Pentium G645 vs A6-5400B
Pentium G645
A6-5400B
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 Pentium G645 is positioned at rank 838 and the A6-5400B is on rank 699, so the A6-5400B offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Pentium G645
Performance Per Dollar A6-5400B
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Pentium G645 | A6-5400B |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($15) | ✅ More affordable ($0) |
| Longevity | 🛑 Legacy (Sandy Bridge (2011−2013) / 32 nm) | 🛑 Legacy (Trinity (2012−2013) / 32 nm) |
💎 Value Proposition
| Insight | Pentium G645 | A6-5400B |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ❌ Lower cost efficiency |
| Upfront Cost | ⚠️ Higher cost ($15) | ✅ 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 Pentium G645 and A6-5400B
Pentium G645
The Pentium G645 is manufactured by Intel. It was released in 2 September 2012 (13 years ago). It is based on the Sandy Bridge (2011−2013) architecture. It features 2 cores and 2 threads. Base frequency is 2.9 GHz, with boost up to 2.9 GHz. L3 cache: 3 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA1155. Thermal design power (TDP): 65 Watt. Memory support: DDR3. Passmark benchmark score: 1,450 points. Launch price was $80.
A6-5400B
The A6-5400B is manufactured by AMD. It was released in 2014-01-01. It is based on the Trinity (2012−2013) architecture. It features 2 cores and 2 threads. Base frequency is 3.6 GHz, with boost up to 3.8 GHz. L3 cache: 0 kB. L2 cache: 1 MB (per core). Built on 32 nm process technology. Socket: FM2. Thermal design power (TDP): 65 Watt. Memory support: DDR3. Passmark benchmark score: 1,465 points. Launch price was $70.
Processing Power
Both the Pentium G645 and A6-5400B share an identical 2-core/2-thread configuration. Boost clocks reach 2.9 GHz on the Pentium G645 versus 3.8 GHz on the A6-5400B — a 26.9% clock advantage for the A6-5400B (base: 2.9 GHz vs 3.6 GHz). The Pentium G645 uses the Sandy Bridge (2011−2013) architecture (32 nm), while the A6-5400B uses Trinity (2012−2013) (32 nm). In PassMark, the Pentium G645 scores 1,450 against the A6-5400B's 1,465 — a 1% lead for the A6-5400B. L3 cache: 3 MB (total) on the Pentium G645 vs 0 kB on the A6-5400B.
| Feature | Pentium G645 | A6-5400B |
|---|---|---|
| Cores / Threads | 2 / 2 | 2 / 2 |
| Boost Clock | 2.9 GHz | 3.8 GHz+31% |
| Base Clock | 2.9 GHz | 3.6 GHz+24% |
| L3 Cache | 3 MB (total) | 0 kB |
| L2 Cache | 256 kB (per core) | 1 MB (per core)+300% |
| Process | 32 nm | 32 nm |
| Architecture | Sandy Bridge (2011−2013) | Trinity (2012−2013) |
| PassMark | 1,450 | 1,465+1% |
| Geekbench 6 Single | — | 380 |
Memory & Platform
The Pentium G645 uses the LGA1155 socket (PCIe 2.0), while the A6-5400B uses FM2 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Pentium G645 | A6-5400B |
|---|---|---|
| Socket | LGA1155 | FM2 |
| PCIe Generation | PCIe 2.0 | PCIe 2.0 |
| Max RAM Speed | — | DDR3-1866 |
| Max RAM Capacity | — | 32 GB |
| RAM Channels | — | 2 |
| ECC Support | — | ❌ |
| PCIe Lanes | — | 16 |
Advanced Features
Virtualization: not specified (Pentium G645) / AMD-V (A6-5400B). The A6-5400B includes integrated graphics (Radeon HD 7540D), while the Pentium G645 requires a dedicated GPU. Primary use case: A6-5400B targets Business Desktop. Direct competitor: A6-5400B rivals Pentium G2020.
| Feature | Pentium G645 | A6-5400B |
|---|---|---|
| Integrated GPU | — | Yes |
| IGPU Model | — | Radeon HD 7540D |
| Unlocked | — | No |
| AVX-512 | — | No |
| Virtualization | — | AMD-V |
| Target Use | — | Business Desktop |
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