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Ryzen 5 7640U vs Ryzen 5 8645HS: specs and benchmark comparison

AAMD · Zen 4

AMD Ryzen 5 7640U

  • 6 cores / 12 threads
  • up to 4.9 GHz
  • FP7, FP7r2, FP8

May 3, 2023

BAMD · Zen 4

AMD Ryzen 5 8645HS

  • 6 cores / 12 threads
  • up to 5 GHz
  • FP7, FP7r2, FP8

Short verdict

Not enough data for a performance conclusion: the database has no comparable benchmarks for this pair. Below are the key differences in official specifications.

Compare with AI

Advantages

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

Where Ryzen 5 7640U is better0

No advantages found in our data.

Where Ryzen 5 8645HS is better0

No advantages found in our data.

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

    No advantage conclusion: small sample in one of the results.

    About the measurement and source
    A · AMD Ryzen 5 7640U

    181.6 samples/min · community measurement, sample 3 · November 15, 2026

    Blender Open Data (Blender Foundation)

    Median of 3 submissions (1 outliers excluded), interquartile range 180.68–183.69; submissions 2025-08-19 to 2025-12-29; CPU backend. Snapshot 2026-11-15.

    B · AMD Ryzen 5 8645HS

    157.8 samples/min · community measurement, sample 11 · November 15, 2026

    Blender Open Data (Blender Foundation)

    Median of 11 submissions (2 outliers excluded), interquartile range 150.54–162.15; submissions 2025-07-27 to 2026-02-28; CPU backend. Snapshot 2026-11-15.

    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.

Reference results (11)
BenchmarkABDifference
Blender Benchmark 4.2.0CPU, sum of scenes monster + junkshop + classroom172.2145.1reference
Blender Benchmark 5.1.1CPU, sum of scenes monster + junkshop + classroom150.1194.6reference
Blender Benchmark 5.2.0CPU, sum of scenes monster + junkshop + classroom176.6148.1reference
Blender Benchmark 3.4.0CPU, sum of scenes monster + junkshop + classroom127.6—no pair
Blender Benchmark 3.6.0CPU, sum of scenes monster + junkshop + classroom106.7—no pair
Blender Benchmark 4.0.0CPU, sum of scenes monster + junkshop + classroom140.8—no pair
Blender Benchmark 4.3.0CPU, sum of scenes monster + junkshop + classroom182159.1reference
Blender Benchmark 4.4.0CPU, sum of scenes monster + junkshop + classroom167.1138.4reference
Blender Benchmark 5.1.0CPU, sum of scenes monster + junkshop + classroom154.5158.3reference
Blender Benchmark 4.1.0CPU, sum of scenes monster + junkshop + classroom—150.4no pair
Blender Benchmark 5.3.0CPU, sum of scenes monster + junkshop + classroom—190.2no 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

    A6

    B6

    equal

    Cores of different types may differ in performance.

  • Threads

    A12

    B12

    equal

  • Base clock

    A3.5 GHz

    B4.3 GHz

    B: 0.8 GHz more

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

  • Max clock (Boost/Turbo)

    A4.9 GHz

    B5 GHz

    B: 0.1 GHz more

Cache

  • L2 cache

    A6 MB

    B6 MB

    equal

  • L3 cache

    A16 MB

    B16 MB

    equal

Platform

  • Socket

    AFP7, FP7r2, FP8

    BFP7, FP7r2, FP8

    equal

  • Process node

    ATSMC 4 nm FinFET

    BTSMC 4 nm FinFET

    equal

Memory and interfaces

  • Memory type

    ADDR5, LPDDR5x

    BDDR5, LPDDR5x

    equal

  • Memory channels

    A2

    B2

    equal

  • Official memory speed

    A5,600 MT/s

    B5,600 MT/s

    equal

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

  • Max memory capacity

    A256 GB

    Bno data

    no data for B

  • PCI Express

    APCIe 4.0

    BPCIe 4.0

    equal

  • Integrated graphics

    AAMD Radeon 760M

    BAMD Radeon 760M

    equal

Power

  • TDP (AMD method)

    A28 W (configurable: 15–30 W)

    B45 W (configurable: 35–54 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 5 7640U and AMD Ryzen 5 8645HS fit the same motherboard?

Both CPUs use the FP7, FP7r2, FP8 socket. Support on a specific board depends on the chipset and BIOS version, so check the board maker’s CPU support list.

How many cores and threads do AMD Ryzen 5 7640U and AMD Ryzen 5 8645HS have?

AMD Ryzen 5 7640U: 6 cores / 12 threads. AMD Ryzen 5 8645HS: 6 cores / 12 threads (manufacturer data).

Do these CPUs have integrated graphics?

AMD Ryzen 5 7640U: AMD Radeon 760M. AMD Ryzen 5 8645HS: AMD Radeon 760M.

Data sources (2)
  • AMD — specifications of AMD Ryzen 5 7640U, specifications of AMD Ryzen 5 8645HSchecked 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 3.4.0, benchmark Blender Benchmark 3.6.0, benchmark Blender Benchmark 4.0.0, benchmark Blender Benchmark 4.3.0, benchmark Blender Benchmark 4.4.0, benchmark Blender Benchmark 5.1.0, benchmark Blender Benchmark 4.1.0, benchmark Blender Benchmark 5.3.0checked November 14, 2026

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

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