AMD EPYC 4484PX vs Intel Core Ultra 9 275HX Comparison

Head-to-Head Benchmarks

The benchmark data shows a split personality between these two processors. The Intel Core Ultra 9 275HX wins 12 of the 17 head-to-head tests, while the AMD EPYC 4484PX takes 5. But the margins tell a more interesting story than the raw win count.

The most dramatic result is in Cinebench R23 single-core, where the EPYC 4484PX scores 6065 against Intel's 2204 — a 175.2% advantage. That is not a small gap; it is a generational-style stomping. The R15 single-core test reinforces this, with AMD winning 611 to 334, a 82.9% lead. If your workload depends on one thread doing heavy lifting, the EPYC 4484PX is the clear choice based on these numbers.

However, the Intel part strikes back hard in floating-point math. The Core Ultra 9 275HX posts 191186 in PassMark floating-point math versus 96446 for AMD — a 49.6% deficit for the EPYC. That is the largest Intel win in the entire dataset. Data encryption also favors Intel heavily: 47112 vs 36499, a 22.5% margin. The Core Ultra 9 also wins PassMark multithread with 55759 against 50547, a 9.3% edge.

The multi-core Cinebench results are mixed. Intel wins R15 multicore by 22.9% (5619.5 vs 4330) and R20 multicore by 9.3% (19899 vs 18044). But AMD takes R23 multicore decisively, scoring 42964 against Intel's 35589 — a 20.7% win. This inconsistency across Cinebench versions suggests the two chips respond differently to the workload characteristics of each test generation.

In integer math, AMD edges out Intel 162993 vs 155218, a 5% win. Physics simulation also favors AMD: 4938 vs 3338, a 47.9% advantage. These are meaningful wins for server-style workloads. The remaining tests are closer: data compression goes to Intel by 0.8% (608381 vs 603371), extended instructions to Intel by 7.9% (47016 vs 43315), prime numbers to Intel by 5.1% (448 vs 425), and random string sorting to Intel by 3.6% (74320 vs 71642).

Single-thread PassMark favors Intel, with the Core Ultra 9 scoring 4713 against AMD's 4119 — a 12.6% lead. This contradicts the Cinebench R23 single-core result, which is worth noting: benchmark choice matters enormously when evaluating these two parts.

FAQ

Q: Which CPU has the higher average benchmark score?

A: The AMD EPYC 4484PX has an average benchmark score of 67822, while the Intel Core Ultra 9 275HX scores 67469. The difference is 0.5% in AMD's favor, placing them within a fraction of each other overall.

Q: How do these chips compare to their nearest rivals?

A: The EPYC 4484PX is 0.1% behind the AMD Ryzen Threadripper PRO 5955WX (67868), 0.2% ahead of the Intel Xeon w5-3525 (67673), and 0.4% ahead of the AMD EPYC 7352 (68118). The Core Ultra 9 275HX is 0.3% behind the same Xeon w5-3525, 0.5% behind the EPYC 4484PX, 0.6% behind the Threadripper PRO, and 0.7% ahead of the Intel Xeon 6515P.

Q: Which chip wins in physics simulation?

A: The AMD EPYC 4484PX wins PassMark physics with a score of 4938 against Intel's 3338, a 47.9% advantage. This is one of AMD's strongest results in the head-to-head data.

Q: What about floating-point performance?

A: The Intel Core Ultra 9 275HX dominates in PassMark floating-point math, scoring 191186 versus 96446 for AMD — a 49.6% lead. This is Intel's largest winning margin in any test.

Q: Does the AMD chip support ECC memory?

A: Yes, the EPYC 4484PX has ECC memory support. The Intel Core Ultra 9 275HX does not list ECC memory support in its specifications.

Q: Which chip has a higher boost clock?

A: The AMD EPYC 4484PX has a boost clock of 5.60 GHz, while the Intel Core Ultra 9 275HX boosts to 5.40 GHz. AMD's base clock is also higher at 4.40 GHz versus 2.70 GHz for Intel.

Where Each One Wins

The AMD EPYC 4484PX is the pick for single-thread-heavy workloads. The Cinebench R23 single-core result (6065 vs 2204, a 175.2% lead) is the single most lopsided metric in this comparison. Physics simulation also lands firmly in AMD's corner, with a 47.9% advantage. Integer math is another AMD win, though smaller at 5%. The R23 multicore score (42964 vs 35589) shows AMD can also win in certain multi-threaded scenarios, particularly those that resemble R23's rendering workload.

The Intel Core Ultra 9 275HX is the choice for floating-point math. The 49.6% lead in that test is massive and likely reflects the architecture's strengths in FP-heavy compute. Data encryption also goes to Intel by 22.5%, which matters for security-related workloads. The Core Ultra 9 wins the majority of the PassMark tests, including multithread (55759 vs 50547), single-thread (4713 vs 4119), data compression, extended instructions, prime numbers, and random string sorting. If your work involves encryption, FP math, or general-purpose multithreaded tasks, the data favors Intel.

The overall balance of wins (12 for Intel, 5 for AMD) suggests the Core Ultra 9 is more consistently strong across a broader range of tests. But the magnitude of AMD's wins in specific areas — particularly the 175.2% single-core margin — means the EPYC 4484PX is not a niche product; it is a specialist that excels where it matters most.

Specification Differences

The two CPUs differ in nearly every core specification. The AMD EPYC 4484PX has 12 cores and 24 threads, while the Intel Core Ultra 9 275HX has 24 cores and 24 threads. AMD's base clock is 4.40 GHz versus Intel's 2.70 GHz; boost clocks are closer, at 5.60 GHz and 5.40 GHz respectively. TDP is a major split: the EPYC is rated at 120 W, while the Core Ultra 9 is rated at 55 W.

The socket is another fundamental difference. AMD uses AMD Socket AM5, while Intel uses Intel BGA 2114. The AMD chip has a 5 nm process node and a die size of 2x 71 mm², with 17,840 million transistors. Intel uses a 3 nm node with a die size of 243 mm² and 17,800 million transistors. Cache configurations are entirely different: AMD has 64 KB L1 per core, 1 MB L2 per core, and 128 MB shared L3 plus a 1x 64MB 3D V-Cache slice. Intel has 192 KB L1 per core, 3 MB L2 per core, and 36 MB shared L3.

Memory bandwidth favors Intel at 102.4 GB/s versus 83.2 GB/s for AMD, both using dual-channel DDR5. PCIe lanes differ: AMD offers 28 Gen 5 lanes (CPU only), while Intel offers 20 Gen 5 lanes. The AMD chip has Radeon Graphics integrated, while Intel has Arc Xe-LPG Graphics 64EU. The EPYC 4484PX supports ECC memory; the Core Ultra 9 does not. The AMD chip is locked (multiplier not unlocked), while Intel's is unlocked. Market segments differ: AMD targets Server/Workstation, Intel targets Mobile.

Architecture Differences

The AMD EPYC 4484PX is built on Zen 4 architecture with the codename Raphael, part of the EPYC 4004 series. It uses a 5 nm process from TSMC. The Intel Core Ultra 9 275HX uses Arrow Lake architecture with the codename Arrow Lake-HX, part of the Core Ultra Series 2, on a 3 nm TSMC process.

The transistor counts are nearly identical (17,840 million for AMD, 17,800 million for Intel), but the die layout is very different. AMD uses two 71 mm² dies totaling 142 mm², while Intel uses a single 243 mm² die. The cache structures reflect different design philosophies: AMD's 128 MB shared L3 plus 64 MB of 3D V-Cache creates a massive aggregate cache, while Intel's 36 MB shared L3 is much smaller. The EPYC also has per-core L1 of 64 KB and L2 of 1 MB, whereas Intel has 192 KB L1 and 3 MB L2 per core.

The generation labels differ: AMD is listed as "EPYC (Zen 4 (Raphael))" while Intel is "Ultra 9 (Arrow Lake-HX)". The Intel part has a production status of Active and a release date of 2025-01-12, while the AMD chip was released 2024-05-20. Intel's part number is SRVFK; AMD's is 100-000001482. Intel's multiplier is unlocked, allowing overclocking, while AMD's is locked.

The Verdict

The data points to a clear use-case division. The AMD EPYC 4484PX is the processor for single-thread-critical server and workstation tasks. The 175.2% lead in Cinebench R23 single-core and the 47.9% lead in physics simulation are not marginal advantages; they are decisive. The 128 MB L3 cache plus 64 MB 3D V-Cache and ECC memory support align with server expectations. The launch MSRP is $599. This is a chip for workloads where one thread's performance and cache capacity dominate.

The Intel Core Ultra 9 275HX is the generalist. It wins 12 of 17 benchmarks, including the most important aggregate metrics: PassMark multithread (55759 vs 50547), floating-point math (191186 vs 96446), and data encryption (47112 vs 36499). Its 55 W TDP is less than half of AMD's 120 W, making it the more power-efficient choice for mobile platforms. The unlocked multiplier and 24 cores appeal to enthusiasts who want headroom.

If you are building a server or workstation where single-thread performance and ECC memory are non-negotiable, the EPYC 4484PX is the data-backed choice. If you need a mobile chip that handles a broad mix of compute — especially FP-heavy or encryption-heavy tasks — the Core Ultra 9 275HX is the winner. The average scores are nearly tied (67822 vs 67469, a 0.5% gap), so the decision comes down to which specific tests match your workload. Pick AMD for single-thread dominance and server features; pick Intel for overall versatility and power efficiency.