AMD EPYC 7443P vs Intel Core Ultra 9 285K Comparison

The Intel Core Ultra 9 285K and AMD EPYC 7443P are both 24-core processors, but they target entirely different worlds: one is a desktop flagship, the other a server workhorse. The benchmark data shows a clear split, with the Intel chip dominating in many threaded and single-core tests, while the AMD EPYC counters in specific server-oriented workloads. This analysis breaks down the raw numbers to show where each processor excels and where it falls short, based solely on the provided data.

FAQ

Q: Which processor has more threads?

A: The AMD EPYC 7443P has 48 threads thanks to simultaneous multithreading, while the Intel Core Ultra 9 285K has 24 threads, matching its core count.

Q: How do their average benchmark scores compare?

A: The Intel Core Ultra 9 285K has an average benchmark score of 83807, while the AMD EPYC 7443P has an average of 81661. Both sit at the 96th percentile when compared to all CPUs.

Q: Which chip is newer?

A: The Intel Core Ultra 9 285K was released on 2024-10-23, while the AMD EPYC 7443P was released earlier, on 2021-03-14.

Q: Do they use the same memory type?

A: No. The Intel chip supports DDR5 memory with a dual-channel bus, while the AMD EPYC supports DDR4 with an eight-channel bus.

Q: Which processor has a larger L3 cache?

A: The AMD EPYC 7443P has a significantly larger L3 cache at 128 MB shared, compared to the Intel Core Ultra 9 285K’s 36 MB shared.

Q: Is the Intel processor's integrated graphics present on the AMD chip?

A: No. The Intel Core Ultra 9 285K includes Arc Xe-LPG Graphics with 64 execution units, while the AMD EPYC 7443P has no integrated graphics.

Architecture Differences

The two chips are built on fundamentally different architectures. The Intel Core Ultra 9 285K uses the Arrow Lake-S design, fabricated on a 3 nm process by TSMC, and belongs to the Core Ultra Series 2. The AMD EPYC 7443P is based on the Zen 3 architecture, codenamed Milan, and uses a larger 7 nm process node. The Intel die is a single 243 mm² piece with 17,800 million transistors, while the AMD chip is composed of four dies, each measuring 81 mm², containing a combined 16,600 million transistors.

Cache hierarchies differ substantially. The Intel chip allocates 192 KB of L1 and 3 MB of L2 per core, with a 36 MB shared L3. The AMD EPYC provides 64 KB of L1 and 512 KB of L2 per core, but its shared L3 is a massive 128 MB. Memory support is another stark contrast: the Intel chip uses dual-channel DDR5 with 102.4 GB/s of bandwidth, whereas the AMD EPYC uses eight-channel DDR4 with 204.8 GB/s. Both support ECC memory. The Intel processor is unlocked for overclocking, while the AMD EPYC is not.

PCIe connectivity is also a major divider. The Intel Core Ultra 9 285K provides Gen 5 with 20 lanes, while the AMD EPYC 7443P offers Gen 4 with a much larger 128 lanes. The Intel chip also integrates Arc Xe-LPG Graphics with 64 execution units, a feature entirely absent on the AMD server part. The TDP reflects their intended environments: 125 W for the desktop Intel chip versus 200 W for the server AMD chip.

Head-to-Head Benchmarks

The Intel Core Ultra 9 285K wins 12 of the 19 head-to-head comparisons, often by large margins. Its most dominant victory is in Geekbench multicore, where it scores 26702 against the EPYC's 13400, a 99.3% advantage. It also excels in floating-point math, scoring 224324 versus 129932, a 72.6% lead. Single-threaded performance is a clear Intel strength: it leads by 75% in Passmark single-thread (5087 vs 2907) and by 71.7% in Geekbench single-core (2870 vs 1672).

In Cinebench, the results are mixed. The Intel chip wins Cinebench R15 multicore with 6494 versus 4881, a 33% lead, and Cinebench R20 multicore with 24003 versus 20341, an 18% lead. It also wins Cinebench R20 single-core by 18% (3388 vs 2871). However, the AMD EPYC strikes back in Cinebench R23, winning multicore with 48433 versus 42522, a 12.2% advantage, and dominating single-core in that test with 6837 versus 2377, a 65.2% lead.

The AMD EPYC 7443P wins 7 tests, focusing on integer-heavy and server-style workloads. Its largest win is in Passmark integer math, scoring 232632 against Intel's 172379, a 25.9% lead. It also wins Passmark physics (4748 vs 3938, a 17.1% lead), data compression (820859 vs 790052, an 3.8% lead), and random string sorting (95581 vs 94927, a 0.7% lead). Interestingly, the EPYC wins Cinebench R15 single-core with 689 versus 359, a 47.9% lead, and Cinebench R23 single-core by a huge margin.

Specification Differences

The core count is identical at 24, but the thread count differs: the Intel Core Ultra 9 285K has 24 threads, while the AMD EPYC 7443P has 48. The base clock is higher on the Intel chip at 3.70 GHz versus 2.85 GHz, and the boost clock is also higher at 5.70 GHz versus 4.00 GHz. The Intel chip has a lower TDP of 125 W compared to the AMD's 200 W.

The process node is a key difference, with Intel using a 3 nm process and AMD using a 7 nm process. The transistor count is slightly higher on the Intel chip at 17,800 million versus 16,600 million. The die size is larger on the Intel chip (243 mm²) compared to the AMD's multi-die design (4x 81 mm²). Cache sizes show a significant difference in L3, with Intel at 36 MB and AMD at 128 MB, while L1 and L2 per-core allocations also differ (192 KB / 3 MB for Intel versus 64 KB / 512 KB for AMD).

Memory support is a major divergence: the Intel chip uses DDR5 with a dual-channel bus and 102.4 GB/s bandwidth, while the AMD EPYC uses DDR4 with an eight-channel bus and 204.8 GB/s bandwidth. PCIe lanes are vastly different, with Intel offering Gen 5 20 lanes and AMD offering Gen 4 128 lanes. The Intel chip has integrated graphics, while the AMD chip has none. The Intel chip has an unlocked multiplier, while the AMD EPYC does not. Their sockets are also incompatible: Intel Socket 1851 for the Intel chip and AMD Socket SP3 for the EPYC.

Where Each One Wins

The Intel Core Ultra 9 285K is the clear winner for tasks that rely on high single-thread performance and broad multi-threaded throughput. It dominates in Geekbench multicore and single-core, Passmark single-thread, floating-point math, and extended instructions. This makes it a strong choice for general desktop computing, content creation, and applications that favor responsive single-core speed, as evidenced by its wins in Cinebench R15 and R20. Its 33% lead in Cinebench R15 multicore and 18% lead in Cinebench R20 multicore show it handles shorter, bursty multi-threaded loads well.

The AMD EPYC 7443P wins in specific server-centric workloads. Its 25.9% lead in integer math and its wins in data compression and random string sorting point to strengths in database, financial, and data-processing tasks. The 12.2% lead in Cinebench R23 multicore suggests it may sustain heavy multi-threaded loads better, possibly due to its larger 128 MB L3 cache and 48 threads. Its massive Cinebench R23 single-core win is an outlier in the data, but the Passmark physics win indicates a different performance profile. The EPYC's eight-channel memory and 128 PCIe Gen 4 lanes make it the obvious choice for server platforms requiring massive memory bandwidth and expandability.

The Verdict

The data presents a clear picture: pick the Intel Core Ultra 9 285K for desktop and workstation tasks where single-thread speed and balanced multi-threading are paramount. It wins the majority of benchmarks, including the critical Geekbench and Passmark single-thread tests, and offers integrated graphics and a lower TDP of 125 W. Its 99.3% lead in Geekbench multicore and 72.6% lead in floating-point math make it the better all-round performer in this comparison.

The AMD EPYC 7443P is the choice for server workloads that specifically benefit from its 48 threads, large 128 MB L3 cache, and high memory bandwidth. Its wins in integer math, data compression, and physics indicate it is tuned for specific enterprise applications. The 128 PCIe Gen 4 lanes and eight-channel DDR4 support are not present on the Intel chip. If the workload involves heavy integer processing or requires vast amounts of memory bandwidth and I/O, the EPYC is the data-backed winner, despite losing the overall benchmark count.