AMD Ryzen 7 PRO 5755G vs AMD Ryzen 9 PRO 5945 Comparison

Head-to-Head Benchmarks

The recorded data shows a decisive sweep in the head-to-head comparisons. The AMD Ryzen 9 PRO 5945 wins all 11 shared benchmark tests, with the largest margins appearing in heavily multithreaded workloads. The most extreme difference is in the prime number search test, where the Ryzen 9 PRO 5945 scores 228 versus the Ryzen 7 PRO 5755G's 58, a 74.6% advantage. This test is particularly sensitive to core count and memory latency, and the 12-core part clearly dominates.

In integer math, the Ryzen 9 PRO 5945 posts 129,768 against the Ryzen 7 PRO 5755G's 90,270, a 30.4% lead. Floating point math shows a similar pattern: 70,291 versus 50,778, a 27.8% gap. The multithread benchmark, which aggregates overall parallel performance, gives the Ryzen 9 PRO 5945 a 34,549 score versus 23,858 for the Ryzen 7 PRO 5755G, a 30.9% difference. Data compression results are also lopsided: 416,599 versus 295,730, a 29% edge for the Ryzen 9 PRO 5945.

The Ryzen 9 PRO 5945 also wins in encryption (26,313 versus 19,450, 26.1% ahead), extended instructions (27,031 versus 20,487, 24.2% ahead), and random string sorting (43,447 versus 32,771, 24.6% ahead). Physics simulation shows a particularly wide margin: 1,772 versus 1,022, a 42.3% lead for the Ryzen 9 PRO 5945. This test often scales with core count, and the 12-core part has a clear structural advantage.

The closest contest is in single-thread performance. The Ryzen 9 PRO 5945 scores 3,499, while the Ryzen 7 PRO 5755G scores 3,366, a modest 3.8% difference. Both parts use the same Zen 3 architecture, and the boost clock advantage of the Ryzen 9 PRO 5945 (4.70 GHz versus 4.60 GHz) explains most of this gap. Still, the Ryzen 7 PRO 5755G is not far behind in lightly threaded work, which makes it a reasonable choice for older applications that rely on a single core.

The aggregate benchmark scores reflect the overall picture. The Ryzen 7 PRO 5755G has an average benchmark score of 49,196, placing it in the 90th percentile of all CPUs. The Ryzen 9 PRO 5945 averages 47,527, also in the 90th percentile. The lower average for the Ryzen 9 PRO 5945 is due to the inclusion of Cinebench results in its benchmark set, which are not present for the Ryzen 7 PRO 5755G. The head-to-head PassMark results are the more direct comparison, and they consistently favor the Ryzen 9 PRO 5945.

Where Each One Wins

The benchmark data splits cleanly along workload type. The Ryzen 9 PRO 5945 wins every multithreaded test, and the margins grow with thread count and cache sensitivity. For rendering, video encoding, scientific computing, and database workloads, the 12-core, 24-thread configuration provides a substantial throughput advantage. The physics test, which often correlates with gaming performance in CPU-bound scenarios, shows a 42.3% lead for the Ryzen 9 PRO 5945, indicating it can handle complex simulation work much more effectively.

The Ryzen 7 PRO 5755G does not win any of the head-to-head benchmarks, but its single-thread score (3,366 versus 3,499) is close enough that day-to-day responsiveness, web browsing, and older office applications will feel nearly identical. The 8-core part also has integrated Radeon Vega 8 graphics, which means it can run without a discrete GPU, a feature the Ryzen 9 PRO 5945 lacks entirely. For basic display output, light media playback, or a low-power office build, the Ryzen 7 PRO 5755G is self-sufficient.

The Ryzen 9 PRO 5945's primary wins are in data compression (29% ahead), integer math (30.4% ahead), and multithread (30.9% ahead). These are the workloads that benefit most from 12 cores and 64 MB of L3 cache. The Ryzen 7 PRO 5755G, with its 8 cores and 16 MB of L3 cache, is not in the same league for parallel tasks. The only area where the Ryzen 7 PRO 5755G comes close is single-thread, where the 3.8% deficit is small enough to be imperceptible in most applications.

For users who prioritize maximum parallel performance, the Ryzen 9 PRO 5945 is the clear choice. For users who need an integrated GPU or who primarily run single-threaded software, the Ryzen 7 PRO 5755G offers a viable alternative, especially if a discrete graphics card is not part of the build.

Architecture Differences

Both processors are built on the Zen 3 architecture and use TSMC's 7 nm process node, but they come from different chip designs. The Ryzen 7 PRO 5755G uses the Cezanne codename, which is a monolithic die measuring 180 mm² with 10,700 million transistors. The Ryzen 9 PRO 5945 uses the Vermeer codename, which is a chiplet design with two dies, each measuring 74 mm², for a combined 8,300 million transistors. The Cezanne die is larger and has more transistors because it integrates the Radeon Vega 8 graphics, while Vermeer is a pure CPU design with no integrated GPU.

The cache hierarchy differs significantly. Both parts have 64 KB of L1 cache per core and 512 KB of L2 cache per core, but the L3 cache is much larger on the Ryzen 9 PRO 5945: 64 MB versus 16 MB on the Ryzen 7 PRO 5755G. This 4x difference in L3 cache explains part of the Ryzen 9 PRO 5945's lead in data compression and random string sorting, as larger caches reduce memory traffic for working sets that fit in the faster on-die storage.

Memory support is identical in terms of type and bus width: both support DDR4 in a dual-channel configuration with 51.2 GB/s bandwidth. However, the Ryzen 9 PRO 5945 supports ECC memory, while the Ryzen 7 PRO 5755G does not. This makes the Ryzen 9 PRO 5945 more suitable for workstation or server environments where data integrity is critical.

The PCIe implementation also differs. The Ryzen 7 PRO 5755G provides PCIe Gen 3 with 16 lanes (CPU only), while the Ryzen 9 PRO 5945 provides PCIe Gen 4 with 20 lanes (CPU only). The newer PCIe Gen 4 standard doubles the bandwidth per lane, and the extra lanes allow for more expansion devices. For users with high-end NVMe storage or multiple GPUs, the Ryzen 9 PRO 5945 has a clear platform advantage.

The base clocks differ notably: the Ryzen 7 PRO 5755G runs at 3.80 GHz base, while the Ryzen 9 PRO 5945 runs at 3.00 GHz base. The boost clocks are closer: 4.60 GHz for the Ryzen 7 PRO 5755G and 4.70 GHz for the Ryzen 9 PRO 5945. The lower base clock on the 12-core part likely reflects thermal and power management for the additional cores, but the higher boost clock gives it a slight single-thread edge.

Specification Differences

The two processors differ in several key specifications. The Ryzen 7 PRO 5755G has 8 cores and 16 threads, while the Ryzen 9 PRO 5945 has 12 cores and 24 threads. The base clock is 3.80 GHz on the Ryzen 7 PRO 5755G versus 3.00 GHz on the Ryzen 9 PRO 5945. The boost clock is 4.60 GHz on the Ryzen 7 PRO 5755G versus 4.70 GHz on the Ryzen 9 PRO 5945. Both have a 65 W TDP.

The transistor count and die size differ as described above: 10,700 million transistors on a 180 mm² die for the Ryzen 7 PRO 5755G, versus 8,300 million transistors across two 74 mm² dies for the Ryzen 9 PRO 5945. The L3 cache is 16 MB on the Ryzen 7 PRO 5755G and 64 MB on the Ryzen 9 PRO 5945. ECC memory support is absent on the Ryzen 7 PRO 5755G and present on the Ryzen 9 PRO 5945. The PCIe version is Gen 3 with 16 lanes on the Ryzen 7 PRO 5755G, and Gen 4 with 20 lanes on the Ryzen 9 PRO 5945. The Ryzen 7 PRO 5755G includes Radeon Vega 8 integrated graphics, while the Ryzen 9 PRO 5945 has no integrated graphics.

The release dates are also different: the Ryzen 7 PRO 5755G launched on 2024-09-04, while the Ryzen 9 PRO 5945 launched on 2022-04-03. Both use the AMD Socket AM4 and belong to the 5000 series. Neither is multiplier-unlocked. The part numbers are 100-000001748 for the Ryzen 7 PRO 5755G and 100-000000831 for the Ryzen 9 PRO 5945.

FAQ

Q: Which processor has a higher single-thread score?

A: The AMD Ryzen 9 PRO 5945 scores 3,499 in the PassMark single-thread test, compared to 3,366 for the AMD Ryzen 7 PRO 5755G. The difference is 3.8%.

Q: Does the Ryzen 7 PRO 5755G have integrated graphics?

A: Yes, it includes Radeon Vega 8. The Ryzen 9 PRO 5945 has no integrated graphics, so it requires a discrete GPU for display output.

Q: What is the L3 cache difference between the two?

A: The Ryzen 7 PRO 5755G has 16 MB of L3 cache, while the Ryzen 9 PRO 5945 has 64 MB. The 12-core part has four times the L3 cache.

Q: Which processor supports ECC memory?

A: Only the AMD Ryzen 9 PRO 5945 supports ECC memory. The Ryzen 7 PRO 5755G does not list ECC support.

Q: How large is the multithread performance gap?

A: The Ryzen 9 PRO 5945 scores 34,549 in the PassMark multithread test, while the Ryzen 7 PRO 5755G scores 23,858. The Ryzen 9 PRO 5945 is 30.9% ahead.

Q: Are both processors on the same socket and architecture?

A: Yes, both use AMD Socket AM4 and the Zen 3 architecture. They differ in codename (Cezanne for the Ryzen 7 PRO 5755G, Vermeer for the Ryzen 9 PRO 5945) and process node details, though both are on 7 nm from TSMC.

The Verdict

The data is unambiguous: the AMD Ryzen 9 PRO 5945 is the superior processor for multithreaded workloads. It wins all 11 head-to-head benchmarks, with margins ranging from 3.8% in single-thread to 74.6% in prime number search. The 12-core, 24-thread configuration, combined with 64 MB of L3 cache and PCIe Gen 4 support, makes it the better choice for content creation, scientific computing, data analysis, and any workload that scales with core count. Its ECC memory support also makes it suitable for workstation or server environments where data integrity is paramount.

The AMD Ryzen 7 PRO 5755G is not without merit. Its integrated Radeon Vega 8 graphics means it can function in a system without a discrete GPU, which is a significant advantage for compact or low-power builds. Its single-thread score is only 3.8% behind the Ryzen 9 PRO 5945, so everyday tasks and lightly threaded applications will feel nearly identical. The 65 W TDP on both parts means power consumption is equal, but the Ryzen 7 PRO 5755G's higher base clock (3.80 GHz versus 3.00 GHz) may offer better responsiveness in bursty single-threaded workloads.

The decision comes down to the use case. Users who need maximum parallel performance, large cache, ECC support, and modern PCIe connectivity should choose the AMD Ryzen 9 PRO 5945. Users who need an integrated GPU, prefer a monolithic die, or primarily run single-threaded software can consider the AMD Ryzen 7 PRO 5755G. The average benchmark scores place both in the 90th percentile of all CPUs, so neither is a weak choice. The Ryzen 9 PRO 5945 is simply the stronger performer across the board, and the benchmark data supports that conclusion without exception.