AMD Ryzen 5 PRO 8645HS vs Intel Core 3 305 Comparison

The AMD Ryzen 5 PRO 8645HS and Intel Core 3 305 are both 6-core mobile processors, but the benchmark data shows they serve very different performance tiers. The AMD chip wins 13 of the 17 recorded head-to-head comparisons, including every Cinebench test, while the Intel part claims 4 wins in specific PassMark workloads. The database places the AMD processor at the 82nd percentile among all CPUs, with an average benchmark score of 30,879, while the Intel processor sits at the 72nd percentile with an average score of 18,302. This is a significant gap in overall compute capability.

Where Each One Wins

The AMD Ryzen 5 PRO 8645HS dominates in heavily threaded workloads and raw computational throughput. Its win list includes all six Cinebench tests (R15, R20, and R23, both multi-core and single-core), plus PassMark data compression, data encryption, extended instructions, floating point math, integer math, multithread, and random string sorting. This is a processor built for sustained productivity, content creation, and any task that can use its 12 threads effectively.

The Intel Core 3 305 wins in four specific PassMark tests: find prime numbers, physics, single thread, and the duplicate singlethread test. The single-thread win is notable because it indicates the Intel core design, despite a much lower base clock, can edge ahead in lightly threaded, latency-sensitive tasks. The physics and prime number results suggest a different strength in specific algorithmic patterns, though the margins are small in two of those cases.

For practical use, the data indicates the AMD processor is the choice for compiling code, rendering, video encoding, and database work, where its multi-core scores are substantially higher. The Intel processor shows a narrow advantage in single-threaded PassMark and a 2% lead in physics, which is negligible for most users. The Intel chip's 15 TDP rating suggests it is aimed at fanless or ultra-light designs, but its performance profile is clearly lower.

Architecture Differences

The AMD Ryzen 5 PRO 8645HS uses the Zen 4 architecture on a 4 nm TSMC process, with a codename of Hawk Point. It integrates 25,000 million transistors on a 178 mm² die. The Intel Core 3 305 uses a 3 nm Intel process with the Wildcat Lake codename, though the database lists no architecture name, transistor count, or die size for it.

Core and thread configurations differ sharply. The AMD chip has 6 cores and 12 threads, while the Intel chip has 6 cores and 6 threads. This means the AMD processor can handle twice as many concurrent threads, which directly explains its large leads in multi-threaded benchmarks.

Cache layouts also diverge. The AMD processor provides 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3 cache. The Intel processor has a total of 192 KB of L1, 2.5 MB of L2, and 6 MB of shared L3. The AMD chip's larger L3 cache and per-core L2 give it an advantage in data reuse and memory-bound workloads.

Memory support is another differentiator. The AMD chip supports DDR5 with a dual-channel bus and a memory bandwidth of 89.6 GB/s, plus ECC memory support. The Intel chip supports DDR5 and LPDDR5X but is limited to a single-channel bus with 59.7 GB/s of bandwidth and no ECC support. The AMD processor also offers PCIe Gen 4 with 20 lanes, while the Intel processor offers PCIe Gen 4 with only 6 lanes, a major difference for expandability.

Clock speeds are starkly different. The AMD chip has a base clock of 4.30 GHz and a boost clock of 5.00 GHz. The Intel chip has a base clock of 1.50 GHz and a boost clock of 4.30 GHz. The AMD chip's high base clock explains its consistent performance in all tests, while the Intel chip relies on boosting to reach competitive single-thread scores.

The integrated graphics differ: the AMD chip uses Radeon 760M, while the Intel chip uses Intel Xe3 Graphics with 1 Xe core. The database does not include graphics benchmarks, so no performance comparison is possible here.

Head-to-Head Benchmarks

The most decisive wins for the AMD Ryzen 5 PRO 8645HS come in Cinebench tests. In Cinebench R23 multi-core, the AMD chip scores 19,742 against 13,123 for the Intel chip, a 50.4% lead. In R23 single-core, the AMD chip scores 2,787 against 1,852, a 50.5% lead. The pattern holds across R15 and R20 with deltas of 50.5% and 50.4% respectively.

PassMark integer math shows the largest single gap: the AMD chip scores 72,740 versus 32,295 for the Intel chip, a 125.2% advantage. Random string sorting also shows a massive delta, with the AMD chip at 35,472 against 17,623, a 101.3% lead. Data compression follows at 81% ahead, and data encryption is 57.8% ahead.

The Intel Core 3 305 wins are narrower. In PassMark find prime numbers, the Intel chip scores 115 against 73 for the AMD chip, a 36.5% lead in favor of Intel. PassMark physics shows a 2% lead for Intel (1,233 versus 1,208). In the two single-thread tests, the Intel chip scores 3,977 versus 3,858, a 3% lead. These wins do not offset the scale of AMD's victories in the other 13 tests.

The average benchmark score comparison reinforces the gap: the AMD chip averages 30,879, which is 68.7% higher than the Intel chip's 18,302. The AMD chip's nearest rivals include the AMD Ryzen 7 8700F at 30,746 (0.4% lower) and the Intel Core i7-12700F at 31,081 (0.6% higher), showing it competes with higher-tier desktop and mobile parts. The Intel Core 3 305 sits near the Intel Core i3-14100 at 18,318 (0.1% higher) and the Intel Core 5 330 at 18,345 (0.2% higher), placing it in the entry-level mobile segment.

FAQ

Q: Which processor has more threads?

A: The AMD Ryzen 5 PRO 8645HS has 12 threads with 6 cores, while the Intel Core 3 305 has 6 threads with 6 cores. The AMD chip can process twice as many threads simultaneously.

Q: What is the largest benchmark gap between the two?

A: In PassMark integer math, the AMD Ryzen 5 PRO 8645HS scores 72,740 versus 32,295 for the Intel Core 3 305, a 125.2% lead. The next largest gap is in random string sorting at 101.3%.

Q: Does the Intel Core 3 305 win any benchmark by a large margin?

A: Yes, in PassMark find prime numbers, the Intel chip scores 115 versus 73 for the AMD chip, a 36.5% lead. This is its only win with a double-digit margin.

Q: Which processor has higher memory bandwidth?

A: The AMD Ryzen 5 PRO 8645HS has 89.6 GB/s of memory bandwidth with a dual-channel bus, while the Intel Core 3 305 has 59.7 GB/s with a single-channel bus.

Q: What are the TDP ratings?

A: The AMD Ryzen 5 PRO 8645HS has a TDP of 45 watts, while the Intel Core 3 305 has a TDP of 15 watts. The Intel chip is designed for lower power envelopes.

Q: Which processor supports ECC memory?

A: The AMD Ryzen 5 PRO 8645HS supports ECC memory. The Intel Core 3 305 does not support ECC memory.

Specification Differences

The two processors differ in several key specification fields. The AMD Ryzen 5 PRO 8645HS has 12 threads, a base clock of 4.30 GHz, a boost clock of 5.00 GHz, and a TDP of 45 watts. The Intel Core 3 305 has 6 threads, a base clock of 1.50 GHz, a boost clock of 4.30 GHz, and a TDP of 15 watts.

The sockets differ: AMD uses Socket FP7, while Intel uses BGA 1516. The process nodes differ: AMD uses 4 nm from TSMC, while Intel uses 3 nm from Intel. The AMD chip has 25,000 million transistors on a 178 mm² die, while the Intel chip has no recorded transistor or die size data.

Cache configurations differ as listed: AMD provides 64 KB L1 per core, 1 MB L2 per core, and 16 MB shared L3. Intel provides 192 KB total L1, 2.5 MB total L2, and 6 MB shared L3.

Memory support differs: AMD supports DDR5 with dual-channel and ECC, while Intel supports DDR5 and LPDDR5X with single-channel and no ECC. PCIe lanes differ: AMD has 20 lanes of Gen 4, Intel has 6 lanes of Gen 4.

Integrated graphics differ: AMD uses Radeon 760M, Intel uses Intel Xe3 Graphics with 1 Xe core. The release dates also differ, with the AMD chip released in 2024 and the Intel chip released in 2026. The launch MSRP for the Intel Core 3 305 is $309, while no launch MSRP is recorded for the AMD chip.

The Verdict

The data clearly indicates the AMD Ryzen 5 PRO 8645HS is the superior processor for almost all compute tasks. Its 50% leads in every Cinebench test and its 125% lead in integer math make it the definitive choice for multi-threaded workloads such as rendering, compiling, and data processing. The 82nd percentile ranking and an average score of 30,879 place it in a performance class far above the Intel chip.

The Intel Core 3 305 has a specific niche. Its 15 watt TDP makes it suitable for low-power designs, and its single-thread PassMark score of 3,977 is 3% higher than the AMD chip. The find prime numbers result shows a 36.5% advantage in that specific workload, which may indicate an edge in certain cryptographic or mathematical applications. However, its average score of 18,302 and 72nd percentile ranking confirm it is an entry-level part.

For users who need maximum throughput, the AMD Ryzen 5 PRO 8645HS is the data-backed choice. For users who prioritize power efficiency and need only light-threaded performance, the Intel Core 3 305 offers a low-power alternative with a small single-thread advantage. The 13 to 4 win count in head-to-head benchmarks summarizes the overall relationship: the AMD processor dominates, while the Intel processor holds narrow wins in specific, less common workloads.