Core 2 Duo T5900 vs Pentium 4405U

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 2 Duo T5900 vs Pentium 4405U 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 2 Duo T5900 vs Pentium 4405U: Pros, Cons & Final Verdict

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

Core 2 Duo T5900

2008

Why buy it

✅Draws 2W instead of 512W, a 510W reduction.

Trade-offs

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

Pentium 4405U

2015

Why buy it

Trade-offs

❌Lower PassMark (2,122 vs 2,123).
❌25500% higher power demand at 512W vs 2W.

Quick Answers

So, is Core 2 Duo T5900 better than Pentium 4405U?

Yes. Core 2 Duo T5900 is the better all-around CPU here. It gives you a 2.4% average FPS lead across 48 shared CPU game tests in our data and 0% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Core 2 Duo T5900 is the better pick. According to our tests, it delivers 2.4% more average FPS across 48 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Core 2 Duo T5900 is the stronger fit. You are getting 0% better PassMark, backed by 2 cores and 2 threads.

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

Core 2 Duo T5900 still makes the most sense overall. Core 2 Duo T5900 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 2.4% average FPS lead across 48 shared CPU game tests in our data.

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

Pentium 4405U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2015 vs 2008). That makes it the safer long-term bet.

Core 2 Duo T5900 vs Pentium 4405U Technical Specifications

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

Core 2 Duo T5900

The Core 2 Duo T5900 is manufactured by Intel. It was released in 2008-01-01. It is based on the Merom (2006−2008) architecture. It features 2 cores and 2 threads. Max frequency: 2.2 GHz. L2 cache: 2 MB. Built on 65 nm process technology. Socket: P. Thermal design power (TDP): 2 MB. Passmark benchmark score: 2,123 points. Launch price was $249.

Pentium 4405U

The Pentium 4405U is manufactured by Intel. It was released in 1 September 2015 (10 years ago). It is based on the NetBurst (2000−2006) architecture. It features 2 cores and 4 threads. Base frequency is 2.1 GHz, with boost up to 2.1 GHz. L3 cache: 2 MB. L2 cache: 512 kB. Built on 14 nm process technology. Socket: BGA1356. Thermal design power (TDP): 15 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 2,122 points. Launch price was $161.

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Processing Power

The Core 2 Duo T5900 packs 2 cores / 2 threads, matching the Pentium 4405U's 2 cores. Boost clocks reach 2.2 GHz on the Core 2 Duo T5900 versus 2.1 GHz on the Pentium 4405U — a 4.7% clock advantage for the Core 2 Duo T5900. The Core 2 Duo T5900 uses the Merom (2006−2008) architecture (65 nm), while the Pentium 4405U uses NetBurst (2000−2006) (14 nm). In PassMark, the Core 2 Duo T5900 scores 2,123 against the Pentium 4405U's 2,122 — a 0% lead for the Core 2 Duo T5900.

Feature	Core 2 Duo T5900	Pentium 4405U
Cores / Threads	2 / 2	2 / 4
Boost Clock	2.2 GHz+5%	2.1 GHz
Base Clock	—	2.1 GHz
L3 Cache	—	2 MB
L2 Cache	2 MB+300%	512 kB
Process	65 nm	14 nm-78%
Architecture	Merom (2006−2008)	NetBurst (2000−2006)
PassMark	2,123	2,122

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Memory & Platform

The Core 2 Duo T5900 uses the P socket (PCIe 1.1), while the Pentium 4405U uses BGA1356 (PCIe 3.0) — making them incompatible on the same motherboard.