AMD Ryzen Embedded 8645HS vs Intel Core 7 251E Comparison

Where Each One Wins

The AMD Ryzen Embedded 8645HS and Intel Core 7 251E occupy different positions in the processor landscape, and their respective strengths are defined by architectural priorities rather than direct benchmark competition. The recorded data shows no head-to-head benchmark entries, no wins for either processor, and no rival comparison scores. The analysis must therefore rest entirely on the documented specifications.

The AMD Ryzen Embedded 8645HS is a 6-core, 12-thread mobile processor built on TSMC's 4 nm process node. It uses the Zen 4 architecture under the Hawk Point codename and belongs to the Ryzen Embedded 8000 series. Its base clock is 4.30 GHz with a boost clock of 5.00 GHz, and it carries a 45 W TDP. This combination of high base clock, modest core count, and efficient process node points toward workloads that favor single-thread responsiveness and power-conscious operation. The L1 cache is 64 KB per core, L2 is 1 MB per core, and L3 is 16 MB shared. Memory support is DDR5 over a dual-channel bus with 89.6 GB/s of bandwidth, and ECC memory is supported. PCIe connectivity is Gen 4 with 20 lanes from the CPU. The integrated graphics are Radeon 760M. The release date is April 2024, and the production status is active.

The Intel Core 7 251E is a 24-core, 32-thread desktop processor built on Intel's 10 nm process node. It uses the Bartlett Lake codename and belongs to the Core 7 generation. Its base clock is 2.10 GHz with a boost clock of 5.60 GHz, and it carries a 65 W TDP. This processor offers a much larger core and thread count, which positions it for heavily parallel workloads such as content creation, compilation, and virtualization. The L1 cache is 80 KB per core, L2 is 2 MB per core, and L3 is 36 MB shared. Memory support includes both DDR4 and DDR5 over a dual-channel bus with 89.6 GB/s of bandwidth, and ECC memory is supported. PCIe connectivity is Gen 5 with 16 lanes from the CPU. The integrated graphics are UHD Graphics 770. The release date is January 2025, and the production status is active. The launch MSRP is $384.

The fundamental split is straightforward. The AMD part wins where core count is secondary and clock speed per thread, power efficiency, and the 4 nm process matter most. The Intel part wins where raw thread throughput, total cache capacity, and PCIe Gen 5 connectivity are the deciding factors. The AMD processor uses the smaller die at 178 mm², while the Intel processor uses a larger die at 257 mm². The AMD part lists 25,000 million transistors, while the Intel part does not report a transistor count in the database.

The Verdict

The data indicates that neither processor can be declared a universal winner, because the benchmark results are empty. The database contains no measured scores for either CPU, no percentile distinctions beyond the identical 50th percentile placement, and no nearest rival comparisons. The selection decision must therefore be made on specification alignment with workload type.

The AMD Ryzen Embedded 8645HS should be selected for applications that require a compact, power-conscious mobile processor with high per-core clock speeds. Its 4.30 GHz base clock is more than double the Intel part's 2.10 GHz base clock, and its 45 W TDP is lower than the Intel part's 65 W TDP. The Zen 4 architecture on TSMC's 4 nm node provides a modern, dense implementation. The 6-core, 12-thread configuration is sufficient for embedded control, edge compute, and single-thread-sensitive tasks. The AMD part also offers 20 PCIe Gen 4 lanes, which may be preferable for systems that need more peripheral lanes at Gen 4 speeds.

The Intel Core 7 251E should be selected for applications that need the highest possible thread count in a desktop form factor. Its 24 cores and 32 threads dwarf the AMD part's 6 cores and 12 threads. The 36 MB shared L3 cache is more than double the AMD part's 16 MB. The 5.60 GHz boost clock is the highest recorded figure between the two processors. The Intel part supports both DDR4 and DDR5 memory, which gives system designers flexibility in memory selection. Its PCIe Gen 5 interface with 16 lanes provides higher per-lane bandwidth than the AMD part's Gen 4 implementation. The Intel part also has a larger die at 257 mm², which reflects its higher core count.

The identical percentile placement at 50 for both processors in the database suggests that, absent benchmark data, the two parts are treated as comparable in overall standing. That equivalence is misleading if the workload is heavily threaded, but it is a fair representation for general-purpose use where the Intel part's core advantage is offset by the AMD part's clock and efficiency advantages.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries for this pair. There are no wins recorded for either processor, and there are no average benchmark scores to compare. The absence of measured data means that all comparative statements must derive from the specification sheet. The following analysis uses only the documented values.

The largest specification advantage for the Intel Core 7 251E is core count. It offers 24 cores and 32 threads against the AMD Ryzen Embedded 8645HS's 6 cores and 12 threads. That is an 18-core difference and a 20-thread difference. For any workload that scales with thread count, the Intel part has a decisive structural advantage. The L3 cache difference reinforces this: 36 MB shared on the Intel part versus 16 MB shared on the AMD part, a 20 MB advantage. The L2 cache is also larger per core on the Intel part at 2 MB per core versus 1 MB per core, and the L1 is 80 KB per core versus 64 KB per core.

The largest specification advantage for the AMD Ryzen Embedded 8645HS is base clock. The AMD part runs at 4.30 GHz base, while the Intel part runs at 2.10 GHz base. That is a 2.20 GHz difference in favor of AMD. The AMD part also has a lower TDP at 45 W versus 65 W, a 20 W difference. The process node favors AMD as well: 4 nm from TSMC versus 10 nm from Intel. The AMD part's die size is smaller at 178 mm² versus 257 mm², which is consistent with its lower core count and denser process.

The boost clocks favor Intel. The Intel part reaches 5.60 GHz, while the AMD part reaches 5.00 GHz, a 0.60 GHz advantage for Intel. The PCIe generation favors Intel with Gen 5 versus AMD's Gen 4, though the AMD part offers more lanes at 20 versus Intel's 16.

Memory bandwidth is identical at 89.6 GB/s for both processors, and both support dual-channel memory and ECC. The memory type differs: the AMD part supports only DDR5, while the Intel part supports both DDR4 and DDR5. The integrated graphics differ as well: Radeon 760M on the AMD part versus UHD Graphics 770 on the Intel part, with no performance scores in the database to rank them.

The release dates differ by roughly nine months. The AMD part launched in April 2024, and the Intel part launched in January 2025. Both are marked active in production status.

FAQ

Q: How many cores and threads does each processor have?

A: The AMD Ryzen Embedded 8645HS has 6 cores and 12 threads. The Intel Core 7 251E has 24 cores and 32 threads.

Q: Which processor has the higher boost clock?

A: The Intel Core 7 251E has a boost clock of 5.60 GHz, which is 0.60 GHz higher than the AMD Ryzen Embedded 8645HS's 5.00 GHz boost clock.

Q: Which processor supports PCIe Gen 5?

A: Only the Intel Core 7 251E supports PCIe Gen 5, with 16 lanes from the CPU. The AMD Ryzen Embedded 8645HS uses PCIe Gen 4 with 20 lanes from the CPU.

Q: Do both processors support ECC memory?

A: Yes, both the AMD Ryzen Embedded 8645HS and the Intel Core 7 251E support ECC memory.

Q: What memory types are supported?

A: The AMD Ryzen Embedded 8645HS supports DDR5 only. The Intel Core 7 251E supports both DDR4 and DDR5. Both use a dual-channel memory bus with 89.6 GB/s bandwidth.

Q: What is the TDP of each processor?

A: The AMD Ryzen Embedded 8645HS has a TDP of 45 W. The Intel Core 7 251E has a TDP of 65 W.

Architecture Differences

The architectural split between these two processors is stark. The AMD Ryzen Embedded 8645HS uses the Zen 4 architecture under the Hawk Point codename, built on TSMC's 4 nm process node. The Intel Core 7 251E uses the Bartlett Lake codename under the Core 7 generation, built on Intel's 10 nm process node. The process difference is significant: 4 nm versus 10 nm gives AMD a density and efficiency advantage, while Intel's larger 257 mm² die accommodates a far higher core count than AMD's 178 mm² die.

The transistor counts reflect the different design philosophies. The AMD part lists 25,000 million transistors on its 178 mm² die. The Intel part does not report a transistor count in the database, but its 257 mm² die on a 10 nm process implies a different transistor density profile, though no figure is available for comparison.

Cache hierarchies diverge in both capacity and organization. The AMD part uses 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3. The Intel part uses 80 KB of L1 per core, 2 MB of L2 per core, and 36 MB of shared L3. The Intel part has a larger cache at every level, which is consistent with its higher core count and desktop positioning.

Socket and platform support differ completely. The AMD Ryzen Embedded 8645HS uses AMD Socket FP8, which is a mobile socket. The Intel Core 7 251E uses Intel Socket 1700, which is a desktop socket. This distinction matters for system design: the AMD part targets embedded and mobile applications, while the Intel part targets desktop systems.

Memory architecture is similar in bandwidth but different in flexibility. Both support dual-channel memory with 89.6 GB/s bandwidth. The AMD part supports only DDR5, while the Intel part supports both DDR4 and DDR5. Both support ECC memory, which is notable for embedded and workstation use cases.

PCIe connectivity favors Intel in generation but AMD in lane count. The Intel part offers PCIe Gen 5 with 16 lanes from the CPU. The AMD part offers PCIe Gen 4 with 20 lanes from the CPU. The Gen 5 interface provides higher per-lane bandwidth, while the AMD part provides more total lanes at a lower generation.

Integrated graphics differ by vendor and model. The AMD part uses the Radeon 760M, and the Intel part uses UHD Graphics 770. The database records no performance metrics for either integrated GPU, so no comparison is possible from the recorded data.

Clock behavior reflects the different design targets. The AMD part has a 4.30 GHz base clock and a 5.00 GHz boost clock, a 0.70 GHz boost range. The Intel part has a 2.10 GHz base clock and a 5.60 GHz boost clock, a 3.50 GHz boost range. The Intel part's much larger boost range indicates a design that idles low and boosts aggressively under load, while the AMD part maintains a higher sustained base frequency.

The production status for both processors is active, and neither has an unlocked multiplier. The Intel part has a recorded part number of SRQDUQ657, while the AMD part's part number is listed as unknown. The AMD part is classified as a mobile market segment processor, and the Intel part is classified as a desktop market segment processor. The release dates are April 2024 for AMD and January 2025 for Intel, with the Intel part carrying a launch MSRP of $384.