Core 2 Duo E4300 vs Core 2 Duo T9400

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 E4300 vs Core 2 Duo T9400 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 E4300 vs Core 2 Duo T9400: 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 E4300

2006

Why buy it

✅+0.1% higher PassMark.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Includes a boxed cooler (true), unlike Core 2 Duo T9400.

Trade-offs

❌Launch MSRP is still $113 MSRP, while Core 2 Duo T9400 mostly shows up through inconsistent older-market listings.
❌983.3% higher power demand at 65W vs 6W.

Core 2 Duo T9400

2008

Why buy it

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

Trade-offs

❌Lower PassMark (1,004 vs 1,005).
❌No boxed cooler included, unlike Core 2 Duo E4300.

Quick Answers

So, is Core 2 Duo T9400 better than Core 2 Duo E4300?

It depends on what you want from the system. For gaming, Core 2 Duo T9400 is ahead with a 1.6% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core 2 Duo E4300 pulls ahead with 0.1% better PassMark.

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

For streaming, content creation, and heavier multitasking, Core 2 Duo E4300 is the stronger fit. You are getting 0.1% better PassMark, backed by 2 cores and 2 threads.

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

Core 2 Duo T9400 is still the much better call for a fresh build. Core 2 Duo T9400 comes in at an unclear MSRP at unclear MSRP versus $113 MSRP, and it still gives you a 1.6% average FPS lead across 50 shared CPU game tests in our data. Core 2 Duo E4300 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2006 platform. Even with 100.0% better value on paper (8.9 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on LGA775.

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

Core 2 Duo T9400 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2008 vs 2006). That makes it the safer long-term bet.

Core 2 Duo E4300 vs Core 2 Duo T9400 Technical Specifications

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

Core 2 Duo E4300

The Core 2 Duo E4300 is manufactured by Intel. It was released in 2008-01-01. It is based on the Allendale (2006−2009) architecture. It features 2 cores and 2 threads. Base frequency is 1.8 GHz, with boost up to 1.8 GHz. L3 cache: 0 kB. L2 cache: 2 MB. Built on 65 nm process technology. Socket: LGA775. Thermal design power (TDP): 65 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 1,005 points. Launch price was $249.

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.

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Processing Power

Both the Core 2 Duo E4300 and Core 2 Duo T9400 share an identical 2-core/2-thread configuration. Boost clocks reach 1.8 GHz on the Core 2 Duo E4300 versus 2.53 GHz on the Core 2 Duo T9400 — a 33.7% clock advantage for the Core 2 Duo T9400 (base: 1.8 GHz vs 2.53 GHz). The Core 2 Duo E4300 uses the Allendale (2006−2009) architecture (65 nm), while the Core 2 Duo T9400 uses Penryn (2008−2011) (45 nm). In PassMark, the Core 2 Duo E4300 scores 1,005 against the Core 2 Duo T9400's 1,004 — a 0.1% lead for the Core 2 Duo E4300. L3 cache: 0 kB on the Core 2 Duo E4300 vs 6 MB L2 Cache on the Core 2 Duo T9400.

Feature	Core 2 Duo E4300	Core 2 Duo T9400
Cores / Threads	2 / 2	2 / 2
Boost Clock	1.8 GHz	2.53 GHz+41%
Base Clock	1.8 GHz	2.53 GHz+41%
L3 Cache	0 kB	6 MB L2 Cache
L2 Cache	2 MB	6 MB+200%
Process	65 nm	45 nm-31%
Architecture	Allendale (2006−2009)	Penryn (2008−2011)
PassMark	1,005	1,004
Geekbench 6 Single	—	320

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Memory & Platform

The Core 2 Duo E4300 uses the LGA775 socket (PCIe 1.1), while the Core 2 Duo T9400 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches 800 on the Core 2 Duo E4300 versus DDR3-1066 on the Core 2 Duo T9400 — 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: P35,G31,G33,P45 (Core 2 Duo E4300) and GM45,PM45 (Core 2 Duo T9400).

Feature	Core 2 Duo E4300	Core 2 Duo T9400
Socket	LGA775	PGA478
PCIe Generation	PCIe 1.1	PCIe 1.1
Max RAM Speed	800	DDR3-1066+33%
Max RAM Capacity	16	—
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	16	—

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Advanced Features

Neither processor supports overclocking. Virtualization support: false (Core 2 Duo E4300) vs VT-x (Core 2 Duo T9400). Primary use case: Core 2 Duo T9400 targets Budget. Direct competitor: Core 2 Duo E4300 rivals Athlon 64 X2 3800+; Core 2 Duo T9400 rivals Athlon Silver 3050U.