AMD Ryzen 5 PRO 8645HS vs Intel Core 9 273PTE Comparison

The Intel Core 9 273PTE and AMD Ryzen 5 PRO 8645HS are two very different processors that nevertheless land in the same performance tier. The Intel part is a 12-core, 24-thread desktop chip built on Intel’s 10 nm process, while the AMD is a 6-core, 12-thread mobile chip on TSMC’s 4 nm node. Both carry a 45 W TDP and share the same 89.6 GB/s memory bandwidth, yet their benchmark profiles diverge sharply. The Intel wins 11 of the 17 head-to-head comparisons, but the AMD takes the single-thread crown and dominates in several specialized workloads. The average benchmark scores are close: 31143 for Intel against 30879 for AMD, placing both in the 82nd percentile of all CPUs. This is a matchup where the definition of "winner" depends entirely on the workload.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core 9 273PTE has 12 cores and 24 threads, exactly double the 6 cores and 12 threads of the AMD Ryzen 5 PRO 8645HS.

Q: How do their single-core performances compare?

A: The AMD Ryzen 5 PRO 8645HS wins the PassMark single-thread test with a score of 3858, which is 11% ahead of the Intel’s 3433. However, in Cinebench R23 single-core, the Intel wins at 2886 versus 2787, a 3.6% margin.

Q: Which chip is better for multi-threaded rendering?

A: The Intel Core 9 273PTE wins every Cinebench multi-core test. Its R23 multi-core score of 20445 is 3.6% higher than the AMD’s 19742, and the same 3.6% margin applies across R15 and R20 multi-core tests.

Q: Are both processors unlocked for overclocking?

A: No. Both the Intel Core 9 273PTE and the AMD Ryzen 5 PRO 8645HS have a locked multiplier, meaning neither is unlocked.

Q: What is the difference in integrated graphics?

A: The Intel uses UHD Graphics 730, while the AMD features a Radeon 760M. The data does not include graphics benchmark scores, so no direct performance comparison is possible.

Q: Which CPU has better data encryption performance?

A: The AMD Ryzen 5 PRO 8645HS is significantly better, scoring 17387 in PassMark data encryption versus 14253 for the Intel. That is an 18% advantage for the AMD.

Architecture Differences

The two processors are built on fundamentally different architectures. Intel’s Core 9 273PTE is based on the Bartlett Lake design and manufactured on Intel’s 10 nm process, whereas AMD’s Ryzen 5 PRO 8645HS uses the Zen 4 architecture in its Hawk Point design, fabricated by TSMC on a 4 nm node. This process difference is substantial: AMD’s 4 nm node is smaller and newer than Intel’s 10 nm, which partly explains the AMD’s higher base clock of 4.30 GHz compared to Intel’s 1.40 GHz.

The core counts diverge as well. Intel provides 12 physical cores with 24 threads, while AMD offers only 6 cores and 12 threads. This gives Intel a theoretical doubling of parallelism, though the benchmark results show that the real-world multi-core advantage is much smaller than 2x. Cache configurations also differ per core: Intel allocates 80 KB of L1 and 2 MB of L2 per core, while AMD uses 64 KB of L1 and 1 MB of L2 per core. The shared L3 cache heavily favors Intel at 36 MB versus AMD’s 16 MB.

Both support ECC memory and dual-channel memory buses, but the memory types differ. Intel supports both DDR4 and DDR5, while AMD supports only DDR5. PCIe connectivity is also different: Intel offers Gen 5 with 16 lanes, whereas AMD provides Gen 4 with 20 lanes. The AMD chip integrates a Radeon 760M GPU, while Intel uses UHD Graphics 730. The AMD is marked as a mobile processor with an FP7 socket, while Intel is a desktop part on Socket 1700.

Where Each One Wins

The Intel Core 9 273PTE is the clear winner in compute-heavy, multi-threaded workloads. Its Cinebench results are uniformly 3.6% higher across R15, R20, and R23, covering both single-core and multi-core tests. The PassMark suite shows Intel dominating in floating-point math (60673 vs 45481, a 33.4% lead), integer math (82411 vs 72740, a 13.3% lead), and physics (1917 vs 1208, a 58.7% lead). The most dramatic Intel win is in the find prime numbers test, where it scores 142 against AMD’s 73, a 94.5% advantage. For tasks involving heavy arithmetic, number crunching, or physics simulation, the Intel part is the stronger choice.

The AMD Ryzen 5 PRO 8645HS wins where the workload involves data manipulation or specialized instruction sets. It leads in data compression (265826 vs 258704, a 2.7% margin), data encryption (17387 vs 14253, an 18% margin), and extended instructions (21212 vs 15952, a 24.8% margin). It also wins random string sorting by 18.3% (35472 vs 28973). The AMD’s single-thread PassMark score of 3858 is 11% higher than Intel’s 3433, indicating that for lightly threaded applications that rely on raw per-core speed, the AMD is the better option.

The multi-threaded PassMark score slightly favors Intel (24054 vs 23569, a 2.1% lead), but the AMD’s wins in the other categories show a broader applicability. For users whose workloads include compression, encryption, or string processing, the AMD’s architectural efficiency in those areas outweighs its lower core count.

Specification Differences

The two CPUs differ across nearly every major specification. Intel offers 12 cores and 24 threads versus AMD’s 6 cores and 12 threads. The base clocks are drastically different: Intel runs at 1.40 GHz while AMD starts at 4.30 GHz, but Intel boosts higher to 5.50 GHz versus AMD’s 5.00 GHz. Both have a 45 W TDP.

The process nodes differ: Intel uses 10 nm, AMD uses 4 nm. AMD’s transistor count is documented at 25,000 million with a die size of 178 mm², while Intel’s transistor count and die size are not provided. Cache sizes differ per core and in total: Intel has 80 KB L1 and 2 MB L2 per core with 36 MB shared L3; AMD has 64 KB L1 and 1 MB L2 per core with 16 MB shared L3.

Memory support diverges: Intel supports DDR4 and DDR5, while AMD supports only DDR5. Both have dual-channel buses and 89.6 GB/s bandwidth. ECC support is present on both. PCIe versions and lane counts differ: Intel has Gen 5 with 16 lanes, AMD has Gen 4 with 20 lanes. Integrated graphics are different models (UHD Graphics 730 vs Radeon 760M). The sockets are incompatible: Intel uses Socket 1700, AMD uses FP7. The market segments are also different: Intel is desktop, AMD is mobile. The Intel part has a launch MSRP of $549, while the AMD has no listed launch MSRP.

Head-to-Head Benchmarks

The Cinebench suite shows a consistent pattern: the Intel Core 9 273PTE wins every test by exactly 3.6%. In R15 multi-core, Intel scores 2060 against AMD’s 1989. The single-core R15 result is 290 versus 280. Moving to R20, Intel posts 8586 multi-core and 1212 single-core, while AMD manages 8291 and 1170. In R23, the most recent test, Intel scores 20445 multi-core and 2886 single-core, versus AMD’s 19742 and 2787. These uniform margins suggest a consistent per-clock and per-core efficiency advantage for Intel in the Cinebench rendering workload, despite the AMD’s higher base clock.

The PassMark suite tells a more complex story. Intel wins the multithread test narrowly, 24054 to 23569, a 2.1% margin. The physics test is a decisive Intel victory: 1917 versus 1208, a 58.7% lead. Floating-point math also favors Intel heavily, with 60673 against 45481, a 33.4% advantage. Integer math is another Intel win at 82411 versus 72740, a 13.3% edge. The find prime numbers test is the largest single delta: Intel’s 142 beats AMD’s 73 by 94.5%.

The AMD counters strongly in several areas. The single-thread PassMark score is 3858 for AMD versus 3433 for Intel, an 11% AMD win. Data encryption shows a clear AMD advantage: 17387 versus 14253, an 18% margin. Extended instructions are another strong AMD area, with 21212 versus 15952, a 24.8% lead. Random string sorting goes to AMD at 35472 versus 28973, an 18.3% margin. Data compression is the closest AMD win: 265826 versus 258704, a 2.7% edge.

The overall picture is one of split dominance. Intel takes the rendering and arithmetic workloads, while AMD excels in data-oriented tasks and single-threaded PassMark performance. The average benchmark scores are nearly identical, with Intel at 31143 and AMD at 30879, a difference of less than 1%. Both CPUs sit at the 82nd percentile of all processors, confirming that they belong to the same performance class despite their architectural differences.