AMD EPYC 9745 vs Intel Xeon 6774P Comparison

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 9745 has 128 cores and 256 threads, while the Intel Xeon 6774P has 64 cores and 128 threads. The AMD part doubles the core and thread counts.

Q: What is the difference in average benchmark scores?

A: The AMD EPYC 9745 records an average benchmark score of 425,973, while the Intel Xeon 6774P scores 300,372. The AMD part sits at the 100th percentile among all CPUs, whereas the Intel part is at the 99th percentile.

Q: How do the two compare in single-thread performance?

A: The Intel Xeon 6774P leads in single-thread tests. In Passmark single-thread, Intel scores 3,047 versus AMD’s 2,806, a 7.9% advantage for Intel. The same margin appears in the repeat Passmark singlethread test.

Q: Which processor wins in multi-threaded workloads?

A: The AMD EPYC 9745 wins all multi-threaded benchmarks in the head-to-head list. For example, in Cinebench R23 multi-core, AMD scores 111,093 versus Intel’s 95,836, a 15.9% lead.

Q: What are the memory channel configurations?

A: The AMD EPYC 9745 uses a twelve-channel memory bus with 576.0 GB/s bandwidth. The Intel Xeon 6774P uses an eight-channel memory bus with 409.6 GB/s bandwidth.

Q: What are the launch MSRP values?

A: The AMD EPYC 9745 has a launch MSRP of $12141. The Intel Xeon 6774P has a launch MSRP of $6760.

Architecture Differences

The AMD EPYC 9745 is built on the Zen 5 architecture, codenamed Turin, and belongs to the EPYC 9005 series. It uses a 3 nm process node from TSMC. In contrast, the Intel Xeon 6774P is based on Granite Rapids, part of the Xeon 6 (Granite Rapids-SP) generation, and uses a 5 nm process node from Intel’s own foundry. This process difference likely contributes to the AMD part’s higher core density and efficiency.

The cache hierarchies differ notably. The AMD EPYC 9745 has 80 KB of L1 cache per core, 1 MB of L2 cache per core, and 256 MB of shared L3 cache. The Intel Xeon 6774P has 112 KB of L1 per core, 2 MB of L2 per core, and 336 MB of shared L3 cache. Intel provides more cache per core and a larger total L3 pool, while AMD’s overall design relies on more cores with smaller per-core caches.

Memory architecture also separates the two. AMD uses a twelve-channel DDR5 memory bus with 576.0 GB/s bandwidth, while Intel uses an eight-channel DDR5 bus with 409.6 GB/s bandwidth. Both support ECC memory, but AMD’s wider bus gives it a theoretical bandwidth advantage of roughly 40% in the recorded specifications.

PCIe lane counts differ as well. The AMD EPYC 9745 offers Gen 5 with 128 lanes (CPU only). The Intel Xeon 6774P offers Gen 5 with 136 lanes (CPU only). Intel provides eight additional lanes, which could matter for systems requiring more direct I/O connectivity.

Physical packaging and sockets diverge completely. AMD uses Socket SP5, while Intel uses Socket 4710. The Intel die size is listed as 2x 598 mm², but no die size is recorded for AMD. Both processors have no integrated graphics and are locked (multiplier not unlocked). Production status is Active for both.

The release dates differ by about seven months. AMD launched on 2024-10-09, while Intel launched on 2025-05-21. Both are current server/workstation parts.

Head-to-Head Benchmarks

The head-to-head data shows a decisive overall win for the AMD EPYC 9745, taking 11 of 14 benchmark comparisons. The Intel Xeon 6774P wins only 3 tests, all in single-thread or prime-number workloads.

Starting with multi-core rendering, the AMD part leads consistently across Cinebench versions. In Cinebench R15 multi-core, AMD scores 11,198 versus Intel’s 9,660, a 15.9% advantage. The same 15.9% delta appears in Cinebench R20 (46,659 vs 40,251) and Cinebench R23 (111,093 vs 95,836). This consistent margin across all three Cinebench versions suggests a stable multi-threaded advantage for AMD, likely driven by the doubled core count.

Passmark integer math shows the largest gap. AMD scores 1,224,315 versus Intel’s 593,440, a 106.3% lead. This means AMD more than doubles Intel’s integer throughput, a massive win for compute-heavy integer workloads. Data encryption also heavily favors AMD: 229,447 versus 115,025, a 99.5% delta. Data compression shows a 70.1% lead for AMD (3,929,890 vs 2,309,868). Floating-point math favors AMD by 63.6% (761,219 vs 465,314). Extended instructions (SIMD-heavy workloads) go to AMD by 58.2% (280,477 vs 177,273). Random string sorting, a memory-latency-sensitive test, favors AMD by 78.7% (468,975 vs 262,417).

Passmark multithread shows AMD ahead by 15.9% (130,698 vs 112,749), matching the Cinebench delta. Physics performance is closer: AMD wins by 6.9% (17,122 vs 16,023), a narrow margin compared to other multi-threaded tests.

The Intel Xeon 6774P wins in Passmark find prime numbers, scoring 1,264 versus AMD’s 979, a 22.5% advantage for Intel. This test often favors higher per-core clock speeds and integer latency, and Intel’s higher boost clock of 3.90 GHz versus AMD’s 3.70 GHz likely plays a role. Intel also wins both single-thread tests (Passmark single-thread and singlethread) with 3,047 versus 2,806, a 7.9% lead.

The overall picture: AMD dominates in throughput-oriented workloads, especially those scaling with core count, while Intel holds a smaller but real edge in single-thread and prime-number iteration. The AMD part’s 106.3% integer math lead is the standout result, indicating that for most server workloads, the core count advantage translates directly into performance.

Specification Differences

The two processors differ in many specification fields. Core count: AMD has 128, Intel has 64. Threads: AMD has 256, Intel has 128. Base clock: AMD runs at 2.40 GHz, Intel at 2.50 GHz. Boost clock: AMD reaches 3.70 GHz, Intel reaches 3.90 GHz. TDP: AMD is rated at 400 W, Intel at 350 W.

Process node: AMD uses 3 nm (TSMC), Intel uses 5 nm (Intel foundry). Socket: AMD uses Socket SP5, Intel uses Socket 4710. The Intel die size is 2x 598 mm², while AMD’s die size is not recorded. L1 cache per core: AMD has 80 KB, Intel has 112 KB. L2 cache per core: AMD has 1 MB, Intel has 2 MB. L3 cache: AMD has 256 MB shared, Intel has 336 MB shared.

Memory bus: AMD is twelve-channel, Intel is eight-channel. Memory bandwidth: AMD has 576.0 GB/s, Intel has 409.6 GB/s. PCIe lanes: AMD has 128 lanes (Gen 5), Intel has 136 lanes (Gen 5). Launch MSRP: AMD is $12141, Intel is $6760. Release date: AMD launched 2024-10-09, Intel launched 2025-05-21. Part numbers differ: AMD is 100-000001460, Intel is SRWPC.

Both support DDR5 memory, have ECC support, no integrated graphics, and are locked multipliers. Both are Active in production and target the server/workstation segment.

Where Each One Wins

The AMD EPYC 9745 wins in nearly every throughput-oriented scenario. Data centers running virtualized workloads, database servers, scientific computing, and large-scale batch processing will benefit from the 128 cores and 256 threads. The 106.3% lead in integer math is particularly relevant for general-purpose compute, financial modeling, and any workload that relies on integer operations. The 99.5% lead in data encryption suggests strong performance for secure communications, VPN gateways, and encrypted storage. The 70.1% lead in data compression points to advantages in file servers, backup systems, and data warehousing. The 63.6% lead in floating-point math makes it suitable for simulations, machine learning inference, and rendering tasks. The 78.7% lead in random string sorting indicates strong memory access patterns for sorting-heavy applications like analytics.

The Intel Xeon 6774P wins in single-thread-dominated workloads. Its 7.9% single-thread lead makes it the choice for legacy applications that rely on a single core, latency-sensitive transaction processing, or lightly threaded code that cannot scale across many cores. The 22.5% lead in find prime numbers suggests Intel has an edge in algorithms that repeatedly access small data sets with high clock speeds. Its higher base clock (2.50 GHz vs 2.40 GHz) and boost clock (3.90 GHz vs 3.70 GHz) support this. Intel also offers more PCIe lanes (136 vs 128), which could benefit systems with many NVMe drives or GPUs requiring direct I/O. The lower TDP (350 W vs 400 W) means the Intel part may fit into power-constrained racks, though the AMD part’s higher core count may still deliver better performance per watt in multi-threaded loads, though that metric is not directly recorded.

The Verdict

The data points to a clear performance hierarchy. The AMD EPYC 9745 wins 11 of 14 head-to-head benchmarks, including all multi-threaded tests and all throughput-heavy Passmark workloads. Its average benchmark score of 425,973 puts it at the 100th percentile among all CPUs, while the Intel Xeon 6774P sits at 300,372 and the 99th percentile. The AMD part’s nearest rival is the AMD Ryzen Threadripper PRO 9995WX with an average score of 412,068, a 3.4% delta in AMD’s favor. The Intel part’s nearest rival is the AMD EPYC 9734 with an average score of 310,619, meaning Intel trails that rival by 3.3%.

For buyers prioritizing raw multi-threaded performance, the AMD EPYC 9745 is the superior choice. The 128 cores and 256 threads deliver a 15.9% lead in Cinebench R23 and a 106.3% lead in integer math. The twelve-channel memory bus with 576.0 GB/s bandwidth provides a substantial memory throughput advantage over Intel’s 409.6 GB/s. The 3 nm process node likely enables the higher core count within the 400 W TDP.

For buyers with single-threaded or lightly threaded workloads, the Intel Xeon 6774P offers a meaningful edge. The 7.9% single-thread lead and 22.5% prime-number advantage are measurable. The lower TDP of 350 W versus 400 W could matter in dense deployments. The eight additional PCIe lanes may benefit I/O-heavy configurations. However, the Intel part’s average benchmark score is significantly lower, and it trails the AMD EPYC 9734, an older AMD part, by 3.3%.

The launch MSRP difference is notable: AMD at $12141 versus Intel at $6760. But the recorded data shows AMD delivering more than double the integer throughput and nearly double the encryption performance, so the higher price corresponds to higher measured output. The choice depends entirely on workload: AMD for massive parallelism and memory bandwidth, Intel for single-thread latency and lower power draw. The benchmark results indicate that for most server workloads, the AMD EPYC 9745 will complete tasks faster, while the Intel Xeon 6774P will excel in niche single-thread scenarios.