Core Duo T2600 vs Xeon E5405

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.

Core Duo T2600 vs Xeon E5405 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.

Core Duo T2600 vs Xeon E5405: Pros, Cons & Final Verdict

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

Core Duo T2600

2006

Why buy it

✅Draws 2W instead of 80W, a 78W reduction.

Trade-offs

❌Less compelling for workstation-style loads than Xeon E5405, which brings 4 cores / 4 threads.

Xeon E5405

2007

Why buy it

✅Better for workstations and heavier parallel workloads: 4 cores / 4 threads.

Trade-offs

❌Lower PassMark (1,753 vs 1,765).
❌Launch MSRP is still $209 MSRP, while Core Duo T2600 mostly shows up through inconsistent older-market listings.
❌3900% higher power demand at 80W vs 2W.

Quick Answers

So, is Core Duo T2600 better than Xeon E5405?

Not really, because they are built for different jobs. Xeon E5405 makes more sense for workstation-style multi-core throughput, while Core Duo T2600 is the more practical desktop choice for gaming, platform cost, and everyday use.

Which one is better for gaming?

If gaming is the priority, Core Duo T2600 is the better pick. According to our tests, it delivers 0.5% 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, Core Duo T2600 is the stronger fit. You are getting 0.7% better PassMark, backed by 2 cores and 2 threads.

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

Core Duo T2600 is still the faster CPU overall, but Xeon E5405 is easier to justify if budget matters more than peak performance. Core Duo T2600 comes in at an unclear MSRP at unclear MSRP versus $209 MSRP, and it still gives you a 0.5% average FPS lead across 50 shared CPU game tests in our data. Xeon E5405 is also 100.0% better value on MSRP (8.4 vs 0.0 PassMark/$), which is why it can still make sense for tighter-budget builds on paper.

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

Xeon E5405 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2007 vs 2006). That makes it the safer long-term bet.

Core Duo T2600 vs Xeon E5405 Technical Specifications

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

Core Duo T2600

The Core Duo T2600 is manufactured by Intel. It was released in 5 January 2006 (19 years ago). It is based on the Yonah (2005−2006) architecture. It features 2 cores and 2 threads. Base frequency is 2.16 GHz, with boost up to 2.16 GHz. L3 cache: 0 kB. L2 cache: 2 MB. Built on 65 nm process technology. Socket: PGA478. Thermal design power (TDP): 31 Watt. Memory support: DDR1. Passmark benchmark score: 1,765 points. Launch price was $440.

Xeon E5405

The Xeon E5405 is manufactured by Intel. It was released in 11 November 2007 (18 years ago). It is based on the Harpertown (2007−2008) architecture. It features 4 cores and 4 threads. Base frequency is 2 GHz, with boost up to 2 GHz. L3 cache: 12 MB L2 Cache. L2 cache: 6 MB (total). Built on 45 nm process technology. Socket: LGA771. Thermal design power (TDP): 80 Watt. Memory support: DDR2, DDR3 Depends on motherboard. Passmark benchmark score: 1,753 points. Launch price was $209.

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Processing Power

The Core Duo T2600 packs 2 cores / 2 threads, while the Xeon E5405 offers 4 cores / 4 threads — the Xeon E5405 has 2 more cores. Boost clocks reach 2.16 GHz on the Core Duo T2600 versus 2 GHz on the Xeon E5405 — a 7.7% clock advantage for the Core Duo T2600 (base: 2.16 GHz vs 2 GHz). The Core Duo T2600 uses the Yonah (2005−2006) architecture (65 nm), while the Xeon E5405 uses Harpertown (2007−2008) (45 nm). In PassMark, the Core Duo T2600 scores 1,765 against the Xeon E5405's 1,753 — a 0.7% lead for the Core Duo T2600. L3 cache: 0 kB on the Core Duo T2600 vs 12 MB L2 Cache on the Xeon E5405.

Feature	Core Duo T2600	Xeon E5405
Cores / Threads	2 / 2	4 / 4+100%
Boost Clock	2.16 GHz+8%	2 GHz
Base Clock	2.16 GHz+8%	2 GHz
L3 Cache	0 kB	12 MB L2 Cache
L2 Cache	2 MB	6 MB (total)+200%
Process	65 nm	45 nm-31%
Architecture	Yonah (2005−2006)	Harpertown (2007−2008)
PassMark	1,765	1,753

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Memory & Platform

The Core Duo T2600 uses the PGA478 socket (PCIe 1.1), while the Xeon E5405 uses LGA771 (PCIe 2.0) — making them incompatible on the same motherboard.