Core M-5Y51 vs Pentium Dual Core T3400

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 M-5Y51 vs Pentium Dual Core T3400 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 M-5Y51 vs Pentium Dual Core T3400: Pros, Cons & Final Verdict

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

Core M-5Y51

2014

Why buy it

Trade-offs

❌Launch MSRP is still $281 MSRP, while Pentium Dual Core T3400 mostly shows up through inconsistent older-market listings.
❌51100% higher power demand at 512W vs 1W.

Pentium Dual Core T3400

2008

Why buy it

✅Draws 1W instead of 512W, a 511W reduction.

Trade-offs

❌Lower PassMark (2,026 vs 2,030).

Quick Answers

So, is Core M-5Y51 better than Pentium Dual Core T3400?

Yes. Core M-5Y51 is the better all-around CPU here. It gives you a 2.7% average FPS lead across 50 shared CPU game tests in our data, 0.2% 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, Core M-5Y51 is the better pick. According to our tests, it delivers 2.7% 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 M-5Y51 is the stronger fit. You are getting 0.2% better PassMark, backed by 2 cores and 4 threads.

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

Core M-5Y51 is the better buy right now. Core M-5Y51 comes in at an unclear MSRP at $281 MSRP versus unclear MSRP, and it still gives you a 2.7% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (7.2 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Core M-5Y51 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2014 vs 2008) and more multi-core headroom with 2 cores / 4 threads instead of 2/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core M-5Y51 vs Pentium Dual Core T3400 Technical Specifications

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

Core M-5Y51

The Core M-5Y51 is manufactured by Intel. It was released in 27 October 2014 (11 years ago). It is based on the Broadwell-Y (2014) architecture. It features 2 cores and 4 threads. Base frequency is 1.1 GHz, with boost up to 2.6 GHz. L3 cache: 4 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: FCBGA1234. Thermal design power (TDP): 4.5 Watt. Memory support: DDR3. Passmark benchmark score: 2,030 points. Launch price was $69.

Pentium Dual Core T3400

The Pentium Dual Core T3400 is manufactured by Intel. It was released in 2007-01-01. It is based on the NetBurst (2000−2006) architecture. It features 2 cores and 2 threads. Max frequency: 2.16 GHz. L2 cache: 1 MB. Built on 65 nm process technology. Socket: PGA478. Thermal design power (TDP): 1 MB. Passmark benchmark score: 2,026 points. Launch price was $69.

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Processing Power

The Core M-5Y51 packs 2 cores / 4 threads, matching the Pentium Dual Core T3400's 2 cores. Boost clocks reach 2.6 GHz on the Core M-5Y51 versus 2.16 GHz on the Pentium Dual Core T3400 — a 18.5% clock advantage for the Core M-5Y51. The Core M-5Y51 uses the Broadwell-Y (2014) architecture (14 nm), while the Pentium Dual Core T3400 uses NetBurst (2000−2006) (65 nm). In PassMark, the Core M-5Y51 scores 2,030 against the Pentium Dual Core T3400's 2,026 — a 0.2% lead for the Core M-5Y51.

Feature	Core M-5Y51	Pentium Dual Core T3400
Cores / Threads	2 / 4	2 / 2
Boost Clock	2.6 GHz+20%	2.16 GHz
Base Clock	1.1 GHz	—
L3 Cache	4 MB (total)	—
L2 Cache	256K (per core)+25500%	1 MB
Process	14 nm-78%	65 nm
Architecture	Broadwell-Y (2014)	NetBurst (2000−2006)
PassMark	2,030	2,026

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Memory & Platform

The Core M-5Y51 uses the FCBGA1234 socket (PCIe 3.0), while the Pentium Dual Core T3400 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard.

Feature	Core M-5Y51	Pentium Dual Core T3400
Socket	FCBGA1234	PGA478
PCIe Generation	PCIe 3.0+173%	PCIe 1.1

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Value Analysis

At launch, the Core M-5Y51 was priced at $281, while the Pentium Dual Core T3400 came in at $0. On launch pricing ($281 vs $0), Pentium Dual Core T3400 was $281 cheaper.

Feature	Core M-5Y51	Pentium Dual Core T3400
MSRP	$281	$0-100%
Performance per Dollar	7.2	—
Release Date	2014	2008

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