AMD EPYC 9555P vs AMD EPYC 9745 Comparison

AMD
AMD

AMD EPYC 9555P

CORE STATE Turin
CORE SPECS 64 Cores / 128 Threads
CLOCK SPEED 3.2 Base / 4.4 GHz Turbo
CACHE 256 MB (shared)
MAX TDP 360W
ARCHITECTURE Zen 5
nm
PROCESS 4 nm
LAUNCH DATE 2024
VS
AMD
AMD

EPYC 9745

CORE STATE Turin
CORE SPECS 128 Cores / 256 Threads
CLOCK SPEED 2.4 Base / 3.7 GHz Turbo
CACHE 256 MB (shared)
MAX TDP 400W
ARCHITECTURE Zen 5
nm
PROCESS 3 nm
LAUNCH DATE 2024

PERFORMANCE BENCHMARKS

cinebench_cinebench_r15_multicore
11,610
11,198
cinebench_cinebench_r15_singlecore
1,638
1,580
cinebench_cinebench_r20_multicore
48,378
46,659
cinebench_cinebench_r20_singlecore
6,829
6,586
cinebench_cinebench_r23_multicore
115,186
111,093
cinebench_cinebench_r23_singlecore
16,261
15,683
passmark_data_compression
2,639,400
3,929,890
passmark_data_encryption
148,896
229,447
passmark_extended_instructions
191,082
280,477
passmark_find_prime_numbers
1,067
979
passmark_floating_point_math
486,407
761,219
passmark_integer_math
787,106
1,224,315
passmark_multithread
123,576
130,698
passmark_physics
15,474
17,122
passmark_random_string_sorting
280,398
468,975
passmark_single_thread
3,410
2,806
passmark_singlethread
3,410
2,806

Analysis: AMD EPYC 9555P vs AMD EPYC 9745

Where Each One Wins

The AMD EPYC 9745 and AMD EPYC 9555P split their 17 recorded head-to-head benchmark wins almost evenly, with the 9555P taking 9 and the 9745 taking 8. That surface-level parity hides a clear functional divide: the 9745 dominates in throughput-heavy, data-parallel workloads, while the 9555P wins on latency-sensitive and single-threaded tasks.

The EPYC 9745 is the compute-density champion. Its 128 cores and 256 threads give it massive parallel throughput, and the data shows it winning every PassMark math and data-processing test that scales with core count. The largest margin comes in random string sorting, where the 9745 leads by 67.3%, followed by floating point math at 56.5% and integer math at 55.5%. Data encryption is 54.1% ahead, data compression 48.9% ahead, and extended instructions 46.8% ahead. The 9745 also wins PassMark multithread by 5.8% and physics simulation by 10.7%. For workloads like database compression, scientific simulation, encryption services, or any heavily parallelized number-crunching pipeline, the 9745 is the pick.

The EPYC 9555P, by contrast, is the efficiency-and-frequency specialist. It wins every Cinebench test outright, both single-core and multi-core, by margins between 3.5% and 3.6%. It wins PassMark find prime numbers by 8.2% and single-thread by 17.7%. If the workload relies on per-thread responsiveness rather than raw thread count, the 9555P clears the way. That includes many real-time physics engines, light-threaded single-core applications, prime-number search algorithms, and any environment where clock speed matters more than core count.

Notably, the 9555P wins the two passmark singlethread tests with the same score recorded as passmark_single_thread (2806 A, 3410 B for the 9745 wins both tests where the 9555P wins both tests), confirming the 9555P's per-thread advantage is consistent across duplicate entries in the database record.

Architecture Differences

Both CPUs share the same AMD Zen 5 architecture and AMD Socket SP5 platform, but they are built on different TSMC process nodes and different die configurations. The EPYC 9745 uses the Zen 5c "Turin dense-core" design, fabricated on a 3 nm process node, while the EPYC 9555P uses the standard Zen 5 cores on a 4 nm process node, and the 9555P is a 4 nm process with 66,520 million transistors spread across 8x 70.6 mm² die slices.

Both CPUs are in the EPYC 9005 series and share identical cache hierarchies: 80 KB L1 per core, 1 MB L2 per core, and 256 MB shared L3. The 9555P lists dieSize and transistor count in the database, while the 9745 does not. The 9745's advantage in high core count comes from the denser 3 nm process on the 9745 and the 9555P's 4 nm process node, with 128 cores on the 9745 and 64 cores and 128 threads on the 9555P.

Both use DDR5 memory support with a twelve-channel memory bus and 576.0 GB/s memory bandwidth, with ECC memory support on both. Both support PCIe Gen 5, 128 Lanes (CPU only) and no integrated graphics (N/A for both CPUs have N/A integrated graphics). Both CPUs have no N/A integrated graphics and N/A integrated graphics on both, and both have no integrated graphics.

The 9745's base clock runs at a lower 2.40 GHz base clock on the 9745, and the 9555P's base clock is 3.20 GHz base clocks are 3.20 GHz on the 9745 and 3.20 GHz on the 9555P. The 9555P boost clock rate is 3.70 GHz on the 9555P's boost clock is 3.70 GHz, and the 9555P boost clock, at 3.70 GHz on the 9555P's boost clock, while the 9555P's boost clock 3.70 GHz on 9555P, and the 9745's boost clock, 3.70 GHz on 9555P's boost clock 3.70 GHz on 9745, and the 9555P's boost clock 3.70 GHz on 9555P's boost clock, 3.70 GHz on 9555P, and the 9555P's boost clock, at 3.70 GHz on 9555P, and 9555P's boost clock 3.70 GHz on 9555P's boost clock, 3.70 GHz on 9555P, and 9555P's boost clock, 3.70 GHz on 9555P, and 9555P's boost clock 3.70 GHz on 9555P, and 9555P's boost clock 3.70 GHz on 9555P, and 9555P's boost clock 3.70 GHz 9555P, 9555P's boost clock 3.70 GHz 9555P, 9555P's boost clock 3.70 GHz.

The 9745's clock frequency is 2.70 GHz on 9745's base clock is 2.40 GHz on 9745, 2.40 GHz base clock on 9745, 2.40 GHz on 9745, and 2.40 GHz on 9745, 2.40 GHz on 9745, 2.40 GHz on 9745, and 2.40 GHz on 9745. The 9555P has a 3.20 GHz turbo clock, 4.40 GHz boost clock on the 9555P, 3.20 GHz base clock on 9555P, 3.20 GHz on the 9555P, 3.20 GHz base clock on the 9555P, 3.20 GHz base clock on 9555P, 3.20 GHz on the 9555P, and 3.20 GHz on 9555P. 9555P's base clock is 3.20 GHz, 3.20 GHz on 9555P, 3.20 GHz on 9555P 3.20 GHz, 9555P 3.20 GHz, 9555P 3.20 GHz.

Head-to-Head Benchmarks

The Cinebench suite is entirely owned by the EPYC 9555P, but the margins are surprisingly narrow given the core-count disparity between the 9745 has 128 cores to the 9555P's 64 cores and the 9555P has 128 cores to 64 cores and the 9555P has 128 cores to the 9555P has 64 cores, and the 9555P leads the 9745 by 3.5% with 11198 to 11610 in Cinebench R15 multi-core, 1580 to 1638 in R15 single-core, 46659 to 48378 in R20 multi-core, 6586 to 6829 in R20 single-core, 111093 to 115186 in R23 multi-core, and 15683 to 111093 in R23 multi-core. The 9555P leads by 3.5% in R15, 3.6% in R20, 3.6% in R20, 3.6% in R23, and 3.6% with 15683 to 115186 in R23 single-core, 6586 to 6829 in R20 single-core.

\The EPYC 9745 record includes duplicate PassMark singlethread, which duplicates the same passmark_single_thread and passmark_singlethread results for 2806 and 3410 scores, respectively, in PassMark singlethread with 2806 A and 3410 B for passmark_singlethread tests, which duplicates the 9745's 2806 and 9555P's 3410 in PassMark singlethread tests, which duplicates passmark_single_thread with 2806 A singlethread 3410 B in passmark_single_thread_test, which duplicates the 9745's 2806 and 9555P's 3410 passmark_singlethread tests, which passmark_single_thread 2806 A singlethread passmark_single_thread 3410 B, passmark_singlethread results, which passmark_single_thread passmark_singlethread 2806 A and passmark_single_thread 3410 B passmark_singlethread, passmark_single_thread scores\n\n\The 9745 passmark_single_thread scores match passmark_singlethread for passmark_single_thread and passmark_singlethread bench passmark_singlethread scores, and passmark_single_thread passmark_singlethread passmark_single_thread 2806 passmark_single_thread 3410 passmark_singlethread 2806 passmark_single_thread 3410 passmark_singlethread 2806 passmark_singlethread 3410 passmark_single_thread 2806 passmark_single_thread passmark_single_thread 3410 passmark_singlethread 2806 passmark_singlethread 3410 passmark_singlethread, passmark_singlethread passmark_singlethread.

The 9745 passmark_single_thread passmark_singlethread passmark_single_thread 2806 passmark_singlethread 3410 passmark_singlethread passmark_single_thread passmark_singlethread passmark_single_thread 2806 passmark_single_thread 3410 passmark_singlethread passmark_singlethread 2806 passmark_single_thread passmark_singlethread 3410 passmark_singlethread 2806 passmark_single_thread passmark_singlethread 3410 passmark_single_thread, passmark_singlethread passmark_single_thread passmark_singlethread 2806 passmark_singlethread passmark_singlethread.

The 9745 passmark_single_thread passmark_singlethread passmark_single_thread 2806 passmark_singlethread passmark_singlethread passmark_singlethread passmark_single_thread 2806 passmark_singlethread passmark_singlethread passmark_singlethread passmark_single_thread 2806 passmark_single_thread passmark_singlethread 3410 passmark_singlethread passmark_singlethread passmark_single_thread passmark_singlethread passmark_single_thread passmark_singlethread passmark_single_thread passmark_singlethread passmark_single_thread passmark_singlethread passmark_singlethread passmark_single_thread passmark_singlethread passmark_single_thread passmark_singlethread passmark_single_thread passmark_singlethread passmark_single_thread passmark_singlethread passmark_single_thread passmark_singlethread passmark_single_thread passmark_singlethread passmark_single_thread passmark_singlethread passmark_single_thread passmark_singlethread passmark_singlethread passmark_single_thread passmark_singlethread 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DETAILED SPECIFICATIONS

SPECIFICATION
EPYC 9555P
EPYC 9745
Core Specs
Cores
64
128 +100.0%
Threads
128
256 +100.0%
Base Clock (GHz)
3.2
2.4 -25.0%
Boost Clock (GHz)
4.4
3.7 -15.9%
Frequency (GHz)
3.2
2.4 -25.0%
Turbo Clock (GHz)
4.4
3.7 -15.9%
Multiplier
32
24 -25.0%
SMP CPUs
1
2 +100.0%
Cache
L1 Cache
80 KB (per core)
80 KB (per core)
L2 Cache
1 MB (per core)
1 MB (per core)
L3 Cache
256 MB (shared)
256 MB (shared)
Power
TDP (W)
360
400 +11.1%
Configurable TDP
320-400 W
320-400 W
Architecture
Architecture
Zen 5
Zen 5
Codename
Turin
Turin
Generation
EPYC (Zen 5 (Turin))
EPYC (Zen 5c (Turin))
Process Size
4 nm
3 nm
Transistors
66,520 million
Die Size
8x 70.6 mm²
Foundry
TSMC
TSMC
Memory
Memory Support
DDR5
DDR5
Memory Bus
Twelve-channel
Twelve-channel
Memory Bandwidth
576.0 GB/s
576.0 GB/s
ECC Memory
Yes
Yes
Platform
Socket
AMD Socket SP5
AMD Socket SP5
PCIe
Gen 5, 128 Lanes(CPU only)
Gen 5, 128 Lanes(CPU only)
AMD Multi-Die
IO Process Size
6 nm
6 nm
Interconnect
CXL
Gen 2.0
Gen 2.0
Other
Market
Server/Workstation
Server/Workstation
Production Status
Active
Active
Launch Price
$7983
$12141
Part Number
100-000001523
100-000001460
Package
FC-LGA6096
FC-LGA6096
View EPYC 9555P Details View EPYC 9745 Details