AMD Ryzen 5 6600H vs AMD Ryzen 5 PRO 5655GE Comparison

The AMD Ryzen 5 PRO 5655GE and AMD Ryzen 5 6600H are both six-core, twelve-thread AMD processors, but they target different segments of the market: the former is a desktop part for Socket AM4, while the latter is a mobile chip for Socket FP7. Both CPUs sit at the 78th percentile among all processors, indicating a similar overall performance tier, yet their benchmark profiles diverge significantly depending on the workload. The 5655GE excels in sustained multi-threaded rendering and single-thread integer tasks, while the 6600H counters with superior physics simulation and Cinebench R15 results. Their architectural differences—Zen 3 on 7nm versus Zen 3+ on 6nm—and platform features like memory support and PCIe lanes create a complex comparison where the "better" chip depends entirely on the application.

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD Ryzen 5 PRO 5655GE posts an average benchmark score of 25,880, while the AMD Ryzen 5 6600H trails slightly with an average score of 25,550, a difference of roughly 1.3%.

Q: How do these chips compare in Cinebench R23 multi-core performance?

A: The Ryzen 5 PRO 5655GE is the clear winner, scoring 15,504 versus the 6600H's 10,322. This represents a 50.2% advantage for the desktop part in this sustained multi-threaded workload.

Q: Does the mobile Ryzen 5 6600H win any multi-threaded benchmarks?

A: Yes, in Cinebench R15 multi-core, the 6600H scores 1,681.5 compared to 1,562 for the 5655GE, a 7.1% lead. It also wins PassMark's multithread test with 18,669 points versus 18,057 for the 5655GE.

Q: Which chip is better for single-threaded workloads according to PassMark?

A: The Ryzen 5 PRO 5655GE has a slight edge, scoring 3,240 points in PassMark's single-thread test, which is 2% higher than the 3,178 points achieved by the Ryzen 5 6600H.

Q: What is the most significant performance gap between the two processors?

A: The biggest gap is in Cinebench R23 single-core, where the 5655GE scores 2,188 against the 6600H's 1,458, a 50.1% difference. The second-largest is in R23 multi-core, also favoring the 5655GE by 50.2%.

Q: Are these processors comparable to any other CPUs in the database?

A: The Ryzen 5 PRO 5655GE is closely matched with the Intel Core i7-11700K (0.3% delta) and the AMD Ryzen AI 5 340 (-0.4% delta). The Ryzen 5 6600H sits near the AMD Ryzen 7 5700 (0.1% delta) and the AMD Ryzen 5 7640U (0.3% delta).

The Verdict

The benchmark data tells a story of two distinct performance profiles. For users prioritizing sustained multi-core rendering and heavy computational loads, the AMD Ryzen 5 PRO 5655GE is the definitive choice. Its Cinebench R23 multi-core score of 15,504 dwarfs the 6600H's 10,322, a 50.2% advantage that will translate to significantly faster video encoding and 3D rendering times. The desktop chip also leads in PassMark integer math (67,582 vs 64,927) and floating-point math (38,204 vs 36,796), reinforcing its strength in processor-intensive tasks.

Conversely, the AMD Ryzen 5 6600H is the better option for scenarios involving physics calculations or legacy multi-threaded benchmarks. Its PassMark physics score of 891 is 27.3% higher than the 5655GE's 648, and it wins the Cinebench R15 multi-core test by 7.1%. The mobile chip also edges out the desktop part in PassMark multithread (18,669 vs 18,057) and data compression (229,879 vs 228,037), suggesting it may have better memory subsystem performance in some workloads.

The choice ultimately hinges on the target platform. The 5655GE is a desktop processor on Socket AM4 with DDR4 support, making it suitable for workstation builds that need consistent multi-threaded throughput. The 6600H is a mobile processor on Socket FP7 with DDR5 support, designed for laptops where the 45W TDP and higher boost clock of 4.50 GHz are more relevant than raw sustained rendering power. Given the 50% swings in either direction on Cinebench R23, these chips are not direct substitutes; each is optimized for its respective market segment.

Head-to-Head Benchmarks

The most dramatic divergence occurs in the Cinebench R23 tests. In multi-core, the Ryzen 5 PRO 5655GE achieves a score of 15,504 against the 6600H's 10,322, yielding a +50.2% delta that is the largest of any benchmark comparison. This is almost mirrored in single-core R23, where the 5655GE scores 2,188 versus 1,458 for the 6600H, a +50.1% lead. These results indicate that the desktop chip maintains significantly higher sustained clock performance under load, likely due to its higher base clock of 3.40 GHz and 65W TDP, whereas the mobile part's 3.30 GHz base and 45W TDP limit its long-term throughput.

However, the 6600H strikes back decisively in the older Cinebench R15 tests. It wins multi-core with 1,681.5 points against 1,562 for the 5655GE, a -7.1% delta from the perspective of the desktop chip. The mobile part also takes R15 single-core with 234 points versus 220, a -6% delta. This suggests that in shorter, less demanding workloads, the 6600H's higher boost clock of 4.50 GHz (versus 4.40 GHz for the 5655GE) allows it to pull ahead, as thermal headroom is less of a constraint.

The PassMark suite offers a mixed bag that further highlights their different strengths. The 6600H wins physics by a wide margin, scoring 891 versus 648 for the 5655GE, a -27.3% delta. It also takes data compression (229,879 vs 228,037, -0.8%), extended instructions (15,903 vs 15,714, -1.2%), find prime numbers (52 vs 49, -5.8%), and random string sorting (23,888 vs 23,769, -0.5%). Conversely, the 5655GE wins data encryption (14,509 vs 14,277, +1.6%), floating-point math (38,204 vs 36,796, +3.8%), integer math (67,582 vs 64,927, +4.1%), and single-thread performance (3,240 vs 3,178, +2%). With the 6600H taking eight wins to the 5655GE's seven, the overall PassMark results are nearly tied, but the margin of victory in physics is substantial.

Specification Differences

The two processors differ in nearly every platform-defining specification. The Ryzen 5 PRO 5655GE uses the AMD Socket AM4, while the Ryzen 5 6600H uses the AMD Socket FP7. This immediately dictates the target device: desktop versus mobile. The 5655GE has a base clock of 3.40 GHz and a boost clock of 4.40 GHz, whereas the 6600H starts at 3.30 GHz but boosts to 4.50 GHz. The desktop chip has a TDP of 65W, while the mobile chip is rated at 45W, reflecting its power-constrained design.

Memory support is another major differentiator. The 5655GE supports DDR4 memory with a dual-channel bus and a maximum bandwidth of 51.2 GB/s, and it also supports ECC memory. The 6600H supports DDR5 memory, also dual-channel, but with a higher bandwidth of 76.8 GB/s; it does not support ECC. PCIe connectivity differs as well: the 5655GE offers Gen 3 with 16 lanes, while the 6600H provides Gen 4 with 20 lanes, giving the mobile chip more modern and faster expansion options.

The integrated graphics units are distinct. The 5655GE features a Radeon Vega 7, while the 6600H uses a Radeon 660M. The 5655GE has a release date of May 6, 2024, while no release date is listed for the 6600H. Both chips have locked multipliers, meaning they are not unlocked for overclocking. Finally, the part numbers differ: 100-000001514 for the 5655GE and 100-000000546100-000000562 for the 6600H.

Architecture Differences

The architectural gap between these two CPUs is rooted in their process nodes and core designs. The Ryzen 5 PRO 5655GE is built on Zen 3 architecture, codenamed Cezanne, and manufactured on a 7nm process by TSMC. It contains 10,700 million transistors on a die size of 180 mm². The Ryzen 5 6600H uses the newer Zen 3+ architecture, codenamed Rembrandt, and is fabricated on a more advanced 6nm process, also by TSMC. Its die size is larger at 208 mm², and its transistor count is not listed.

Cache configurations are nearly identical but not exactly the same. Both have 64 KB of L1 cache per core and 512 KB of L2 cache per core. The L3 cache is 16 MB on both, but the 5655GE lists it as simply "16 MB," while the 6600H specifies "16 MB (shared)." Neither processor features 3D V-Cache.

The memory controllers differ due to the platform. The 5655GE's Zen 3 design is paired with DDR4, while the 6600H's Zen 3+ architecture supports DDR5, which explains the bandwidth difference from 51.2 GB/s to 76.8 GB/s. The 6600H also supports more PCIe lanes (20 vs 16) and a newer PCIe generation (Gen 4 vs Gen 3), indicating that the Rembrandt architecture was designed with more modern I/O capabilities. The 6600H's integrated Radeon 660M graphics represent a newer GPU architecture compared to the 5655GE's Radeon Vega 7, though no specific graphics benchmarks are provided in the data. These architectural differences—process node, memory type, and I/O—define the fundamental platform capabilities that separate these two chips.