AMD Ryzen 5 PRO 7645 vs AMD Ryzen 7 8700G Comparison

FAQ

Q: Which processor has the higher single-thread performance?

A: The AMD Ryzen 5 PRO 7645 dominates in single-thread workloads. In Cinebench R23 single-core, it scores 3065 against the Ryzen 7 8700G's 1817, a 40.7% advantage. The Ryzen 5 PRO 7645 also wins Cinebench R15 single-core, 308 versus 286, a 7.1% lead.

Q: How do the two compare in multi-threaded performance?

A: The results are mixed. The Ryzen 7 8700G wins PassMark multithread, 31690 versus 25489, a 24.3% gap, and Cinebench R15 multicore, 2693 versus 2188, a 23.1% lead. However, the Ryzen 5 PRO 7645 takes Cinebench R23 multicore, 21710 versus 17128, a 21.1% advantage.

Q: Which CPU is better for data compression and encryption workloads?

A: The Ryzen 7 8700G leads clearly in both. It scores 386811 in PassMark data compression versus 286298, a 35.1% advantage, and 22842 in data encryption versus 16657, a 37.1% lead.

Q: Do both processors have the same memory bandwidth?

A: Yes, both support DDR5 memory in dual-channel mode with a memory bandwidth of 83.2 GB/s. Neither processor has a bandwidth advantage.

Q: What are the core and thread counts of each CPU?

A: The Ryzen 7 8700G has 8 cores and 16 threads. The Ryzen 5 PRO 7645 has 6 cores and 12 threads. The 8700G has two more cores and four more threads.

Q: Which processor has the higher average benchmark score?

A: The Ryzen 7 8700G has an average benchmark score of 33089, while the Ryzen 5 PRO 7645 scores 32446. Both sit at the 83rd percentile among all CPUs.

The Verdict

The Ryzen 7 8700G is the better choice for users who prioritize integer math, floating point math, data compression, encryption, extended instructions, random string sorting, and overall multithread throughput. It wins 11 of the 15 head-to-head benchmark comparisons, with its largest victories coming in PassMark floating point math (41.2% ahead), integer math (37.9% ahead), and data encryption (37.1% ahead). For desktop users running mixed workloads, the 8700G's 8-core, 16-thread configuration and higher base clock (4.20 GHz versus 3.80 GHz) translate into tangible wins across most PassMark tests.

The Ryzen 5 PRO 7645 is the pick for single-thread-heavy tasks and for Cinebench R23 multicore rendering. Its Cinebench R23 single-core score of 3065 is a massive 40.7% ahead of the 8700G, and its Cinebench R23 multicore result, 21710 versus 17128, is 21.1% ahead despite having fewer cores. This suggests the Raphael-based chip has a significant architectural efficiency edge in certain rendering scenarios. The PRO 7645 also wins PassMark find prime numbers, 198 versus 103, a 48% advantage.

The database shows both processors occupy the same percentile ranking (83rd), and their nearest rivals largely overlap in average score. The 8700G's nearest rival, the Intel Core i7-13650HX, matches its average score exactly (33089), while the Ryzen 5 PRO 7645's closest competitor, the AMD Ryzen AI 7 PRO 360, trails by 0.7% (32662 versus 32446). Neither chip is dramatically ahead of its peer group.

For a desktop user who does not rely on rendering workloads, the Ryzen 7 8700G offers the broader set of wins. For a user whose workflow depends on single-core responsiveness or Cinebench rendering, the Ryzen 5 PRO 7645 is the stronger option, despite its lower core count.

Head-to-Head Benchmarks

The biggest win for the Ryzen 7 8700G is PassMark floating point math, where it scores 63815 against 45202, a 41.2% advantage. This is the largest delta in either direction across the entire comparison. Integer math follows closely: 103107 versus 74782, a 37.9% lead. Data encryption shows a 37.1% gap (22842 versus 16657), and data compression is 35.1% ahead (386811 versus 286298). Extended instructions favor the 8700G by 33.3% (29067 versus 21813), and random string sorting by 33.2% (46025 versus 34557). PassMark multithread gives the 8700G a 24.3% edge (31690 versus 25489), and Cinebench R15 multicore is 23.1% in its favor (2693 versus 2188). PassMark single-thread is closer, with the 8700G ahead 7.6% (3928 versus 3652), and PassMark physics shows only a 3.1% gap (1647 versus 1598).

The Ryzen 5 PRO 7645 takes the remaining four benchmarks. The most striking is PassMark find prime numbers, where it scores 198 versus 103, a 48% lead. Cinebench R23 single-core is next: 3065 versus 1817, a 40.7% advantage. Cinebench R23 multicore goes to the PRO 7645 by 21.1% (21710 versus 17128), and Cinebench R15 single-core is 7.1% in its favor (308 versus 286).

The pattern is clear. The 8700G wins in throughput-oriented math, encryption, and sorting tasks. The PRO 7645 wins in prime number calculation, both Cinebench R23 tests, and one legacy single-core test. The Cinebench R23 results are particularly notable because they contradict the PassMark multithread result: the PRO 7645 wins the newer Cinebench render test despite losing PassMark multithread by 24.3%. This suggests workload-specific behavior in how each chip schedules its cores.

Specification Differences

The core and thread counts differ: the Ryzen 7 8700G has 8 cores and 16 threads, while the Ryzen 5 PRO 7645 has 6 cores and 12 threads. Base clocks differ, with the 8700G at 4.20 GHz and the PRO 7645 at 3.80 GHz. Both have the same boost clock of 5.10 GHz and the same 65 W TDP.

The cache layouts differ significantly. Both use 64 KB L1 per core and 1 MB L2 per core, but the L3 cache is different: the 8700G has 16 MB shared L3, while the PRO 7645 has 32 MB shared L3. This doubles the L3 capacity on the PRO 7645.

The integrated graphics differ. The 8700G carries a Radeon 780M, while the PRO 7645 carries a generic Radeon Graphics solution. The 8700G has an unlocked multiplier, while the PRO 7645 is locked. The 8700G supports no ECC memory, while the PRO 7645 supports ECC memory.

The process nodes and dies differ. The 8700G is built on a 4 nm process at TSMC with 25,000 million transistors and a die size of 178 mm². The PRO 7645 is built on a 5 nm process at TSMC with 6,570 million transistors and a die size of 71 mm².

PCIe support differs. The 8700G offers Gen 4 with 20 lanes (CPU only), while the PRO 7645 offers Gen 5 with 24 lanes (CPU only). The market segments differ: the 8700G is listed as Desktop, while the PRO 7645 is listed as Server/Workstation. The 8700G was released on 2024-01-07, while the PRO 7645 was released on 2023-06-12. The 8700G has a launch MSRP of $329; the PRO 7645 has no listed launch MSRP.

Architecture Differences

Both processors use AMD's Zen 4 architecture, but they come from different codenames. The Ryzen 7 8700G is from the Phoenix line, while the Ryzen 5 PRO 7645 is from the Raphael line. This explains several of the measured differences.

The Phoenix chip is built on a 4 nm process, while Raphael uses a 5 nm process. Both are manufactured by TSMC. The 8700G integrates 25,000 million transistors on a 178 mm² die, while the PRO 7645 integrates 6,570 million transistors on a 71 mm² die. The 8700G's larger die and transistor count reflect its integrated Radeon 780M graphics, which is absent from the PRO 7645's basic Radeon Graphics.

The L3 cache difference is notable: 16 MB on the 8700G versus 32 MB on the PRO 7645. This larger L3 on the Raphael chip likely contributes to its strong Cinebench R23 performance and its 48% lead in PassMark find prime numbers. The 8700G compensates with more cores and a higher base clock.

The PRO 7645 supports ECC memory, a feature the 8700G lacks, and its Gen 5 PCIe with 24 lanes exceeds the 8700G's Gen 4 with 20 lanes. These features align with the PRO 7645's Server/Workstation market segment. The 8700G, by contrast, is a Desktop part with an unlocked multiplier, inviting overclocking.

The codename difference also shows in the generation labeling: the 8700G is listed as "Ryzen 7 (Zen 4 (Phoenix))" and the PRO 7645 as "Ryzen 5 (Zen 4 (Raphael))". Both share the same boost clock, memory support, and memory bandwidth, so the architectural differences focus on process node, die size, L3 capacity, PCIe generation, ECC support, and integrated graphics capability.

Where Each One Wins

The Ryzen 7 8700G wins in most throughput-oriented workloads. PassMark integer math, floating point math, data compression, data encryption, extended instructions, random string sorting, and multithread all favor the 8700G by margins ranging from 24.3% to 41.2%. It also wins Cinebench R15 multicore and PassMark single-thread. For a desktop user running general productivity, compression, encryption, or mixed math workloads, the 8700G is the stronger performer. Its extra two cores and four threads, plus its higher base clock, give it a consistent edge across the PassMark suite.

The Ryzen 5 PRO 7645 wins in Cinebench R23 multicore and single-core, Cinebench R15 single-core, and PassMark find prime numbers. The single-core wins are substantial: 40.7% in Cinebench R23 and 7.1% in Cinebench R15. The R23 multicore win, 21.1% ahead despite fewer cores, suggests that rendering workloads on the newer Cinebench version respond well to the PRO 7645's larger L3 cache and Raphael architecture. The 48% lead in find prime numbers is the largest single-test margin in the comparison.

For ECC memory support, PCIe Gen 5, and 24 lanes, the PRO 7645 is the only option. For an unlocked multiplier, a 4 nm process, a Radeon 780M integrated GPU, and a desktop market designation, the 8700G is the choice. The 8700G's average benchmark score of 33089 is 2% higher than the PRO 7645's 32446, but both sit at the 83rd percentile, so the overall performance tier is similar.

The verdict from the data: pick the 8700G for broad multithreaded desktop work and integrated graphics capability. Pick the PRO 7645 for single-thread responsiveness, Cinebench rendering, prime number calculation, ECC memory, and PCIe Gen 5 connectivity. The two chips serve different priorities despite sharing the Zen 4 architecture and the AM5 socket.