AMD EPYC 9175F vs AMD Ryzen 9 PRO 9955 Comparison

Head-to-Head Benchmarks

The recorded data presents a clear split between these two AMD processors. The AMD EPYC 9175F dominates the multi-threaded and throughput-oriented workloads, while the AMD Ryzen 9 PRO 9955 takes the single-thread crown. Across the eleven benchmark comparisons in the database, the EPYC 9175F wins nine, while the Ryzen 9 PRO 9955 wins two.

The most lopsided result comes in the PassMark physics test. The EPYC 9175F scores 9984, while the Ryzen 9 PRO 9955 scores 3332. That is a delta of -66.6 percent from the Ryzen's perspective, meaning the EPYC more than triples the Ryzen's output in this simulation-heavy workload. This is the single largest gap in the entire comparison, and it reflects the EPYC's much higher core count and thread count: 16 cores and 32 threads versus 12 cores and 24 threads.

In prime number finding, the EPYC 9175F again shows a commanding lead. It scores 741 versus the Ryzen's 461, a delta of -37.8 percent. This workload scales well with core count and memory bandwidth, both areas where the EPYC holds a substantial advantage. The random string sorting test shows a -24.9 percent delta, with the EPYC scoring 95783 against the Ryzen's 71928. Data compression follows at -21.1 percent, with the EPYC at 867186 and the Ryzen at 684470.

Extended instruction performance favors the EPYC by -22.2 percent, scoring 70529 versus 54903. Data encryption shows a -20.2 percent delta, with the EPYC at 42297 and the Ryzen at 33754. The multithread benchmark, which is often a proxy for overall parallel performance, gives the EPYC a -18.9 percent advantage: 67634 versus 54866. Integer math sees the EPYC at 219800 against 182312, a -17.1 percent delta, while floating point math gives the EPYC 145939 versus 121509, a -16.7 percent delta.

The Ryzen 9 PRO 9955's two wins come in the single-thread tests. Both the PassMark single-thread and singlethread entries record identical scores of 4597 for the Ryzen and 4256 for the EPYC. That gives the Ryzen an 8 percent advantage in each. This is a meaningful result for workloads that rely on high clock speeds and low latency rather than sheer parallel throughput.

Looking at the broader benchmark landscape, the Ryzen 9 PRO 9955 sits at the 97th percentile among all CPUs, while the EPYC 9175F sits at the 96th percentile. The average benchmark score for the Ryzen is 110612, compared to 95615 for the EPYC. This discrepancy between the average scores and the head-to-head results is worth noting: the Ryzen's average is bolstered by its strong single-thread performance, while the EPYC's average is pulled down by the same single-thread deficit, even though it wins most parallel workloads.

Where Each One Wins

The EPYC 9175F is the clear choice for any workload that can utilize more than a dozen cores. Its 16 cores and 32 threads give it a structural advantage in parallel processing. The physics test, which shows a 66.6 percent gap, is the most extreme example. Prime number finding, data compression, encryption, extended instructions, random string sorting, integer math, floating point math, and the multithread benchmark all favor the EPYC by margins ranging from 16.7 percent to 37.8 percent. If the task involves heavy computation across multiple threads, the data consistently points to the EPYC.

The Ryzen 9 PRO 9955 wins in single-thread performance, and by an 8 percent margin in both recorded single-thread tests. This matters for applications that are latency-sensitive or that have limited parallelism. Database queries, certain scripting workloads, and interactive server tasks may benefit from the Ryzen's higher single-thread score. Its boost clock of 5.40 GHz, compared to the EPYC's 5.00 GHz, aligns with this advantage, though the database only records the scores, not the clock contributions directly.

The socket difference also shapes where each processor fits. The Ryzen 9 PRO 9955 uses AMD Socket AM5 and supports dual-channel DDR5 memory with 89.6 GB/s bandwidth. The EPYC 9175F uses AMD Socket SP5 and supports twelve-channel DDR5 memory with 576.0 GB/s bandwidth. The EPYC's memory bandwidth is more than six times higher, which helps explain its dominance in memory-intensive tests like prime number finding and random string sorting. The Ryzen's lower memory bandwidth, while adequate for many tasks, becomes a bottleneck in these parallel workloads.

PCIe lane counts also differ substantially. The Ryzen offers 24 PCIe Gen 5 lanes from the CPU, while the EPYC offers 128 PCIe Gen 5 lanes. For systems that need many NVMe drives, GPUs, or network cards, the EPYC's lane budget is far more accommodating. The Ryzen's integrated Radeon Graphics provides a display output option, while the EPYC has no integrated graphics, which is typical for server processors.

Architecture Differences

Both processors are built on the Zen 5 architecture, but they are distinct implementations. The Ryzen 9 PRO 9955 comes from the Granite Ridge codename, part of the 9000 series, while the EPYC 9175F comes from the Turin codename, part of the EPYC 9005 series. Both use a 4 nm process from TSMC, but the transistor counts and die configurations differ dramatically.

The Ryzen 9 PRO 9955 packs 16,630 million transistors across a die size of 2x 70.6 mm². The EPYC 9175F contains 133,040 million transistors across 16x 70.6 mm². The EPYC's transistor count is roughly eight times higher, and its total die area is eight times larger as well. This reflects the EPYC's much larger core count and massive shared L3 cache.

Cache configurations highlight another major divergence. The Ryzen 9 PRO 9955 has 80 KB of L1 cache per core, 1 MB of L2 per core, and 64 MB of L3 cache. The EPYC 9175F also has 80 KB of L1 per core and 1 MB of L2 per core, but its L3 cache is 512 MB and shared. That is eight times the L3 capacity of the Ryzen. For workloads that repeatedly access large datasets, the EPYC's enormous L3 cache reduces memory traffic and improves performance, as seen in the data compression and encryption tests.

Clock speeds tell a complementary story. The Ryzen 9 PRO 9955 has a base clock of 3.40 GHz and a boost clock of 5.40 GHz. The EPYC 9175F has a base clock of 4.20 GHz and a boost clock of 5.00 GHz. The EPYC's higher base clock helps it sustain performance under multi-threaded loads, while the Ryzen's higher boost clock explains its single-thread win. The EPYC's TDP is 320 watts, compared to the Ryzen's 120 watts. The EPYC draws significantly more power to feed its extra cores and cache, which is expected for a server part.

Memory controllers also differ in scale. The Ryzen uses a dual-channel DDR5 controller with 89.6 GB/s bandwidth, while the EPYC uses a twelve-channel DDR5 controller with 576.0 GB/s bandwidth. This is not merely a specification difference; it fundamentally changes what each processor can do. The EPYC can feed its 16 cores with data far faster than the Ryzen can feed its 12 cores. Both support ECC memory, which is essential for server and workstation reliability.

The Ryzen 9 PRO 9955 includes Radeon Graphics, making it a self-contained solution for systems that need a display. The EPYC 9175F has no integrated graphics, which is standard for its segment. Both processors have locked multipliers, so neither supports user overclocking. The Ryzen was released on 2026-06-29, while the EPYC was released on 2024-10-09. The EPYC's launch MSRP is $4256; the Ryzen's launch MSRP is not recorded in the database.

The Verdict

The data dictates a clear split based on workload type. For multi-threaded, memory-hungry server workloads, the AMD EPYC 9175F is the superior processor. It wins nine of the eleven head-to-head benchmarks, with margins ranging from 16.7 percent in floating point math to 66.6 percent in physics. Its 16 cores, 32 threads, 512 MB shared L3 cache, twelve-channel memory, and 128 PCIe Gen 5 lanes make it a formidable platform for virtualization, scientific computing, data analytics, and any other parallel workload. The 320-watt TDP is a consideration, but for a server socket with this capability, that is the expected trade-off.

For single-threaded performance and lower power consumption, the AMD Ryzen 9 PRO 9955 is the better fit. It leads by 8 percent in both recorded single-thread tests, and its 120-watt TDP is less than half that of the EPYC. The 5.40 GHz boost clock gives it an edge in latency-sensitive tasks. The integrated Radeon Graphics simplifies system build-out for workstations that need display output. The 64 MB L3 cache and dual-channel memory are sufficient for many workstation workloads, though they cannot match the EPYC's massive memory subsystem.

The average benchmark scores tell a nuanced story. The Ryzen 9 PRO 9955 averages 110612 across all recorded benchmarks, which is 15.7 percent higher than the EPYC's 95615. This is because the Ryzen's single-thread advantage is weighted heavily in the average, while the EPYC's wins in parallel workloads are spread across individual tests. The Ryzen also sits at the 97th percentile versus the EPYC's 96th, a marginal difference that underscores how close these processors are in overall standing.

The nearest rivals in the database confirm the positioning. The Ryzen 9 PRO 9955's closest competitor is the Intel Xeon w7-2595X, with an average score of 108663 and a delta of 1.8 percent in the Ryzen's favor. The Intel Xeon w7-3555 trails by 4.2 percent, while the AMD Ryzen 9 9850HX trails by 3.9 percent. The Intel Xeon 6527P is ahead by 4 percent. The EPYC 9175F's closest rivals are the AMD EPYC 4565P at -0.2 percent, the AMD Ryzen 9 PRO 9945 at -0.5 percent, and the Intel Xeon 6520P at 1.9 percent ahead. These tight deltas show that both processors are competitive within their respective segments.

Pick the EPYC 9175F if the workload is parallel, the dataset is large, or the system needs extensive I/O. Pick the Ryzen 9 PRO 9955 if single-thread speed, lower power draw, or integrated graphics matter more. The data supports both choices, but never for the same reason.

FAQ

Q: Which processor wins in single-thread performance?

A: The AMD Ryzen 9 PRO 9955 wins both recorded single-thread tests with a score of 4597, giving it an 8 percent advantage over the AMD EPYC 9175F's 4256.

Q: What is the largest performance gap between the two processors?

A: The largest gap is in the PassMark physics test, where the AMD EPYC 9175F scores 9984 versus the AMD Ryzen 9 PRO 9955's 3332, a delta of -66.6 percent from the Ryzen's perspective.

Q: How do the cache sizes compare?

A: Both processors have 80 KB of L1 cache per core and 1 MB of L2 cache per core. The AMD Ryzen 9 PRO 9955 has 64 MB of L3 cache, while the AMD EPYC 9175F has 512 MB of shared L3 cache.

Q: What memory bandwidth does each processor support?

A: The AMD Ryzen 9 PRO 9955 supports dual-channel DDR5 with 89.6 GB/s bandwidth. The AMD EPYC 9175F supports twelve-channel DDR5 with 576.0 GB/s bandwidth.

Q: Which processor has more PCIe lanes?

A: The AMD EPYC 9175F has 128 PCIe Gen 5 lanes from the CPU, while the AMD Ryzen 9 PRO 9955 has 24 PCIe Gen 5 lanes from the CPU.

Q: What are the core and thread counts?

A: The AMD Ryzen 9 PRO 9955 has 12 cores and 24 threads. The AMD EPYC 9175F has 16 cores and 32 threads.