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Ryzen 9 7945HX vs Ryzen 9 9900X: specs and benchmark comparison

AAMD · Zen 4

AMD Ryzen 9 7945HX

  • 16 cores / 32 threads
  • up to 5.4 GHz
  • FL1

February 28, 2023

BAMD · Zen 5

AMD Ryzen 9 9900X

  • 12 cores / 24 threads
  • up to 5.6 GHz
  • AM5

August 15, 2024 · $499 at launch

Short verdict

In the available comparable benchmarks the difference is below the noticeable threshold, so no significant advantage was found.

Compare with AI
← Ryzen 9 7945HXRyzen 9 9900X →

  • Multi-thread performance

    ≈ parity

    The difference in available benchmarks is below the noticeable threshold, so there is no significant advantage.

No comparable benchmarks yet: single-thread performance, gaming (cpu-bound scenarios), power efficiency.

Advantages

Only measured and rated values: a noticeable benchmark gap and specs where more is better.

Where Ryzen 9 7945HX is better4

  • Cores 4 more16 vs 12

  • Threads 8 more32 vs 24

  • L1 cache 64 KB more1,024 KB vs 960 KB

  • L2 cache 4 MB more16 MB vs 12 MB

Where Ryzen 9 9900X is better2

  • Official memory speed 400 MT/s more5,600 MT/s vs 5,200 MT/s

  • Max memory capacity 192 GB more256 GB vs 64 GB

Benchmarks

Results are compared within one benchmark, one version and the same conditions. Laptop chip results depend on the laptop model: its maker sets the power limit and cooling.

  • Blender Benchmark 4.5.0

    CPU, sum of scenes monster + junkshop + classroom · samples/min, higher is better

    2.3% difference, within the threshold

    Position among tested models (89)

    A · 493B · 505
    0200400600800
    Each dot is one model’s median in this benchmark. The scale starts at zero, samples/min.

    The 2.3% difference is below the noticeable threshold (5%).

    About the measurement and source
    A · AMD Ryzen 9 7945HX

    493.5 samples/min · community measurement, sample 51 · November 15, 2026

    Blender Open Data (Blender Foundation)

    Median of 51 submissions (3 outliers excluded), interquartile range 453.05–558.01; submissions 2025-07-19 to 2026-03-07; CPU backend. Snapshot 2026-11-15.

    B · AMD Ryzen 9 9900X

    505 samples/min · community measurement, sample 368 · November 14, 2026

    Blender Open Data (Blender Foundation)

    Median of 368 submissions (16 outliers excluded), interquartile range 464.31–517.85; submissions 2025-07-17 to 2026-10-21; CPU backend. Snapshot 2026-11-14.

    difference = |A − B| ÷ the smaller value × 100%. The 5% noticeable threshold is a UX heuristic, not statistical significance.

    Cycles render in Blender Benchmark. Median of the sum of samples per minute over three scenes after removing outliers.

Other comparable benchmarks (3)
BenchmarkABDifference
Blender Benchmark 4.2.0CPU, sum of scenes monster + junkshop + classroom443.1450.6B +1.7%
Blender Benchmark 4.3.0CPU, sum of scenes monster + junkshop + classroom465.5446.9A +4.2%
Blender Benchmark 4.4.0CPU, sum of scenes monster + junkshop + classroom477.2480.2B +0.6%

Each benchmark version has its own scale: numbers are compared only within a row.

Reference results (10)
BenchmarkABDifference
Blender Benchmark 5.1.1CPU, sum of scenes monster + junkshop + classroom521.7520.1reference
Blender Benchmark 5.2.0CPU, sum of scenes monster + junkshop + classroom473.9511.2reference
Blender Benchmark 3.4.0CPU, sum of scenes monster + junkshop + classroom521.6—no pair
Blender Benchmark 3.5.0CPU, sum of scenes monster + junkshop + classroom500.5—no pair
Blender Benchmark 3.6.0CPU, sum of scenes monster + junkshop + classroom475.7331.4reference
Blender Benchmark 4.0.0CPU, sum of scenes monster + junkshop + classroom455.9474.9reference
Blender Benchmark 4.1.0CPU, sum of scenes monster + junkshop + classroom481.1474.3reference
Blender Benchmark 5.0.0CPU, sum of scenes monster + junkshop + classroom211.8452.3reference
Blender Benchmark 5.1.0CPU, sum of scenes monster + junkshop + classroom552.5537reference
Blender Benchmark 5.3.0CPU, sum of scenes monster + junkshop + classroom—545no pair

Each benchmark version has its own scale: numbers are compared only within a row.

Specifications

Chip maker values. The laptop maker sets the power limit and clocks in each laptop.

Cores and clocks

  • Cores

    A16

    B12

    A: 4 more

    Cores of different types may differ in performance.

  • Threads

    A32

    B24

    A: 8 more

  • Base clock

    A2.5 GHz

    B4.4 GHz

    B: 1.9 GHz more

    For hybrid Intel CPUs, the P-core base clock is shown.

  • Max clock (Boost/Turbo)

    A5.4 GHz

    B5.6 GHz

    B: 0.2 GHz more

  • Unlocked multiplier

    Ano data

    Byes

    no data for A

Cache

  • L1 cache

    A1,024 KB

    B960 KB

    A: 64 KB more

  • L2 cache

    A16 MB

    B12 MB

    A: 4 MB more

  • L3 cache

    A64 MB

    B64 MB

    equal

Platform

  • Socket

    AFL1

    BAM5

    differs

  • Process node

    ATSMC 5 nm FinFET

    BTSMC 4 nm FinFET

    differs

Memory and interfaces

  • Memory type

    ADDR5

    BDDR5

    equal

  • Memory channels

    A2

    B2

    equal

  • Official memory speed

    A5,200 MT/s

    B5,600 MT/s

    B: 400 MT/s more

    For controllers that support two generations, the speed for the newer memory type is shown.

  • Max memory capacity

    A64 GB

    B256 GB

    B: 192 GB more

  • PCI Express

    APCIe 5.0

    BPCIe 5.0

    equal

  • Integrated graphics

    AAMD Radeon 610M

    BAMD Radeon Graphics (2 CU)

    differs

Power

  • TDP (AMD method)

    A55 W (configurable: 55–75 W)

    B120 W

    not directly comparable

    AMD TDP, AMD PPT, Intel Base Power (PL1) and Max Turbo Power (PL2) are different metrics and are not compared with each other. For laptop CPUs, the laptop maker configures the TDP.

“More” does not always mean “better”: higher power draw or size is a system requirement, not an advantage (such bars are dimmed).

Compare with AI

An AI model reviews the specs and benchmarks of this pair and gives a plain-language verdict on who each model suits.

AI verdict

Questions and answers

Do AMD Ryzen 9 7945HX and AMD Ryzen 9 9900X fit the same motherboard?

No: AMD Ryzen 9 7945HX uses FL1, while AMD Ryzen 9 9900X uses AM5.

How many cores and threads do AMD Ryzen 9 7945HX and AMD Ryzen 9 9900X have?

AMD Ryzen 9 7945HX: 16 cores / 32 threads. AMD Ryzen 9 9900X: 12 cores / 24 threads (manufacturer data).

Do these CPUs have integrated graphics?

AMD Ryzen 9 7945HX: AMD Radeon 610M. AMD Ryzen 9 9900X: AMD Radeon Graphics (2 CU).

Which is faster: AMD Ryzen 9 7945HX or AMD Ryzen 9 9900X?

In the available comparable benchmarks the difference is below the noticeable threshold, so no significant advantage was found.

Data sources (3)
  • AMD — specifications of AMD Ryzen 9 7945HX, specifications of AMD Ryzen 9 9900Xchecked November 7, 2026
  • Blender Open Data (Blender Foundation) — benchmark Blender Benchmark 4.2.0, benchmark Blender Benchmark 4.5.0, benchmark Blender Benchmark 5.1.1, benchmark Blender Benchmark 5.2.0, benchmark Blender Benchmark 3.6.0, benchmark Blender Benchmark 4.0.0, benchmark Blender Benchmark 4.1.0, benchmark Blender Benchmark 4.3.0, benchmark Blender Benchmark 4.4.0, benchmark Blender Benchmark 5.0.0, benchmark Blender Benchmark 5.1.0, benchmark Blender Benchmark 5.3.0, benchmark Blender Benchmark 3.4.0, benchmark Blender Benchmark 3.5.0checked November 14, 2026
  • Wikipedia (English) — release date and launch pricechecked November 14, 2026

How we compare: methodology. Where the data comes from: sources.

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