AMD Ryzen 5 7520C vs Intel Core i5-9400T Comparison

The Intel Core i5-9400T and AMD Ryzen 5 7520C represent two distinct approaches to efficient x86 computing, separated by nearly five years of silicon evolution. The data shows a decisive sweep for the AMD processor across every benchmark test, with the Intel chip trailing consistently by roughly 6% in both single-threaded and multi-threaded workloads. However, the underlying specifications—6 cores versus 4 cores, 35W versus 15W TDP, and different memory architectures—paint a more nuanced picture of where each processor fits in the broader market landscape.

Head-to-Head Benchmarks

The benchmark results are unambiguous: the AMD Ryzen 5 7520C wins all six head-to-head tests, though the margins are remarkably narrow given the architectural differences. In Cinebench R15 multi-core, the AMD scores 741 against Intel's 695, a 6.2% advantage. The single-core test shows a similar gap, with AMD at 104 versus Intel's 97, representing a 6.7% lead. This pattern holds steady through the newer Cinebench versions—R20 multi-core gives AMD 3089 against 2896 (6.2% ahead), while R20 single-core shows AMD at 435 versus 408 (6.2% ahead).

The Cinebench R23 results reinforce this consistent performance delta. AMD's 7355 multi-core score eclipses Intel's 6896 by 6.2%, and the single-core gap is virtually identical at 6.3%, with AMD scoring 1038 against Intel's 973. Notably, the Intel processor's Geekbench scores (3969 multi-core, 1152 single-core) are not directly comparable to the AMD part, as the Ryzen 5 7520C lacks Geekbench data in this comparison set.

The average benchmark scores tell a similar story. The Ryzen 5 7520C posts an average score of 2127, while the Core i5-9400T edges slightly ahead at 2136—a 0.4% difference in Intel's favor. This apparent contradiction stems from the different benchmark suites included in each processor's average calculation. The i5-9400T's nearest rival list places the Ryzen 5 7520C at a 0.4% delta, while the Ryzen's own list shows the Intel part at -0.4%, confirming the near-identical overall performance.

Where Each One Wins

Based strictly on the benchmark data, the AMD Ryzen 5 7520C is the outright winner in every measured workload category. The 6.2-6.7% advantage across all Cinebench tests indicates that AMD's Zen 2 architecture delivers superior per-thread performance despite having two fewer physical cores. The Ryzen's 4.30 GHz boost clock, compared to Intel's 3.40 GHz, likely contributes to this consistent edge in both single-core and multi-core scenarios.

The Intel Core i5-9400T's theoretical advantage lies in its core count—6 cores versus 4—yet the benchmarks show this does not translate into real-world multi-threaded wins. The AMD processor's 8 threads (thanks to simultaneous multithreading) versus Intel's 6 threads narrows the core-count gap, while the higher clock speeds push AMD ahead in every rendering test. The Intel chip does, however, offer a broader PCIe footprint with 16 lanes versus AMD's 4 lanes, which could matter for desktop expansion. Its 9 MB of shared L3 cache also dwarfs AMD's 4 MB, though again, the benchmarks show this does not compensate for clock speed disadvantages.

Architecture Differences

The two processors come from fundamentally different design philosophies and eras. The Intel Core i5-9400T uses the Coffee Lake architecture on a 14 nm process, manufactured by Intel, while the AMD Ryzen 5 7520C employs Zen 2 (Mendocino) on a 6 nm node from TSMC. This process advantage gives AMD a significant efficiency lead, reflected in the 15W TDP versus Intel's 35W—a difference of 20W that has major implications for thermal design and battery life in mobile applications.

The core configurations differ markedly: Intel fields 6 cores and 6 threads, while AMD offers 4 cores and 8 threads. Clock speeds favor AMD substantially, with a 2.80 GHz base and 4.30 GHz boost versus Intel's 1.80 GHz base and 3.40 GHz boost. Cache hierarchies also diverge—both use 64 KB L1 per core, but AMD doubles the L2 to 512 KB per core against Intel's 256 KB, while Intel's 9 MB shared L3 more than doubles AMD's 4 MB shared cache.

Memory support creates another clear separation. Intel uses DDR4 with dual-channel access and 42.7 GB/s bandwidth, while AMD supports LPDDR5 with dual-channel access and 88.0 GB/s—more than double the bandwidth. The AMD part also has a notably smaller die size at 100 mm², reflecting its more advanced process node. Both integrate graphics, with Intel's UHD 630 against AMD's Radeon 610M, though no benchmark data exists in this pack to compare their graphical capabilities.

The platform targets differ sharply: the Intel chip uses Socket 1151 and is marked as a Desktop processor, while AMD uses Socket FT6 and is classified as Mobile. The Intel part is end-of-life with a release date in August 2018, whereas the AMD chip remains active with a May 2023 launch. Both lack support for ECC memory and have locked multipliers, but their PCIe configurations diverge significantly—Intel provides Gen 3 with 16 lanes, AMD only Gen 3 with 4 lanes, reflecting the mobile focus.

The Verdict

The data leads to a straightforward conclusion: the AMD Ryzen 5 7520C is the superior processor in every benchmark category measured. Its 6.2-6.7% advantage across all Cinebench versions, combined with a 15W TDP that is less than half of Intel's 35W, makes it the clear choice for efficiency-focused mobile workloads. The Ryzen's 4.30 GHz boost clock and 88.0 GB/s memory bandwidth deliver tangible performance benefits that outweigh Intel's advantages in core count and L3 cache size.

The Intel Core i5-9400T, despite its 6-core configuration, cannot overcome the clock speed deficit and older process technology. Its 16 PCIe lanes and desktop socket may appeal to users needing expansion capability, but the benchmark evidence shows no performance scenario where it beats the AMD part. The near-identical average benchmark scores (2136 vs 2127) suggest that in aggregate, these are closely matched chips, but the head-to-head data reveals a consistent AMD advantage.

For users prioritizing raw compute performance per watt, the Ryzen 5 7520C is the data-backed choice. For those requiring a desktop platform with greater PCIe connectivity, the i5-9400T offers that capability, though without any benchmark-verified performance benefit. The AMD processor's active production status and newer release date also suggest better long-term availability and support.

FAQ

Q: Which processor is faster in multi-threaded workloads?

A: The AMD Ryzen 5 7520C wins all three multi-core Cinebench tests, scoring 741 vs 695 in R15, 3089 vs 2896 in R20, and 7355 vs 6896 in R23—a consistent 6.2% advantage over the Intel Core i5-9400T.

Q: How do the single-core performances compare?

A: The AMD processor leads in every single-core test: 104 vs 97 in Cinebench R15 (6.7% ahead), 435 vs 408 in R20 (6.2% ahead), and 1038 vs 973 in R23 (6.3% ahead).

Q: What is the difference in power consumption?

A: The AMD Ryzen 5 7520C has a 15W TDP, while the Intel Core i5-9400T has a 35W TDP. This represents a 20W difference in thermal design power.

Q: Do the two processors support the same memory types?

A: No. The Intel chip supports DDR4 with 42.7 GB/s bandwidth, while the AMD chip supports LPDDR5 with 88.0 GB/s bandwidth—more than double the memory bandwidth.

Q: Which processor has more cores?

A: The Intel Core i5-9400T has 6 cores and 6 threads, while the AMD Ryzen 5 7520C has 4 cores and 8 threads. Despite having fewer cores, the AMD processor wins all multi-threaded benchmarks.

Q: Are these processors in the same performance class?

A: Yes. Their average benchmark scores are nearly identical—2136 for Intel and 2127 for AMD—with a 0.4% delta. However, the AMD chip wins every direct head-to-head test by roughly 6%.