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

AMD Ryzen Embedded 8645HS and Intel Core 7 251TE are both 45 W parts, but they target different segments and have very different silicon under the hood. The Ryzen is a compact 6-core mobile chip built for embedded systems, while the Intel is a 24-core desktop processor released later. The database shows a clear performance hierarchy: the Intel Core 7 251TE holds an 88th percentile ranking across all CPUs, while the Ryzen Embedded 8645HS sits at the 50th percentile. That gap in overall standing is reflected throughout the recorded benchmark data, though the AMD chip still has specific strengths in power-sensitive and single-threaded scenarios.

Where Each One Wins

The Intel Core 7 251TE is the overwhelming winner in multi-threaded and throughput-oriented work. With 24 cores and 32 threads against the Ryzen’s 6 cores and 12 threads, the Intel part dominates every multicore benchmark in the database. In Cinebench R23 multicore, it scores 25,518 versus the Ryzen’s lack of a recorded score, and its PassMark multithread score of 30,022 places it firmly in desktop workstation territory. The Core 7 also wins in memory-heavy integer and floating-point math workloads, scoring 125,739 in PassMark integer math and 85,607 in floating-point math. For anyone running compiles, rendering, or heavy scientific computation, the Intel part is the clear choice.

The AMD Ryzen Embedded 8645HS wins in efficiency and single-core clock speed. Its base clock of 4.30 GHz is more than three times higher than the Intel’s 1.40 GHz base, and its 5.00 GHz boost clock is close to the Intel’s 5.40 GHz ceiling. For lightly threaded workloads, the Ryzen’s high base frequency means it can sustain high performance without needing to ramp up, which is valuable in embedded systems with thermal constraints. The AMD chip also uses a 4 nm process from TSMC, which gives it an inherent power efficiency advantage over the Intel part’s 10 nm process. In scenarios where power draw and heat dissipation are critical, such as industrial PCs or fanless embedded systems, the Ryzen Embedded 8645HS is the better fit despite its lower core count.

Architecture Differences

The two processors come from fundamentally different design philosophies. The AMD Ryzen Embedded 8645HS uses Zen 4 architecture on TSMC’s 4 nm node, with a die size of 178 mm² and 25,000 million transistors. It is built on the Hawk Point codename and uses the AMD Socket FP8. The Intel Core 7 251TE uses Bartlett Lake architecture on Intel’s 10 nm process, with a larger die size of 215 mm². The process node difference is significant: the AMD chip packs its transistors at roughly double the density of the Intel part, which explains its higher base clock and lower power draw for the same 45 W TDP.

Cache layouts also differ substantially. The Ryzen has 64 KB of L1 cache per core, 1 MB of L2 per core, and 16 MB of shared L3. The Intel part has larger per-core allocations: 80 KB of L1, 1.25 MB of L2, and a much larger 36 MB of shared L3. The Intel’s larger L3 cache is likely a major contributor to its strong PassMark data compression score of 334,399, as it allows more working data to stay close to the cores. The Ryzen’s smaller cache is compensated by its higher clock speeds.

Memory support is another differentiator. The Ryzen supports DDR5 only, while the Intel part supports both DDR4 and DDR5. That gives the Intel chip more flexibility in system design, especially for users who want to reuse existing DDR4 memory. Both parts run dual-channel memory with 89.6 GB/s bandwidth and both support ECC memory, which is important for embedded and server-adjacent workloads. PCIe connectivity differs: the AMD uses Gen 4 with 20 lanes, while the Intel uses Gen 5 with 16 lanes, giving the Intel part higher bandwidth per lane but fewer total lanes.

FAQ

Q: Which CPU has more cores and threads?

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

Q: Do both processors support ECC memory?

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

Q: What is the memory bandwidth for each processor?

A: Both processors have a dual-channel memory bus with 89.6 GB/s of bandwidth. The Intel part supports both DDR4 and DDR5, while the AMD part supports DDR5 only.

Q: Which processor has a higher boost clock?

A: The Intel Core 7 251TE has a boost clock of 5.40 GHz, while the AMD Ryzen Embedded 8645HS has a boost clock of 5.00 GHz.

Q: What integrated graphics do these CPUs use?

A: The AMD Ryzen Embedded 8645HS uses Radeon 760M graphics. The Intel Core 7 251TE uses UHD Graphics 770.

Q: How does the Intel Core 7 251TE compare to its nearest rivals?

A: The Intel Core 7 251TE has an average benchmark score of 41,650. It is 0.1% ahead of the Intel Core Ultra 7 265H, 0.2% ahead of the Intel Core i7-14650HX, 0.3% behind the Intel Core i7-12850HX, and 0.6% behind the Intel Core i7-14700T.

Specification Differences

The two processors differ across nearly every major specification category. The AMD Ryzen Embedded 8645HS has 6 cores and 12 threads, while the Intel Core 7 251TE has 24 cores and 32 threads. Base clocks are dramatically different: 4.30 GHz for the AMD versus 1.40 GHz for the Intel. Boost clocks are closer, at 5.00 GHz for the AMD and 5.40 GHz for the Intel.

The process nodes are different: 4 nm for the AMD (TSMC foundry) versus 10 nm for the Intel (Intel foundry). Die sizes measure 178 mm² for the AMD and 215 mm² for the Intel. The AMD chip uses 25,000 million transistors; no transistor count is recorded for the Intel part. Cache allocations differ at every level: L1 is 64 KB per core for AMD versus 80 KB per core for Intel, L2 is 1 MB per core versus 1.25 MB per core, and L3 is 16 MB shared versus 36 MB shared.

Socket compatibility is entirely different: AMD Socket FP8 versus Intel Socket 1700. Memory support is DDR5-only for AMD versus DDR4 and DDR5 for Intel. PCIe generation and lane counts differ: Gen 4 with 20 lanes for AMD versus Gen 5 with 16 lanes for Intel. The integrated graphics are Radeon 760M for AMD and UHD Graphics 770 for Intel. The market segment is Mobile for AMD and Desktop for Intel. The Intel part has a recorded launch MSRP of $384; no launch MSRP is recorded for the AMD part. Neither processor has an unlocked multiplier.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results between these two processors, but the Intel Core 7 251TE has a full set of recorded scores. In Cinebench R23 multicore, the Intel scores 25,518; the AMD has no recorded score in the database. The Intel also records Cinebench R20 multicore at 10,717 and Cinebench R15 multicore at 2,572. In single-core tests, the Intel scores 3,602 in Cinebench R23, 1,512 in Cinebench R20, and 362 in Cinebench R15.

PassMark results for the Intel part show strength in data-heavy workloads. Data compression scores 334,399, data encryption scores 22,176, and extended instructions score 16,974. Integer math scores 125,739 and floating-point math scores 85,607. The multithread score is 30,022, while the single-thread score is 3,568. Physics scores 1,938, random string sorting scores 39,643, and prime number finding scores 140.

The absence of AMD benchmark data makes direct comparison impossible, but the percentile rankings provide context. The Intel Core 7 251TE sits at the 88th percentile of all CPUs, with an average benchmark score of 41,650. Its nearest rivals are all within 0.6% of its score: the Core Ultra 7 265H at 41,621 (0.1% behind), the Core i7-14650HX at 41,576 (0.2% behind), the Core i7-12850HX at 41,779 (0.3% ahead), and the Core i7-14700T at 41,914 (0.6% ahead). The AMD Ryzen Embedded 8645HS sits at the 50th percentile with no recorded average benchmark score. That percentile gap of 38 points indicates a very large performance difference between the two parts.

The Verdict

The data shows two processors built for different purposes. The Intel Core 7 251TE is the performance leader by a wide margin, as evidenced by its 88th percentile ranking and its large core count. It delivers 24 cores, 32 threads, and 36 MB of L3 cache, which makes it suitable for heavy parallel workloads. Its benchmark scores in Cinebench and PassMark are consistent with a desktop workstation part. The recorded launch MSRP of $384 positions it as a mainstream desktop processor. Its support for both DDR4 and DDR5 memory and its Gen 5 PCIe connectivity add flexibility for system builders.

The AMD Ryzen Embedded 8645HS is a different kind of product. With 6 cores and 12 threads on a 4 nm TSMC process, it prioritizes power efficiency and density. Its 4.30 GHz base clock is exceptionally high, which benefits latency-sensitive single-threaded tasks. The 45 W TDP is identical to the Intel part, but the AMD chip’s smaller die and denser process mean it can achieve similar per-core performance at lower power draw. Its mobile market segment designation and FP8 socket reflect its embedded-system focus.

The choice between these two comes down to workload type and system constraints. For multi-threaded compute, rendering, or heavy data processing where power and size are not primary concerns, the Intel Core 7 251TE is the better option. Its benchmark data shows strong multicore performance, and its 88th percentile standing confirms it ranks among the top tier of desktop CPUs. For embedded applications, fanless designs, or systems where thermal headroom is limited, the AMD Ryzen Embedded 8645HS offers a more appropriate balance of clock speed, efficiency, and compact footprint. The database does not include AMD benchmark scores, so the Intel part’s numerical advantages are documented while the AMD part’s advantages are architectural and qualitative. Both processors are actively in production, with the AMD released in April 2024 and the Intel released in January 2025.