AMD EPYC 7452 vs AMD Ryzen 9 PRO 7945 Comparison

FAQ

Q: Which processor has the higher core count?

A: The AMD EPYC 7452 has 32 cores and 64 threads, while the AMD Ryzen 9 PRO 7945 has 12 cores and 24 threads. The EPYC's core count is more than double that of the Ryzen.

Q: How does the memory bandwidth compare?

A: The EPYC 7452 delivers 204.8 GB/s of memory bandwidth over an eight-channel DDR4 bus, whereas the Ryzen 9 PRO 7945 reaches 83.2 GB/s over a dual-channel DDR5 bus. The EPYC's bandwidth is roughly 2.5 times higher.

Q: Which processor is based on a newer architecture?

A: The Ryzen 9 PRO 7945 uses Zen 4 architecture on a 5 nm process (codenamed Raphael), while the EPYC 7452 uses Zen 2 on a 7 nm process (codenamed Rome). The Ryzen is the newer design by generation.

Q: Did the Ryzen 9 PRO 7945 win every benchmark?

A: Yes, in the head-to-head results, the Ryzen 9 PRO 7945 won all six Cinebench tests (R15, R20, and R23, both single-core and multi-core). The deltaPct was 1.7% or 1.8% in every case.

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

A: The Ryzen 9 PRO 7945 has a TDP of 65 watts, while the EPYC 7452 has a TDP of 155 watts. The EPYC draws more than twice the power budget.

Q: Does either chip support ECC memory?

A: Both processors support ECC memory. The Ryzen 9 PRO 7945 supports ECC with DDR5, and the EPYC 7452 supports ECC with DDR4.

Architecture Differences

The AMD Ryzen 9 PRO 7945 and AMD EPYC 7452 represent two distinct design philosophies within AMD's server/workstation lineup. The Ryzen 9 PRO 7945 is built on Zen 4 architecture, codenamed Raphael, manufactured on a 5 nm process by TSMC with 13,140 million transistors spread across a 2x 71 mm² die configuration. In contrast, the EPYC 7452 uses Zen 2 architecture, codenamed Rome, on a 7 nm process with 3,800 million transistors on a single 74 mm² die.

Cache organization differs substantially. The Ryzen 9 PRO 7945 allocates 64 KB of L1 cache per core, 1 MB of L2 cache per core, and 64 MB of shared L3 cache. The EPYC 7452 provides 96 KB of L1 per core, 512 KB of L2 per core, and 128 MB of shared L3 cache — double the L3 capacity, though with a smaller per-core L2 allocation.

Memory architecture is a major separator. The Ryzen 9 PRO 7945 supports DDR5 memory over a dual-channel bus, yielding 83.2 GB/s of bandwidth. The EPYC 7452 supports DDR4 across an eight-channel bus, delivering 204.8 GB/s — a 2.46x bandwidth advantage. The Ryzen 9 PRO 7945 also integrates Radeon Graphics, while the EPYC 7452 has no integrated graphics. PCIe capability differs as well: the Ryzen offers Gen 5 with 24 lanes (CPU only), whereas the EPYC provides Gen 4 without a lane count specified. Both CPUs support ECC memory, both are locked (multiplier unlocked: false), and both are classified for the server/workstation market segment.

The sockets are incompatible: AMD Socket AM5 for the Ryzen 9 PRO 7945 versus AMD Socket SP3 for the EPYC 7452. Clock speeds tell the story of their different roles — the Ryzen 9 PRO 7945 runs at a base of 3.70 GHz and boosts to 5.40 GHz, while the EPYC 7452 sits at 2.20 GHz base and 3.35 GHz boost. The Ryzen's boost clock is 61% higher, reflecting its focus on single-thread responsiveness, while the EPYC's lower clocks are a trade-off for its massive core count.

Head-to-Head Benchmarks

The head-to-head results are remarkably consistent: the AMD Ryzen 9 PRO 7945 wins all six Cinebench tests, but by narrow margins. In Cinebench R15 multi-core, the Ryzen scores 3996 against the EPYC's 3930, a 1.7% advantage. Single-core R15 shows 564 versus 554, a 1.8% edge. Moving to Cinebench R20, the Ryzen posts 16654 versus 16377 in multi-core (1.7% lead) and 2351 versus 2312 in single-core (1.7% lead). The trend continues in Cinebench R23: multi-core 39653 versus 38993 (1.7% lead) and single-core 5598 versus 5505 (1.7% lead).

These margins are tight — the largest gap is 1.8% in R15 single-core, and the smallest is 1.7% across most tests. The consistency is striking: the Ryzen 9 PRO 7945 maintains nearly the same relative advantage in every workload, suggesting a uniform performance edge rather than workload-specific strengths. In absolute terms, the Ryzen's 39653 R23 multi-core score and 5598 R23 single-core score both exceed the EPYC's 38993 and 5505 respectively.

The average benchmark score for the Ryzen 9 PRO 7945 is 11469, while the EPYC 7452 averages 11279 — a difference of 190 points, or about 1.7%. This aligns with the per-test deltas. The Ryzen's percentile ranking is 67 against all CPUs, while the EPYC sits at 66, a modest one-percentile separation. Notably, the Ryzen 9 PRO 7945's nearest rivals include the Intel Xeon Gold 6342 (avg score 11574, delta -0.9%), the AMD EPYC 73F3 (11334, delta 1.2%), and the AMD EPYC 7402 (11312, delta 1.4%). The EPYC 7452's nearest rivals include the Intel Core i5-1145G7 (11279, delta 0%), the AMD EPYC 7402 (11312, delta -0.3%), and the AMD EPYC 73F3 (11334, delta -0.5%).

The data indicates the Ryzen 9 PRO 7945 is the faster chip in every measured scenario, but the advantage is small enough that real-world application differences would likely be minor. The EPYC 7452's much larger core count (32 vs 12) does not translate into a multi-core win in these Cinebench tests — the Ryzen's newer architecture and higher clocks compensate for its fewer cores.

The Verdict

The benchmark data points to a clear, if narrow, winner: the AMD Ryzen 9 PRO 7945 outperforms the AMD EPYC 7452 in all six Cinebench tests, with deltas between 1.7% and 1.8%. The Ryzen 9 PRO 7945 achieves this with 12 cores and 24 threads at a 65-watt TDP, while the EPYC 7452 uses 32 cores and 64 threads at 155 watts. In every single-core and multi-core test, the Ryzen posts the higher score.

The Ryzen 9 PRO 7945 is also the more efficient performer in this comparison. Its average benchmark score of 11469 comes from a 65-watt part, whereas the EPYC 7452's 11279 average requires 155 watts. The Ryzen's 5.40 GHz boost clock versus the EPYC's 3.35 GHz boost clock explains much of this efficiency — higher clocks on a newer 5 nm process deliver competitive or better performance at less than half the power envelope.

Who should choose which? From the data alone, the Ryzen 9 PRO 7945 is the better choice for workloads that prioritize raw Cinebench performance per watt, or where single-thread speed matters — its 5598 R23 single-core score versus 5505 for the EPYC confirms this. The EPYC 7452, however, offers 32 cores and 128 MB of L3 cache, which could benefit workloads that scale beyond what the benchmarks capture, though the data does not show such an advantage in these specific tests. For users who need eight-channel DDR4 memory bandwidth (204.8 GB/s) or PCIe Gen 4 connectivity, the EPYC 7452 is the only option of the two. The Ryzen 9 PRO 7945's DDR5 dual-channel (83.2 GB/s) and PCIe Gen 5 are newer but provide less aggregate bandwidth.

Given the consistent 1.7% lead across all tests and the substantially lower TDP, the Ryzen 9 PRO 7945 is the superior processor in this head-to-head based on the measured benchmarks.

Specification Differences

The two processors differ across nearly every specification category:

• Cores: 12 (Ryzen 9 PRO 7945) vs 32 (EPYC 7452)
• Threads: 24 vs 64
• Base clock: 3.70 GHz vs 2.20 GHz
• Boost clock: 5.40 GHz vs 3.35 GHz
• TDP: 65 W vs 155 W
• Socket: AMD Socket AM5 vs AMD Socket SP3
• Architecture: Zen 4 vs Zen 2
• Codename: Raphael vs Rome
• Process node: 5 nm vs 7 nm
• Transistors: 13,140 million vs 3,800 million
• Die size: 2x 71 mm² vs 74 mm²
• L1 cache: 64 KB per core vs 96 KB per core
• L2 cache: 1 MB per core vs 512 KB per core
• L3 cache: 64 MB shared vs 128 MB shared
• Memory support: DDR5 vs DDR4
• Memory bus: Dual-channel vs Eight-channel
• Memory bandwidth: 83.2 GB/s vs 204.8 GB/s
• PCIe: Gen 5, 24 Lanes (CPU only) vs Gen 4
• Integrated graphics: Radeon Graphics vs none
• Release date: 2023-06-12 vs 2019-08-06
• Part number: 100-000000598 vs 100-000000057

Fields that are the same include manufacturer (AMD), ECC memory support (true for both), market segment (Server/Workstation for both), production status (Active for both), and multiplier unlocked (false for both). Neither processor has a listed launch MSRP.

Where Each One Wins

The AMD Ryzen 9 PRO 7945 wins in every benchmark category measured: Cinebench R15, R20, and R23, both single-core and multi-core. Its wins are consistent at 1.7% to 1.8% deltas. The Ryzen 9 PRO 7945 also wins on efficiency — its 65-watt TDP delivers higher benchmark scores than the EPYC's 155-watt TDP. For workloads that are latency-sensitive or depend on high boost clocks (5.40 GHz versus 3.35 GHz), the Ryzen 9 PRO 7945 is the preferred part. Its newer Zen 4 architecture and 5 nm process also suggest better performance per transistor, with 13,140 million transistors versus 3,800 million.

The AMD EPYC 7452 wins on specifications that the benchmarks do not directly reward. It offers 32 cores versus 12, 64 threads versus 24, and 128 MB of L3 cache versus 64 MB. Its memory bandwidth of 204.8 GB/s over eight channels is 2.46 times the Ryzen's 83.2 GB/s, which could benefit memory-intensive server workloads not represented in Cinebench. The EPYC's DDR4 support may be preferable for systems already invested in that memory standard. Its PCIe Gen 4 interface, while older than Gen 5, provides broad platform compatibility. The EPYC 7452 also has a larger L1 cache per core (96 KB versus 64 KB), though its L2 is half the size (512 KB versus 1 MB per core). For scale-out compute that leverages many threads and large shared L3, the EPYC 7452's architecture is designed to handle that class of work, even if Cinebench does not show a multi-core advantage.

In terms of nearest rivals, the Ryzen 9 PRO 7945 sits 0.9% below the Intel Xeon Gold 6342 (11574) and 1.2% above the AMD EPYC 73F3 (11334). The EPYC 7452 sits exactly level with the Intel Core i5-1145G7 (11279) and 0.3% below the AMD EPYC 7402 (11312). These reference points place both chips in the same performance tier, with the Ryzen 9 PRO 7945 holding a slight edge overall.