AMD Ryzen 9 7945HX vs Intel Core i9-13900T Comparison

The database places the Intel Core i9-13900T and AMD Ryzen 9 7945HX in an unusual matchup: a 35 W desktop part against a 55 W mobile flagship. Both launched on the same day, January 3, 2023, and both sit in the 92nd percentile of all recorded CPUs, with average benchmark scores of 61723 for the i9-13900T and 60099 for the 7945HX. Yet the head-to-head data tells a split story: the Ryzen 9 wins 10 of 15 shared tests, while the Core i9 takes the single-thread sweep and one major multi-core result. The gap in daily responsiveness versus sustained throughput is the core of this comparison.

Head-to-Head Benchmarks

Starting with single-core, the recorded data is unambiguous. In Cinebench R23 single-core the i9-13900T scores 5155 against 1940 for the 7945HX, a 165.7 percent advantage for Intel. Cinebench R15 single-core shows the same pattern: 519 versus 308, a 68.5 percent win for the i9-13900T. PassMark single-thread narrows it to 4177 versus 4040, still a 3.4 percent Intel edge. Every single-threaded test in the database favors the Intel part.

Multi-core results flip toward AMD in most, but not all, tests. The biggest exception is Cinebench R23 multi-core, where the i9-13900T scores 36517 against 33459, a 9.1 percent win for Intel. Cinebench R15 multi-core goes the other way, with the 7945HX scoring 5289 against 3680, a 30.4 percent advantage. The divergence between these two Cinebench generations is striking and worth noting when weighing which result matches a target workload.

PassMark's throughput tests favor the Ryzen consistently. PassMark multithread reads 54548 for the 7945HX versus 43036 for the i9-13900T, a 21.1 percent gap. Integer math shows 207524 against 157324 (Intel trails by 24.2 percent), floating point math shows 123390 against 108779 (11.8 percent), and extended instructions show 51834 against 29719, the widest AMD margin of the suite at 42.7 percent. Data compression lands at 707249 versus 538254 (23.9 percent), data encryption at 42703 versus 34415 (19.4 percent), random string sorting at 81736 versus 63358 (22.5 percent), and prime number finding at 284 versus 175 (38.4 percent). Physics is effectively tied: 2500 for AMD, 2497 for Intel, a 0.1 percent difference.

Architecture Differences

The two chips take opposite routes to 32 threads. Intel's Raptor Lake-S design, fabricated on Intel's 10 nm process, combines cores and threads for a total of 24 cores and 32 threads, built on a 257 mm² die. AMD's Dragon Range, fabricated by TSMC on a 5 nm process, uses 16 cores and 32 threads across two 71 mm² chiplets, with 13,140 million transistors recorded. Intel's hybrid layout carries more physical cores; AMD's is a uniform Zen 4 design on a denser node.

Clock behavior differs sharply. The i9-13900T runs a 1100.00 base clock with a 5.30 boost clock. The 7945HX starts at 2.50 base and boosts to 5.40, the higher peak of the two. The i9-13900T is rated at 35 W TDP versus 55 W for the 7945HX.

Cache allocations reflect the different philosophies. Intel gives each core 80 KB of L1 and 2 MB of L2, with 36 MB of shared L3. AMD provides 64 KB of L1 and 1 MB of L2 per core but a much larger 64 MB shared L3 pool, a decisive edge for workloads with large working sets.

Memory and platform support also diverge. The i9-13900T accepts both DDR4 and DDR5 over a dual-channel bus; the 7945HX is DDR5-only, dual-channel, with a recorded bandwidth of 83.2 GB/s. Both support ECC memory. On PCIe, both offer Gen 5, but AMD exposes 28 CPU lanes against Intel's 20. Integrated graphics differ: UHD Graphics 770 for Intel, Radeon 610M for AMD. The i9-13900T is a locked part (multiplierUnlocked false) on Socket 1700; the 7945HX has an unlocked multiplier on Socket FL1. Their segments differ too: desktop for Intel, mobile for AMD, though both remain in active production.

FAQ

Q: Which CPU is faster in single-threaded work?

A: The i9-13900T wins every single-thread test in the database. It leads by 165.7 percent in Cinebench R23 single-core (5155 versus 1940), 68.5 percent in Cinebench R15 single-core (519 versus 308), and 3.4 percent in PassMark single-thread (4177 versus 4040).

Q: Which CPU is faster in multi-threaded work?

A: It depends on the test. The 7945HX dominates most throughput suites, including PassMark multithread (54548 versus 43036, a 21.1 percent lead) and Cinebench R15 multi-core (5289 versus 3680). However, the i9-13900T takes Cinebench R23 multi-core with 36517 against 33459, a 9.1 percent advantage.

Q: How do they compare against their own nearest rivals?

A: Both sit in the 92nd percentile. The i9-13900T scores within a fraction of a percent of the Intel Core i9-13900K (-0.1 percent), Core Ultra 7 270HX Plus (-0.2 percent), and Core i9-13900KF (-0.2 percent), and 0.6 percent ahead of the Xeon 636. The 7945HX is dead even with the Ryzen 7 8745HX (0 percent), 0.2 percent ahead of the Core i9-14900F, 0.8 percent ahead of the Ryzen 9 7945HX3D, and 0.8 percent behind the Xeon Gold 6338T.

Q: Which chip has the larger cache?

A: The 7945HX, in shared L3: 64 MB versus 36 MB. Per-core cache favors Intel, with 80 KB of L1 and 2 MB of L2 per core against AMD's 64 KB and 1 MB.

Q: Do both support ECC memory and PCIe Gen 5?

A: Yes to both. The difference is lane count: the 7945HX provides 28 CPU Gen 5 lanes, the i9-13900T provides 20.

Q: Can either CPU be overclocked?

A: Only the 7945HX, whose multiplier is unlocked. The i9-13900T's multiplier is locked.

Specification Differences

The fields where the two parts diverge:

• Cores: 24 (i9-13900T) versus 16 (7945HX); both offer 32 threads.
• Base clock: 1100.00 MHz for Intel versus 2.50 GHz for AMD.
• Boost clock: 5.30 for Intel versus 5.40 for AMD.
• TDP: 35 W for Intel versus 55 W for AMD.
• Socket: Intel Socket 1700 versus AMD Socket FL1.
• Architecture and codename: Raptor Lake (Raptor Lake-S) versus Zen 4 (Dragon Range).
• Process node and foundry: Intel 10 nm at Intel versus TSMC 5 nm.
• Die configuration: single 257 mm² die versus two 71 mm² dies; only AMD has a transistor count recorded, 13,140 million.
• Cache: 80 KB L1 and 2 MB L2 per core plus 36 MB L3 for Intel, versus 64 KB L1 and 1 MB L2 per core plus 64 MB L3 for AMD.
• Memory: DDR4 and DDR5 for Intel, DDR5-only for AMD, with only AMD having a recorded bandwidth figure (83.2 GB/s); both dual-channel with ECC.
• PCIe: Gen 5 with 20 lanes for Intel versus Gen 5 with 28 lanes for AMD.
• Integrated graphics: UHD Graphics 770 versus Radeon 610M.
• Segment: Desktop versus Mobile.
• Multiplier: locked versus unlocked.
• Launch MSRP: only the i9-13900T has one recorded, $549.

Where Each One Wins

The 7945HX owns sustained, throughput-bound workloads. It wins 10 of 15 head-to-head tests, including every PassMark compute suite: integer math by 24.2 percent, floating point by 11.8 percent, extended instructions by 42.7 percent, compression by 23.9 percent, encryption by 19.4 percent, string sorting by 22.5 percent, and prime finding by 38.4 percent. Renderers and compute-heavy batch jobs of this kind are clearly its territory, and Cinebench R15 multi-core (30.4 percent ahead) reinforces that. Its 64 MB of shared L3 likely helps in data-heavy passes.

The i9-13900T owns responsiveness. Its single-thread margins are enormous in Cinebench (68.5 percent in R15, 165.7 percent in R23) and modest in PassMark (3.4 percent), and it also wins Cinebench R23 multi-core by 9.1 percent. Applications with one dominant thread, or workloads that mirror R23's rendering pattern, favor the Intel part. Physics is a statistical tie at 2497 versus 2500, so neither holds an advantage there.

The Verdict

The recorded data supports a clear split. For buyers whose work is latency-sensitive, lightly threaded, or aligned with Cinebench R23's rendering profile, the i9-13900T is the stronger pick: it wins that multi-core test by 9.1 percent and every single-thread contest, some by triple-digit percentages. Its 35 W rating and desktop platform are part of the same efficiency story the benchmarks tell.

For sustained parallel workloads, the 7945HX is the choice. It wins the overall head-to-head 10 tests to 5, posts double-digit leads across the entire PassMark throughput suite, and carries twice the shared L3 cache. Its average database score of 60099 places it even with the Ryzen 7 8745HX and ahead of the Ryzen 9 7945HX3D in its own cluster.

Overall the aggregate scores are close, 61723 versus 60099, and both sit in the 92nd percentile. Neither chip is universally faster. The i9-13900T is the single-thread champion of this pairing; the 7945HX is the throughput champion. Choose based on which of those two profiles the target workload resembles.