Xeon E5405 vs Xeon L5408

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.

Xeon E5405 vs Xeon L5408 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.

Xeon E5405 vs Xeon L5408: Pros, Cons & Final Verdict

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

Xeon E5405

2007

Why buy it

Trade-offs

❌Lower PassMark (1,753 vs 1,769).
❌Launch MSRP is still $209 MSRP, while Xeon L5408 mostly shows up through inconsistent older-market listings.
❌100% higher power demand at 80W vs 40W.

Xeon L5408

2008

Why buy it

✅+0.9% higher PassMark.
✅Draws 40W instead of 80W, a 40W reduction.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Quick Answers

So, is Xeon L5408 better than Xeon E5405?

It depends on what you want from the system. For gaming, Xeon E5405 is ahead with a 0.7% average FPS lead across 18 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Xeon L5408 pulls ahead with 0.9% better PassMark.

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

For streaming, content creation, and heavier multitasking, Xeon L5408 is the stronger fit. You are getting 0.9% better PassMark, backed by 4 cores and 4 threads.

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

Xeon L5408 is still the faster CPU overall, but Xeon E5405 is easier to justify if budget matters more than peak performance. Xeon L5408 comes in at an unclear MSRP at unclear MSRP versus $209 MSRP, and it still gives you 0.9% better PassMark. The compromise is that Xeon E5405 is still the better pure gaming CPU with a 0.7% average FPS lead across 18 shared CPU game tests in our data. Xeon E5405 is also 100.0% better value on MSRP (8.4 vs 0.0 PassMark/$), 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 L5408 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2008 vs 2007) 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.

Xeon E5405 vs Xeon L5408 Technical Specifications

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

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.

Xeon L5408

The Xeon L5408 is manufactured by Intel. It was released in 2015-01-01. It is based on the Harpertown (2007−2008) architecture. It features 4 cores and 4 threads. Base frequency is 2.133 GHz, with boost up to 0.13 GHz. L2 cache: 6 MB (total). Built on 45 nm process technology. Socket: LGA771. Thermal design power (TDP): 40 Watt. Memory support: DDR2, DDR3 Depends on motherboard. Passmark benchmark score: 1,769 points. Launch price was $800.

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Processing Power

Both the Xeon E5405 and Xeon L5408 share an identical 4-core/4-thread configuration. Boost clocks reach 2 GHz on the Xeon E5405 versus 0.13 GHz on the Xeon L5408 — a 175.6% clock advantage for the Xeon E5405 (base: 2 GHz vs 2.133 GHz). Both are built on the Harpertown (2007−2008) architecture using a 45 nm process. In PassMark, the Xeon E5405 scores 1,753 against the Xeon L5408's 1,769 — a 0.9% lead for the Xeon L5408.

Feature	Xeon E5405	Xeon L5408
Cores / Threads	4 / 4	4 / 4
Boost Clock	2 GHz+1438%	0.13 GHz
Base Clock	2 GHz	2.133 GHz+7%
L3 Cache	12 MB L2 Cache	—
L2 Cache	6 MB (total)	6 MB (total)
Process	45 nm	45 nm
Architecture	Harpertown (2007−2008)	Harpertown (2007−2008)
PassMark	1,753	1,769