AMD Ryzen 9 9900X3D vs Intel Core Ultra 5 245KF Comparison

The Intel Core Ultra 5 245KF and AMD Ryzen 9 9900X3D are both high-end desktop processors, but the data shows they serve very different masters. The 245KF is a 14-core, 14-thread Arrow Lake part built on a 3 nm TSMC process, while the 9900X3D is a 12-core, 24-thread Zen 5 Granite Ridge chip on a 4 nm node. The benchmark results are decisive: AMD wins 13 of the 17 head-to-head tests, often by massive margins, while Intel secures only four wins, mostly by slim single-digit percentages. The 9900X3D is the clear performance leader for multi-threaded and compute-heavy workloads, while the 245KF holds a narrow edge in single-threaded PassMark tests and one floating-point math workload. The choice between them is not about raw capability—it is about matching the right tool to the specific task.

The Verdict

The AMD Ryzen 9 9900X3D is the processor to pick if your work or play scales with thread count and cache. Its average benchmark score of 54681 sits just below the Intel’s 55421, but that aggregate figure masks the real story: the 9900X3D wins the Cinebench suite outright, scoring 47737 in R23 multi-core versus Intel’s 36908, a 22.7% advantage. For rendering, video encoding, or any heavily parallel task, the AMD chip is the superior choice. The data also shows a huge win in PassMark integer math, 179727 versus 98936, a 45% gap that points to strong general-purpose compute performance.

The Intel Core Ultra 5 245KF, on the other hand, is not without merit. It wins PassMark single-thread by a hair, 4717 versus 4646, a 1.5% margin, and it takes floating-point math by 10.4%, scoring 132037 against AMD’s 119622. It also edges out the 9900X3D in data encryption, 33641 versus 33282, a 1.1% lead. If your primary use case is lightly threaded software or specific math workloads, the 245KF is a viable pick. However, its 4 wins versus AMD’s 13 wins make the overall verdict clear: the 9900X3D is the stronger all-around performer, especially for anyone who can utilize its 24 threads.

Architecture Differences

The two chips are built on fundamentally different designs. The Intel Core Ultra 5 245KF uses the Arrow Lake architecture on a 3 nm process from TSMC, featuring 14 cores and 14 threads—no hyperthreading. It has 192 KB of L1 cache per core, 3 MB of L2 per core, and 24 MB of shared L3 cache. The AMD Ryzen 9 9900X3D uses Zen 5 on a 4 nm process, with 12 cores and 24 threads via SMT. Its cache layout is vastly different: 80 KB L1 per core, 1 MB L2 per core, and a massive 128 MB of shared L3 cache, which is the key differentiator for cache-sensitive workloads.

Transistor counts are similar—17,800 million for Intel versus 16,630 million for AMD—but the die sizes diverge sharply. Intel’s die is 243 mm², while AMD uses a dual-die design with two 70.6 mm² chiplets, totaling 141.2 mm². This smaller aggregate die area partially explains the AMD’s lower TDP of 120 watts versus Intel’s 125 watts. Both support DDR5 memory in dual-channel mode, but Intel has a higher theoretical memory bandwidth at 102.4 GB/s versus AMD’s 89.6 GB/s. AMD also includes integrated Radeon Graphics, while the Intel part has none, and AMD supports ECC memory, which Intel does not. The AMD chip also offers more PCIe lanes, 24 Gen 5 lanes versus Intel’s 20.

Head-to-Head Benchmarks

The Cinebench results are uniform and brutal for Intel. Across R15, R20, and R23, both single-core and multi-core, the 9900X3D wins every test by exactly 22.7%. For instance, in Cinebench R23 multi-core, AMD scores 47737 against Intel’s 36908; in single-core, AMD scores 6739 against Intel’s 5210. This consistent margin indicates a fundamental performance advantage in CPU-bound rendering tasks, not a workload-specific quirk.

PassMark results are more varied. The 9900X3D dominates data compression, scoring 685074 versus Intel’s 463378, a 32.4% lead. Extended instructions also favor AMD heavily, 55426 versus 38020, a 31.4% gap. The biggest single win for AMD is in integer math, where it scores 179727 against Intel’s 98936, a 45% difference. Physics tests favor AMD too, with 5340 versus 3105, a 41.9% margin, and multithread scores show AMD ahead at 56154 versus 43422, a 22.7% gap.

Intel’s wins are narrower but real. In floating-point math, the 245KF scores 132037 against AMD’s 119622, a 10.4% advantage. PassMark single-thread (and the duplicate singlethread test) shows Intel at 4717 versus AMD’s 4646, a 1.5% lead. Data encryption is a near-tie, with Intel at 33641 versus AMD’s 33282, a 1.1% win. Notably, the 9900X3D also has additional benchmarks not run on the Intel chip, including Geekbench multi-core (20572) and single-core (3336), and 3DMark tests across thread counts ranging from 12490 with 16 threads to 1269 with a single thread; these results are not directly comparable to the Intel data but indicate strong scaling.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core Ultra 5 245KF has 14 cores and 14 threads, while the AMD Ryzen 9 9900X3D has 12 cores and 24 threads. AMD’s use of simultaneous multithreading gives it more threads despite fewer physical cores.

Q: How much L3 cache does each CPU have?

A: The Intel chip has 24 MB of shared L3 cache, whereas the AMD chip has 128 MB of shared L3 cache. That 104 MB difference is the defining architectural gap between the two.

Q: Which CPU wins in Cinebench R23 multi-core?

A: The AMD Ryzen 9 9900X3D wins decisively, scoring 47737 versus the Intel’s 36908, a 22.7% advantage in the benchmark results.

Q: Is the Intel chip better at any single-threaded task?

A: Yes, in PassMark single-thread testing, the Intel Core Ultra 5 245KF scores 4717 versus AMD’s 4646, a 1.5% lead. The AMD chip, however, wins Cinebench R23 single-core by a much larger margin, 6739 versus 5210.

Q: What are the TDP ratings for these processors?

A: The Intel Core Ultra 5 245KF has a TDP of 125 watts, while the AMD Ryzen 9 9900X3D has a TDP of 120 watts. Despite the AMD chip having a smaller aggregate die size, the power draw is nearly identical.

Q: Do both CPUs support DDR5 memory?

A: Yes, both support DDR5 in dual-channel mode. Intel lists a memory bandwidth of 102.4 GB/s, while AMD lists 89.6 GB/s.

Where Each One Wins

The AMD Ryzen 9 9900X3D is the winner for any workload that benefits from high thread counts and a large cache. Its 22.7% lead across the entire Cinebench suite makes it the obvious choice for 3D rendering, video encoding, and heavy multitasking. The 45% lead in integer math and 41.9% lead in physics suggest strong performance in scientific computing, financial modeling, and simulation tasks. The 32.4% advantage in data compression also makes it ideal for file archiving, database operations, or any storage-heavy workflow. The 128 MB L3 cache is a clear asset for workloads that repeatedly access large datasets, and the 24 threads provide substantial parallel throughput.

The Intel Core Ultra 5 245KF wins in a narrower set of scenarios. Its 10.4% advantage in floating-point math makes it a pick for certain scientific and engineering applications that rely heavily on FPU operations. The 1.5% single-thread PassMark lead, while small, indicates it is slightly better for older or poorly threaded applications that depend on raw clock speed—the Intel boosts to 5.20 GHz versus AMD’s 5.50 GHz, but the architecture still edges ahead in this specific test. The 1.1% win in data encryption is negligible but shows Intel’s design handles cryptographic tasks competitively. If your primary software is single-threaded and not cache-hungry, the 245KF is the safer bet; if you can leverage multiple cores, the 9900X3D is unequivocally stronger.

Specification Differences

The two CPUs differ on nearly every core specification. The Intel Core Ultra 5 245KF uses 14 cores and 14 threads, while the AMD Ryzen 9 9900X3D uses 12 cores and 24 threads. Base clocks are 4.20 GHz for Intel and 4.40 GHz for AMD, with boost clocks of 5.20 GHz and 5.50 GHz respectively. TDP is 125 watts for Intel versus 120 watts for AMD. The socket differs entirely: Intel Socket 1851 for the 245KF versus AMD Socket AM5 for the 9900X3D. Process nodes are 3 nm (Intel) and 4 nm (AMD), both from TSMC. Transistor counts are 17,800 million for Intel and 16,630 million for AMD, with die sizes of 243 mm² and 2x 70.6 mm² respectively. Cache configurations are fundamentally different: Intel has 192 KB L1 per core, 3 MB L2 per core, and 24 MB shared L3; AMD has 80 KB L1 per core, 1 MB L2 per core, and 128 MB shared L3. Memory bandwidth is 102.4 GB/s for Intel versus 89.6 GB/s for AMD, and ECC support is absent on Intel but present on AMD. PCIe lane counts are 20 Gen 5 lanes for Intel and 24 Gen 5 lanes for AMD. The Intel chip has no integrated graphics, while the AMD chip includes Radeon Graphics. Release dates are October 2024 for Intel and January 2025 for AMD. Launch MSRP is $294 for the Intel and $599 for the AMD.