AMD Ryzen 5 7645HX vs Intel Core i7-12800HX Comparison

FAQ

Q: Which processor has the higher average benchmark score?

A: The Intel Core i7-12800HX averages 33,875 across all benchmarks, while the AMD Ryzen 5 7645HX sits at 33,668. That is a 0.6% gap, with Intel ahead. Both chips land in the 84th percentile of all CPUs tested.

Q: How do the two compare in multi-threaded Cinebench workloads?

A: Intel dominates heavily. In Cinebench R23 multi-core, the i7-12800HX scores 22,456 versus 13,985 for the Ryzen 5 7645HX — a 60.6% advantage. The gap is slightly smaller in R15 multi-core, where Intel leads 3,383 to 2,276, a 48.6% margin.

Q: Does the AMD chip win any benchmark categories?

A: Yes, four of the fifteen head-to-head tests. The Ryzen 5 7645HX wins Cinebench R15 single-core (289 vs 260, a 10% edge), PassMark single-thread (3,907 vs 3,711, a 5% edge), and PassMark find prime numbers (178 vs 108, a 39.3% advantage). It also edges Intel in Cinebench R23 single-core, but only by 0.2% (1,809 vs 1,812 — a statistical tie).

Q: What is the core and thread count difference?

A: The Intel Core i7-12800HX has 16 cores and 24 threads. The AMD Ryzen 5 7645HX has 6 cores and 12 threads. That 10-core and 12-thread gap explains most of Intel's multi-threaded victories.

Q: Which processor supports ECC memory?

A: Only the AMD Ryzen 5 7645HX supports ECC memory. The Intel part does not. Both run dual-channel memory, but Intel supports DDR4 and DDR5, while AMD is DDR5-only.

Q: What is the process node difference?

A: Intel is built on a 10 nm process at Intel's foundry, with a die size of 215 mm². AMD uses TSMC's 5 nm node, with a die size of 71 mm² and 6,570 million transistors. The AMD chip is physically much smaller and denser.

Architecture Differences

The two processors come from fundamentally different design philosophies. Intel's Core i7-12800HX uses Alder Lake-HX, a hybrid architecture that pairs performance and efficiency cores. It has 16 cores and 24 threads, with a base clock of 2.00 GHz and a boost clock of 4.80 GHz. The cache layout is generous: 80 KB of L1 per core, 1.25 MB of L2 per core, and 25 MB of shared L3. This is a 10 nm part fabricated by Intel, with a die size of 215 mm².

AMD's Ryzen 5 7645HX is built on Zen 4, codenamed Dragon Range. It is a more traditional monolithic design with 6 cores and 12 threads. The base clock is notably higher at 4.00 GHz, and the boost clock reaches 5.00 GHz. Cache amounts are smaller per core — 64 KB L1 and 1 MB L2 — but the shared L3 is larger at 32 MB. TSMC's 5 nm process gives it a tiny 71 mm² die, with 6,570 million transistors. AMD's chip also supports ECC memory, which Intel's does not.

The platform differences extend to connectivity. Intel offers PCIe Gen 5 with 20 lanes (CPU only), while AMD provides PCIe Gen 5 with 28 lanes. Both use dual-channel memory, but AMD's memory bandwidth is rated at 83.2 GB/s, while Intel's is not specified in the data. Integrated graphics differ too: Intel has UHD Graphics 770, AMD has Radeon 610M.

Power envelopes are distinct. Intel's TDP is 55 W, AMD's is 45 W. Intel's multiplier is unlocked, enabling overclocking; AMD's is locked. Intel launched on May 9, 2022, with a launch MSRP of $457. AMD released on January 3, 2023, with no launch MSRP listed. Both are currently marked as Active production.

The Verdict

The data paints a clear picture for multi-threaded productivity. The Intel Core i7-12800HX is the outright winner in nearly every parallel workload. It leads by 60.6% in Cinebench R23 multi-core, 48.6% in R15 multi-core, and 42% in PassMark integer math. Floating-point math is even more lopsided, with Intel ahead 68.3%. Data compression favors Intel by 28.2%, encryption by 22.7%, and random string sorting by 23.3%. PassMark multithread shows a 19.3% Intel edge. The sheer core count advantage — 16 versus 6 — is insurmountable for AMD in these tests.

The Ryzen 5 7645HX is not without merit. It wins the single-thread contest in PassMark by 5%, and it is 10% faster in Cinebench R15 single-core. Prime number finding is a standout: AMD beats Intel by 39.3%. For workloads that are lightly threaded or rely on per-core integer throughput, the AMD chip is the better choice.

The overall average benchmark scores are nearly identical — 33,875 for Intel versus 33,668 for AMD — meaning the two chips are peers in aggregate performance. The Intel wins 11 head-to-head tests; AMD wins 4. But the nature of those wins matters. Intel's victories are often massive, while AMD's are mostly narrow or in niche workloads.

Pick the Intel Core i7-12800HX if your tasks scale with cores: rendering, video encoding, compilation, or heavy multitasking. Pick the AMD Ryzen 5 7645HX if you prioritize single-thread responsiveness, ECC memory support, or run prime-number-heavy algorithms. The average user will likely see little difference in day-to-day use, but the benchmark data favors Intel for serious parallel work.

Specification Differences

| Field | Intel Core i7-12800HX | AMD Ryzen 5 7645HX |

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

| Cores | 16 | 6 |

| Threads | 24 | 12 |

| Base Clock | 2.00 GHz | 4.00 GHz |

| Boost Clock | 4.80 GHz | 5.00 GHz |

| TDP | 55 W | 45 W |

| Socket | Intel BGA 1964 | AMD Socket FL1 |

| Architecture | Alder Lake | Zen 4 |

| Process Node | 10 nm (Intel) | 5 nm (TSMC) |

| Die Size | 215 mm² | 71 mm² |

| Transistors | Not specified | 6,570 million |

| L1 Cache | 80 KB per core | 64 KB per core |

| L2 Cache | 1.25 MB per core | 1 MB per core |

| L3 Cache | 25 MB shared | 32 MB shared |

| Memory Support | DDR4, DDR5 | DDR5 |

| Memory Bandwidth | Not specified | 83.2 GB/s |

| ECC Memory | No | Yes |

| PCIe | Gen 5, 20 Lanes | Gen 5, 28 Lanes |

| Integrated Graphics | UHD Graphics 770 | Radeon 610M |

| Multiplier | Unlocked | Locked |

| Launch MSRP | $457 | Not specified |

| Release Date | 2022-05-09 | 2023-01-03 |

Head-to-Head Benchmarks

The Intel Core i7-12800HX wins 11 of the 15 head-to-head tests, often by wide margins. The largest single victory is in PassMark floating-point math, where Intel scores 82,122 against AMD's 48,798 — a 68.3% lead. This is a direct consequence of the core count disparity; floating-point workloads scale almost linearly with parallel resources.

Cinebench R23 multi-core tells a similar story. Intel's 22,456 versus AMD's 13,985 is a 60.6% gap. R15 multi-core shows 3,383 versus 2,276, a 48.6% difference. PassMark integer math follows with 109,968 versus 77,432, a 42% edge. Data compression is 387,535 versus 302,256 (28.2% ahead), and data encryption is 21,972 versus 17,900 (22.7% ahead). Random string sorting adds another Intel win: 42,453 versus 34,434, up 23.3%. PassMark multithread is 31,585 versus 26,476, a 19.3% lead, and PassMark physics is 1,743 versus 1,497, up 16.4%. Even extended instructions favor Intel, though narrowly: 23,760 versus 22,969, just 3.4% ahead.

The AMD Ryzen 5 7645HX takes the remaining four tests. The most decisive is PassMark find prime numbers, where AMD scores 178 versus Intel's 108 — a 39.3% advantage. This is an interesting result, suggesting AMD's per-core integer throughput is superior in this specific workload. Cinebench R15 single-core goes to AMD by 10% (289 versus 260). PassMark single-thread is 3,907 versus 3,711, a 5% edge. The closest contest is Cinebench R23 single-core: 1,809 versus 1,812, a 0.2% difference that technically goes to Intel but is effectively a tie.

The pattern is consistent. Intel wins every multi-threaded test, often by double-digit percentages. AMD wins the single-thread tests and the prime-number workload. If your benchmark suite is dominated by parallel tasks, the i7-12800HX is the clear pick. If single-thread performance or prime-number operations matter most, the Ryzen 5 7645HX holds the edge. The overall averages are within 0.6% of each other, but the distribution of wins strongly favors Intel for general productivity.