Celeron 4305U vs A6-6420K
Celeron 4305U
A6-6420K
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 4305U is positioned at rank 109 and the A6-6420K is on rank 656, so the Celeron 4305U offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Celeron 4305U
Performance Per Dollar A6-6420K
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Celeron 4305U | A6-6420K |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($107) | ✅ More affordable ($0) |
| Longevity | ✨ Modern (Whiskey Lake-U (2018−2019) / 14 nm) | 🛑 Legacy (Richland (2013−2014) / 32 nm) |
💎 Value Proposition
| Insight | Celeron 4305U | A6-6420K |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($107) | ✅ 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 Celeron 4305U and A6-6420K
Celeron 4305U
The Celeron 4305U is manufactured by Intel. It was released in 16 April 2019 (6 years ago). It is based on the Whiskey Lake-U (2018−2019) architecture. It features 2 cores and 2 threads. Base frequency is 2.2 GHz, with boost up to 2.2 GHz. L3 cache: 2 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: FCBGA1528. Thermal design power (TDP): 15 Watt. Memory support: DDR4-2133, LPDDR3-1866. Passmark benchmark score: 1,562 points. Launch price was $107.
A6-6420K
The A6-6420K is manufactured by AMD. It was released in 2014-01-01. It is based on the Richland (2013−2014) architecture. It features 2 cores and 2 threads. Base frequency is 4 GHz, with boost up to 4.2 GHz. L2 cache: 1024 kB. Built on 32 nm process technology. Socket: FM2. Thermal design power (TDP): 65 Watt. Memory support: DDR3-1866. Passmark benchmark score: 1,571 points. Launch price was $70.
Processing Power
Both the Celeron 4305U and A6-6420K share an identical 2-core/2-thread configuration. Boost clocks reach 2.2 GHz on the Celeron 4305U versus 4.2 GHz on the A6-6420K — a 62.5% clock advantage for the A6-6420K (base: 2.2 GHz vs 4 GHz). The Celeron 4305U uses the Whiskey Lake-U (2018−2019) architecture (14 nm), while the A6-6420K uses Richland (2013−2014) (32 nm). In PassMark, the Celeron 4305U scores 1,562 against the A6-6420K's 1,571 — a 0.6% lead for the A6-6420K.
| Feature | Celeron 4305U | A6-6420K |
|---|---|---|
| Cores / Threads | 2 / 2 | 2 / 2 |
| Boost Clock | 2.2 GHz | 4.2 GHz+91% |
| Base Clock | 2.2 GHz | 4 GHz+82% |
| L3 Cache | 2 MB (total) | — |
| L2 Cache | 256 kB (per core) | 1024 kB+300% |
| Process | 14 nm-56% | 32 nm |
| Architecture | Whiskey Lake-U (2018−2019) | Richland (2013−2014) |
| PassMark | 1,562 | 1,571 |
Memory & Platform
The Celeron 4305U uses the FCBGA1528 socket (PCIe 3.0), while the A6-6420K uses FM2 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 2133 on the Celeron 4305U versus 1866 on the A6-6420K — the Celeron 4305U supports 13.4% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Celeron 4305U supports up to 64 of RAM compared to 32 — 66.7% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes. Chipset compatibility: Whiskey Lake-U (Celeron 4305U) and FM2 (A6-6420K).
| Feature | Celeron 4305U | A6-6420K |
|---|---|---|
| Socket | FCBGA1528 | FM2 |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
| Max RAM Speed | 2133+14% | 1866 |
| Max RAM Capacity | 64+100% | 32 |
| RAM Channels | 2 | 2 |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 16 | 16 |
Advanced Features
Only the A6-6420K has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Both support true virtualization. Both include integrated graphics — Intel UHD Graphics 610 (Celeron 4305U) and Radeon HD 8470D (A6-6420K) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Celeron 4305U targets Budget. Direct competitor: Celeron 4305U rivals Pentium Gold 5405U; A6-6420K rivals Pentium G3258.
| Feature | Celeron 4305U | A6-6420K |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | Intel UHD Graphics 610 | Radeon HD 8470D |
| Unlocked | No | Yes |
| AVX-512 | No | No |
| Virtualization | true | true |
| Target Use | Budget | — |
Top Performing CPUs
The most powerful cpus ranked by PassMark CPU Mark benchmark scores.
You May Also Compare
Similar CPU comparisons based on Celeron 4305U and A6-6420K
