Core 2 Duo T9400 vs Core i5-540UM

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 Core i5-540UM 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 Core i5-540UM: 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

✅+100% larger total L3 cache (6 MB vs 3 MB).
✅Draws 6W instead of 18W, a 12W reduction.

Trade-offs

❌No integrated graphics, while Core i5-540UM can still boot and troubleshoot without a discrete GPU.

Core i5-540UM

2010

Why buy it

✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Intel HD Graphics (Ironlake), while Core 2 Duo T9400 needs a discrete GPU.

Trade-offs

❌Lower PassMark (1,002 vs 1,004).
❌Smaller total L3 cache (3 MB vs 6 MB).
❌200% higher power demand at 18W vs 6W.

Quick Answers

So, is Core 2 Duo T9400 better than Core i5-540UM?

Yes. Core 2 Duo T9400 is the better all-around CPU here. It gives you a 0.2% average FPS lead across 50 shared CPU game tests in our data and 0.2% 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 T9400 is the better pick. According to our tests, it delivers 0.2% 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 2 Duo T9400 is the stronger fit. You are getting 0.2% better PassMark, backed by 2 cores and 2 threads. It also has the larger cache pool with 100% larger total L3 cache (6 MB vs 3 MB).

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

Core 2 Duo T9400 still makes the most sense overall. Core 2 Duo T9400 comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you a 0.2% average FPS lead across 50 shared CPU game tests in our data.

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

Core i5-540UM makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2010 vs 2008). That makes it the safer long-term bet.

Core 2 Duo T9400 vs Core i5-540UM 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.

Core i5-540UM

The Core i5-540UM is manufactured by Intel. It was released in 24 May 2010 (15 years ago). It is based on the Arrandale (2010−2011) architecture. It features 2 cores and 4 threads. Base frequency is 1.2 GHz, with boost up to 2 GHz. L3 cache: 3 MB. L2 cache: 512 kB. Built on 32 nm process technology. Socket: BGA1288. Thermal design power (TDP): 18 Watt. Memory support: DDR3. Passmark benchmark score: 1,002 points. Launch price was $250.

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Processing Power

The Core 2 Duo T9400 packs 2 cores / 2 threads, matching the Core i5-540UM's 2 cores. Boost clocks reach 2.53 GHz on the Core 2 Duo T9400 versus 2 GHz on the Core i5-540UM — a 23.4% clock advantage for the Core 2 Duo T9400 (base: 2.53 GHz vs 1.2 GHz). The Core 2 Duo T9400 uses the Penryn (2008−2011) architecture (45 nm), while the Core i5-540UM uses Arrandale (2010−2011) (32 nm). In PassMark, the Core 2 Duo T9400 scores 1,004 against the Core i5-540UM's 1,002 — a 0.2% lead for the Core 2 Duo T9400. L3 cache: 6 MB L2 Cache on the Core 2 Duo T9400 vs 3 MB on the Core i5-540UM.

Feature	Core 2 Duo T9400	Core i5-540UM
Cores / Threads	2 / 2	2 / 4
Boost Clock	2.53 GHz+26%	2 GHz
Base Clock	2.53 GHz+111%	1.2 GHz
L3 Cache	6 MB L2 Cache+100%	3 MB
L2 Cache	6 MB+1100%	512 kB
Process	45 nm	32 nm-29%
Architecture	Penryn (2008−2011)	Arrandale (2010−2011)
PassMark	1,004	1,002
Geekbench 6 Single	320	—

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Memory & Platform

The Core 2 Duo T9400 uses the PGA478 socket (PCIe 1.1), while the Core i5-540UM uses BGA1288 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1066 on the Core 2 Duo T9400 versus 800 on the Core i5-540UM — the Core 2 Duo T9400 supports 33.3% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both feature 2-channel memory with ECC support. Chipset compatibility: GM45,PM45 (Core 2 Duo T9400) and HM55,HM57,QM57,QS57 (Core i5-540UM).

Feature	Core 2 Duo T9400	Core i5-540UM
Socket	PGA478	BGA1288
PCIe Generation	PCIe 1.1	PCIe 2.0+82%
Max RAM Speed	DDR3-1066+33%	800
Max RAM Capacity	—	8
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	—	16

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Advanced Features

Neither processor supports overclocking. Virtualization support: VT-x (Core 2 Duo T9400) vs true (Core i5-540UM). The Core i5-540UM includes integrated graphics (Intel HD Graphics (Ironlake)), while the Core 2 Duo T9400 requires a dedicated GPU. Primary use case: Core 2 Duo T9400 targets Budget. Direct competitor: Core 2 Duo T9400 rivals Athlon Silver 3050U; Core i5-540UM rivals Core 2 Duo SU9400.