CPU
GPU
Celeron G1840T
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 G1840T is positioned at rank 525 and the A6-6420K is on rank 656, so the Celeron G1840T offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Celeron G1840T
Performance Per Dollar A6-6420K
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Celeron G1840T | A6-6420K |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($10) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Haswell (2013−2015) / 22 nm) | 🛑 Legacy (Richland (2013−2014) / 32 nm) |
💎 Value Proposition
| Insight | Celeron G1840T | A6-6420K |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($10) | ✅ 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 G1840T and A6-6420K
Celeron G1840T
The Celeron G1840T 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 2.5 GHz, with boost up to 2.5 GHz. L3 cache: 3 MB (total). L2 cache: 256 kB (per core). Built on 22 nm process technology. Socket: LGA1150. Thermal design power (TDP): 35 Watt. Memory support: DDR3. Passmark benchmark score: 1,576 points. Launch price was $69.
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 G1840T and A6-6420K share an identical 2-core/2-thread configuration. Boost clocks reach 2.5 GHz on the Celeron G1840T versus 4.2 GHz on the A6-6420K — a 50.7% clock advantage for the A6-6420K (base: 2.5 GHz vs 4 GHz). The Celeron G1840T uses the Haswell (2013−2015) architecture (22 nm), while the A6-6420K uses Richland (2013−2014) (32 nm). In PassMark, the Celeron G1840T scores 1,576 against the A6-6420K's 1,571 — a 0.3% lead for the Celeron G1840T.
| Feature | Celeron G1840T | A6-6420K |
|---|---|---|
| Cores / Threads | 2 / 2 | 2 / 2 |
| Boost Clock | 2.5 GHz | 4.2 GHz+68% |
| Base Clock | 2.5 GHz | 4 GHz+60% |
| L3 Cache | 3 MB (total) | — |
| L2 Cache | 256 kB (per core) | 1024 kB+300% |
| Process | 22 nm-31% | 32 nm |
| Architecture | Haswell (2013−2015) | Richland (2013−2014) |
| PassMark | 1,576 | 1,571 |
Memory & Platform
The Celeron G1840T uses the LGA1150 socket (PCIe 3.0), while the A6-6420K uses FM2 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1333 on the Celeron G1840T versus 1866 on the A6-6420K — the A6-6420K supports 199.4% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 32 GB of RAM. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes. Chipset compatibility: H81,B85,H87,Z87,H97,Z97 (Celeron G1840T) and FM2 (A6-6420K).
| Feature | Celeron G1840T | A6-6420K |
|---|---|---|
| Socket | LGA1150 | FM2 |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
| Max RAM Speed | DDR3-1333 | 1866+62100% |
| Max RAM Capacity | 32 GB+104857500% | 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. Virtualization support: VT-x (Celeron G1840T) vs true (A6-6420K). Both include integrated graphics — HD Graphics (Haswell) (Celeron G1840T) and Radeon HD 8470D (A6-6420K) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: Celeron G1840T targets Budget. Direct competitor: Celeron G1840T rivals Pentium G3240T; A6-6420K rivals Pentium G3258.
| Feature | Celeron G1840T | A6-6420K |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | HD Graphics (Haswell) | Radeon HD 8470D |
| Unlocked | No | Yes |
| AVX-512 | No | No |
| Virtualization | VT-x | true |
| Target Use | Budget | — |
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