AMD EPYC 7343 vs Intel Core Ultra 9 275HX Comparison

Head-to-Head Benchmarks

The benchmark data shows a clear majority of wins for the Intel Core Ultra 9 275HX, taking 12 of the 17 recorded head-to-head tests. However, the AMD EPYC 7343 secures 5 wins, and some of those are decisive in specific workloads.

The largest victory for the Intel chip appears in PassMark floating point math, where it scores 191186 against 86311 for the AMD EPYC, a margin of 121.5%. That is an exceptional gap, more than double the AMD result. The Intel advantage is also pronounced in PassMark single-thread performance, with a score of 4713 versus 2740, a delta of 72%. The same Intel figure appears twice in the database (as passmark_single_thread and passmark_singlethread), confirming the same measured result.

In Cinebench R15 multicore, the Intel leads with a score of 5619.5 versus 3739, a 50.3% advantage. The Cinebench R20 multicore test shows a 27.7% lead for Intel (19899 versus 15580), and the same delta appears in R20 singlecore, where Intel scores 2809 against 2199. Those are two consistent wins for the Intel part in the R20 suite. PassMark multithread follows with Intel at 55759 versus 43644, a 27.8% win. Extended instructions go to Intel by 32% (47016 versus 35626), data encryption by 25.8% (47112 versus 37454), data compression by 3.2% (608381 versus 589770), find prime numbers by 17.3% (448 versus 382), and random string sorting by 10% (74320 versus 67576).

The AMD EPYC 7343 counters with its own notable wins. In Cinebench R23 singlecore, the AMD scores 5237 against Intel's 2204, a 57.9% advantage. That is the largest single-core margin in the entire comparison. In Cinebench R23 multicore, the AMD also takes the win: 37097 versus 35589, a 4.1% lead. The AMD wins PassMark physics by 30.1% (4774 vs 3338) and integer math by a slim 0.5% (156033 versus 155218). The remaining AMD win is Cinebench R15 singlecore, where it scores 527 against Intel's 334, a 36.6% margin.

Notably, the Intel wins in Cinebench R15 multicore by 50.3%, but the AMD wins in R23 multicore by 4.1%. The two Cinebench versions do not agree on the multicore leader. The database shows the AMD wins in the older singlecore test (R15) and the newer singlecore test (R23), but the Intel takes R20 singlecore. This pattern suggests the AMD's single-core strengths are consistent in R15 and R23, while the R20 test favors the Intel clock speed.

The overall benchmark average for the Intel is 67469, placing it in the 94th percentile of all CPUs. The AMD EPYC 7343 averages 64202, in the 93rd percentile. The Intel sits just 0.3% below the Intel Xeon w5-3525 and 0.5% below the AMD EPYC 4484PX, while being 0.7% above the Intel Xeon 6515P. The AMD EPYC 7343 is 0.2% above the Core i9-13900KS and 0.7% above the Ryzen AI Max PRO 390, but 0.4% below the Core Ultra 7 265F and 0.7% below the Core Ultra 7 265. These deltas show both chips are tightly grouped with their nearest rivals, with the Intel sitting within 1% of four competitors and the AMD within 1% of four different ones.

Architecture Differences

The two processors come from different fabrication and design generations. The Intel Core Ultra 9 275HX is built on a 3 nm process at TSMC, while the AMD EPYC 7343 uses a 7 nm process, also at TSMC. The Intel's die size is listed as 243 mm², the AMD has a multi-die package of four times 81 mm², totaling 324 mm². Transistor counts are close: the Intel has 17,800 million, the AMD has 16,600 million.

The Intel uses 24 cores and 24 threads (no simultaneous multithreading), while the AMD uses 16 cores and 32 threads (SMT enabled). This gives the AMD a thread advantage despite fewer physical cores. The Intel's base clock is 2.70 GHz, boost 5.40 GHz; the AMD runs at 3.20 GHz base and 3.90 GHz boost. The AMD has a higher base clock but a much lower boost ceiling.

Cache architecture is another major split. The Intel has 192 KB L1 per core, 3 MB per core L2, and 36 MB shared L3. The AMD has 64 KB L1 per core, 512 KB per core L2, but a massive 128 MB shared L3. That 128 MB L3 is more than triple the Intel's L3, which helps the AMD in workloads with large working sets.

Memory support differs completely: the Intel uses DDR5 with a dual-channel bus and 102.4 GB/s bandwidth, while the AMD uses DDR4 with an eight-channel bus and 204.8 GB/s bandwidth. The AMD offers twice the memory bandwidth despite older memory technology. The AMD also supports ECC memory; the Intel does not.

PCIe lanes show a huge gap. The Intel provides Gen 5 with 20 CPU lanes, while the AMD provides Gen 4 with 128 CPU lanes. The AMD's lane count is 6.4 times higher. The Intel has integrated graphics (Arc Xe-LPG Graphics 64EU), the AMD has none. The AMD is a server/workstation part on an AMD Socket SP3, while the Intel is a mobile part on a BGA 2114 socket.

The Intel's multiplier is unlocked, allowing overclocking, while the AMD's is locked. The Intel's TDP is 55 watts, the AMD's is 190 watts, a difference of 135 watts. The AMD's power envelope is over three times the Intel's, which aligns with its server positioning.

FAQ

Q: Which processor has higher single-core Cinebench R23 performance?

A: The AMD EPYC 7343 wins with a score of 5237 against the Intel's 2204, a margin of 57.9%.

Q: Does the Intel Core Ultra 9 275HX always win multi-core benchmarks?

A: No. The AMD EPYC 7343 takes Cinebench R23 multicore with 37097 vs 35589 (a 4.1% lead), while the Intel wins Cinebench R15 multicore (5619.5 vs 3739, 50.3%), R20 multicore (19899 vs 15580, 27.7%), and PassMark multithread (55759 vs 43644, 27.8%).

Q: What is the memory bandwidth advantage?

A: The AMD EPYC 7343 has 204.8 GB/s bandwidth via eight-channel DDR4, double the Intel's 102.4 GB/s via dual-channel DDR5.

Q: Which processor supports ECC memory?

A: The AMD EPYC 7343 supports ECC memory; the Intel Core Ultra 9 275HX does not.

Q: How many PCIe lanes does each CPU provide?

A: The AMD EPYC 7343 offers 128 PCIe Gen 4 lanes (CPU only), while the Intel Core Ultra 9 275HX offers 20 PCIe Gen 5 lanes (CPU only).

Q: What is the transistor count difference?

A: The Intel has 17,800 million transistors, the AMD has 16,600 million, a difference of 1,200 million in the Intel's favor.

Specification Differences

• Cores: 24 (Intel) vs 16 (AMD)
• Threads: 24 (Intel) vs 32 (AMD)
• Base clock: 2.70 GHz (Intel) vs 3.20 GHz (AMD)
• Boost clock: 5.40 GHz (Intel) vs 3.90 GHz (AMD)
• TDP: 55 W (Intel) vs 190 W (AMD)
• Process node: 3 nm (Intel) vs 7 nm (AMD)
• Die size: 243 mm² (Intel) vs 4x 81 mm² (AMD)
• L1 cache: 192 KB per core (Intel) vs 64 KB per core (AMD)
• L2 cache: 3 MB per core (Intel) vs 512 KB per core (AMD)
• L3 cache: 36 MB shared (Intel) vs 128 MB shared (AMD)
• Memory support: DDR5 (Intel) vs DDR4 (AMD)
• Memory bus: Dual-channel (Intel) vs Eight-channel (AMD)
• Memory bandwidth: 102.4 GB/s (Intel) vs 204.8 GB/s (AMD)
• ECC memory: False (Intel) vs True (AMD)
• PCIe: Gen 5, 20 lanes (Intel) vs Gen 4, 128 lanes (AMD)
• Integrated graphics: 64EU Arc Xe-LPG (Intel) vs None (AMD)
• Socket: BGA 2114 (Intel) vs SP3 (AMD)
• Multiplier unlocked: True (Intel) vs False (AMD)
• Release date: 2025-01-12 (Intel) vs 2021-03-14 (AMD)
• Launch MSRP: None listed (Intel) vs $1565 (AMD)

Where Each One Wins

The Intel Core Ultra 9 275HX wins the majority of benchmark categories, making it the recommended choice for mobile content creation and general compute tasks that rely on floating point math, encryption, compression, and single-threaded PassMark performance. Its 121.5% lead in floating point math means it excels in scientific and engineering simulations or rendering workloads that use heavy FPU instruction throughput. The 72% lead in PassMark single-thread performance makes it strong for legacy single-threaded applications and interactive workloads.

The Intel also wins data compression (3.2% lead), data encryption (25.8% lead), extended instructions (32% lead), prime number finding (17.3% lead), random string sorting (10% lead), and multithread (27.8% lead). Its 24 physical cores and 5.4 GHz boost clock drive these results despite a 55W TDP. The integrated Arc graphics make it suitable for mobile systems that need a display output without a discrete GPU.

The AMD EPYC 7343 is the better choice for server and workstation environments where memory bandwidth, ECC reliability, and PCIe lane expansion are critical. Its 204.8 GB/s memory bandwidth is double the Intel's, and its 128 PCIe lanes allow for many more NVMe drives or GPUs. The 128 MB L3 cache gives it an edge in Cinebench R23 multicore (4.1% win) and a massive 57.9% single-core benefit in R23, indicating that the Zen 3 architecture excels in single-threaded integer and physics workloads. The AMD wins in PassMark physics by 30.1%, which uses physics simulation and benefits from the larger cache.

The AMD also wins integer math by a tiny 0.5%, showing near parity with the Intel in pure integer throughput. For data centers where ECC memory is a hard requirement, the AMD is the only option. The EPYC's 190W TDP is higher, but the server socket and 128 lanes justify the power draw for multi-GPU or multi-NVMe configurations.

For a mobile user who needs high single-core boost and flexible overclocking, the Intel is the clear winner. For a rack server handling virtual machines or database workloads that benefit from high memory bandwidth and multi-threaded throughput, the AMD's 32 threads and eight-channel memory make it the more appropriate choice. The Intel's 24 threads are still substantial, but the AMD's thread count is 25% higher (32 vs 24). The two processors target different market segments, and the benchmark results align with those design goals.