AMD EPYC 4545P vs AMD Ryzen 7 PRO 9745 Comparison

The AMD EPYC 4545P and AMD Ryzen 7 PRO 9745 are both 65-watt, dual-channel AM5 processors built on TSMC's 4 nm node, yet they target different corners of the server/workstation market. The EPYC 4545P is a 16-core/32-thread Zen 5 part with a 64 MB L3 cache, while the Ryzen 7 PRO 9745 is an 8-core/16-thread Zen 5 part with a 32 MB L3 cache. Benchmark data shows the EPYC 4545P wins 9 of 11 head-to-head tests, with the Ryzen 7 PRO 9745 taking only the two single-thread tests. The average benchmark scores are close—75,373 for the EPYC versus 74,761 for the Ryzen—but the distribution of wins reveals a clear split: the EPYC dominates parallel workloads while the Ryzen leads in latency-sensitive single-core tasks.

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 4545P has 16 cores and 32 threads, exactly double the Ryzen 7 PRO 9745's 8 cores and 16 threads.

Q: How does the single-thread performance compare?

A: The Ryzen 7 PRO 9745 wins the PassMark single-thread test with a score of 4,624, which is 6.6% higher than the EPYC 4545P's score of 4,318.

Q: What is the largest benchmark margin between the two?

A: The biggest win for the EPYC 4545P is in PassMark integer math, where it scores 213,485 versus 124,167 for the Ryzen 7 PRO 9745, a 71.9% advantage.

Q: Do both processors support ECC memory?

A: Yes, both the AMD EPYC 4545P and the AMD Ryzen 7 PRO 9745 support ECC memory, and both use DDR5 with dual-channel memory buses.

Q: What are the release dates for these two CPUs?

A: The AMD EPYC 4545P was released on May 12, 2025, while the AMD Ryzen 7 PRO 9745 was released later, on September 15, 2025.

Q: Are these processors in the same performance percentile?

A: Yes, both the EPYC 4545P and the Ryzen 7 PRO 9745 are in the 95th percentile of all CPUs according to benchmark data.

Where Each One Wins

The AMD EPYC 4545P is the clear victor in multi-threaded and data-heavy workloads. Its 16 cores and 64 MB L3 cache deliver a 40.1% advantage in PassMark multithread (53,504 vs 38,201) and a 50% lead in random string sorting (73,850 vs 49,219). The EPYC also wins data compression by 39.2% (636,279 vs 457,211) and floating-point math by 53.4% (126,505 vs 82,461), making it the better choice for scientific computing, database operations, and any parallel processing task. The largest margin is in integer math, where the EPYC scores 71.9% higher, and encryption shows a 64.6% gap in its favor. For server workloads with many concurrent threads, the EPYC 4545P is the stronger part.

The AMD Ryzen 7 PRO 9745 wins only the two single-thread tests: PassMark single-thread and PassMark singlethread, both scoring 4,624 versus the EPYC's 4,318, a 6.6% margin. This advantage stems from its higher base clock of 3.80 GHz compared to the EPYC's 3.00 GHz, even though both boost to 5.40 GHz. This makes the Ryzen 7 PRO 9745 better suited for lightly threaded workloads, latency-sensitive applications, or tasks that rely on per-core responsiveness rather than raw core count. For a workstation handling interactive workloads or single-threaded legacy software, the Ryzen's edge matters.

Architecture Differences

Both processors are built on the same Zen 5 architecture and TSMC 4 nm process, but they use different chip configurations. The EPYC 4545P has a codename of "Grado" and is part of the EPYC 4005 series, while the Ryzen 7 PRO 9745 uses "Granite Ridge" and belongs to the Ryzen 9000 series. The EPYC 4545P uses a dual-chiplet design with a die size of 2x 70.6 mm², totaling 16,630 million transistors. The Ryzen 7 PRO 9745 uses a single chiplet with a die size of 70.6 mm² and 8,315 million transistors—exactly half the transistor count.

The cache hierarchy differs significantly. Both have 80 KB of L1 and 1 MB of L2 per core, but the L3 cache is 64 MB on the EPYC 4545P versus 32 MB (shared) on the Ryzen 7 PRO 9745. This doubling of L3 cache directly supports the EPYC's superior multi-threaded performance, as more working set can reside on-chip. Both processors lack 3D V-Cache, and neither has an unlocked multiplier. Both are fabricated by TSMC at 4 nm, and both include integrated Radeon Graphics, a feature typically absent from server CPUs.

Specification Differences

The core and thread counts are the most obvious difference: 16 cores/32 threads for the EPYC 4545P versus 8 cores/16 threads for the Ryzen 7 PRO 9745. Base clocks differ, with the Ryzen 7 PRO 9745 starting at 3.80 GHz and the EPYC 4545P at 3.00 GHz, but both boost to 5.40 GHz. The L3 cache is 64 MB on the EPYC versus 32 MB shared on the Ryzen. Transistor counts are 16,630 million versus 8,315 million, and die size is 2x 70.6 mm² versus a single 70.6 mm².

The EPYC 4545P has a launch MSRP of $549, while the Ryzen 7 PRO 9745 has no listed launch MSRP. Both have a TDP of 65 watts, use the AMD Socket AM5, support DDR5 with dual-channel memory bus, and provide 89.6 GB/s of memory bandwidth. Both support ECC memory and offer Gen 5 PCIe with 24 CPU lanes. The EPYC 4545P has a release date of May 12, 2025, and the Ryzen 7 PRO 9745 on September 15, 2025. Both are marked as Active production and target the Server/Workstation market segment.

Head-to-Head Benchmarks

The EPYC 4545P's most dominant win is in PassMark integer math, scoring 213,485 against 124,167 for the Ryzen 7 PRO 9745, a 71.9% margin. This reflects the core-count advantage, as integer math scales nearly linearly with cores. Data encryption shows a 64.6% gap (37,598 vs 22,848), and physics simulation scores 60.9% higher (3,260 vs 2,026). Floating-point math is 53.4% ahead (126,505 vs 82,461), while prime number finding is 55.3% higher (292 vs 188). Random string sorting shows a 50% advantage (73,850 vs 49,219).

The EPYC 4545P also leads in the broader synthetic tests. PassMark multithread scores 53,504 versus 38,201, a 40.1% advantage. Extended instructions are 25.6% higher (46,231 vs 36,800), and data compression is 39.2% better (636,279 vs 457,211). These results indicate that the EPYC 4545P is consistently 25-70% faster across all multi-threaded workloads, with the largest gaps in integer-heavy and encryption tasks.

The Ryzen 7 PRO 9745 wins only the single-thread tests, scoring 4,624 versus 4,318 in PassMark single-thread, a 6.6% advantage. This is a modest but consistent lead, driven by the higher base clock. The average benchmark scores reflect the overall parity: the EPYC 4545P averages 75,373, which is 0.8% above its rival's 74,761. The EPYC 4545P's nearest rival is the Intel Core Ultra 9 285 at 75,488 (0.2% higher), while the Ryzen 7 PRO 9745's nearest rival is the AMD Ryzen 9 9950X at 74,640 (0.2% lower). Both processors sit in the 95th percentile of all CPUs, confirming that despite the core-count disparity, the single-thread advantage of the Ryzen 7 PRO 9745 keeps it competitive in the overall benchmark landscape.