AMD Ryzen 5 PRO 7645 vs Intel Core i7-12800H Comparison

The AMD Ryzen 5 PRO 7645 and Intel Core i7-12800H are two very different processors that land in the same performance tier. The data shows the AMD part wins 13 of 17 head-to-head benchmarks, while the Intel part takes 4. The Ryzen 5 PRO 7645 is the clear pick for single-threaded performance, multi-core rendering, and most general productivity tasks. The Core i7-12800H is the better choice for specific math-heavy workloads like floating-point and integer calculations, where its higher core count pays off. If you are building a desktop workstation on the AM5 platform, the Ryzen 5 PRO 7645 is the obvious choice. If you are looking at a mobile platform and need maximum throughput in scientific or financial simulations, the Core i7-12800H has a measurable edge in those specific areas.

The Verdict

The data supports a clear split. For most buyers, the AMD Ryzen 5 PRO 7645 is the better processor. It delivers a 42.1% higher score in Cinebench R23 multi-core, a 67.7% higher score in Cinebench R23 single-core, and a 6.2% higher Passmark single-thread score. Its overall average benchmark score is 32,446, placing it in the 83rd percentile of all CPUs, compared to the Intel part's 32,121 average and 82nd percentile. The AMD chip also has a higher boost clock at 5.10 GHz versus 4.80 GHz for Intel.

However, the Core i7-12800H is not a loser. It wins Passmark floating-point math by 25.9% and integer math by 13.5%, which are significant margins. It also edges out the AMD chip in Cinebench R15 multi-core by 1.5% and in Passmark physics by 5%. If your workload is dominated by raw number crunching, the Intel processor is worth considering. But for everything else, the Ryzen 5 PRO 7645 is the safer, faster recommendation. The AMD chip is also a desktop part with a 65W TDP, while the Intel is a 45W mobile part, which explains some of the architectural differences.

Where Each One Wins

The AMD Ryzen 5 PRO 7645 dominates content creation and general productivity. It wins all three modern Cinebench multi-core tests (R20 by 7.7%, R23 by 42.1%) and all three single-core tests (R15 by 16.2%, R20 by 7.8%, R23 by 67.7%). It also wins Passmark data compression by 4.8%, data encryption by 2.6%, extended instructions by 32.9%, find prime numbers by 94.1%, multithread by 4.7%, and random string sorting by 13.5%. This makes it the clear winner for video encoding, 3D rendering, and everyday office work.

The Intel Core i7-12800H wins in specific math scenarios. It takes Passmark floating-point math with a 25.9% lead and integer math with a 13.5% lead. It also wins Passmark physics by 5% and Cinebench R15 multi-core by 1.5%. This indicates the Intel chip is better for simulation software, financial modeling, or scientific computing that relies heavily on arithmetic operations. The 14-core, 20-thread configuration gives it an edge in these parallel math tasks, despite losing in more holistic rendering benchmarks.

Architecture Differences

The two processors come from fundamentally different designs. The AMD Ryzen 5 PRO 7645 uses the Zen 4 architecture on a 5 nm process node from TSMC. It has 6 cores and 12 threads, with a base clock of 3.80 GHz and a boost clock of 5.10 GHz. The die size is 71 mm² with 6,570 million transistors. It uses the AMD Socket AM5 platform, supports DDR5 memory, and has a dual-channel memory bus with a bandwidth of 83.2 GB/s. It also supports ECC memory, which is notable for workstation use.

The Intel Core i7-12800H uses the Alder Lake architecture on a 10 nm process node from Intel. It has 14 cores and 20 threads, with a base clock of 2.40 GHz and a boost clock of 4.80 GHz. The die size is 217 mm², significantly larger than the AMD chip. It uses the Intel BGA 1744 socket, designed for mobile platforms. It supports both DDR4 and DDR5 memory, but does not support ECC. The Intel chip has 24 MB of shared L3 cache, while the AMD chip has 32 MB of shared L3 cache. The AMD chip also has larger per-core L1 (64 KB vs 80 KB) and L2 (1 MB vs 1.25 MB) caches, but the Intel chip has more total cores to use.

The platform differences are stark. The AMD chip uses PCIe Gen 5 with 24 lanes, while the Intel uses PCIe Gen 4 with 20 lanes. The AMD chip integrates Radeon Graphics, while the Intel integrates Iris Xe 96EU. The AMD chip is marked for the Server/Workstation market segment, while the Intel is marked for Mobile. Both have locked multipliers, so neither is overclockable.

FAQ

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

A: The AMD Ryzen 5 PRO 7645 is significantly faster in single-core tests. It wins Cinebench R23 single-core by 67.7% (3065 vs 1828), Cinebench R20 single-core by 7.8% (1287 vs 1194), and Passmark single-thread by 6.2% (3652 vs 3440).

Q: Is the Intel Core i7-12800H better for multi-threaded workloads?

A: It depends on the workload. The Intel chip wins Cinebench R15 multi-core by 1.5% (2222 vs 2188), but the AMD chip wins Cinebench R20 multi-core by 7.7% (9118 vs 8463) and Cinebench R23 multi-core by 42.1% (21710 vs 15283). The Intel chip also wins Passmark integer math by 13.5% and floating-point math by 25.9%, but loses Passmark multithread by 4.7%.

Q: Which CPU supports ECC memory?

A: The AMD Ryzen 5 PRO 7645 supports ECC memory. The Intel Core i7-12800H does not support ECC memory.

Q: What are the memory support differences?

A: The AMD chip supports only DDR5 memory with a dual-channel bus and 83.2 GB/s bandwidth. The Intel chip supports both DDR4 and DDR5 memory with a dual-channel bus, but no bandwidth figure is listed.

Q: Which processor has more cores?

A: The Intel Core i7-12800H has 14 cores and 20 threads. The AMD Ryzen 5 PRO 7645 has 6 cores and 12 threads.

Q: How do the overall benchmark averages compare?

A: The AMD Ryzen 5 PRO 7645 has an average benchmark score of 32,446, which is 0.3% higher than the Intel Core i7-12800H's 32,121. The AMD chip sits in the 83rd percentile, while the Intel sits in the 82nd percentile.

Head-to-Head Benchmarks

The biggest win for the AMD Ryzen 5 PRO 7645 is in Cinebench R23 single-core, where it scores 3065 against the Intel's 1828, a delta of 67.7%. This is a massive gap that shows the Zen 4 architecture's IPC advantage. In Cinebench R23 multi-core, the AMD chip scores 21710 against 15283, a 42.1% lead. This is surprising given the Intel chip has more than double the cores, but the AMD's higher clock speed and efficiency make up the difference.

The AMD chip also wins Passmark find prime numbers by 94.1% (198 vs 102), which is a test that heavily favors single-threaded integer performance. It wins Passmark extended instructions by 32.9% (21813 vs 16408) and Passmark random string sorting by 13.5% (34557 vs 30453). In Cinebench R15 single-core, the AMD chip wins by 16.2% (308 vs 265), and in Cinebench R20 multi-core it wins by 7.7% (9118 vs 8463).

The Intel Core i7-12800H's biggest win is in Passmark floating-point math, where it scores 60961 against the AMD's 45202, a 25.9% lead. It also wins Passmark integer math by 13.5% (86488 vs 74782). These are the two largest wins for the Intel chip, and they show where the extra cores matter most. The Intel chip also wins Passmark physics by 5% (1682 vs 1598) and Cinebench R15 multi-core by 1.5% (2222 vs 2188).

In the remaining tests, the AMD chip wins Passmark data compression by 4.8% (286298 vs 273247), Passmark data encryption by 2.6% (16657 vs 16234), Passmark multithread by 4.7% (25489 vs 24346), and Passmark single-thread by 6.2% (3652 vs 3440). The overall win count is 13 for AMD and 4 for Intel, but the Intel wins are concentrated in the math-heavy areas that some users may prioritize.

Specification Differences

The specifications show two distinct design philosophies. The AMD Ryzen 5 PRO 7645 has 6 cores and 12 threads, while the Intel Core i7-12800H has 14 cores and 20 threads. The AMD chip has a base clock of 3.80 GHz and a boost clock of 5.10 GHz. The Intel chip has a base clock of 2.40 GHz and a boost clock of 4.80 GHz. The AMD chip has a TDP of 65W, while the Intel has a TDP of 45W.

The process nodes differ significantly. The AMD chip uses a 5 nm process from TSMC, while the Intel chip uses a 10 nm process from Intel. The die sizes are 71 mm² for AMD and 217 mm² for Intel. The AMD chip has 6,570 million transistors, while no transistor count is listed for Intel. The cache configurations also differ: AMD has 64 KB L1 per core, 1 MB L2 per core, and 32 MB shared L3. Intel has 80 KB L1 per core, 1.25 MB L2 per core, and 24 MB shared L3.

The sockets are completely incompatible. The AMD chip uses AMD Socket AM5, while the Intel uses Intel BGA 1744. The AMD chip supports DDR5 memory only, while the Intel supports DDR4 and DDR5. The AMD chip has a memory bandwidth of 83.2 GB/s, while no bandwidth is listed for Intel. The AMD chip supports ECC memory, while the Intel does not. The AMD chip uses PCIe Gen 5 with 24 lanes, while the Intel uses PCIe Gen 4 with 20 lanes. Both have integrated graphics, with AMD using Radeon Graphics and Intel using Iris Xe 96EU. Neither has an unlocked multiplier. The AMD chip is marked for Server/Workstation, while the Intel is marked for Mobile.