Core 2 Quad Q8400 vs Core i3-2125
Core 2 Quad Q8400
Core i3-2125
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 Quad Q8400 is positioned at rank 975 and the Core i3-2125 is on rank 892, so the Core i3-2125 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 Quad Q8400
Performance Per Dollar Core i3-2125
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core 2 Quad Q8400 | Core i3-2125 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($128) | ✅ More affordable ($15) |
| Longevity | 🛑 Legacy (Yorkfield (2007−2009) / 45 nm) | 🛑 Legacy (Sandy Bridge (2011−2013) / 32 nm) |
💎 Value Proposition
| Insight | Core 2 Quad Q8400 | Core i3-2125 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+756%) |
| Upfront Cost | ⚠️ Higher cost ($128) | ✅ More affordable ($15) |
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 Quad Q8400 and Core i3-2125
Core 2 Quad Q8400
The Core 2 Quad Q8400 is manufactured by Intel. It was released in 2008-01-01. It is based on the Yorkfield (2007−2009) architecture. It features 4 cores and 4 threads. Base frequency is 2.66 GHz, with boost up to 0.67 GHz. L3 cache: 0 kB. L2 cache: 4 MB (total). Built on 45 nm process technology. Socket: LGA775. Thermal design power (TDP): 95 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 2,076 points. Launch price was $249.
Core i3-2125
The Core i3-2125 is manufactured by Intel. It was released in 4 September 2011 (14 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 2 cores and 4 threads. Base frequency is 3.3 GHz, with boost up to 3.3 GHz. L3 cache: 3 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1155. Thermal design power (TDP): 65 Watt. Memory support: DDR3. Passmark benchmark score: 2,082 points. Launch price was $170.
Processing Power
The Core 2 Quad Q8400 packs 4 cores / 4 threads, while the Core i3-2125 offers 2 cores / 4 threads — the Core 2 Quad Q8400 has 2 more cores. Boost clocks reach 0.67 GHz on the Core 2 Quad Q8400 versus 3.3 GHz on the Core i3-2125 — a 132.5% clock advantage for the Core i3-2125 (base: 2.66 GHz vs 3.3 GHz). The Core 2 Quad Q8400 uses the Yorkfield (2007−2009) architecture (45 nm), while the Core i3-2125 uses Sandy Bridge (2011−2013) (32 nm). In PassMark, the Core 2 Quad Q8400 scores 2,076 against the Core i3-2125's 2,082 — a 0.3% lead for the Core i3-2125. Geekbench 6 single-core — the metric most relevant to gaming — records 369 vs 499, a 30% lead for the Core i3-2125 that directly translates to higher frame rates. L3 cache: 0 kB on the Core 2 Quad Q8400 vs 3 MB (total) on the Core i3-2125.
| Feature | Core 2 Quad Q8400 | Core i3-2125 |
|---|---|---|
| Cores / Threads | 4 / 4+100% | 2 / 4 |
| Boost Clock | 0.67 GHz | 3.3 GHz+393% |
| Base Clock | 2.66 GHz | 3.3 GHz+24% |
| L3 Cache | 0 kB | 3 MB (total) |
| L2 Cache | 4 MB (total)+1500% | 256 kB (per core) |
| Process | 45 nm | 32 nm-29% |
| Architecture | Yorkfield (2007−2009) | Sandy Bridge (2011−2013) |
| PassMark | 2,076 | 2,082 |
| Cinebench R23 Multi | 852 | — |
| Geekbench 6 Single | 369 | 499+35% |
| Geekbench 6 Multi | 1,155 | — |
Memory & Platform
The Core 2 Quad Q8400 uses the LGA775 socket (PCIe 1.1), while the Core i3-2125 uses LGA1155 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3 1333 MHz on the Core 2 Quad Q8400 versus DDR3-1333 on the Core i3-2125 — the Core 2 Quad Q8400 supports 200% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i3-2125 supports up to 32 GB of RAM compared to 16 GB — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 0 (Core 2 Quad Q8400) vs 16 (Core i3-2125) — the Core i3-2125 offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: Intel P45,Intel G41,Intel Q45,Intel X48,Intel G31 (Core 2 Quad Q8400) and H61,H67,P67,Z68,B65,Q65,Q67,B75,Q75,H77,Z75,Z77 (Core i3-2125).
| Feature | Core 2 Quad Q8400 | Core i3-2125 |
|---|---|---|
| Socket | LGA775 | LGA1155 |
| PCIe Generation | PCIe 1.1 | PCIe 2.0+82% |
| Max RAM Speed | DDR3 1333 MHz | DDR3-1333 |
| Max RAM Capacity | 16 GB | 32 GB+100% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 0 | 16 |
Advanced Features
Neither processor supports overclocking. Virtualization support: true (Core 2 Quad Q8400) vs VT-x, EPT (Core i3-2125). The Core i3-2125 includes integrated graphics (HD Graphics 3000), while the Core 2 Quad Q8400 requires a dedicated GPU. Primary use case: Core 2 Quad Q8400 targets Desktop, Core i3-2125 targets Budget Desktop. Direct competitor: Core i3-2125 rivals A8-3850.
| Feature | Core 2 Quad Q8400 | Core i3-2125 |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | — | HD Graphics 3000 |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | true | VT-x, EPT |
| Target Use | Desktop | Budget Desktop |
Value Analysis
The Core 2 Quad Q8400 launched at $183 MSRP, while the Core i3-2125 debuted at $134. At current prices ($128 vs $15), the Core i3-2125 is $113 cheaper. In terms of value (PassMark points per dollar), the Core 2 Quad Q8400 delivers 16.2 pts/$ vs 138.8 pts/$ for the Core i3-2125 — making the Core i3-2125 the 158.2% better value option.
| Feature | Core 2 Quad Q8400 | Core i3-2125 |
|---|---|---|
| MSRP | $183 | $134-27% |
| Avg Price (30d) | $128 | $15-88% |
| Performance per Dollar | 16.2 | 138.8+757% |
| Release Date | 2009 | 2011 |
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