CPU
GPU
Celeron M 585
Celeron 2955U
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 M 585 is positioned at rank 430 and the Celeron 2955U is on rank 427, so the Celeron 2955U offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Celeron M 585
Performance Per Dollar Celeron 2955U
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Celeron M 585 | Celeron 2955U |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | Equivalent pricing | Equivalent pricing |
| Longevity | 🛑 Legacy (Merom (2006−2008) / 65 nm) | 🛑 Legacy (Haswell (2013−2015) / 22 nm) |
💎 Value Proposition
| Insight | Celeron M 585 | Celeron 2955U |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | Equivalent pricing | Equivalent pricing |
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 M 585 and Celeron 2955U
Celeron M 585
The Celeron M 585 is manufactured by Intel. It was released in 20 August 2008 (17 years ago). It is based on the Merom (2006−2008) architecture. It features 1 cores and 1 threads. Max frequency: 2.16 GHz. L2 cache: 1 MB. Built on 65 nm process technology. Socket: PGA478. Thermal design power (TDP): 1 MB. Passmark benchmark score: 2,062 points. Launch price was $70.
Celeron 2955U
The Celeron 2955U is manufactured by Intel. It was released in 2007-01-01. It is based on the Haswell (2013−2015) architecture. It features 2 cores and 2 threads. Base frequency is 1.4 GHz, with boost up to 1.4 GHz. L3 cache: 2 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: FCBGA1168. Thermal design power (TDP): 15 Watt. Memory support: DDR3. Passmark benchmark score: 2,069 points. Launch price was $69.
Processing Power
The Celeron M 585 packs 1 cores / 1 threads, while the Celeron 2955U offers 2 cores / 2 threads — the Celeron 2955U has 1 more core. Boost clocks reach 2.16 GHz on the Celeron M 585 versus 1.4 GHz on the Celeron 2955U — a 42.7% clock advantage for the Celeron M 585. The Celeron M 585 uses the Merom (2006−2008) architecture (65 nm), while the Celeron 2955U uses Haswell (2013−2015) (22 nm). In PassMark, the Celeron M 585 scores 2,062 against the Celeron 2955U's 2,069 — a 0.3% lead for the Celeron 2955U.
| Feature | Celeron M 585 | Celeron 2955U |
|---|---|---|
| Cores / Threads | 1 / 1 | 2 / 2+100% |
| Boost Clock | 2.16 GHz+54% | 1.4 GHz |
| Base Clock | — | 1.4 GHz |
| L3 Cache | — | 2 MB (total) |
| L2 Cache | 1 MB+300% | 256K (per core) |
| Process | 65 nm | 22 nm-66% |
| Architecture | Merom (2006−2008) | Haswell (2013−2015) |
| PassMark | 2,062 | 2,069 |
Memory & Platform
The Celeron M 585 uses the PGA478 socket (PCIe 1.1), while the Celeron 2955U uses FCBGA1168 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 800 on the Celeron M 585 versus DDR3L-1600 on the Celeron 2955U — the Celeron M 585 supports 198.5% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron 2955U supports up to 16 GB of RAM compared to 4 — 120% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 0 (Celeron M 585) vs 10 (Celeron 2955U) — the Celeron 2955U offers 10 more lanes for additional GPUs or NVMe drives. Chipset compatibility: GL40,GM45 (Celeron M 585) and Wildcat Point-LP (Celeron 2955U).
| Feature | Celeron M 585 | Celeron 2955U |
|---|---|---|
| Socket | PGA478 | FCBGA1168 |
| PCIe Generation | PCIe 1.1 | PCIe 3.0+173% |
| Max RAM Speed | 800+26567% | DDR3L-1600 |
| Max RAM Capacity | 4 | 16 GB+419430300% |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 0 | 10 |
Advanced Features
Neither processor supports overclocking. Virtualization support: false (Celeron M 585) vs VT-x (Celeron 2955U). The Celeron 2955U includes integrated graphics (HD Graphics (Haswell)), while the Celeron M 585 requires a dedicated GPU. Primary use case: Celeron 2955U targets Budget. Direct competitor: Celeron M 585 rivals Mobile Sempron SI-40; Celeron 2955U rivals Pentium 2117U.
| Feature | Celeron M 585 | Celeron 2955U |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | None | HD Graphics (Haswell) |
| Unlocked | No | No |
| AVX-512 | No | No |
| Virtualization | false | VT-x |
| Target Use | — | Budget |
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