Core 2 Duo P8400 vs Core i5-4300U

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 P8400 vs Core i5-4300U 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 P8400 vs Core i5-4300U: 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 P8400

2008

Why buy it

✅+0.6% higher PassMark.
✅Draws 3W instead of 512W, a 509W reduction.

Trade-offs

❌Launch MSRP is still $209 MSRP, while Core i5-4300U mostly shows up through inconsistent older-market listings.
❌No integrated graphics, while Core i5-4300U can still boot and troubleshoot without a discrete GPU.

Core i5-4300U

2013

Why buy it

✅100+% more PCIe lanes (12 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Intel HD Graphics 4400, while Core 2 Duo P8400 needs a discrete GPU.

Trade-offs

❌Lower PassMark (2,482 vs 2,497).
❌16966.7% higher power demand at 512W vs 3W.

Quick Answers

So, is Core 2 Duo P8400 better than Core i5-4300U?

It depends on what you want from the system. For gaming, Core i5-4300U is ahead with a 0.4% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core 2 Duo P8400 pulls ahead with 0.6% better PassMark.

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

For streaming, content creation, and heavier multitasking, Core 2 Duo P8400 is the stronger fit. You are getting 0.6% better PassMark, backed by 2 cores and 2 threads.

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

Core 2 Duo P8400 is the better buy right now. Core 2 Duo P8400 comes in at an unclear MSRP at $209 MSRP versus unclear MSRP, and it still gives you 0.6% better PassMark. The compromise is that Core i5-4300U is still the better pure gaming CPU with a 0.4% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (11.9 vs 0.0 PassMark/$), 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 i5-4300U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2013 vs 2008). That makes it the safer long-term bet.

Core 2 Duo P8400 vs Core i5-4300U Technical Specifications

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

Core 2 Duo P8400

The Core 2 Duo P8400 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 2.26 GHz, with boost up to 2.26 GHz. L3 cache: 3 MB L2 Cache. L2 cache: 3 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 25 Watt. Passmark benchmark score: 2,497 points. Launch price was $209.

Core i5-4300U

The Core i5-4300U is manufactured by Intel. It was released in 1 October 2013 (12 years ago). It is based on the Haswell (2013−2015) architecture. It features 2 cores and 4 threads. Base frequency is 1.9 GHz, with boost up to 2.9 GHz. L3 cache: 3 MB. L2 cache: 512 kB. Built on 22 nm process technology. Socket: FCBGA1168. Thermal design power (TDP): 15 Watt. Memory support: DDR3. Passmark benchmark score: 2,482 points. Launch price was $281.

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Processing Power

The Core 2 Duo P8400 packs 2 cores / 2 threads, matching the Core i5-4300U's 2 cores. Boost clocks reach 2.26 GHz on the Core 2 Duo P8400 versus 2.9 GHz on the Core i5-4300U — a 24.8% clock advantage for the Core i5-4300U (base: 2.26 GHz vs 1.9 GHz). The Core 2 Duo P8400 uses the Penryn (2008−2011) architecture (45 nm), while the Core i5-4300U uses Haswell (2013−2015) (22 nm). In PassMark, the Core 2 Duo P8400 scores 2,497 against the Core i5-4300U's 2,482 — a 0.6% lead for the Core 2 Duo P8400. L3 cache: 3 MB L2 Cache on the Core 2 Duo P8400 vs 3 MB on the Core i5-4300U.

Feature	Core 2 Duo P8400	Core i5-4300U
Cores / Threads	2 / 2	2 / 4
Boost Clock	2.26 GHz	2.9 GHz+28%
Base Clock	2.26 GHz+19%	1.9 GHz
L3 Cache	3 MB L2 Cache	3 MB
L2 Cache	3 MB+500%	512 kB
Process	45 nm	22 nm-51%
Architecture	Penryn (2008−2011)	Haswell (2013−2015)
PassMark	2,497	2,482
Geekbench 6 Single	—	607
Geekbench 6 Multi	—	1,722

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Memory & Platform

The Core 2 Duo P8400 uses the PGA478 socket (PCIe 1.1), while the Core i5-4300U uses FCBGA1168 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 1066 on the Core 2 Duo P8400 versus DDR3L-1600 on the Core i5-4300U — the Core i5-4300U supports 50.1% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i5-4300U supports up to 16 GB of RAM compared to 8 GB — 100% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 0 (Core 2 Duo P8400) vs 12 (Core i5-4300U) — the Core i5-4300U offers 12 more lanes for additional GPUs or NVMe drives. Chipset compatibility: GM45,GS45,PM45 (Core 2 Duo P8400) and HM86,HM87 (Core i5-4300U).

Feature	Core 2 Duo P8400	Core i5-4300U
Socket	PGA478	FCBGA1168
PCIe Generation	PCIe 1.1	PCIe 3.0+173%
Max RAM Speed	1066	DDR3L-1600+50%
Max RAM Capacity	8 GB	16 GB+100%
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	0	12

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Advanced Features

Virtualization support: true (Core 2 Duo P8400) vs Yes (Core i5-4300U). The Core i5-4300U includes integrated graphics (Intel HD Graphics 4400), while the Core 2 Duo P8400 requires a dedicated GPU. Direct competitor: Core 2 Duo P8400 rivals Turion II Ultra M600.