AMD A8-6600K vs Intel Core i5-4250U Comparison

Head-to-Head Benchmarks

The recorded head-to-head data contains only two comparable benchmark results, and the Intel Core i5-4250U wins both decisively. In Geekbench multicore, the Intel part scores 1434 against the AMD A8-6600K's 1076, a 25% advantage. The single-core gap is even larger: Intel scores 742 versus AMD's 451, a 39.2% lead. These are not marginal differences; they represent a clear performance tier separation in both threaded and lightly threaded workloads.

The magnitude of the single-core deficit is particularly striking. A 39.2% delta means the AMD processor delivers barely over 60% of the Intel chip's per-core throughput in this workload. For applications that rely heavily on single-threaded performance, such as legacy software or lightly threaded games, this difference will be immediately noticeable. The multicore result, while narrower, still shows Intel ahead by a quarter, which is substantial given that the AMD part has twice the physical core count.

It is notably the benchmark database places both processors at the 20th percentile among all CPUs, meaning they are in the same overall performance bracket despite the lopsided head-to-head results. The average benchmark scores are also close: 764 for AMD and 756 for Intel. This apparent contradiction is explained by the fact that the AMD A8-6600K's average is derived from only two Geekbench scores, while the Intel Core i5-4250U has a broader benchmark profile that includes Cinebench R15, R20, and R23 results, which pull its average down relative to its Geekbench performance.

The nearest rival data reinforces the Intel part's standing. The Core i5-4250U sits within 0.2% of the Intel Core i3-5020U and 0.1% of the Intel Xeon E5450, and it is 0.2% ahead of the Intel Core i5-3230M. The AMD A8-6600K, by contrast, is 0.3% behind the Intel Core i7-3537U and 0.5% ahead of the Intel Core i3-3240. Neither chip dramatically outperforms its closest neighbors, but the Intel part's head-to-head dominance over AMD is unambiguous.

Architecture Differences

The two processors come from fundamentally different design philosophies. The AMD A8-6600K is a desktop part built on the Piledriver architecture, codenamed Richland, using a 32 nm process from GlobalFoundries. It packs 1,303 million transistors into a 246 mm² die. The Intel Core i5-4250U is a mobile processor on the Haswell architecture, fabricated by Intel on a 22 nm process, with 1,400 million transistors on a much smaller 118 mm² die. The smaller process node and denser transistor layout give Intel a significant efficiency advantage.

Core and thread counts differ substantially. AMD offers four physical cores and four threads, while Intel offers two physical cores and four threads via Hyper-Threading. Despite having half the physical cores, the Intel part still wins both benchmark comparisons, illustrating the per-core efficiency gap between Piledriver and Haswell designs.

Clock speeds tell a nuanced story. The AMD A8-6600K has a base clock of 3.90 GHz and a boost clock of 4.20 GHz. The Intel Core i5-4250U has a base clock of 1.30 GHz and a boost clock of 2.60 GHz. On paper, AMD's clocks are much higher, yet the actual performance is reversed. This is a textbook example of instructions-per-clock (IPC) differences: Haswell delivers far more work per clock cycle than Piledriver, allowing Intel to win with substantially lower clock speeds.

Cache hierarchies also differ. AMD has 192 KB of L1 cache and 4 MB of L2 cache, with no L3 cache. Intel has 64 KB of L1 cache per core, 256 KB of L2 cache per core, and 3 MB of shared L3 cache. The presence of an L3 cache on the Intel part is a notable architectural advantage for workloads with larger working sets.

Thermal design power (TDP) is where the divergence becomes extreme. The AMD A8-6600K is rated at 100 W, while the Intel Core i5-4250U is rated at just 15 W. This is a 85 W difference, and it fundamentally changes the deployment context. The AMD chip requires a desktop platform with active cooling and a substantial power supply, while the Intel chip is designed for thin-and-light laptops where heat dissipation is a primary constraint.

Memory support is similar in type: both support DDR3. AMD specifies dual-channel memory with 29.9 GB/s of bandwidth, while Intel does not list a memory bus or bandwidth figure in the database. Neither supports ECC memory. The AMD processor uses PCIe Gen 2, while the Intel part has no listed PCIe generation. Integrated graphics differ: AMD includes a Radeon HD 8570D, while Intel includes an HD 5000. The AMD part has an unlocked multiplier, indicating enthusiast overclocking potential, whereas the Intel part is locked.

The market segments are opposite: AMD is a desktop chip, Intel is a mobile chip. The AMD A8-6600K is end-of-life, while the Intel part has no production status listed. Both launched within days of each other in mid-2013, with AMD's release date on May 31 and Intel's on June 3.

The Verdict

From the recorded data, the Intel Core i5-4250U is the superior processor in every measured benchmark. It leads by 25% in multicore and 39.2% in single-core Geekbench tests. This is despite having two fewer physical cores, a much lower base clock, and a far lower TDP. The architectural efficiency of Haswell over Piledriver is the deciding factor.

The AMD A8-6600K does have a clear advantage in one area: raw core count and clock speed. For workloads that are explicitly optimized for many threads and are insensitive to per-core IPC, the four Piledriver cores can sometimes be preferable. However, the benchmark data does not reflect this advantage in any of the recorded tests. The Intel chip wins both available comparisons.

The TDP difference is not just a spec sheet curiosity. The 15 W Intel part is designed for fanless or low-noise mobile systems, while the 100 W AMD part is a desktop-only component. For anyone building a compact, power-efficient system, the Intel part is the only viable choice between these two. For anyone building a desktop with no power constraints, the AMD part is the only option since the Intel part is a mobile BGA chip.

The average benchmark scores and percentile rankings suggest these are broadly comparable processors in the overall CPU landscape. Both sit at the 20th percentile, and their average scores are within 8 points of each other (764 vs 756). This means that in the broader context of all CPUs, they occupy the same performance class. The head-to-head data just happens to favor Intel strongly in the specific tests recorded.

The nearest rival data shows that both chips are closely matched to similar-era Intel parts. The AMD A8-6600K is effectively tied with the Intel Core i7-3537U (0.3% behind) and the Intel Core i3-3240 (0.5% ahead). The Intel Core i5-4250U is effectively tied with the Intel Xeon E5450 (0.1% behind) and the Intel Core i3-5020U (0.2% behind). Neither processor dramatically outperforms its immediate competitors.

FAQ

Q: Which processor has a higher single-core Geekbench score?

A: The Intel Core i5-4250U scores 742, which is 39.2% higher than the AMD A8-6600K's 451.

Q: How many physical cores does each processor have?

A: The AMD A8-6600K has 4 physical cores and 4 threads. The Intel Core i5-4250U has 2 physical cores and 4 threads.

Q: What is the TDP difference between these two chips?

A: The AMD A8-6600K is rated at 100 W, while the Intel Core i5-4250U is rated at 15 W.

Q: Do both processors support the same memory type?

A: Yes, both support DDR3 memory. AMD specifies dual-channel support with 29.9 GB/s bandwidth, while Intel does not list a memory bandwidth figure.

Q: Which processor has an unlocked multiplier?

A: The AMD A8-6600K has an unlocked multiplier. The Intel Core i5-4250U does not.

Q: What is the process node for each chip?

A: The AMD A8-6600K uses a 32 nm process from GlobalFoundries. The Intel Core i5-4250U uses a 22 nm process from Intel.

Where Each One Wins

The Intel Core i5-4250U wins in every recorded benchmark category. Its 25% multicore lead and 39.2% single-core lead make it the clear choice for general-purpose computing, productivity applications, and any workload where per-thread throughput matters. The 15 W TDP makes it suitable for ultrabooks, thin laptops, and fanless designs where thermal management is critical. The presence of an L3 cache and smaller die size (118 mm²) also suggest better memory latency characteristics and manufacturing efficiency.

The AMD A8-6600K wins in scenarios not captured by these specific benchmarks. Its four physical cores can be advantageous for workloads that scale well with core count and do not depend on high single-thread performance. The unlocked multiplier opens the door for enthusiast overclocking, which can potentially narrow the performance gap in a desktop environment with adequate cooling. The Radeon HD 8570D integrated graphics may provide different driver-level behavior than Intel's HD 5000, though no graphics benchmarks are in the recorded data. The 100 W TDP is a non-issue for desktop users with standard power supplies.

For a desktop builder who values core count and overclocking headroom, the AMD A8-6600K is the only choice, as the Intel part is a mobile BGA chip that cannot be installed in a standard desktop socket. For a mobile user or anyone prioritizing power efficiency, the Intel Core i5-4250U is the only choice. The data does not support any scenario where the AMD part outperforms the Intel part in raw speed, but the platform constraints and use-case differences are decisive factors that the benchmarks alone cannot resolve.