AMD Ryzen 5 PRO 8645HS vs AMD Ryzen 7 2700X Comparison

FAQ

Q: Which processor wins the majority of benchmark comparisons?

A: The AMD Ryzen 5 PRO 8645HS wins 12 out of 13 head-to-head tests. The AMD Ryzen 7 2700X wins only a single test, passmark data compression, by a margin of 0.1%.

Q: How much faster is the Ryzen 5 PRO 8645HS in single-threaded performance?

A: In passmark single-thread testing, the Ryzen 5 PRO 8645HS scores 3858 against 2417 for the Ryzen 7 2700X, a 59.6% advantage. The Cinebench R15 single-core test shows a similar gap: 280 versus 175.7, a 59.4% difference.

Q: Does the Ryzen 7 2700X have more cores?

A: Yes, the Ryzen 7 2700X has 8 cores and 16 threads, while the Ryzen 5 PRO 8645HS has 6 cores and 12 threads. Despite having fewer cores and threads, the Ryzen 5 PRO 8645HS still wins the multicore Cinebench R15 test by 12.9%.

Q: What are the process node differences?

A: The Ryzen 5 PRO 8645HS is built on TSMC's 4 nm process with 25,000 million transistors on a 178 mm² die. The Ryzen 7 2700X uses GlobalFoundries' 12 nm process with 4,800 million transistors on a 213 mm² die.

Q: Which CPU supports DDR5 memory?

A: Only the AMD Ryzen 5 PRO 8645HS supports DDR5 memory. The Ryzen 7 2700X supports DDR4. Both use dual-channel memory buses, but the Ryzen 5 PRO 8645HS has a memory bandwidth of 89.6 GB/s versus 46.9 GB/s for the Ryzen 7 2700X.

Q: Does either processor include integrated graphics?

A: The Ryzen 5 PRO 8645HS includes Radeon 760M integrated graphics. The Ryzen 7 2700X has no integrated graphics, meaning it requires a discrete GPU for display output.

Where Each One Wins

The Ryzen 5 PRO 8645HS dominates nearly every workload category in the recorded data. Its largest wins come in extended instruction handling, where it scores 21212 versus 10155 for the Ryzen 7 2700X, a 108.9% advantage. This indicates substantial superiority in cryptography, SIMD, and other specialized instruction workloads. The physics test shows a 52.5% lead (1208 versus 792), suggesting stronger floating-point and simulation performance. Floating-point math itself favors the Ryzen 5 PRO 8645HS by 39.7% (45481 versus 32563). Multithreaded PassMark performance is 34.9% higher (23569 versus 17468), and integer math is 14.6% ahead (72740 versus 63485).

The Ryzen 7 2700X wins only one test: data compression. Its score of 266134 edges out the Ryzen 5 PRO 8645HS's 265826, a 0.1% difference. This is essentially a statistical tie, but the direction favors the older processor. In every other measured workload, the Ryzen 5 PRO 8645HS takes the lead, often by large margins.

For practical use, the Ryzen 5 PRO 8645HS is the better choice for single-threaded applications, encryption, extended instruction sets, physics simulations, and general productivity. The Ryzen 7 2700X offers no meaningful advantage outside of a marginal edge in compression tasks, which is unlikely to justify its other weaknesses.

Architecture Differences

These two processors represent vastly different generations of AMD design. The Ryzen 5 PRO 8645HS uses Zen 4 architecture under the Hawk Point codename, while the Ryzen 7 2700X uses the original Zen architecture under the Pinnacle Ridge codename, often referred to as Zen+. The process node gap is significant: 4 nm TSMC versus 12 nm GlobalFoundries. This explains the transistor density difference, with the Ryzen 5 PRO 8645HS packing 25,000 million transistors into 178 mm², while the Ryzen 7 2700X uses 4,800 million transistors across 213 mm².

Cache layouts differ per core. The Ryzen 5 PRO 8645HS has 64 KB of L1 per core and 1 MB of L2 per core, while the Ryzen 7 2700X has 96 KB of L1 per core and 512 KB of L2 per core. Both share 16 MB of L3 cache. The Ryzen 5 PRO 8645HS compensates for smaller per-core L1 and larger per-core L2 with a far newer memory subsystem, supporting DDR5 and achieving 89.6 GB/s bandwidth. The Ryzen 7 2700X is limited to DDR4 at 46.9 GB/s.

PCIe support also differs. The Ryzen 5 PRO 8645HS provides Gen 4 with 20 lanes, while the Ryzen 7 2700X provides Gen 3 with 16 lanes. The Ryzen 5 PRO 8645HS integrates Radeon 760M graphics, which the Ryzen 7 2700X lacks entirely. The Ryzen 7 2700X has an unlocked multiplier, allowing overclocking, while the Ryzen 5 PRO 8645HS does not. ECC memory support is present on the Ryzen 5 PRO 8645HS but absent on the Ryzen 7 2700X.

Specification Differences

The Ryzen 5 PRO 8645HS has 6 cores and 12 threads, while the Ryzen 7 2700X has 8 cores and 16 threads. Base clocks differ: 4.30 GHz for the Ryzen 5 PRO 8645HS versus 3.70 GHz for the Ryzen 7 2700X. Boost clocks also favor the newer chip: 5.00 GHz versus 4.35 GHz. TDP ratings are dramatically different: 45 watts for the Ryzen 5 PRO 8645HS versus 105 watts for the Ryzen 7 2700X.

Sockets are incompatible. The Ryzen 5 PRO 8645HS uses AMD Socket FP7, while the Ryzen 7 2700X uses AMD Socket AM4. The Ryzen 5 PRO 8645HS is a mobile segment processor, while the Ryzen 7 2700X is a desktop part. The Ryzen 5 PRO 8645HS supports DDR5 and ECC memory; the Ryzen 7 2700X supports DDR4 without ECC. Memory bandwidth is nearly double on the newer chip: 89.6 GB/s versus 46.9 GB/s. PCIe generation and lane counts differ: Gen 4 with 20 lanes versus Gen 3 with 16 lanes. The Ryzen 5 PRO 8645HS includes Radeon 760M integrated graphics; the Ryzen 7 2700X has none. The Ryzen 7 2700X has an unlocked multiplier; the Ryzen 5 PRO 8645HS does not. Release dates are far apart: April 2024 for the Ryzen 5 PRO 8645HS versus April 2018 for the Ryzen 7 2700X. The Ryzen 7 2700X had a launch MSRP of $329.

Head-to-Head Benchmarks

The most striking result in the database is the Cinebench R15 single-core test. The Ryzen 5 PRO 8645HS scores 280, which is 59.4% higher than the Ryzen 7 2700X's 175.7. This gap reflects not only clock speed advantages but also architectural improvements across six years of development. The PassMark single-thread test confirms the pattern: 3858 versus 2417, a 59.6% lead.

In multicore workloads, the Ryzen 7 2700X's extra two cores and four threads do not overcome the newer processor's efficiency. Cinebench R15 multicore shows the Ryzen 5 PRO 8645HS at 1989 versus 1762, a 12.9% advantage. The PassMark multithread test shows a larger margin: 23569 versus 17468, a 34.9% gap. Physics performance follows a similar trend, with the Ryzen 5 PRO 8645HS scoring 1208 against 792, a 52.5% advantage.

Extended instruction performance is where the Ryzen 5 PRO 8645HS truly separates itself. Its score of 21212 doubles the Ryzen 7 2700X's 10155, a 108.9% improvement. This suggests workloads using AVX-512 or similar instruction sets will see massive gains. Prime number finding also favors the newer chip: 73 versus 41, a 78% advantage. Floating-point math is 39.7% higher (45481 versus 32563), and integer math is 14.6% higher (72740 versus 63485). Random string sorting shows a 16.1% lead (35472 versus 30563), while data encryption is 2.7% ahead (17387 versus 16929).

The only reverse result comes from data compression, where the Ryzen 7 2700X scores 266134 versus 265826 for the Ryzen 5 PRO 8645HS, a 0.1% difference. This is within measurement noise and carries no practical significance.

The Verdict

The data is unambiguous. The AMD Ryzen 5 PRO 8645HS outperforms the AMD Ryzen 7 2700X in 12 of 13 recorded benchmarks, often by substantial margins. Despite having fewer cores and threads, the newer processor wins multicore tests thanks to higher clocks, a modern architecture, and dramatically better memory bandwidth. The 59.6% single-thread advantage and 108.9% extended instruction advantage make the Ryzen 5 PRO 8645HS the clear choice for nearly any workload.

The Ryzen 7 2700X retains one narrow victory in data compression, but a 0.1% margin is not a reason to choose it. Its 105 watt TDP, DDR4 memory support, and lack of integrated graphics further diminish its appeal in comparison. The Ryzen 5 PRO 8645HS offers competitive performance at 45 watts, includes Radeon 760M graphics, supports DDR5 and ECC memory, and uses PCIe Gen 4.

For users building a new system, the Ryzen 5 PRO 8645HS is the stronger processor in every meaningful category. The Ryzen 7 2700X remains an active product in the database, but its role is limited to legacy AM4 platforms where the socket and DDR4 memory support are already in place. Anyone choosing between these two for a new build should favor the Ryzen 5 PRO 8645HS without hesitation.