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.

Celeron M 723 vs Core 2 Duo E6400 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.

Celeron M 723 vs Core 2 Duo E6400: Pros, Cons & Final Verdict

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

Celeron M 723

2008

Why buy it

✅+0.4% higher PassMark.
✅Costs $22 less on MSRP ($161 MSRP vs $183 MSRP).
✅Delivers 14.1% more PassMark for each dollar spent, at 7.3 vs 6.4 PassMark/$ ($161 MSRP vs $183 MSRP).
✅Draws 1W instead of 65W, a 64W reduction.

Trade-offs

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

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 Celeron M 723.

Trade-offs

❌Lower PassMark (1,175 vs 1,180).
❌Lower PassMark per dollar, at 6.4 vs 7.3 PassMark/$ ($183 MSRP vs $161 MSRP).
❌6400% higher power demand at 65W vs 1W.

Quick Answers

So, is Celeron M 723 better than Core 2 Duo E6400?

It depends on what you want from the system. For gaming, Core 2 Duo E6400 is ahead with a 2.9% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Celeron M 723 pulls ahead with 0.4% better PassMark.

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

For streaming, content creation, and heavier multitasking, Celeron M 723 is the stronger fit. You are getting 0.4% better PassMark, backed by 1 cores and 1 threads.

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

Celeron M 723 is the better buy right now. Celeron M 723 comes in $22 cheaper on MSRP at $161 MSRP versus $183 MSRP, and it still gives you 0.4% better PassMark. The compromise is that Core 2 Duo E6400 is still the better pure gaming CPU with a 2.9% average FPS lead across 50 shared CPU game tests in our data. It is also 14.1% better value on MSRP (7.3 vs 6.4 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Celeron M 723 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2008 vs 2006) and more multi-core headroom with 1 cores / 1 threads instead of 2/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Celeron M 723 vs Core 2 Duo E6400 Technical Specifications

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

Celeron M 723

The Celeron M 723 is manufactured by Intel. It was released in 2007-01-01. It is based on the Penryn (2008−2011) architecture. It features 1 cores and 1 threads. Max frequency: 1.2 GHz. L2 cache: 1 MB. Built on 45 nm process technology. Socket: BGA956. Thermal design power (TDP): 1 MB. Passmark benchmark score: 1,180 points. Launch price was $69.

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.

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Processing Power

The Celeron M 723 packs 1 cores / 1 threads, while the Core 2 Duo E6400 offers 2 cores / 2 threads — the Core 2 Duo E6400 has 1 more core. Boost clocks reach 1.2 GHz on the Celeron M 723 versus 2.13 GHz on the Core 2 Duo E6400 — a 55.9% clock advantage for the Core 2 Duo E6400. The Celeron M 723 uses the Penryn (2008−2011) architecture (45 nm), while the Core 2 Duo E6400 uses Conroe (2006−2007) (65 nm). In PassMark, the Celeron M 723 scores 1,180 against the Core 2 Duo E6400's 1,175 — a 0.4% lead for the Celeron M 723.

Feature	Celeron M 723	Core 2 Duo E6400
Cores / Threads	1 / 1	2 / 2+100%
Boost Clock	1.2 GHz	2.13 GHz+78%
Base Clock	—	2.13 GHz
L3 Cache	—	0 kB
L2 Cache	1 MB	2 MB+100%
Process	45 nm-31%	65 nm
Architecture	Penryn (2008−2011)	Conroe (2006−2007)
PassMark	1,180	1,175
Geekbench 6 Single	100	—
Geekbench 6 Multi	100	—

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Memory & Platform

The Celeron M 723 uses the BGA956 socket (PCIe 1.1), while the Core 2 Duo E6400 uses LGA775 (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR2-800 on the Celeron M 723 versus 1066 on the Core 2 Duo E6400 — the Core 2 Duo E6400 supports 33.3% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core 2 Duo E6400 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 (Celeron M 723) vs 16 (Core 2 Duo E6400) — the Core 2 Duo E6400 offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: GS45 (Celeron M 723) and P35,G31,G33,P45 (Core 2 Duo E6400).

Feature	Celeron M 723	Core 2 Duo E6400
Socket	BGA956	LGA775
PCIe Generation	PCIe 1.1	PCIe 1.1
Max RAM Speed	DDR2-800	1066+33%
Max RAM Capacity	8 GB	16 GB+100%
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	0	16

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Advanced Features

Neither processor supports overclocking. Virtualization support: None (Celeron M 723) vs true (Core 2 Duo E6400). Primary use case: Celeron M 723 targets Legacy Embedded. Direct competitor: Celeron M 723 rivals Core Solo U2100; Core 2 Duo E6400 rivals Athlon 64 X2 5400+.

Feature	Celeron M 723	Core 2 Duo E6400
Integrated GPU	No	No
IGPU Model	None	None
Unlocked	No	No
AVX-512	No	No
Virtualization	None	true
Target Use	Legacy Embedded	—

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Value Analysis

At launch, the Celeron M 723 was priced at $161, while the Core 2 Duo E6400 came in at $183. On launch pricing ($161 vs $183), Celeron M 723 was $22 cheaper. In terms of value on MSRP (PassMark points per dollar), the Celeron M 723 delivers 7.3 pts/$ vs 6.4 pts/$ for the Core 2 Duo E6400 — making the Celeron M 723 the 13.2% better value option.

Feature	Celeron M 723	Core 2 Duo E6400
MSRP	$161-12%	$183
Performance per Dollar	7.3+14%	6.4
Release Date	2008	2006

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