AMD EPYC 8434P vs Intel Xeon w9-3595X Comparison

The Verdict

The Intel Xeon w9-3595X is the dominant performer in this pairing, winning 15 of 16 head-to-head benchmark comparisons. Its average benchmark score of 209,881 places it in the 99th percentile of all CPUs, while the AMD EPYC 8434P sits at 146,881 in the 98th percentile. The Intel part leads by roughly 43% in average score, with the largest wins coming in prime number finding (94.6% ahead) and floating point math (75.7% ahead). The AMD EPYC 8434P takes exactly one benchmark, data encryption, where it beats the Intel chip by 5.1%.

For users who need maximum multi-threaded throughput, the Xeon w9-3595X is the clear choice. Its Cinebench R23 multicore score of 84,304 versus 56,516 for the EPYC represents a 49.2% advantage, and the PassMark multithread result of 99,576 versus 66,490 shows a 49.8% gap. The Intel chip also carries a 99th percentile ranking versus 98th for AMD, so it sits at the very top of the database's overall distribution.

The AMD EPYC 8434P is a different proposition. It consumes 200W TDP versus 385W for the Intel part, and its nearest rivals in the database include the AMD Ryzen Threadripper PRO 9965WX (0.1% behind) and AMD Ryzen 9 PRO 9965 (0.8% behind). That places it in a competitive mid-range workstation tier, not the absolute top. The EPYC's single win in data encryption (97,254 versus 92,249) suggests it holds an edge in cryptographic workloads, but everywhere else it trails substantially.

The verdict from the data is straightforward. The Xeon w9-3595X is for those who prioritize raw compute, with a 385W TDP, 60 cores, and a 4.80 GHz boost clock. The EPYC 8434P is for efficiency-focused deployments that still need 48 cores and 96 threads, with a 200W TDP and a 2.50 GHz base clock. The Intel launch MSRP is $5889, and the AMD launch MSRP is $2700, but the performance gap follows the price gap.

FAQ

Q: Which CPU wins more head-to-head benchmarks?

A: The Intel Xeon w9-3595X wins 15 of 16 comparisons. The AMD EPYC 9 8434P wins 1 of 16 comparisons, specifically the PassMark data encryption test.

Q: How large is the multi-core performance difference?

A: In Cinebench R23 multicore, the Intel Xeon w9-3595X scores 84,304 versus 56,516 for the AMD EPYC 8434P, a 49.2% lead for Intel. PassMark multithread shows 99,576 for Intel and 66,490 for AMD, a 49.8% gap.

Q: Is the AMD EPYC 8434P better in single-core performance?

A: No. The Intel Xeon w9-3595X leads in PassMark single-thread with 3,720 versus 2,448, a 52% advantage. Cinebench R23 singlecore shows 7,978 for the AMD EPYC and 4,998 for Intel, but the head-to-head delta for the R15 singlecore test lists a 49.1% Intel win.

Q: How do the two chips compare in memory bandwidth?

A: The Intel Xeon w9-3595X supports eight-channel DDR5 with 307.2 GB/s bandwidth. The AMD EPYC 8434P supports six-channel DDR5 with 230.4 GB/s bandwidth. Both support ECC memory.

Q: What is the closest rival to the AMD EPYC 8434P?

A: The AMD Ryzen Threadripper PRO 9965WX is 0.1% behind the EPYC 8434P in average score. The AMD Ryzen 9 PRO 9965 is 0.8% behind, and the AMD EPYC 7643P is 1.4% behind.

Q: What is the closest rival to the Intel Xeon w9-3595X?

A: The AMD EPYC 9455P has an average score 3.7% higher than the Xeon w9-3595X. The Intel Xeon 6741P is 7.7% behind, and the AMD EPYC 9335 is 8.1% behind.

Architecture Differences

The Intel Xeon w9-3595X uses the Sapphire Rapids codename, built on a 10 nm process at Intel's own foundry. The die is composed of 4x 477 mm² tiles. The AMD EPYC 8434P uses the Zen 4c architecture with the Siena codename, fabricated on a 5 nm process at TSMC, with a die size of 4x 73 mm² and 35,500 million transistors. The process node difference is significant: 10 nm for Intel versus 5 nm for AMD, and the die sizes are dramatically different, with Intel using far larger tiles.

Cache layouts differ substantially between the two. The Intel part has 80 KB of L1 per core, 2 MB of L2 per core, and 112.5 MB of L3. The AMD part has 64 KB of L1 per core, 1 MB of L2 per core, and 128 MB of shared L3. The total L3 cache capacity favors AMD at 128 MB versus 112.5 MB for Intel, but Intel's per-core L2 allocation per core is double AMD's.

The Intel Xeon w9-3595X has an unlocked multiplier unlocked, indicating it is multiplier-unlocked. The AMD EPYC 8434P has multiplierUnlocked false for multiplierUnlocked field shows false, meaning it is not unlocked, it is locked. The Intel part number is SRN71, and the AMD part number is 100-000000877.

Memory architecture is another key difference. The Intel chip uses eight-channel DDR5 memory, while the AMD chip uses six-channel. PCIe lanes also differ: Intel offers Gen 5 with 112 lanes (CPU only), while AMD offers Gen 5 with 96 lanes (CPU only). The Intel Xeon has no integrated graphics, and the AMD EPYC has no integratedGraphics field recorded.

Specification Differences

The core and thread counts are the most immediate spec difference. The Intel Xeon w9-3595X has 60 cores and 120 threads. The AMD EPYC 8434P has 48 cores and 96 threads. The Intel chip has a base clock of 2.00 GHz and a boost clock of 4.80 GHz. The AMD chip has a base clock of 2.50 GHz and a boost clock of 3.10 GHz. The Intel chip has the higher boost clock by 1.70 GHz, while the AMD chip has a 0.50 GHz higher base clock.

TDP is a major differentiator. The Intel Xeon w9-3595X is rated at 385W, while the AMD EPYC 8434P is rated at 200W. The AMD part consumes nearly half the power envelope. Sockets are incompatible: Intel uses Socket 4677, and AMD uses Socket SP6.

Release dates place the AMD EPYC 8434P in the market first, with a release date of 2023-09-17, while the Intel Xeon w9-3595X arrived later on 2024-08-23. Both are listed as Active production status. The Intel launch MSRP is $5889, and the AMD launch MSRP is $2700.

The memory bus width differs, with Intel at eight-channel and AMD at six-channel. Memory bandwidth follows: Intel at 307.2 GB/s versus AMD at 230.4 GB/s. Both support DDR5 and ECC memory.

The market segment for both is Server/Workstation. The Intel generation is listed as Xeon W (Sapphire Rapids), and the AMD generation is EPYC (Zen 4c (Siena)).

Head-to-Head Benchmarks

The Cinebench suite is where the Intel Xeon w9-3595X establishes its largest consistent advantages. In Cinebench R15 multicore, Intel scores 8,497 versus 5,696 for AMD, a 49.2% delta. R15 singlecore shows 1,199 versus 804 for AMD, a 49.1% delta. R20 multicore repeats the same 49.2% pattern with 35,407 for Intel and 23,736 for AMD. R20 singlecore follows with 4,998 for Intel versus 3,350 for AMD, also a 49.2% delta. Cinebench R23 multicore continues the trend at 84,304 for Intel against 56,516 for AMD, again 49.2% ahead.

PassMark's extended instructions test is the biggest single win for Intel outside Cinebench. Intel scores 142,785 versus 86,189 for AMD, a 65.7% advantage. Prime number finding is even more lopsided: Intel at 580 and AMD at 298, a 94.6% delta. Floating point math amplification is significant too, with Intel at 379,008 and AMD at 215,669, 75.7% ahead. Integer math shows a 473,573, with Intel at 473,507 and AMD at 385,290, a 22.9% edge. Random string sorting sits at 190,745 for Intel and 125,932 for AMD, 51.5% ahead, and physics is 5,842 versus 4,036 for AMD, a 44.7% delta. PassMark multithread is one of the larger gaps at 99,576 versus 66,490, 49.8% in favor of Intel. Single-thread and singlethread both show 3,720 for Intel and 2,448 for AMD, a 52% advantage.

Data compression is a smaller Intel win, 1,831,962 versus 1,412,835 for AMD, a 29.7% delta. The only AMD victory is in data encryption, where the EPYC 8434P scores 97,254 against 92,249 for Intel, a 5.1% advantage. That is the sole bright spot for AMD in the entire head-to-head set.

The average benchmark scores tell the same story: Intel at 209,881 versus AMD at 146,881, a difference of 63,000 points. The Intel Xeon w9-3595X ranks in the 99th percentile of all CPUs, while the AMD EPYC 8434P ranks in the 98th percentile. The nearest rival to the Intel part is the AMD EPYC 9455P, with a 3.7% higher average score, followed by the Intel Xeon 6741P at 7.7% behind. The nearest rival to the AMD part, the AMD Ryzen Threadripper PRO 9965WX at 0.1% behind, shows just how close the AMD EPYC 8434P is to the Threadripper territory. Every database measurement, across 16 tests, favors Intel except the one encryption test, and the overall record points to a clear hardware hierarchy.