AMD Ryzen 9 7900X vs Intel Core Ultra 5 245K Comparison

The Intel Core Ultra 5 245K and AMD Ryzen 9 7900X represent two distinct philosophies in desktop computing. The data shows a clear split: AMD’s 12-core, 24-thread Zen 4 chip dominates heavily threaded workloads, while Intel’s 14-core, 14-thread Arrow Lake part counters with significant single-thread and specialized math victories. With 9 benchmark wins for the Ryzen and 6 for the Core Ultra, the choice hinges entirely on the intended application mix.

Where Each One Wins

The AMD Ryzen 9 7900X is the clear victor in productivity and content-creation tasks that scale with thread count. Its 24 threads versus Intel’s 14 threads provide a massive advantage in multi-core rendering, compression, and encryption workloads. The largest margin comes in PassMark integer math, where AMD leads by 41.8%, followed by data compression at 27.5% and random string sorting at 26.2%. For users running video encoding, 3D rendering, or database operations, the Ryzen 9 7900X is the data-backed choice.

The Intel Core Ultra 5 245K wins in single-threaded performance and specific math operations. It leads in PassMark single-thread by 11.2% and Cinebench R23 single-core by 5.7%. More interestingly, it wins decisively in floating-point math (25.7% ahead) and prime number finding (6.7% ahead), suggesting a stronger FPU pipeline or better vector handling for certain scientific workloads. The Intel part also edges out the AMD in physics calculations, though by a razor-thin 0.7%. For legacy single-threaded applications or specific scientific simulations, Intel’s architecture holds the advantage.

Architecture Differences

The two processors are built on fundamentally different design paradigms. Intel’s Arrow Lake-S uses a 3 nm process from TSMC, while AMD’s Raphael employs a 5 nm node from the same foundry. The Intel chip integrates 17,800 million transistors on a 243 mm² die, compared to AMD’s 13,140 million spread across two 71 mm² chiplets. This explains why the Ryzen has a lower transistor count but uses a more mature, likely cheaper process.

Core configuration tells the story: Intel offers 14 cores and 14 threads (no hyperthreading), while AMD provides 12 cores and 24 threads (SMT enabled). Cache hierarchies diverge sharply. Intel allocates 192 KB L1 and 3 MB L2 per core, with 24 MB shared L3. AMD uses 64 KB L1 and 1 MB L2 per core, but a massive 64 MB shared L3. The larger AMD L3 cache likely benefits its compression and integer workloads, while Intel’s larger per-core L2 helps with floating-point and single-thread performance.

Memory bandwidth also differs: Intel supports 102.4 GB/s versus AMD’s 83.2 GB/s, though both are dual-channel DDR5. Both support ECC memory. PCIe lanes favor AMD at 24 Gen 5 lanes versus Intel’s 20. Integrated graphics differ: Intel uses Arc Xe-LPG with 64 EU, while AMD includes basic Radeon Graphics. TDP ratings show Intel at 125W versus AMD’s 170W, suggesting better efficiency per watt for Intel despite the process disadvantage.

Head-to-Head Benchmarks

The Cinebench results reveal the core count impact. In R15 multi-core, AMD scores 4820.5 versus Intel’s 3850, a 20.1% deficit for Intel. R23 multi-core shows a similar trend: AMD at 29300 versus Intel’s 25066, a 14.5% gap. But single-core R23 flips the script: Intel wins 2132 to 2016.5, a 5.7% margin. This suggests Intel’s per-core IPC is superior, but AMD’s SMT and additional threads overwhelm it in multi-threaded tests.

PassMark integer math is AMD’s biggest win: 169273 versus 98524, a 41.8% blowout. This workload likely benefits from AMD’s 24 threads and larger L3. Data compression follows at 632505 versus 458817, a 27.5% advantage. Encryption shows AMD ahead by 10.7% (37263 vs 33286). Random string sorting favors AMD by 26.2% (74658 vs 55098). Extended instructions show AMD ahead by 21% (47619 vs 37617). Multi-thread overall: AMD leads 51406 to 43047, a 16.3% gap.

Intel’s counter-attacks are concentrated. Floating-point math: Intel wins 130678 to 103952, a 25.7% lead — this is remarkable given AMD’s multi-core advantage. Prime numbers: Intel wins 414 to 388, a 6.7% edge. Physics: Intel wins 3081 to 3060, just 0.7%. Single-thread: Intel wins 4714 to 4238, an 11.2% margin. These results indicate Intel’s architecture is optimized for scalar and floating-point operations, while AMD excels at parallel integer tasks.

FAQ

Q: Which CPU is faster in single-threaded performance?

A: The Intel Core Ultra 5 245K wins PassMark single-thread (4714 vs 4238, an 11.2% lead) and Cinebench R23 single-core (2132 vs 2016.5, a 5.7% lead). The data clearly favors Intel for single-thread tasks.

Q: Does the AMD Ryzen 9 7900X dominate all multi-core tests?

A: Not all. AMD wins Cinebench R15 multi-core (4820.5 vs 3850), R23 multi-core (29300 vs 25066), and PassMark multi-thread (51406 vs 43047). However, Intel wins PassMark floating-point math (130678 vs 103952) and prime numbers (414 vs 388), showing AMD’s multi-core advantage is workload-specific.

Q: Which CPU has better memory bandwidth?

A: Intel supports 102.4 GB/s versus AMD’s 83.2 GB/s, despite both using dual-channel DDR5. Intel’s higher bandwidth may contribute to its floating-point and single-thread wins.

Q: How do the core counts compare?

A: Intel has 14 cores and 14 threads (no hyperthreading), while AMD has 12 cores and 24 threads (SMT enabled). AMD’s thread advantage is the primary driver of its multi-thread benchmark wins.

Q: Which CPU is more efficient per watt?

A: The Intel chip has a TDP of 125W versus AMD’s 170W. Given Intel’s single-thread wins and lower TDP, the data suggests better power efficiency, though no direct power consumption benchmarks are provided.

Q: Are both CPUs unlocked for overclocking?

A: Yes, both have multiplier unlocked status. Intel’s base clock is 4.20 GHz with a 5.20 GHz boost, while AMD’s is 4.70 GHz base and 5.60 GHz boost.

The Verdict

Data-driven selection depends on workload priority. For multi-threaded rendering, compression, encryption, and integer-heavy computing, the AMD Ryzen 9 7900X is the unambiguous winner. Its 24 threads deliver 20.1% better Cinebench R15 multi-core and 41.8% better integer math, making it the superior choice for video editing, 3D rendering, and server-like tasks. The 64 MB L3 cache and dual-chiplet design clearly pay off in these scenarios.

For single-threaded applications, scientific floating-point math, and legacy software, the Intel Core Ultra 5 245K is superior. Its 11.2% single-thread lead and 25.7% floating-point advantage make it ideal for older games, engineering simulations, and financial modeling that rely on scalar performance. The 125W TDP also suggests lower operating costs, though no thermal data is provided. The Intel chip’s 6 benchmark wins are concentrated in precisely the areas where per-core efficiency matters most.

The 91st percentile ranking for both CPUs against all processors confirms they are both high-end parts. However, the nearest rivals tell different stories: Intel’s closest competitor is the AMD Ryzen 9 9900X3D (1.3% ahead), while AMD’s is the Intel Xeon Phi 7290 (0.3% behind). This suggests Intel sits at the edge of its performance tier, while AMD comfortably matches server-class parts. Choose Intel for precision single-thread work; choose AMD for raw parallel throughput.

Specification Differences

| Specification | Intel Core Ultra 5 245K | AMD Ryzen 9 7900X |

|---|---|---|

| Cores | 14 | 12 |

| Threads | 14 | 24 |

| Base Clock | 4.20 GHz | 4.70 GHz |

| Boost Clock | 5.20 GHz | 5.60 GHz |

| TDP | 125 W | 170 W |

| Socket | Intel Socket 1851 | AMD Socket AM5 |

| Architecture | Arrow Lake | Zen 4 |

| Codename | Arrow Lake-S | Raphael |

| Process Node | 3 nm | 5 nm |

| Transistors | 17,800 million | 13,140 million |

| Die Size | 243 mm² | 2x 71 mm² |

| L1 Cache | 192 KB (per core) | 64 KB (per core) |

| L2 Cache | 3 MB (per core) | 1 MB (per core) |

| L3 Cache | 24 MB (shared) | 64 MB (shared) |

| Memory Bandwidth | 102.4 GB/s | 83.2 GB/s |

| PCIe | Gen 5, 20 Lanes | Gen 5, 24 Lanes |

| Integrated Graphics | Arc Xe-LPG 64EU | Radeon Graphics |

| Release Date | 2024-10-23 | 2022-09-26 |

| Launch MSRP | $319 | $549 |