CPU
GPU
Athlon II X4 635
Celeron J3455
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 Athlon II X4 635 is positioned at rank 1069 and the Celeron J3455 is on rank 994, so the Celeron J3455 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Athlon II X4 635
Performance Per Dollar Celeron J3455
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Athlon II X4 635 | Celeron J3455 |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($250) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Propus (2009−2011) / 45 nm) | 🛑 Legacy (Apollo Lake (2014−2016) / 14 nm) |
💎 Value Proposition
| Insight | Athlon II X4 635 | Celeron J3455 |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($250) | ✅ More affordable ($0) |
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 Athlon II X4 635 and Celeron J3455
Athlon II X4 635
The Athlon II X4 635 is manufactured by AMD. It was released in 25 January 2010 (15 years ago). It is based on the Propus (2009−2011) architecture. It features 4 cores and 4 threads. Base frequency is 2.9 GHz, with boost up to 2.9 GHz. L3 cache: 0 kB. L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 2,248 points. Launch price was $70.
Celeron J3455
The Celeron J3455 is manufactured by Intel. It was released in 30 August 2016 (9 years ago). It is based on the Apollo Lake (2014−2016) architecture. It features 4 cores and 4 threads. Base frequency is 1.5 GHz, with boost up to 2.3 GHz. L3 cache: 0 kB. L2 cache: 2 MB. Built on 14 nm process technology. Socket: FCBGA1296. Thermal design power (TDP): 10 Watt. Memory support: DDR3L/LPDDR3 up to 1866 MT/s; LPDDR4 up to 2400 MT/s. Passmark benchmark score: 2,247 points. Launch price was $107.
Processing Power
Both the Athlon II X4 635 and Celeron J3455 share an identical 4-core/4-thread configuration. Boost clocks reach 2.9 GHz on the Athlon II X4 635 versus 2.3 GHz on the Celeron J3455 — a 23.1% clock advantage for the Athlon II X4 635 (base: 2.9 GHz vs 1.5 GHz). The Athlon II X4 635 uses the Propus (2009−2011) architecture (45 nm), while the Celeron J3455 uses Apollo Lake (2014−2016) (14 nm). In PassMark, the Athlon II X4 635 scores 2,248 against the Celeron J3455's 2,247 — a 0% lead for the Athlon II X4 635. Geekbench 6 single-core — the metric most relevant to gaming — records 180 vs 450, a 85.7% lead for the Celeron J3455 that directly translates to higher frame rates. Multi-core Geekbench: 550 vs 850 (42.9% advantage for the Celeron J3455). Both processors carry 0 kB of L3 cache.
| Feature | Athlon II X4 635 | Celeron J3455 |
|---|---|---|
| Cores / Threads | 4 / 4 | 4 / 4 |
| Boost Clock | 2.9 GHz+26% | 2.3 GHz |
| Base Clock | 2.9 GHz+93% | 1.5 GHz |
| L3 Cache | 0 kB | 0 kB |
| L2 Cache | 512 kB (per core) | 2 MB+300% |
| Process | 45 nm | 14 nm-69% |
| Architecture | Propus (2009−2011) | Apollo Lake (2014−2016) |
| PassMark | 2,248 | 2,247 |
| Cinebench R23 Multi | 658 | — |
| Geekbench 6 Single | 180 | 450+150% |
| Geekbench 6 Multi | 550 | 850+55% |
Memory & Platform
The Athlon II X4 635 uses the AM3 socket (PCIe 2.0), while the Celeron J3455 uses FCBGA1296 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1333 / DDR2-1066 on the Athlon II X4 635 versus DDR4-2400 on the Celeron J3455 — the Celeron J3455 supports 28.6% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Athlon II X4 635 supports up to 16 GB of RAM compared to 8 GB — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Athlon II X4 635) vs 6 (Celeron J3455) — the Athlon II X4 635 offers 10 more lanes for additional GPUs or NVMe drives. Chipset compatibility: AMD 770,785G,790FX,880G,890FX,970,990FX (Athlon II X4 635) and N/A (SoC) (Celeron J3455).
| Feature | Athlon II X4 635 | Celeron J3455 |
|---|---|---|
| Socket | AM3 | FCBGA1296 |
| PCIe Generation | PCIe 2.0 | PCIe 3.0+50% |
| Max RAM Speed | DDR3-1333 / DDR2-1066 | DDR4-2400+33% |
| Max RAM Capacity | 16 GB+100% | 8 GB |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 16+167% | 6 |
Advanced Features
Only the Athlon II X4 635 has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: AMD-V (Athlon II X4 635) vs VT-x (Celeron J3455). The Celeron J3455 includes integrated graphics (HD Graphics 500), while the Athlon II X4 635 requires a dedicated GPU. Primary use case: Athlon II X4 635 targets Budget, Celeron J3455 targets Low Power. Direct competitor: Celeron J3455 rivals Pentium J4205.
| Feature | Athlon II X4 635 | Celeron J3455 |
|---|---|---|
| Integrated GPU | No | Yes |
| IGPU Model | — | HD Graphics 500 |
| Unlocked | Yes | No |
| AVX-512 | No | No |
| Virtualization | AMD-V | VT-x |
| Target Use | Budget | Low Power |
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