CPU
GPU
Core 2 Duo E6400
Celeron M 723
Performance Spectrum - CPU
About PassMark
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.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. Components placed above yours deliver better value for money. The Core 2 Duo E6400 is positioned at rank 1059 and the Celeron M 723 is on rank 1153, so the Core 2 Duo E6400 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Core 2 Duo E6400
Performance Per Dollar Celeron M 723
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core 2 Duo E6400 | Celeron M 723 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($10) | ⚠️ Higher cost ($161) |
| Longevity | 🛑 Legacy (Conroe (2006−2007) / 65 nm) | 🛑 Legacy (Penryn (2008−2011) / 45 nm) |
💎 Value Proposition
| Insight | Core 2 Duo E6400 | Celeron M 723 |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+1503%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($10) | ⚠️ Higher cost ($161) |
Performance Check
To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.
Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.
Technical Specifications
Side-by-side comparison of Core 2 Duo E6400 and Celeron M 723
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.
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.
Processing Power
The Core 2 Duo E6400 packs 2 cores / 2 threads, while the Celeron M 723 offers 1 cores / 1 threads — the Core 2 Duo E6400 has 1 more core. Boost clocks reach 2.13 GHz on the Core 2 Duo E6400 versus 1.2 GHz on the Celeron M 723 — a 55.9% clock advantage for the Core 2 Duo E6400. The Core 2 Duo E6400 uses the Conroe (2006−2007) architecture (65 nm), while the Celeron M 723 uses Penryn (2008−2011) (45 nm). In PassMark, the Core 2 Duo E6400 scores 1,175 against the Celeron M 723's 1,180 — a 0.4% lead for the Celeron M 723.
| Feature | Core 2 Duo E6400 | Celeron M 723 |
|---|---|---|
| Cores / Threads | 2 / 2+100% | 1 / 1 |
| Boost Clock | 2.13 GHz+78% | 1.2 GHz |
| Base Clock | 2.13 GHz | — |
| L3 Cache | 0 kB | — |
| L2 Cache | 2 MB+100% | 1 MB |
| Process | 65 nm | 45 nm-31% |
| Architecture | Conroe (2006−2007) | Penryn (2008−2011) |
| PassMark | 1,175 | 1,180 |
| Geekbench 6 Single | — | 100 |
| Geekbench 6 Multi | — | 100 |
Memory & Platform
The Core 2 Duo E6400 uses the LGA775 socket (PCIe 1.1), while the Celeron M 723 uses BGA956 (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches 1066 on the Core 2 Duo E6400 versus DDR2-800 on the Celeron M 723 — the Core 2 Duo E6400 supports 199.3% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core 2 Duo E6400 supports up to 16 of RAM compared to 8 GB — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Core 2 Duo E6400) vs 0 (Celeron M 723) — the Core 2 Duo E6400 offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: P35,G31,G33,P45 (Core 2 Duo E6400) and GS45 (Celeron M 723).
| Feature | Core 2 Duo E6400 | Celeron M 723 |
|---|---|---|
| Socket | LGA775 | BGA956 |
| PCIe Generation | PCIe 1.1 | PCIe 1.1 |
| Max RAM Speed | 1066+53200% | DDR2-800 |
| Max RAM Capacity | 16 | 8 GB+52428700% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 16 | 0 |
Advanced Features
Neither processor supports overclocking. Virtualization support: true (Core 2 Duo E6400) vs None (Celeron M 723). Primary use case: Celeron M 723 targets Legacy Embedded. Direct competitor: Core 2 Duo E6400 rivals Athlon 64 X2 5400+; Celeron M 723 rivals Core Solo U2100.
| Feature | Core 2 Duo E6400 | Celeron M 723 |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | None | None |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | true | None |
| Target Use | — | Legacy Embedded |
Value Analysis
The Core 2 Duo E6400 launched at $183 MSRP, while the Celeron M 723 debuted at $161. At current prices ($10 vs $161), the Core 2 Duo E6400 is $151 cheaper. In terms of value (PassMark points per dollar), the Core 2 Duo E6400 delivers 117.5 pts/$ vs 7.3 pts/$ for the Celeron M 723 — making the Core 2 Duo E6400 the 176.5% better value option.
| Feature | Core 2 Duo E6400 | Celeron M 723 |
|---|---|---|
| MSRP | $183 | $161-12% |
| Avg Price (30d) | $10-94% | $161 |
| Performance per Dollar | 117.5+1510% | 7.3 |
| Release Date | 2006 | 2008 |
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