Celeron 420 vs Sempron LE-1250
Celeron 420
Sempron LE-1250
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 Celeron 420 is positioned at rank 982 and the Sempron LE-1250 is on rank 919, so the Sempron LE-1250 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Celeron 420
Performance Per Dollar Sempron LE-1250
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Celeron 420 | Sempron LE-1250 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ✅ More affordable ($15) | ⚠️ Higher cost ($20) |
| Longevity | 🛑 Legacy (Conroe-L (2007−2008) / 65 nm) | 🛑 Legacy (Sparta (2007) / 65 nm) |
💎 Value Proposition
| Insight | Celeron 420 | Sempron LE-1250 |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+35%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($15) | ⚠️ Higher cost ($20) |
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 Celeron 420 and Sempron LE-1250
Celeron 420
The Celeron 420 is manufactured by Intel. It was released in 3 June 2007 (18 years ago). It is based on the Conroe-L (2007−2008) architecture. It features 1 cores and 1 threads. Base frequency is 1.6 GHz, with boost up to 1.6 GHz. L3 cache: 0 kB. L2 cache: 512 kB (total). Built on 65 nm process technology. Socket: LGA775. Thermal design power (TDP): 35 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 425 points. Launch price was $23.
Sempron LE-1250
The Sempron LE-1250 is manufactured by AMD. It was released in Outubro 2007 (18 years ago). It is based on the Sparta (2007) architecture. It features 1 cores and 1 threads. Max frequency: 2.2 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 65 nm process technology. Socket: AM2. Thermal design power (TDP): 45 Watt. Passmark benchmark score: 420 points. Launch price was $29.
Processing Power
Both the Celeron 420 and Sempron LE-1250 share an identical 1-core/1-thread configuration. Boost clocks reach 1.6 GHz on the Celeron 420 versus 2.2 GHz on the Sempron LE-1250 — a 31.6% clock advantage for the Sempron LE-1250. The Celeron 420 uses the Conroe-L (2007−2008) architecture (65 nm), while the Sempron LE-1250 uses Sparta (2007) (65 nm). In PassMark, the Celeron 420 scores 425 against the Sempron LE-1250's 420 — a 1.2% lead for the Celeron 420. Both processors carry 0 kB of L3 cache.
| Feature | Celeron 420 | Sempron LE-1250 |
|---|---|---|
| Cores / Threads | 1 / 1 | 1 / 1 |
| Boost Clock | 1.6 GHz | 2.2 GHz+38% |
| Base Clock | 1.6 GHz | — |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 512 kB (total) | 512 kB |
| Process | 65 nm | 65 nm |
| Architecture | Conroe-L (2007−2008) | Sparta (2007) |
| PassMark | 425+1% | 420 |
Memory & Platform
The Celeron 420 uses the LGA775 socket (PCIe 1.1), while the Sempron LE-1250 uses AM2 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Celeron 420 | Sempron LE-1250 |
|---|---|---|
| Socket | LGA775 | AM2 |
| PCIe Generation | PCIe 1.1 | PCIe 2.0+82% |
| Max RAM Speed | DDR2-800 | — |
| Max RAM Capacity | 16 GB | — |
| RAM Channels | 2 | — |
| ECC Support | ❌ | — |
| PCIe Lanes | 0 | — |
Advanced Features
Virtualization: No (Celeron 420) / not specified (Sempron LE-1250). Primary use case: Celeron 420 targets Budget. Direct competitor: Celeron 420 rivals Pentium 4 2.80.
| Feature | Celeron 420 | Sempron LE-1250 |
|---|---|---|
| Integrated GPU | No | — |
| Unlocked | No | — |
| AVX-512 | No | — |
| Virtualization | No | — |
| Target Use | Budget | — |
Value Analysis
At current prices ($15 vs $20), the Celeron 420 is $5 cheaper. In terms of value (PassMark points per dollar), the Celeron 420 delivers 28.3 pts/$ vs 21.0 pts/$ for the Sempron LE-1250 — making the Celeron 420 the 29.7% better value option.
| Feature | Celeron 420 | Sempron LE-1250 |
|---|---|---|
| MSRP | $39 | — |
| Avg Price (30d) | $15-25% | $20 |
| Performance per Dollar | 28.3+35% | 21.0 |
| Release Date | 2007 | 2007 |
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