AMD Ryzen 9 9900X3D vs Intel Xeon Phi 7290 Comparison

The AMD Ryzen 9 9900X3D is the decisive winner in every single benchmark comparison against the Intel Xeon Phi 7290, sweeping all 17 head-to-head tests. The data shows that the Ryzen 9 9900X3D is not just faster but fundamentally superior in per-thread performance, while the Xeon Phi 7290's massive 72-core/288-thread configuration fails to overcome the architectural and frequency advantages of its rival in any measured workload.

Where Each One Wins

The benchmark results are unambiguous: the AMD Ryzen 9 9900X3D wins every workload category, leaving the Intel Xeon Phi 7290 with zero victories. The Ryzen 9 9900X3D's dominance spans single-threaded, multi-threaded, and specialized instruction tests, making it the superior choice for essentially any compute task in the dataset.

Looking at single-thread performance, the Ryzen 9 9900X3D achieves a PassMark single-thread score of 4646 against the Xeon Phi 7290's 485, a difference of 857.9 percent. This gap is even more pronounced in Cinebench R15 single-core, where the AMD part scores 679 versus 215. The Xeon Phi 7290 was designed for massively parallel throughput, but its low 1.50 GHz base clock and 1.70 GHz boost clock severely handicap it in latency-sensitive workloads.

In multi-threaded tests, the Ryzen 9 9900X3D continues its sweep. The Cinebench R23 multi-core score of 47737 for AMD dwarfs the Xeon Phi 7290's 15163, a 214.8 percent advantage. Even in the PassMark multi-thread test, which should theoretically favor the 288-thread Xeon Phi, the AMD part scores 56154 versus 17839. The Xeon Phi's 72 cores cannot compensate for the Ryzen's superior architecture and higher clock speeds.

The only close contest is PassMark random string sorting, where the Ryzen 9 9900X3D leads by a modest 4.8 percent (71864 vs 68593). This suggests the Xeon Phi 7290 has some competence in memory-intensive sorting operations, but it still loses. Every other test shows at least a 21.4 percent gap, with the AMD part winning by over 100 percent in nine of the seventeen comparisons.

Architecture Differences

The architectural divide between these two processors is stark. The AMD Ryzen 9 9900X3D uses the Zen 5 architecture on the Granite Ridge codename, built on a 4 nm process at TSMC. It packs 12 cores and 24 threads with a base clock of 4.40 GHz and a boost clock of 5.50 GHz. The Intel Xeon Phi 7290, by contrast, uses the Knights Landing architecture, built on Intel's 14 nm process with 72 cores and 288 threads, but clocks are dramatically lower at 1.50 GHz base and 1.70 GHz boost.

Cache configurations highlight the strategic differences. The Ryzen 9 9900X3D features 80 KB of L1 cache per core, 1 MB of L2 per core, and a massive 128 MB of L3 cache. The Xeon Phi 7290 has only 32 KB of L1 per core and 512 KB of L2 per core, with no L3 cache listed at all. This lack of a shared L3 cache is a critical disadvantage for the Xeon Phi, as it relies on high-bandwidth memory and many threads rather than large caches to feed its cores.

The transistor counts reflect the process node differences: the AMD part has 16,630 million transistors across a 2x 70.6 mm² die, while the Xeon Phi 7290 has 8,000 million transistors. Despite having fewer cores, the AMD processor packs more than twice the transistors, enabling more complex out-of-order execution and larger caches.

Memory support also differs fundamentally. The Ryzen 9 9900X3D uses DDR5 with dual-channel memory and 89.6 GB/s bandwidth, while the Xeon Phi 7290 uses DDR4 with no listed bandwidth figure. Both support ECC memory, which is notable for a desktop part like the Ryzen. The AMD processor also includes integrated Radeon Graphics, while the Xeon Phi has no integrated graphics at all.

Head-to-Head Benchmarks

The single-thread results are the most lopsided. The PassMark single-thread test shows the Ryzen 9 9900X3D scoring 4646 versus 485 for the Xeon Phi 7290, a 857.9 percent advantage. This is the largest gap in the entire dataset and highlights the fundamental per-core performance difference. Cinebench R15 single-core shows a similar pattern: 679 for AMD versus 215 for Intel, a 215.8 percent lead.

Multi-threaded Cinebench results are consistently around 215 percent in AMD's favor. The R15 multi-core score is 4811 vs 1528, R20 is 20049 vs 6368, and R23 is 47737 vs 15163. These are nearly identical percentage gaps, suggesting that the Ryzen 9 9900X3D's 12 cores are delivering roughly three times the per-thread performance of the Xeon Phi's 72 cores.

The PassMark suite reveals more varied gaps. Data compression shows a 21.4 percent lead for AMD (685074 vs 564535), which is relatively close. Extended instructions show a 33.5 percent gap (55426 vs 41517). Integer math is 41.6 percent in AMD's favor (179727 vs 126922). But floating point math swings to 152.3 percent (119622 vs 47417), and the gap expands to 377.2 percent in find prime numbers (544 vs 114).

Data encryption is another major win for the Ryzen 9 9900X3D, scoring 33282 versus 12505, a 166.1 percent advantage. Physics tests show a 136.6 percent lead (5340 vs 2257). The consistent pattern is that the Xeon Phi 7290 cannot leverage its core count to close the gap, because each individual core is so much slower than the Ryzen's Zen 5 cores.

FAQ

Q: Why does the AMD Ryzen 9 9900X3D win every benchmark despite having far fewer cores?

A: The Ryzen 9 9900X3D has 12 cores versus 72 for the Xeon Phi 7290, but its base clock of 4.40 GHz and boost of 5.50 GHz are dramatically higher than the Xeon Phi's 1.50 GHz and 1.70 GHz. Combined with a 128 MB L3 cache versus no L3 cache for the Xeon Phi, the AMD part delivers vastly superior per-thread performance that outweighs the core count disadvantage.

Q: Is the Intel Xeon Phi 7290 competitive in any workload?

A: The closest result is PassMark random string sorting, where the Ryzen 9 9900X3D leads by only 4.8 percent (71864 vs 68593). Data compression is also relatively competitive at 21.4 percent behind. However, the Xeon Phi 7290 does not win a single test in the dataset.

Q: How does the single-thread performance gap compare between the two processors?

A: The difference is extreme. In PassMark single-thread, the Ryzen 9 9900X3D scores 4646 versus 485 for the Xeon Phi 7290, a 857.9 percent advantage. Cinebench R15 single-core shows a 215.8 percent lead for AMD (679 vs 215).

Q: What are the power and platform differences?

A: The Ryzen 9 9900X3D has a 120W TDP and uses AMD Socket AM5, while the Xeon Phi 7290 has a 245W TDP and uses Intel Socket 3647. The AMD part supports DDR5 memory with dual-channel and 89.6 GB/s bandwidth, while the Xeon Phi supports DDR4. The AMD processor is also a desktop part, whereas the Xeon Phi is a server/workstation processor.

Q: Does the Xeon Phi's 288 threads provide any benefit in multi-threaded tests?

A: No. In Cinebench R23 multi-core, the Ryzen 9 9900X3D scores 47737 versus 15163 for the Xeon Phi, a 214.8 percent advantage. The Xeon Phi's 288 threads are each too slow to compete with the Ryzen's 24 threads, and the lack of L3 cache further hampers its performance.

Q: What is the release timeline for these processors?

A: The AMD Ryzen 9 9900X3D was released on 2025-01-05 and is currently active in production. The Intel Xeon Phi 7290 was released on 2016-06-19, making it nearly nine years older. The Xeon Phi 7290's production status is not listed as active.

Specification Differences

The two processors differ in nearly every major specification category. The AMD Ryzen 9 9900X3D has 12 cores and 24 threads, while the Intel Xeon Phi 7290 has 72 cores and 288 threads. Clock speeds are vastly different: the AMD part runs at 4.40 GHz base and 5.50 GHz boost, while the Intel part runs at 1.50 GHz base and 1.70 GHz boost.

The manufacturing process separates them by two generations: 4 nm for AMD at TSMC versus 14 nm for Intel. Transistor counts are 16,630 million for AMD versus 8,000 million for Intel. The L1 cache is 80 KB per core for AMD versus 32 KB per core for Intel. L2 cache is 1 MB per core for AMD versus 512 KB per core for Intel. The AMD part has 128 MB of L3 cache, while the Intel part has none.

Memory support differs: the Ryzen 9 9900X3D uses DDR5 with dual-channel and 89.6 GB/s bandwidth, while the Xeon Phi 7290 uses DDR4. The AMD processor includes integrated Radeon Graphics, while the Intel part has none. The Ryzen 9 9900X3D has PCIe Gen 5 with 24 lanes, while the Xeon Phi has no PCIe specification listed. The AMD part has an unlocked multiplier, while the Xeon Phi is locked. The TDP is 120W for AMD versus 245W for Intel.

The Verdict

The data is unequivocal: the AMD Ryzen 9 9900X3D is the superior processor in every measurable way. With 17 wins and 0 losses in head-to-head benchmarks, it outperforms the Intel Xeon Phi 7290 across single-threaded, multi-threaded, and specialized workloads. The Ryzen 9 9900X3D's 4 nm Zen 5 architecture, 5.50 GHz boost clock, and 128 MB L3 cache provide a level of per-core performance that the 14 nm Knights Landing architecture cannot match, despite the Xeon Phi's 6x core count and 12x thread count.

Users should select the AMD Ryzen 9 9900X3D for virtually any application. Its 91st percentile ranking among all CPUs, combined with its active production status and modern platform features like DDR5 and PCIe Gen 5, make it a current and relevant choice. The Xeon Phi 7290, while also ranking in the 91st percentile, achieves this through brute-force parallelism that fails to materialize into benchmark wins against the AMD part.

The Xeon Phi 7290's only potential niche would be workloads that heavily favor massive thread counts and specific instruction patterns, but the data shows it loses even in multi-threaded tests by over 200 percent. The AMD Ryzen 9 9900X3D is the clear recommendation based on benchmark performance, architectural modernity, and platform support. The Xeon Phi 7290's 2016 release date and lack of L3 cache make it a legacy product that cannot compete with current-generation desktop processors.