AMD Ryzen 5 PRO 9645 vs Intel Core i9-13900T Comparison

Head-to-Head Benchmarks

The benchmark data presents a clear overall winner in the Intel Core i9-13900T, which takes 8 of the 11 recorded head-to-head tests. However, the AMD Ryzen 5 PRO 9645 secures meaningful victories in single-threaded workloads and prime number finding, showing that the comparison is not one-sided.

The largest margin of victory belongs to Intel in data encryption, where the i9-13900T scores 34,415 against the Ryzen 5 PRO 9645's 17,599, a staggering 95.6% advantage. This is nearly double the AMD processor's output and reflects the Intel chip's substantial thread count advantage in a heavily parallelized workload. Similarly, floating point math shows Intel ahead by 73.4%, with scores of 108,779 versus 62,720, while integer math delivers a 69.1% lead for Intel at 157,324 against 93,019.

Data compression also favors the Intel part decisively, with a 48% delta (538,254 versus 363,736). Random string sorting follows a similar pattern, with Intel winning 63,358 to 38,410, a 65% margin. The multithread test, which aggregates overall parallel performance, shows Intel ahead by 36.9% at 43,036 versus 31,434. Even the physics test, often considered a more balanced measure of core efficiency, goes to Intel by 28.4% (2,497 versus 1,945).

The extended instructions test is effectively a tie: Intel scores 29,719 and AMD scores 29,705, a delta of 0%. This indicates that for certain SIMD-heavy workloads, the two processors deliver nearly identical throughput despite their architectural differences.

The AMD Ryzen 5 PRO 9645's wins are concentrated in two areas. The single-thread test (recorded twice in the database as passmark_single_thread and passmark_singlethread) shows AMD ahead by 9.9%, scoring 4,636 versus Intel's 4,177. Prime number finding also goes to AMD by 25.5%, with a score of 235 versus 175. These results indicate that the Zen 5 core design has a genuine per-thread performance advantage, even if the Intel chip's massive core count overwhelms it in most multithreaded scenarios.

The average benchmark scores reflect this overall picture: Intel sits at 61,723, while AMD trails at 58,916. Both processors occupy the 92nd percentile among all CPUs in the database, meaning they are both top-tier parts, but the Intel chip holds a clear aggregate edge.

Architecture Differences

The two processors come from fundamentally different design philosophies. The Intel Core i9-13900T is a Raptor Lake-S part built on Intel's 10 nm process, featuring 24 cores and 32 threads. The AMD Ryzen 5 PRO 9645 is a Granite Ridge chip built on TSMC's 4 nm node, with just 6 cores and 12 threads. This core count disparity, 24 versus 6, explains most of the benchmark gaps in multithreaded tests.

Cache configurations differ notably. Intel provides 2 MB of L2 cache per core and 36 MB of shared L3 cache. AMD offers 1 MB of L2 per core and 32 MB of shared L3. Both have 80 KB of L1 per core. The Intel part's larger L2 and L3 allocations contribute to its strong showing in data-heavy workloads like compression and sorting.

Clock speeds tell a different story. The Intel chip has a base clock of 1.10 GHz and a boost clock of 5.30 GHz. The AMD part runs at 3.90 GHz base and 5.40 GHz boost. The AMD processor's higher base clock and slightly higher boost clock help explain its single-thread victory, while Intel's lower base clock is offset by the sheer number of cores available.

Power envelopes diverge sharply. Intel lists a TDP of 35 watts, while AMD lists 65 watts. This is notable because the Intel chip delivers higher multithreaded performance while drawing less rated power, though the database does not include measured power consumption figures to verify real-world behavior.

Memory support also differs. Intel supports both DDR4 and DDR5 in a dual-channel configuration. AMD supports only DDR5, also dual-channel, but with a recorded memory bandwidth of 89.6 GB/s, a figure not provided for the Intel part. Both processors support ECC memory.

PCIe connectivity favors AMD, which offers Gen 5 with 24 lanes from the CPU, versus Intel's Gen 5 with 20 lanes. The AMD part targets the server and workstation segment, while Intel's is a desktop part. Intel integrates UHD Graphics 770, while AMD includes Radeon Graphics.

The manufacturing details highlight the process node gap: Intel uses a 257 mm² die, while AMD's is just 70.6 mm² with 8,315 million transistors. The AMD chip is smaller and denser, which aligns with its newer 4 nm process versus Intel's 10 nm.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core i9-13900T has 24 cores and 32 threads, while the AMD Ryzen 5 PRO 9645 has 6 cores and 12 threads.

Q: Which CPU wins in single-threaded performance?

A: The AMD Ryzen 5 PRO 9645 wins the single-thread test, scoring 4,636 versus Intel's 4,177, a 9.9% advantage.

Q: How large is Intel's lead in data encryption?

A: Intel wins data encryption by 95.6%, scoring 34,415 against AMD's 17,599.

Q: Do both processors support ECC memory?

A: Yes, both the Intel Core i9-13900T and the AMD Ryzen 5 PRO 9645 list ECC memory support as true.

Q: What is the memory bandwidth of the AMD processor?

A: The AMD Ryzen 5 PRO 9645 records a memory bandwidth of 89.6 GB/s; no such figure is listed for the Intel part.

Q: Which CPU has a higher boost clock?

A: The AMD Ryzen 5 PRO 9645 reaches 5.40 GHz, slightly higher than the Intel Core i9-13900T's 5.30 GHz.

The Verdict

The data points to a straightforward conclusion for most workloads: the Intel Core i9-13900T is the stronger processor overall. Its average benchmark score of 61,723 exceeds the AMD Ryzen 5 PRO 9645's 58,916, and it wins 8 of 11 head-to-head tests. The margins in Intel's favor are often large, such as 95.6% in encryption and 73.4% in floating point math, indicating that any multithreaded, parallelized workload will run substantially faster on the Intel part.

The AMD Ryzen 5 PRO 9645 earns its place in systems where per-thread performance matters most. Its 9.9% single-thread lead and 25.5% advantage in prime number finding show that the Zen 5 architecture delivers superior single-core efficiency. For applications that are poorly threaded or latency-sensitive, the AMD chip will feel snappier per core.

However, the core count difference is decisive in aggregate. The Intel chip's 24 cores versus AMD's 6 cores means that any workload that scales across threads will favor Intel by wide margins. The Intel part also achieves this while listing a lower TDP of 35 watts versus AMD's 65 watts, though actual power draw is not recorded in the database.

For buyers prioritizing maximum throughput in rendering, compilation, data processing, or any parallel task, the Intel Core i9-13900T is the clear choice from the recorded data. For users running lightly threaded applications or workloads that depend heavily on single-core speed, the AMD Ryzen 5 PRO 9645 offers a measurable advantage, though its overall score is lower.

Specification Differences

The two processors differ in nearly every major specification category. Intel ships with 24 cores and 32 threads, while AMD provides 6 cores and 12 threads. Intel's base clock is 1.10 GHz versus AMD's 3.90 GHz, and Intel's boost clock is 5.30 GHz versus AMD's 5.40 GHz. TDP is 35 watts for Intel and 65 watts for AMD.

Sockets differ: Intel uses Socket 1700, while AMD uses Socket AM5. The process node is 10 nm for Intel (foundry: Intel) and 4 nm for AMD (foundry: TSMC). AMD lists 8,315 million transistors and a 70.6 mm² die size; Intel lists a 257 mm² die size with no transistor count.

Cache differs in L2 and L3: Intel has 2 MB L2 per core and 36 MB shared L3, while AMD has 1 MB L2 per core and 32 MB shared L3. Both have 80 KB L1 per core. Memory support: Intel supports DDR4 and DDR5, while AMD supports only DDR5. AMD lists 89.6 GB/s memory bandwidth; Intel does not. PCIe: Intel offers Gen 5 with 20 lanes, AMD offers Gen 5 with 24 lanes.

Integrated graphics: Intel has UHD Graphics 770, AMD has Radeon Graphics. Market segment: Intel is desktop, AMD is server/workstation. Release dates: Intel launched on 2023-01-03, AMD on 2025-09-15. Intel has a launch MSRP of $549; AMD has no recorded launch MSRP. Intel's part number is not listed; AMD's is 100-000001409. Both are active in production, both support ECC, and neither has an unlocked multiplier.

Where Each One Wins

The Intel Core i9-13900T is the winner in any workload that leverages multiple cores. Data compression, encryption, floating point math, integer math, multithreaded benchmarks, physics simulations, and random string sorting all go to Intel, with deltas ranging from 28.4% to 95.6%. The physics test, which often reflects real-world gaming and simulation performance, favors Intel by 28.4%. The multithread test, a broad measure of parallel capability, favors Intel by 36.9%.

The AMD Ryzen 5 PRO 9645 wins in single-threaded performance and prime number finding. The single-thread score of 4,636 versus 4,177 gives AMD a 9.9% edge, which matters for applications that cannot use multiple cores effectively. Prime number finding, a workload that stresses integer arithmetic and branch prediction, goes to AMD by 25.5%. The extended instructions test is a tie, so neither chip claims an advantage there.

The practical split is clear: choose the Intel Core i9-13900T for heavily parallel workloads, content creation, scientific computing, and any task where core count dominates. Choose the AMD Ryzen 5 PRO 9645 for single-thread-sensitive applications, legacy software, or scenarios where per-core speed is the bottleneck. The Intel chip's higher aggregate score and wider benchmark wins make it the default recommendation from the recorded data, but the AMD part's single-thread superiority is a genuine, measurable strength that should not be ignored.