AMD Ryzen 9 7950X3D vs Intel Core i9-13900KS Comparison

The AMD Ryzen 9 7950X3D and Intel Core i9-13900KS are two of the most capable desktop processors in the database, both holding a 93rd percentile ranking against all CPUs. The recorded benchmarks show a clear split: Intel wins 15 of the 23 head-to-head tests, while AMD wins 8. However, the nature of those wins matters more than the raw count. The Ryzen 9 7950X3D excels in specific computational workloads, while the Core i9-13900KS dominates in short-burst, single-thread, and lightly threaded tasks. This comparison breaks down where each processor stands, what separates them architecturally, and which workloads favor which design.

Where Each One Wins

The Intel Core i9-13900KS is the clear leader in any benchmark that stresses one or two threads. In 3DMark single-thread, it scores 1226 against AMD's 1062, a 13.4% advantage. The gap widens dramatically in Cinebench R23 single-core, where Intel posts 7252 versus AMD's 2053, a 71.7% lead. The same pattern appears in Cinebench R15 single-core, with Intel at 730 and AMD at 326, a 55.3% difference. This is not marginal; it is a dominant sweep of every single-thread test in the database. The Intel part also wins all 3DMark multi-threaded variants, from 2-thread (2412 vs 2102, 12.9% ahead) to max-thread (16243 vs 14252, 12.3% ahead). For gaming, simulation, or any application that relies on a few fast cores, the data points squarely at Intel.

The AMD Ryzen 9 7950X3D, by contrast, wins in workloads that reward large caches and sustained multi-thread throughput. The most striking example is PassMark find prime numbers, where AMD scores 495 versus Intel's 257, a 92.6% advantage. This is an algorithmic test that heavily benefits from the 128 MB of L3 cache. AMD also wins PassMark extended instructions (58515 vs 48217, 21.4% ahead) and PassMark physics (5053 vs 3441, 46.8% ahead). In Cinebench R15 multicore, AMD takes 5974 against Intel's 5177, a 15.4% margin. The Ryzen also edges ahead in PassMark multithread (62383 vs 60644, 2.9%), integer math (214089 vs 211027, 1.5%), and random string sorting (92784 vs 90257, 2.8%). These are narrower wins, but they show a consistent pattern: AMD's cache-heavy design pulls ahead in integer-heavy, cache-sensitive, and physics-based calculations.

The overall average benchmark scores reflect this split. AMD's average benchmark score is 65914, while Intel's is 64051. AMD sits 0.3% below the Intel Core 9 273PQE (66099) and 0.4% below the Intel Core Ultra 5 250KF Plus (66159), but 1.2% above the AMD EPYC 9124 (65104). Intel's average score is 0.2% below the AMD EPYC 7343 (64202) and 0.4% above the AMD Ryzen AI Max PRO 390 (63765), putting it 0.6% ahead of the Intel Core Ultra 7 265F (64438). Neither chip is far from its nearest rivals in aggregate, but the per-test deltas show completely different strengths.

Architecture Differences

The two processors are built on fundamentally different designs. The AMD Ryzen 9 7950X3D uses Zen 4 architecture, codenamed Raphael, fabricated on a 5 nm process at TSMC. The chip has 16 cores and 32 threads, with a base clock of 4.20 GHz and a boost clock of 5.70 GHz. It is built from two dies, each measuring 71 mm², totaling 17,840 million transistors. The cache hierarchy is the defining feature: 64 KB of L1 per core, 1 MB of L2 per core, and a massive 128 MB of shared L3 cache, which includes a 1x 64 MB 3D V-Cache slice. This 3D-stacked cache is what drives the exceptional results in cache-sensitive workloads. The CPU supports DDR5 memory on a dual-channel bus with a bandwidth of 83.2 GB/s, and it supports ECC memory. It uses AMD Socket AM5 with PCIe Gen 5 (24 lanes from the CPU) and includes Radeon Graphics as integrated graphics.

The Intel Core i9-13900KS uses Raptor Lake architecture, codenamed Raptor Lake-S, fabricated on Intel's 10 nm process. It offers 24 cores and 32 threads, with a base clock of 3.20 GHz and a boost clock of 6.00 GHz. The die size is 257 mm². Its cache is smaller per the database: 80 KB of L1 per core, 2 MB of L2 per core, and 36 MB of shared L3. There is no 3D V-Cache equivalent. The memory support is broader: it supports both DDR4 and DDR5 on a dual-channel bus, with a higher memory bandwidth of 89.6 GB/s. It also supports ECC memory. It uses Intel Socket 1700, offers PCIe Gen 5 with 20 lanes from the CPU, and pairs with UHD Graphics 770 for integrated graphics. Both CPUs have an unlocked multiplier and were released in January 2023, with the AMD launching on January 3 and the Intel on January 11.

The transistor count is only listed for AMD, which is worth noting. The Intel part's transistor count is not recorded in the database, so no direct comparison can be made there. The process node difference (5 nm vs 10 nm) gives AMD a manufacturing advantage in density, but Intel compensates with more cores and a higher boost clock.

FAQ

Q: Which CPU has more cores and threads?

A: The Intel Core i9-13900KS has 24 cores and 32 threads, while the AMD Ryzen 9 7950X3D has 16 cores and 32 threads. Both have the same thread count, but Intel has 8 more physical cores.

Q: Does the AMD Ryzen 9 7950X3D have more cache?

A: Yes. The AMD part has 128 MB of shared L3 cache, which includes a 1x 64 MB 3D V-Cache slice. The Intel Core i9-13900KS has 36 MB of shared L3 cache. AMD also has 1 MB of L2 per core versus Intel's 2 MB per core, but Intel has 80 KB of L1 per core versus AMD's 64 KB.

Q: What is the boost clock difference?

A: The Intel Core i9-13900KS boosts to 6.00 GHz, which is higher than the AMD Ryzen 9 7950X3D's 5.70 GHz. The base clocks are 3.20 GHz for Intel and 4.20 GHz for AMD.

Q: Which CPU supports both DDR4 and DDR5 memory?

A: The Intel Core i9-13900KS supports both DDR4 and DDR5. The AMD Ryzen 9 7950X3D supports only DDR5. Both use a dual-channel memory bus, but Intel has a higher memory bandwidth at 89.6 GB/s versus AMD's 83.2 GB/s.

Q: Which CPU has a higher single-thread score in Cinebench R23?

A: The Intel Core i9-13900KS scores 7252 in Cinebench R23 single-core, which is 71.7% higher than the AMD Ryzen 9 7950X3D's 2053.

Q: Which CPU wins in PassMark find prime numbers?

A: The AMD Ryzen 9 7950X3D wins by a large margin, scoring 495 against Intel's 257, a 92.6% difference. This is the largest single-test win in the head-to-head data.

Specification Differences

The two chips differ across nearly every major specification category. The AMD Ryzen 9 7950X3D uses a 5 nm process at TSMC, while the Intel Core i9-13900KS uses a 10 nm process at Intel. AMD has 16 cores and 32 threads; Intel has 24 cores and 32 threads. AMD's base clock is 4.20 GHz and boost is 5.70 GHz; Intel's base is 3.20 GHz and boost is 6.00 GHz. The power envelope also differs: AMD has a TDP of 120, while Intel has a TDP of 150. AMD uses AMD Socket AM5, Intel uses Intel Socket 1700. The cache layouts are very different: AMD has 64 KB L1 per core, 1 MB L2 per core, and 128 MB L3 shared; Intel has 80 KB L1 per core, 2 MB L2 per core, and 36 MB L3 shared. AMD's die size is 2x 71 mm², Intel's is 257 mm². AMD lists 17,840 million transistors, while Intel's transistor count is not recorded. Memory support differs: AMD supports only DDR5, Intel supports both DDR4 and DDR5. Memory bandwidth favors Intel at 89.6 GB/s versus AMD's 83.2 GB/s. Both support ECC memory. PCIe lanes differ: AMD provides Gen 5 with 24 lanes, Intel provides Gen 5 with 20 lanes. Integrated graphics are Radeon Graphics on AMD and UHD Graphics 770 on Intel. Both have unlocked multipliers. The release dates are close, January 3 for AMD and January 11 for Intel, both in 2023. The launch MSRP for both is $699.

Head-to-Head Benchmarks

The largest win for the AMD Ryzen 9 7950X3D is in PassMark find prime numbers, where it scores 495 against Intel's 257, a 92.6% advantage. This is a cache-bound test, and the 128 MB L3 cache provides a decisive edge. The second-largest AMD win is in PassMark physics, where AMD scores 5053 versus Intel's 3441, a 46.8% lead. That result suggests AMD's core architecture handles physics simulation more efficiently. AMD also wins PassMark extended instructions by 21.4% (58515 vs 48217) and Cinebench R15 multicore by 15.4% (5974 vs 5177). In 3DMark 16-thread, AMD takes 13180 against Intel's 11616, a 13.5% win. Smaller AMD wins include PassMark multithread (2.9%), random string sorting (2.8%), and integer math (1.5%). These are narrow but consistent margins across integer and data-handling tasks.

The Intel Core i9-13900KS posts the largest wins in the opposite direction. Cinebench R23 single-core shows Intel at 7252 versus AMD's 2053, a 71.7% gap. Cinebench R15 single-core is similarly lopsided, with Intel at 730 and AMD at 326, a 55.3% difference. These are not close contests; Intel's single-core performance is in a different class. In 3DMark single-thread, Intel leads by 13.4% (1226 vs 1062). The 3DMark multi-threaded tests all favor Intel: 2-thread by 12.9% (2412 vs 2102), 4-thread by 13.3% (4754 vs 4123), 8-thread by 13.3% (8812 vs 7641), and max-thread by 12.3% (16243 vs 14252). Cinebench R23 multicore is a major Intel win, with Intel scoring 51368 against AMD's 36291, a 29.4% lead. Geekbench multicore favors Intel by 5.3% (23607 vs 22363), and single-core by 8% (2771 vs 2548). PassMark floating point math goes to Intel by 15.8% (154805 vs 130403). PassMark single-thread and singlethread both show Intel at 4712 versus AMD's 4146, a 12% lead. PassMark data compression is Intel's by 3.7% (814838 vs 784993), and data encryption by 1.4% (47772 vs 47100).

The overall win tally is 15 for Intel and 8 for AMD. However, the average benchmark scores tell a different story: AMD's average is 65914, which is 2.9% higher than Intel's 64051. This suggests that AMD's wins, while fewer, are in tests that carry more weight in the aggregate, or that Intel's many wins are often by smaller margins. The data shows a processor that is better for heavily threaded, cache-sensitive workloads (AMD) versus one that is better for single-thread and lightly threaded performance (Intel). Both are top-tier desktop parts, but the choice depends entirely on the workload mix.