AMD Ryzen Embedded 8645HS vs Intel Core Ultra 9 285 Comparison

Head-to-Head Benchmarks

The benchmark database contains a complete Cinebench and Passmark suite for the Intel Core Ultra 9 285, while the AMD Ryzen Embedded 8645HS has no recorded benchmark scores. This asymmetry shapes the comparison: the Intel part can be positioned against its rivals, but the AMD processor can only be assessed through its architectural and specification profile.

The Intel Core Ultra 9 285 posts a Cinebench R23 multicore score of 48945 and a single-core score of 6909. In Cinebench R20, it reaches 20556 multicore and 2901 single-core. The R15 results show 4933 multicore and 696 single-core. These figures place the processor at the 95th percentile among all CPUs in the database, with an average benchmark score of 75488.

The nearest rivals in the database are tightly clustered around this average. The AMD EPYC 8224P sits at 75582, a delta of -0.1 percent relative to the Core Ultra 9 285. The AMD EPYC 4545P scores 75373, a delta of 0.2 percent. The AMD Ryzen 7 PRO 9755X3D records 75716, a delta of -0.3 percent, and the AMD Ryzen 7 PRO 9755 reaches 75738, also a delta of -0.3 percent. The Core Ultra 9 285 effectively trades places with these four server and workstation parts, landing within a third of a percent of each.

Passmark results show the Intel processor handling data compression at 602121, data encryption at 46949, and extended instructions at 45357. Prime number finding scores 459, floating point math reaches 194988, integer math hits 164869, and random string sorting completes at 73651. The multithread score is 56602, physics scores 3598, and single-thread performance is 4881. These sub-scores illustrate a processor that scales well across both integer and floating point workloads, with particularly strong throughput in data compression and sorting tasks.

FAQ

Q: How does the Intel Core Ultra 9 285 compare to its closest rivals in the database?

A: The Intel part averages 75488, with the AMD EPYC 8224P at 75582 (-0.1 percent), the AMD EPYC 4545P at 75373 (+0.2 percent), the AMD Ryzen 7 PRO 9755X3D at 75716 (-0.3 percent), and the AMD Ryzen 7 PRO 9755 at 75738 (-0.3 percent). All four rivals sit within a 0.5 percent band.

Q: What is the AMD Ryzen Embedded 8645HS benchmark status?

A: The database shows no benchmark entries for the AMD part. Its average benchmark score is 0, and it holds the 50th percentile among all CPUs. The Intel Core Ultra 9 285, by contrast, holds the 95th percentile.

Q: Which processor has more cores and threads?

A: The Intel Core Ultra 9 285 has 24 cores and 24 threads. The AMD Ryzen Embedded 8645HS has 6 cores and 12 threads. The Intel part provides 4 times the core count and double the thread count.

Q: What are the clock speed differences?

A: The AMD processor has a base clock of 4.30 GHz and a boost clock of 5.00 GHz. The Intel processor has a base clock of 2.50 GHz and a boost clock of 5.60 GHz. The AMD part starts higher, but the Intel part boosts 0.60 GHz further.

Q: Do both processors support ECC memory?

A: Yes, both support ECC memory. Both also use DDR5 with a dual-channel memory bus. Memory bandwidth differs: the AMD part reaches 89.6 GB/s, while the Intel part reaches 102.4 GB/s.

Q: What is the integrated graphics configuration?

A: The AMD Ryzen Embedded 8645HS uses the Radeon 760M. The Intel Core Ultra 9 285 uses the Arc Xe-LPG Graphics 64EU. Both are integrated solutions with no discrete GPU required.

Architecture Differences

The two processors come from different architectural generations and target different market segments. The AMD Ryzen Embedded 8645HS uses the Zen 4 architecture under the Hawk Point codename, part of the 8000 series. The Intel Core Ultra 9 285 uses the Arrow Lake architecture, specifically Arrow Lake-S, within the Core Ultra Series 2.

Process technology differs significantly. The AMD part is built on a 4 nm node at TSMC, while the Intel part uses a 3 nm node, also at TSMC. Transistor counts and die sizes tell a more complex story. The AMD processor packs 25,000 million transistors into a 178 mm² die. The Intel processor uses 17,800 million transistors across a 243 mm² die. The AMD design achieves a higher transistor density on a smaller die, while the Intel design spreads fewer transistors over a larger area.

Cache hierarchies diverge sharply. The AMD part allocates 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3. The Intel part allocates 192 KB of L1 per core, 3 MB of L2 per core, and 36 MB of shared L3. The Intel processor provides 3 times the L1 and L2 per core, and more than double the L3.

PCIe capabilities also differ. The AMD processor uses Gen 4 with 20 lanes from the CPU. The Intel processor uses Gen 5 with 20 lanes from the CPU. The Intel part doubles the per-lane bandwidth available to expansion devices and storage.

Both processors share some architectural traits. Both are active production parts, both have locked multipliers, and both support ECC memory. The socket designs are entirely different: the AMD part uses AMD Socket FP8, while the Intel part uses Intel Socket 1851.

Specification Differences

The core and thread counts establish the largest gap. The AMD Ryzen Embedded 8645HS offers 6 cores and 12 threads. The Intel Core Ultra 9 285 offers 24 cores and 24 threads. The Intel part has no hyperthreading, hence 24 threads from 24 cores, while the AMD part uses simultaneous multithreading to reach 12 threads from 6 cores.

Clock speeds move in opposite directions. The AMD base clock of 4.30 GHz is 1.80 GHz higher than the Intel base clock of 2.50 GHz. The Intel boost clock of 5.60 GHz is 0.60 GHz higher than the AMD boost clock of 5.00 GHz. The AMD part emphasizes a high sustained floor, while the Intel part reaches a higher ceiling.

Thermal design power differs by 20 watts. The AMD processor is rated at 45 W, targeting mobile platforms. The Intel processor is rated at 65 W, targeting desktop systems. This aligns with their market segments: the AMD part is marked as Mobile, the Intel part as Desktop.

Memory bandwidth favors the Intel processor at 102.4 GB/s versus 89.6 GB/s. Both use dual-channel DDR5. The Intel part also posts a higher process node advantage at 3 nm versus 4 nm.

The production status for both is Active. The AMD processor was released on 2024-04-01, while the Intel processor was released on 2024-12-31. The Intel part has a launch MSRP of $579. The AMD part has no recorded launch MSRP.

Where Each One Wins

The Intel Core Ultra 9 285 wins on raw compute throughput. Its Cinebench R23 multicore score of 48945 and Passmark multithread score of 56602 reflect a processor designed for heavily parallel workloads. The 24-core configuration with 36 MB of L3 and 102.4 GB/s of memory bandwidth supports sustained multi-threaded execution. The 95th percentile ranking confirms its position among the fastest CPUs in the database, trading blows with EPYC and Ryzen 7 PRO parts that score within 0.3 percent.

The AMD Ryzen Embedded 8645HS wins on power efficiency per core and platform flexibility. Its 45 W TDP is 20 W lower than the Intel part. The base clock of 4.30 GHz is 1.80 GHz higher, indicating a design that maintains strong single-thread performance without requiring the same thermal envelope. The smaller 178 mm² die and 25,000 million transistors on a 4 nm node suggest a compact, integrated solution for embedded and mobile applications.

The Intel processor wins on PCIe bandwidth potential with Gen 5 support. The AMD processor wins on transistor density, packing 25,000 million transistors into a die 65 mm² smaller than the Intel part. The Intel processor wins on cache capacity, with 36 MB of L3 versus 16 MB. The AMD processor wins on per-core L1 and L2 efficiency relative to its core count.

The Verdict

The data clearly separates these processors by role. The Intel Core Ultra 9 285 is a desktop-class compute engine. Its benchmark scores demonstrate leadership in multi-threaded applications: Cinebench R23 multicore at 48945, Passmark multithread at 56602, and data compression at 602121. The 95th percentile ranking and the tight clustering of its nearest rivals, all within 0.3 percent of its average score of 75488, place it among top-tier server and workstation processors.

The AMD Ryzen Embedded 8645HS is a mobile and embedded processor with no recorded benchmarks. Its 45 W TDP, 6 cores, 12 threads, and 5.00 GHz boost clock indicate a design focused on balanced performance within a constrained thermal budget. The higher base clock of 4.30 GHz suggests responsiveness in single-threaded tasks, while the 12 threads provide moderate parallel capability.

A buyer choosing between these two parts is selecting between market segments, not just performance tiers. The Intel part demands a desktop platform with Socket 1851, 65 W cooling, and Gen 5 expansion. The AMD part fits mobile and embedded platforms with Socket FP8, 45 W cooling, and Gen 4 expansion. The Intel processor has a launch MSRP of $579. The AMD processor has no listed launch MSRP, reflecting its embedded distribution model.

The benchmark database shows no direct head-to-head results, so the comparison rests on architectural and specification data. The Intel Core Ultra 9 285 delivers class-leading multi-threaded compute with a 95th percentile standing. The AMD Ryzen Embedded 8645HS offers a lower-power, higher-base-clock alternative for systems where thermal and physical constraints take priority over raw throughput. The choice depends on whether the workload demands 24 cores of Arrow Lake performance or the compact, efficient Zen 4 design of Hawk Point.