AMD Ryzen 5 PRO 5655G vs AMD Ryzen 7 5800X3D Comparison

The AMD Ryzen 5 PRO 5655G and AMD Ryzen 7 5800X3D present a fascinating study in contrasting design philosophies within the same socket and generation. Both are 7 nm Zen 3 parts on the AM4 platform, yet their benchmark profiles are anything but uniform. The data reveals a processor that wins decisively in some synthetic single-core tests while trailing heavily in multi-threaded and specialized workloads, making the choice between them highly dependent on the intended application.

Head-to-Head Benchmarks

The most striking result in the head-to-head data is the Cinebench R23 single-core score, where the Ryzen 5 PRO 5655G delivers a 67.7% higher score than the 5800X3D (2435 vs 1452). This is an enormous margin, far exceeding the 1.7% edge seen in Cinebench R15 single-core (245 vs 241). The discrepancy suggests the 5800X3D’s design—which prioritizes cache capacity—may not scale well in the R23 single-threaded test, while the 5655G’s higher base clock of 3.90 GHz (vs 3.40 GHz) and more conventional cache layout prove advantageous.

In multi-core workloads, the picture is mixed. The Ryzen 7 5800X3D wins Cinebench R15 multi-core by 28% (2413 vs 1738), leveraging its two additional cores and 16 threads. However, the Ryzen 5 PRO 5655G flips the script in Cinebench R23 multi-core, winning by 20.5% (17249 vs 14317). This reversal is puzzling; the R23 workload appears to favor the 5655G’s architecture, possibly due to thermal or power management characteristics, despite the 5800X3D’s higher core count.

The PassMark suite amplifies the 5800X3D’s dominance in throughput-heavy tasks. It leads by 32.4% in multi-thread (28309 vs 19129), 23.8% in integer math (88608 vs 67561), and 22.9% in floating-point math (50100 vs 38649). The 5800X3D also crushes the 5655G in find prime numbers (227 vs 49, a 78.4% delta) and physics (2884 vs 686, a 76.2% delta), indicating a strong advantage in repetitive, cache-sensitive computation. Data compression (329688 vs 255608) and encryption (20258 vs 15253) follow the same trend, with the 5800X3D leading by 22.5% and 24.7%, respectively.

Single-thread scores outside of R23 are nearly identical. The 5655G edges out the 5800X3D in PassMark single-thread by a negligible 0.2% (3241 vs 3234). This suggests that for everyday responsiveness, the two are essentially matched, and the R23 single-core result is an outlier rather than a consistent pattern.

Where Each One Wins

The Ryzen 5 PRO 5655G wins in 5 head-to-head tests, while the Ryzen 7 5800X3D wins in 10. The 5655G’s victories are centered on single-core and mixed-core workloads: Cinebench R15 single-core, Cinebench R23 single-core, Cinebench R23 multi-core, and both PassMark single-thread tests. Its strong showing in R23 multi-core is notable, as it suggests the 6-core/12-thread part can outperform the 8-core/16-thread part in certain modern rendering workloads.

The 5800X3D’s wins are concentrated in traditional multi-threaded and specialized computational tasks. It dominates in Cinebench R15 multi-core, all PassMark multi-threaded metrics (compression, encryption, extended instructions, prime numbers, floating-point, integer, physics, random string sorting). These results point to a processor that excels in long-running, compute-intensive tasks, where its 96 MB of L3 cache (shared) can retain more working data than the 5655G’s 16 MB L3.

For users, the split is clear: the 5655G is the choice for workloads that are short, single-threaded, or specific to Cinebench R23’s rendering engine. The 5800X3D is the choice for video encoding, scientific computing, data compression, and any task that scales with cores and cache.

Architecture Differences

Both processors use the Zen 3 architecture on a 7 nm TSMC process, but their physical designs diverge significantly. The Ryzen 5 PRO 5655G is based on the Cezanne codename, which integrates the CPU and a Radeon Vega 7 GPU on a single die. This die is 180 mm² and contains 10,700 million transistors. The Ryzen 7 5800X3D uses the Vermeer codename, which is a chiplet design with a 74 mm² compute die containing 8,850 million transistors. The 5800X3D does not have integrated graphics.

The most significant architectural difference is cache. The 5655G has 16 MB of L3 cache, while the 5800X3D has 96 MB of shared L3 cache. This 3D-stacked cache is the defining feature of the 5800X3D, and it explains its superior performance in cache-sensitive workloads like find prime numbers and physics. The 5655G’s smaller cache is offset by its higher base clock and the fact that it includes an iGPU, making it a more versatile system-on-chip.

Memory bandwidth is identical at 51.2 GB/s for both, as is dual-channel DDR4 support. However, the PCIe implementation differs: the 5655G supports Gen 3 with 16 lanes (CPU only), while the 5800X3D supports Gen 4 with 20 lanes. This gives the 5800X3D an advantage for modern GPUs and NVMe storage.

Specification Differences

The core and thread counts are the first differentiator: 6 cores/12 threads for the 5655G versus 8 cores/16 threads for the 5800X3D. Base clocks are 3.90 GHz and 3.40 GHz, respectively, while boost clocks are 4.40 GHz and 4.50 GHz. The TDP is also distinct: 65 watts for the 5655G versus 105 watts for the 5800X3D.

The cache configuration is a major split, with the 5655G offering 64 KB L1 per core and 512 KB L2 per core, plus 16 MB L3. The 5800X3D has the same L1 and L2 per core, but its L3 is 96 MB (shared). The 5655G includes integrated Radeon Vega 7 graphics; the 5800X3D has none.

The 5655G was released in May 2024 and is currently active in production. The 5800X3D was released in April 2022 and is now end-of-life. The 5800X3D has a launch MSRP of $449; the 5655G has no listed launch MSRP. Both processors have locked multipliers and support ECC memory.

FAQ

Q: Which processor has a higher single-core score in Cinebench R23?

A: The AMD Ryzen 5 PRO 5655G, scoring 2435 versus the Ryzen 7 5800X3D’s 1452, a 67.7% difference.

Q: Does the Ryzen 7 5800X3D always beat the Ryzen 5 PRO 5655G in multi-core tests?

A: No. The 5800X3D wins in Cinebench R15 multi-core (2413 vs 1738) and PassMark multi-thread (28309 vs 19129), but the 5655G wins in Cinebench R23 multi-core (17249 vs 14317).

Q: What is the TDP difference between the two chips?

A: The Ryzen 5 PRO 5655G has a TDP of 65 watts, while the Ryzen 7 5800X3D has a TDP of 105 watts.

Q: Which processor has more L3 cache?

A: The Ryzen 7 5800X3D has 96 MB of shared L3 cache, compared to the Ryzen 5 PRO 5655G’s 16 MB.

Q: Do both processors support ECC memory?

A: Yes, both the AMD Ryzen 5 PRO 5655G and the AMD Ryzen 7 5800X3D support ECC memory.

Q: Which processor includes integrated graphics?

A: Only the AMD Ryzen 5 PRO 5655G includes Radeon Vega 7 integrated graphics. The Ryzen 7 5800X3D does not have an iGPU.

The Verdict

The data suggests that the Ryzen 7 5800X3D is the superior processor for heavy, multi-threaded workloads and cache-intensive computations. Its 32.4% lead in PassMark multi-thread and 22.5% lead in data compression are decisive, and its 96 MB L3 cache is a clear asset for scientific or server-like tasks. The 5800X3D is the pick for users who prioritize raw throughput in rendering, encoding, or data analysis, and who can accommodate its 105-watt TDP and lack of integrated graphics.

The Ryzen 5 PRO 5655G is the better choice for scenarios where single-core performance is paramount, as evidenced by its 67.7% lead in Cinebench R23 single-core. Its win in Cinebench R23 multi-core is also intriguing, suggesting that some modern applications may not fully utilize the 5800X3D’s extra cores. The 5655G is also the only option with an iGPU, making it suitable for systems without a discrete graphics card. Its lower 65-watt TDP and active production status make it a more forward-looking, power-efficient platform choice.

Ultimately, the verdict hinges on workload. For a general-purpose system with occasional gaming and productivity, the 5655G’s balanced scores and iGPU make it a versatile choice. For a dedicated workstation or a gaming rig where the GPU is separate and the priority is maximum multi-threaded performance, the 5800X3D’s cache and core count deliver a clear advantage, despite its end-of-life status. The near-identical single-thread PassMark scores (3241 vs 3234) mean everyday responsiveness will feel similar; the difference manifests only under sustained, parallel load.