AMD Ryzen Threadripper 9970X vs Intel Core Ultra 5 250KF Plus Comparison

The AMD Ryzen Threadripper 9970X and Intel Core Ultra 5 250KF Plus occupy opposite ends of the desktop processor spectrum, yet both target active workloads with unlocked multipliers and ECC memory support. The database records the Threadripper 9970X as a 32-core, 64-thread Zen 5 part on AMD Socket sTR5, while the Core Ultra 5 250KF Plus is an 18-core, 18-thread Arrow Lake Refresh design on Intel Socket 1851. Their benchmark results show a lopsided rivalry in multi-threaded tasks, but the Intel part claims a narrow victory in single-thread performance, making this comparison a study in core-count scaling versus per-core efficiency.

FAQ

Q: Which processor has more cores and threads?

A: The AMD Ryzen Threadripper 9970X has 32 cores and 64 threads, while the Intel Core Ultra 5 250KF Plus has 18 cores and 18 threads. The AMD part does not use simultaneous multithreading for its thread count doubling, whereas the Intel part has a 1:1 core-to-thread ratio.

Q: What is the average benchmark score difference between the two?

A: The AMD Ryzen Threadripper 9970X has an average benchmark score of 279,778, which places it in the 99th percentile of all CPUs. The Intel Core Ultra 5 250KF Plus has an average benchmark score of 66,159, placing it in the 93rd percentile.

Q: Which processor wins in single-thread performance?

A: The Intel Core Ultra 5 250KF Plus wins in the PassMark single-thread test with a score of 4,698, compared to the AMD Ryzen Threadripper 9970X's score of 4,530. This gives Intel a 3.6% advantage.

Q: How large is the multi-threaded benchmark gap?

A: In the PassMark multithread test, the AMD Ryzen Threadripper 9970X scores 107,399, which is 114.2% higher than the Intel Core Ultra 5 250KF Plus's 50,146. The AMD part also wins the physics test by 114.7%.

Q: Do both processors support ECC memory?

A: Yes, both the AMD Ryzen Threadripper 9970X and the Intel Core Ultra 5 250KF Plus support ECC memory. Both also use DDR5 memory, though the AMD part runs quad-channel while the Intel part uses dual-channel.

Q: Which processor has a higher boost clock?

A: The AMD Ryzen Threadripper 9970X has a boost clock of 5.40 GHz, which is higher than the Intel Core Ultra 5 250KF Plus's boost clock of 5.30 GHz. The Intel part has a higher base clock at 4.20 GHz versus 4.00 GHz.

Architecture Differences

The fundamental architectural split between these two processors comes down to core design philosophy and platform scope. The AMD Ryzen Threadripper 9970X uses the Zen 5 architecture, codenamed Shimada Peak, built on a 4 nm process at TSMC. It packs 33,260 million transistors across a multi-chiplet design with four 70.6 mm² dies. The Intel Core Ultra 5 250KF Plus uses the Arrow Lake Refresh architecture on a 3 nm process, also from TSMC, with 17,800 million transistors on a single 243 mm² die.

Cache hierarchies differ substantially. The Threadripper 9970X provides 64 KB of L1 cache per core, 1 MB of L2 per core, and a massive 128 MB of shared L3 cache. The Core Ultra 5 250KF Plus offers 192 KB of L1 per core, 3 MB of L2 per core, and only 30 MB of shared L3. While the Intel part has larger per-core L1 and L2 allocations, the AMD part's total L3 capacity is over four times larger, which benefits heavily threaded workloads that need to share data across many cores.

Memory channels also separate the two designs. The Threadripper 9970X uses quad-channel DDR5 with a theoretical bandwidth of 204.8 GB/s, while the Core Ultra 5 250KF Plus uses dual-channel DDR5 with 115.2 GB/s. PCIe connectivity is similarly uneven: the AMD part provides Gen 5 with 80 lanes (CPU only), whereas the Intel part offers Gen 5 with 20 lanes (CPU only). Both processors have no integrated graphics, and both have unlocked multipliers.

Process node differences show Intel's part using a more advanced 3 nm node versus AMD's 4 nm, but the AMD design compensates with more cores and a larger cache pool. The Threadripper 9970X also targets a different market segment (desktop, but clearly workstation-oriented) with a 350 W TDP, while the Core Ultra 5 250KF Plus is a conventional desktop part at 125 W TDP. Release dates differ as well: the AMD part launched in July 2025, while the Intel part launched in March 2026.

Head-to-Head Benchmarks

The recorded head-to-head data shows the AMD Ryzen Threadripper 9970X winning 9 of 11 benchmark comparisons, with the Intel Core Ultra 5 250KF Plus taking the remaining 2. The largest victory for AMD comes in PassMark integer math, where the Threadripper 9970X scores 465,378 versus 123,030, a delta of 278.3%. This result reflects the core count advantage in pure arithmetic throughput.

Extended instruction performance shows a similar pattern. The AMD part scores 142,342 in PassMark extended instructions, which is 232% higher than the Intel part's 42,880. Data compression favors the AMD part by 217.8%, with scores of 1,757,998 versus 553,155. Random string sorting also goes to AMD by 184.9%, at 191,445 versus 67,209.

Floating-point math delivers a 93.8% win for the Threadripper 9970X, scoring 309,719 versus 159,824. Data encryption is another substantial win for AMD at 110.1%, with 86,765 versus 41,292. Prime number finding is closer, with AMD leading 615 to 452, a delta of 36.1%. Physics tests show AMD ahead by 114.7%, scoring 6,835 versus 3,183.

The two wins for Intel come in single-thread tests. PassMark single-thread and singlethread both record the same scores: Intel at 4,698 and AMD at 4,530, giving Intel a 3.6% edge. This is a modest margin, and it does not offset the multi-threaded dominance. The multithread test itself shows AMD at 107,399 versus Intel's 50,146, a 114.2% lead.

Relative to their nearest rivals, the Threadripper 9970X sits slightly below the Intel Xeon 6780E (delta of -0.2%), the AMD EPYC 9565 (-2%), the Intel Xeon 696X (-2.2%), and the AMD EPYC 9555P (-2.5%). The Core Ultra 5 250KF Plus is nearly tied with the Intel Core 9 273PQE (delta of 0.1%), slightly above the AMD Ryzen 9 7950X3D (0.4%), and below the Intel Core Ultra 5 250K Plus (-1%) and the AMD EPYC 4465P (-1.1%). These positioning data confirm that the Threadripper part competes in the server-class segment, while the Intel part holds its own among high-end desktop chips.

Specification Differences

The two processors differ across nearly every core specification. The AMD Ryzen Threadripper 9970X has 32 cores and 64 threads, while the Intel Core Ultra 5 250KF Plus has 18 cores and 18 threads. Base clocks are 4.00 GHz for AMD and 4.20 GHz for Intel, while boost clocks are 5.40 GHz for AMD and 5.30 GHz for Intel. The TDP rating is 350 W for the AMD part versus 125 W for the Intel part.

Process technology differs by one node step: AMD uses 4 nm, Intel uses 3 nm, both from TSMC. The transistor count is 33,260 million for AMD and 17,800 million for Intel. Die size is 4x 70.6 mm² for the Threadripper 9970X versus a single 243 mm² for the Core Ultra 5 250KF Plus.

Cache specifications are distinct: AMD offers 64 KB L1 per core, 1 MB L2 per core, and 128 MB L3, while Intel offers 192 KB L1 per core, 3 MB L2 per core, and 30 MB L3 shared. Memory bus width is quad-channel for AMD and dual-channel for Intel, with corresponding bandwidth figures of 204.8 GB/s versus 115.2 GB/s. PCIe lanes are 80 (Gen 5) for AMD and 20 (Gen 5) for Intel.

The socket platforms are incompatible: AMD Socket sTR5 versus Intel Socket 1851. Architecture names also differ: Zen 5 (Shimada Peak) for AMD versus Arrow Lake Refresh for Intel. The part numbers are 100-000001594 for AMD and SA4V3 for Intel. Both processors are active in production, have no integrated graphics, support ECC, and have unlocked multipliers.

Where Each One Wins

The AMD Ryzen Threadripper 9970X wins in every multi-threaded and compute-heavy scenario recorded in the database. Its 278.3% lead in integer math, 232% lead in extended instructions, and 217.8% lead in data compression make it the clear choice for workloads that scale with core count and cache capacity. The 128 MB L3 cache and quad-channel memory bandwidth position it for data-intensive tasks, such as large dataset processing, virtualization, and content creation pipelines that can use 64 threads. Its 99th percentile ranking among all CPUs and average score of 279,778 put it in the same tier as server processors like the Intel Xeon 6780E and AMD EPYC 9565, both of which it trails by less than 2.5%.

The Intel Core Ultra 5 250KF Plus wins only in single-thread performance, with a 3.6% edge over the Threadripper 9970X. This advantage, combined with a higher base clock of 4.20 GHz, makes it suitable for lightly threaded applications such as legacy software, certain simulation tools, or interactive workloads where per-core latency matters more than total throughput. Its 93rd percentile ranking and average score of 66,159 place it near the AMD Ryzen 9 7950X3D, which it leads by 0.4%, and the Intel Core Ultra 5 250K Plus, which leads it by 1%. The Intel part also consumes far less power at 125 W TDP and uses a smaller die, but the database does not record power efficiency metrics beyond TDP.

The data shows a clear split: the Threadripper 9970X dominates any workload that can use more than 18 threads, while the Core Ultra 5 250KF Plus holds a narrow but real advantage in single-threaded tasks. For users running multi-threaded benchmarks like PassMark multithread, physics, or encryption, the AMD part delivers at least double the score in most cases. For single-thread responsiveness, the Intel part is slightly faster, but that margin does not compensate for the 114.2% multithread deficit. The Threadripper 9970X also offers 4 times the PCIe lanes and nearly double the memory bandwidth, reinforcing its workstation orientation. The Core Ultra 5 250KF Plus offers a more conventional desktop form factor with lower power draw, but its performance class is an order of magnitude below the Threadripper in aggregate compute.