Core 2 Duo T9400 vs Pentium E5400

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 T9400 vs Pentium E5400 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 T9400 vs Pentium E5400: 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 T9400

2008

Why buy it

✅Draws 6W instead of 65W, a 59W reduction.

Trade-offs

❌Lower PassMark (1,004 vs 1,007).

Pentium E5400

2009

Why buy it

Trade-offs

❌Launch MSRP is still $55 MSRP, while Core 2 Duo T9400 mostly shows up through inconsistent older-market listings.
❌983.3% higher power demand at 65W vs 6W.

Quick Answers

So, is Pentium E5400 better than Core 2 Duo T9400?

Yes. Pentium E5400 is the better all-around CPU here. It gives you a 1.8% average FPS lead across 50 shared CPU game tests in our data, 0.3% better PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Pentium E5400 is the better pick. According to our tests, it delivers 1.8% 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, Pentium E5400 is the stronger fit. You are getting 0.3% better PassMark, backed by 2 cores and 2 threads.

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

Pentium E5400 is the better buy right now. Pentium E5400 comes in at an unclear MSRP at $55 MSRP versus unclear MSRP, and it still gives you a 1.8% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (18.3 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Pentium E5400 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2009 vs 2008) and more multi-core headroom with 2 cores / 2 threads instead of 2/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core 2 Duo T9400 vs Pentium E5400 Technical Specifications

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

Core 2 Duo T9400

The Core 2 Duo T9400 is manufactured by Intel. It was released in 15 July 2008 (17 years ago). It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 2.53 GHz, with boost up to 2.53 GHz. L3 cache: 6 MB L2 Cache. L2 cache: 6 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 35 Watt. Passmark benchmark score: 1,004 points. Launch price was $316.

Pentium E5400

The Pentium E5400 is manufactured by Intel. It was released in 18 January 2009 (16 years ago). It is based on the Wolfdale (2008−2010) architecture. It features 2 cores and 2 threads. Base frequency is 2.7 GHz, with boost up to 2.7 GHz. L3 cache: 0 kB. L2 cache: 2 MB (total). Built on 45 nm process technology. Socket: LGA775. Thermal design power (TDP): 65 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 1,007 points. Launch price was $55.

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Processing Power

Both the Core 2 Duo T9400 and Pentium E5400 share an identical 2-core/2-thread configuration. Boost clocks reach 2.53 GHz on the Core 2 Duo T9400 versus 2.7 GHz on the Pentium E5400 — a 6.5% clock advantage for the Pentium E5400 (base: 2.53 GHz vs 2.7 GHz). The Core 2 Duo T9400 uses the Penryn (2008−2011) architecture (45 nm), while the Pentium E5400 uses Wolfdale (2008−2010) (45 nm). In PassMark, the Core 2 Duo T9400 scores 1,004 against the Pentium E5400's 1,007 — a 0.3% lead for the Pentium E5400. L3 cache: 6 MB L2 Cache on the Core 2 Duo T9400 vs 0 kB on the Pentium E5400.

Feature	Core 2 Duo T9400	Pentium E5400
Cores / Threads	2 / 2	2 / 2
Boost Clock	2.53 GHz	2.7 GHz+7%
Base Clock	2.53 GHz	2.7 GHz+7%
L3 Cache	6 MB L2 Cache	0 kB
L2 Cache	6 MB+200%	2 MB (total)
Process	45 nm	45 nm
Architecture	Penryn (2008−2011)	Wolfdale (2008−2010)
PassMark	1,004	1,007
Geekbench 6 Single	320	—

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Memory & Platform

The Core 2 Duo T9400 uses the PGA478 socket (PCIe 1.1), while the Pentium E5400 uses LGA775 (PCIe 1.1) — making them incompatible on the same motherboard.

Feature	Core 2 Duo T9400	Pentium E5400
Socket	PGA478	LGA775
PCIe Generation	PCIe 1.1	PCIe 1.1
Max RAM Speed	DDR3-1066	—
RAM Channels	2	—
ECC Support	No	—

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Advanced Features

Virtualization: VT-x (Core 2 Duo T9400) / not specified (Pentium E5400). Primary use case: Core 2 Duo T9400 targets Budget. Direct competitor: Core 2 Duo T9400 rivals Athlon Silver 3050U.