 nm), while the Xeon E5540 uses Gainestown (2009−2010) (45 nm). In PassMark, the Phenom II X2 X640 BE scores 2,839 against the Xeon E5540's 2,805 — a 1.2% lead for the Phenom II X2 X640 BE.

Feature	Phenom II X2 X640 BE	Xeon E5540
Cores / Threads	2 / 2	4 / 8+100%
Boost Clock	3.2 GHz+14%	2.8 GHz
Base Clock	—	2.53 GHz
L3 Cache	—	8 MB (total)
L2 Cache	2 MB+700%	256 kB (per core)
Process	45 nm	45 nm
Architecture	Champlain (2010−2011)	Gainestown (2009−2010)
PassMark	2,839+1%	2,805

🧠

Memory & Platform

The Phenom II X2 X640 BE uses the S1 socket (PCIe 2.0), while the Xeon E5540 uses LGA1366 (PCIe 2.0) — making them incompatible on the same motherboard.