AMD Ryzen 5 PRO 7645 vs Intel Core i5-14400F Comparison

The AMD Ryzen 5 PRO 7645 and Intel Core i5-14400F are two 65-watt processors that land in the same performance neighborhood, with the AMD chip holding an average benchmark score of 32,446 versus Intel’s 32,279. That 0.5% overall gap is almost a tie, but the data reveals two distinct personalities: the Ryzen wins 11 of 17 direct head-to-head tests, while the Intel chip takes 6, often by larger margins in specific workloads.

Head-to-Head Benchmarks

The most dramatic result in this comparison is in the PassMark find prime numbers test. The AMD Ryzen 5 PRO 7645 scores 198, which is 130.2% higher than the Intel Core i5-14400F’s 86. This is an enormous advantage for the AMD chip, indicating a major strength in integer-heavy, single-threaded mathematical workloads. No other test comes close to this margin, making it the defining benchmark split between these two CPUs.

Another significant win for AMD comes in extended instructions, where the Ryzen 5 PRO 7645 scores 21,813 versus Intel’s 19,937, a 9.4% advantage. This suggests the Zen 4 architecture handles advanced instruction sets more efficiently. In random string sorting, the AMD chip also leads with 34,557 against 32,680, a 5.7% margin, and in physics calculations it wins 1,598 to 1,523, a 4.9% edge.

The Intel Core i5-14400F strikes back hard in floating point math, scoring 61,319 versus AMD’s 45,202, a massive 26.3% lead. This is the second-largest delta in the entire comparison and shows Intel’s clear dominance in FP-heavy tasks. Intel also wins integer math with 81,524 against 74,782, an 8.3% advantage, and data compression with 315,521 versus 286,298, a 9.3% margin.

In the Cinebench suite, the AMD chip wins every single test, though by razor-thin margins. In R15 multi-core, AMD scores 2,188 versus Intel’s 2,181, a 0.3% difference. The same 0.3% margin appears in R15 single-core (308 vs 307), R20 multi-core (9,118 vs 9,090), R20 single-core (1,287 vs 1,283), R23 multi-core (21,710 vs 21,645), and R23 single-core (3,065 vs 3,055). These results show the two CPUs are virtually identical in synthetic rendering workloads, with AMD holding a consistent but negligible edge.

In other PassMark tests, AMD wins multithread (25,489 vs 25,470, a 0.1% margin) and data encryption (16,657 vs 16,949, a 1.7% loss for AMD). Intel wins single-thread performance with 3,701 versus 3,652, a 1.3% advantage. The overall picture is a split: AMD dominates in prime number finding and extended instructions, Intel dominates in floating point and integer math, and they trade narrow wins elsewhere.

FAQ

Q: Which CPU has the higher single-thread score in PassMark?

A: The Intel Core i5-14400F scores 3,701 in PassMark single-thread, which is 1.3% higher than the AMD Ryzen 5 PRO 7645’s 3,652. This is one of the few tests where Intel leads in a single-core workload.

Q: How much faster is the AMD chip at finding prime numbers?

A: The AMD Ryzen 5 PRO 7645 scores 198 in the PassMark find prime numbers test, which is 130.2% higher than the Intel Core i5-14400F’s 86. This is the largest performance delta between the two processors in any benchmark.

Q: What is the difference in Cinebench R23 multi-core performance?

A: The AMD Ryzen 5 PRO 7645 scores 21,710 while the Intel Core i5-14400F scores 21,645, giving AMD a 0.3% advantage. The performance is effectively identical in this test.

Q: Which CPU is better for floating point math?

A: The Intel Core i5-14400F is significantly better, scoring 61,319 in PassMark floating point math versus AMD’s 45,202. That is a 26.3% lead for Intel, making it the clearest win for the Intel chip.

Q: Do both CPUs have the same average benchmark score?

A: No, the AMD Ryzen 5 PRO 7645 has an average benchmark score of 32,446, while the Intel Core i5-14400F has 32,279. The AMD chip is 0.5% ahead on average, and both sit in the 83rd percentile of all CPUs.

Q: Which processor wins more head-to-head tests?

A: The AMD Ryzen 5 PRO 7645 wins 11 of the 17 direct head-to-head benchmark comparisons, while the Intel Core i5-14400F wins 6. However, Intel’s wins often come with larger margins in its favored workloads.

The Verdict

The data points to a nuanced recommendation. If your work involves prime number calculations, extended instruction sets, or physics simulations, the AMD Ryzen 5 PRO 7645 is the clear choice. Its 130.2% lead in prime number finding and 9.4% lead in extended instructions are decisive advantages that no amount of tuning on the Intel side will close.

If your workload is dominated by floating point math, integer math, or data compression, the Intel Core i5-14400F is the better pick. The 26.3% lead in floating point performance is the single biggest margin in any test, and the 8.3% and 9.3% advantages in integer math and data compression, respectively, make it the stronger choice for number-crunching tasks.

For general productivity and rendering, the two are virtually tied. The Cinebench R23 multi-core scores differ by just 0.3%, which is within run-to-run variance. The AMD chip has a slight edge in multithread performance (0.1%) and physics (4.9%), but these are minor.

The Intel chip also offers a small single-thread advantage at 1.3%, which may matter for lightly-threaded applications. However, the AMD chip counters with a 5.7% lead in random string sorting, which is a common database and text-processing workload. Choose based on your specific application mix, not on the overall average.

Specification Differences

The core counts differ substantially. The AMD Ryzen 5 PRO 7645 has 6 cores and 12 threads, while the Intel Core i5-14400F has 10 cores and 16 threads. Despite Intel’s higher core count, the AMD chip matches or beats it in most benchmarks, indicating higher per-core efficiency.

Clock speeds also diverge. The AMD chip has a base clock of 3.80 GHz and a boost clock of 5.10 GHz. The Intel chip has a lower base clock of 2.50 GHz and a boost clock of 4.70 GHz. AMD’s higher clocks help explain its single-thread wins in Cinebench, though Intel still wins PassMark single-thread.

The sockets are incompatible. AMD uses Socket AM5, while Intel uses Socket 1700. This means the motherboard choice is the first major decision, as these CPUs cannot be swapped between platforms.

Memory support differs: the AMD chip supports DDR5 only, while the Intel chip supports both DDR4 and DDR5. Both use dual-channel memory, but only AMD lists a memory bandwidth of 83.2 GB/s. Both support ECC memory.

PCIe capabilities also differ. AMD offers Gen 5 with 24 lanes from the CPU, while Intel offers Gen 5 with 16 lanes. This gives AMD more expansion headroom for PCIe devices.

Architecture Differences

The AMD Ryzen 5 PRO 7645 is built on Zen 4 architecture with the Raphael codename, using a 5 nm process from TSMC. It has 6,570 million transistors on a 71 mm² die. The Intel Core i5-14400F uses Raptor Lake architecture with the Raptor Lake-R codename, on Intel’s 10 nm process, with a 215 mm² die size.

Cache configurations are notably different. AMD provides 64 KB of L1 cache per core, 1 MB of L2 cache per core, and 32 MB of shared L3 cache. Intel provides 80 KB of L1 per core, 1.25 MB of L2 per core, but only 20 MB of shared L3 cache. AMD’s larger L3 cache likely contributes to its wins in extended instructions and random string sorting.

The AMD chip includes integrated Radeon Graphics, while the Intel Core i5-14400F has no integrated graphics (N/A). This means the Intel chip requires a discrete GPU for display output, while the AMD chip can serve as a fallback.

AMD’s market segment is listed as Server/Workstation, while Intel’s is Desktop. The AMD chip is also part of the 7000 series with a 2023-06-12 release date, while Intel’s Core 14th Gen launched on 2024-01-07. Neither has an unlocked multiplier, so overclocking is not an option on either platform.

Where Each One Wins

The AMD Ryzen 5 PRO 7645 is the winner in computational mathematics and specialized workloads. The 130.2% advantage in prime number finding makes it the obvious choice for cryptography, number theory, or any prime-related computation. Its 9.4% lead in extended instructions also suits scientific computing and simulation code that leverages advanced CPU instructions.

AMD also wins in memory-heavy and sorting tasks. The 5.7% lead in random string sorting and the 4.9% lead in physics calculations suggest strengths in database operations and game physics. The Cinebench suite shows AMD ahead, though only by 0.3%, so it is not a meaningful win for rendering.

The Intel Core i5-14400F is the winner in raw arithmetic throughput. The 26.3% lead in floating point math is a massive advantage for financial modeling, scientific simulations that use FP math, and 3D rendering calculations. The 8.3% lead in integer math supports general number crunching and encryption workloads.

Intel also wins in data compression with a 9.3% margin, making it suitable for file archiving, backup software, and compression-heavy server tasks. The 1.3% single-thread advantage, while small, can benefit older applications that rely on one fast core.

The core count disparity matters in theory, but the benchmarks show AMD holding its own. The Intel chip’s 10 cores and 16 threads do not translate into multithread wins; AMD actually wins multithread by 0.1%. This suggests the AMD chip’s higher clocks and larger cache compensate for fewer physical cores in most real-world scenarios.