Core 2 Duo E6400 vs Core 2 Duo P9700

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 E6400 vs Core 2 Duo P9700 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 E6400 vs Core 2 Duo P9700: 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 E6400

2006

Why buy it

✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Includes a boxed cooler (true), unlike Core 2 Duo P9700.

Trade-offs

❌Lower PassMark (1,175 vs 1,178).
❌Launch MSRP is still $183 MSRP, while Core 2 Duo P9700 mostly shows up through inconsistent older-market listings.
❌132.1% higher power demand at 65W vs 28W.

Core 2 Duo P9700

2009

Why buy it

✅Draws 28W instead of 65W, a 37W reduction.

Trade-offs

❌No boxed cooler included, unlike Core 2 Duo E6400.

Quick Answers

So, is Core 2 Duo P9700 better than Core 2 Duo E6400?

Yes. Core 2 Duo P9700 is the better all-around CPU here. It gives you a 1.9% 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, Core 2 Duo P9700 is the better pick. According to our tests, it delivers 1.9% 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 P9700 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?

Core 2 Duo P9700 is still the much better call for a fresh build. Core 2 Duo P9700 comes in at an unclear MSRP at unclear MSRP versus $183 MSRP, and it still gives you a 1.9% average FPS lead across 50 shared CPU game tests in our data. Core 2 Duo E6400 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2006 platform. Even with 100.0% better value on paper (6.4 vs 0.0 PassMark/$), 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 P9700 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2009 vs 2006) 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 E6400 vs Core 2 Duo P9700 Technical Specifications

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

Core 2 Duo E6400

The Core 2 Duo E6400 is manufactured by Intel. It was released in 2008-01-01. It is based on the Conroe (2006−2007) architecture. It features 2 cores and 2 threads. Base frequency is 2.13 GHz, with boost up to 2.13 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: 1,175 points. Launch price was $249.

Core 2 Duo P9700

The Core 2 Duo P9700 is manufactured by Intel. It was released in 2 June 2009 (16 years ago). It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 2.8 GHz, with boost up to 2.8 GHz. L3 cache: 6 MB L2 Cache. L2 cache: 6 MB (total). Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 28 Watt. Memory support: DDR2, DDR3. Passmark benchmark score: 1,178 points. Launch price was $348.

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Processing Power

Both the Core 2 Duo E6400 and Core 2 Duo P9700 share an identical 2-core/2-thread configuration. Boost clocks reach 2.13 GHz on the Core 2 Duo E6400 versus 2.8 GHz on the Core 2 Duo P9700 — a 27.2% clock advantage for the Core 2 Duo P9700 (base: 2.13 GHz vs 2.8 GHz). The Core 2 Duo E6400 uses the Conroe (2006−2007) architecture (65 nm), while the Core 2 Duo P9700 uses Penryn (2008−2011) (45 nm). In PassMark, the Core 2 Duo E6400 scores 1,175 against the Core 2 Duo P9700's 1,178 — a 0.3% lead for the Core 2 Duo P9700. L3 cache: 0 kB on the Core 2 Duo E6400 vs 6 MB L2 Cache on the Core 2 Duo P9700.

Feature	Core 2 Duo E6400	Core 2 Duo P9700
Cores / Threads	2 / 2	2 / 2
Boost Clock	2.13 GHz	2.8 GHz+31%
Base Clock	2.13 GHz	2.8 GHz+31%
L3 Cache	0 kB	6 MB L2 Cache
L2 Cache	2 MB	6 MB (total)+200%
Process	65 nm	45 nm-31%
Architecture	Conroe (2006−2007)	Penryn (2008−2011)
PassMark	1,175	1,178

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Memory & Platform

The Core 2 Duo E6400 uses the LGA775 socket (PCIe 1.1), while the Core 2 Duo P9700 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard.

Feature	Core 2 Duo E6400	Core 2 Duo P9700
Socket	LGA775	PGA478
PCIe Generation	PCIe 1.1	PCIe 1.1
Max RAM Speed	1066	—
Max RAM Capacity	16	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	16	—

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Advanced Features

Virtualization: true (Core 2 Duo E6400) / not specified (Core 2 Duo P9700). Direct competitor: Core 2 Duo E6400 rivals Athlon 64 X2 5400+.