A6-5400K
Pentium U5400
A6-5400K vs Pentium U5400 Performance Spectrum
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.
A6-5400K vs Pentium U5400 FPS Benchmarks
Predicted gaming performance across popular games. Tested paired with GeForce RTX 5090 to isolate CPU performance.
Search any supported game below to compare 1080p FPS for both components.
Path of Exile 2
Counter-Strike 2
League of Legends
Valorant
Among Us
Apex Legends
ARC Raiders
Baldur's Gate 3
Call of Duty: Black Ops 6
A6-5400K vs Pentium U5400: Pros, Cons & Final Verdict
See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.
A6-5400K
2012Why buy it
- ✅+129.4% higher Geekbench single-core performance for gaming and desktop responsiveness.
- ✅Includes a boxed cooler (Yes), unlike Pentium U5400.
Trade-offs
- ❌Lower PassMark (1,279 vs 1,286).
- ❌261.1% higher power demand at 65W vs 18W.
Pentium U5400
2010Why buy it
- ✅+0.5% higher PassMark.
- ✅Draws 18W instead of 65W, a 47W reduction.
Trade-offs
- ❌Lower Geekbench single-core performance for gaming (170 vs 390).
- ❌Launch MSRP is still $289 MSRP, while A6-5400K mostly shows up through inconsistent older-market listings.
- ❌No boxed cooler included, unlike A6-5400K.
Quick Answers
So, is Pentium U5400 better than A6-5400K?
Which one is better for streaming, content creation, and heavy multitasking?
Which one is the smarter buy today, not just the cheaper CPU?
Which one is more future-proof for 2026 and beyond?
A6-5400K vs Pentium U5400 Technical Specifications
Side-by-side specs, architecture details, clocks, memory, power, and platform differences.
A6-5400K
The A6-5400K 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: 1,279 points. Launch price was $70.
Pentium U5400
The Pentium U5400 is manufactured by Intel. It was released in 2007-01-01. It is based on the Arrandale (2010−2011) architecture. It features 2 cores and 2 threads. Base frequency is 1.2 GHz, with boost up to 1.2 GHz. L3 cache: 3 MB (total). L2 cache: 256K (per core). Built on 32 nm process technology. Socket: BGA1288. Thermal design power (TDP): 18 Watt. Memory support: DDR3. Passmark benchmark score: 1,286 points. Launch price was $69.
Processing Power
Both the A6-5400K and Pentium U5400 share an identical 2-core/2-thread configuration. Boost clocks reach 3.8 GHz on the A6-5400K versus 1.2 GHz on the Pentium U5400 — a 104% clock advantage for the A6-5400K (base: 3.6 GHz vs 1.2 GHz). The A6-5400K uses the Trinity (2012−2013) architecture (32 nm), while the Pentium U5400 uses Arrandale (2010−2011) (32 nm). In PassMark, the A6-5400K scores 1,279 against the Pentium U5400's 1,286 — a 0.5% lead for the Pentium U5400. Geekbench 6 single-core — the metric most relevant to gaming — records 390 vs 170, a 78.6% lead for the A6-5400K that directly translates to higher frame rates. L3 cache: 0 kB on the A6-5400K vs 3 MB (total) on the Pentium U5400.
| Feature | A6-5400K | Pentium U5400 |
|---|---|---|
| Cores / Threads | 2 / 2 | 2 / 2 |
| Boost Clock | 3.8 GHz+217% | 1.2 GHz |
| Base Clock | 3.6 GHz+200% | 1.2 GHz |
| L3 Cache | 0 kB | 3 MB (total) |
| L2 Cache | 1 MB (per core) | 256K (per core)+25500% |
| Process | 32 nm | 32 nm |
| Architecture | Trinity (2012−2013) | Arrandale (2010−2011) |
| PassMark | 1,279 | 1,286 |
| Geekbench 6 Single | 390+129% | 170 |
| Geekbench 6 Multi | — | 300 |
Memory & Platform
The A6-5400K uses the FM2 socket (PCIe 2.0), while the Pentium U5400 uses BGA1288 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1866 on the A6-5400K versus DDR3-800 on the Pentium U5400 — the A6-5400K supports 133.3% faster memory, which can translate to measurable gains in memory-sensitive workloads. The A6-5400K supports up to 32 GB of RAM compared to 8 GB — 300% more capacity for professional workloads. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes. Chipset compatibility: A55,A75,A85X,A88X (A6-5400K) and HM55 (Pentium U5400).
| Feature | A6-5400K | Pentium U5400 |
|---|---|---|
| Socket | FM2 | BGA1288 |
| PCIe Generation | PCIe 2.0 | PCIe 2.0 |
| Max RAM Speed | DDR3-1866+133% | DDR3-800 |
| Max RAM Capacity | 32 GB+300% | 8 GB |
| RAM Channels | 2 | 2 |
| ECC Support | No | No |
| PCIe Lanes | 16 | 16 |
Advanced Features
Only the A6-5400K has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: AMD-V (A6-5400K) vs VT-x (Pentium U5400). Both include integrated graphics — Radeon HD 7540D (A6-5400K) and Intel HD Graphics (Ironlake) (Pentium U5400) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: A6-5400K targets Budget Desktop, Pentium U5400 targets Legacy Budget Laptop. Direct competitor: A6-5400K rivals Pentium G2120.
| Feature | A6-5400K | Pentium U5400 |
|---|---|---|
| Integrated GPU | Yes | Yes |
| IGPU Model | Radeon HD 7540D | Intel HD Graphics (Ironlake) |
| Unlocked | Yes | No |
| AVX-512 | No | No |
| Virtualization | AMD-V | VT-x |
| Target Use | Budget Desktop | Legacy Budget Laptop |
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