Ryzen 5 8645HS vs Ryzen 7 7840HS: specs and benchmark comparison
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 AIAdvantages
Only measured and rated values: a noticeable benchmark gap and specs where more is better.
Where Ryzen 5 8645HS is better0
No advantages found in our data.
Where Ryzen 7 7840HS is better3
Cores 2 more8 vs 6
Threads 4 more16 vs 12
L2 cache 2 MB more8 MB vs 6 MB
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
Ryzen 5 8645HS157.8 samples/minRyzen 7 7840HS214.8 samples/minNo advantage conclusion: small sample in one of the results.
About the measurement and source
- A · 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.
- B · AMD Ryzen 7 7840HS
214.8 samples/min · community measurement, sample 54 · November 15, 2026
Blender Open Data (Blender Foundation)
Median of 54 submissions (4 outliers excluded), interquartile range 201.79–230.41; submissions 2025-07-18 to 2026-10-23; 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 (15)
| Benchmark | A | B | Difference |
|---|---|---|---|
| Blender Benchmark 4.2.0CPU, sum of scenes monster + junkshop + classroom | 145.1 | 206.8 | reference |
| Blender Benchmark 5.1.1CPU, sum of scenes monster + junkshop + classroom | 194.6 | 238.1 | reference |
| Blender Benchmark 5.2.0CPU, sum of scenes monster + junkshop + classroom | 148.1 | 217.6 | reference |
| Blender Benchmark 4.1.0CPU, sum of scenes monster + junkshop + classroom | 150.4 | 216.7 | reference |
| Blender Benchmark 4.3.0CPU, sum of scenes monster + junkshop + classroom | 159.1 | 206.5 | reference |
| Blender Benchmark 4.4.0CPU, sum of scenes monster + junkshop + classroom | 138.4 | 213.1 | reference |
| Blender Benchmark 5.1.0CPU, sum of scenes monster + junkshop + classroom | 158.3 | 239.7 | reference |
| Blender Benchmark 5.3.0CPU, sum of scenes monster + junkshop + classroom | 190.2 | — | no pair |
| Blender Benchmark 3.2.1CPU, sum of scenes monster + junkshop + classroom | — | 244.4 | no pair |
| Blender Benchmark 3.3.0CPU, sum of scenes monster + junkshop + classroom | — | 255 | no pair |
| Blender Benchmark 3.4.0CPU, sum of scenes monster + junkshop + classroom | — | 238.3 | no pair |
| Blender Benchmark 3.5.0CPU, sum of scenes monster + junkshop + classroom | — | 169.3 | no pair |
| Blender Benchmark 3.6.0CPU, sum of scenes monster + junkshop + classroom | — | 224.8 | no pair |
| Blender Benchmark 4.0.0CPU, sum of scenes monster + junkshop + classroom | — | 227.9 | no pair |
| Blender Benchmark 5.0.0CPU, sum of scenes monster + junkshop + classroom | — | 229.1 | no 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.
| Specification | A · Ryzen 5 8645HS | B · Ryzen 7 7840HS | Difference |
|---|---|---|---|
| Cores and clocks | |||
| CoresCores of different types may differ in performance. | 6 | 8 | B: 2 more |
| Threads | 12 | 16 | B: 4 more |
| Base clockFor hybrid Intel CPUs, the P-core base clock is shown. | 4.3 GHz | 3.8 GHz | A: 0.5 GHz more |
| Max clock (Boost/Turbo) | 5 GHz | 5.1 GHz | B: 0.1 GHz more |
| Cache | |||
| L1 cache | no data | 512 KB | no data for A |
| L2 cache | 6 MB | 8 MB | B: 2 MB more |
| L3 cache | 16 MB | 16 MB | equal |
| Platform | |||
| Socket | FP7, FP7r2, FP8 | FP7, FP7r2, FP8 | equal |
| Process node | TSMC 4 nm FinFET | TSMC 4 nm FinFET | equal |
| Memory and interfaces | |||
| Memory type | DDR5, LPDDR5x | DDR5, LPDDR5x | equal |
| Memory channels | 2 | 2 | equal |
| Official memory speedFor controllers that support two generations, the speed for the newer memory type is shown. | 5,600 MT/s | 5,600 MT/s | equal |
| Max memory capacity | no data | 256 GB | no data for A |
| PCI Express | PCIe 4.0 | PCIe 4.0 | equal |
| Integrated graphics | AMD Radeon 760M | AMD Radeon 780M | differs |
| Power | |||
| TDP (AMD method)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. | 45 W (configurable: 35–54 W) | 35–54 W | not directly comparable |
Cores and clocks
Cores
A6
B8
B: 2 moreCores of different types may differ in performance.
Threads
A12
B16
B: 4 moreBase clock
A4.3 GHz
B3.8 GHz
A: 0.5 GHz moreFor hybrid Intel CPUs, the P-core base clock is shown.
Max clock (Boost/Turbo)
A5 GHz
B5.1 GHz
B: 0.1 GHz more
Cache
L1 cache
Ano data
B512 KB
no data for AL2 cache
A6 MB
B8 MB
B: 2 MB moreL3 cache
A16 MB
B16 MB
equal
Platform
Socket
AFP7, FP7r2, FP8
BFP7, FP7r2, FP8
equalProcess node
ATSMC 4 nm FinFET
BTSMC 4 nm FinFET
equal
Memory and interfaces
Memory type
ADDR5, LPDDR5x
BDDR5, LPDDR5x
equalMemory channels
A2
B2
equalOfficial memory speed
A5,600 MT/s
B5,600 MT/s
equalFor controllers that support two generations, the speed for the newer memory type is shown.
Max memory capacity
Ano data
B256 GB
no data for APCI Express
APCIe 4.0
BPCIe 4.0
equalIntegrated graphics
AAMD Radeon 760M
BAMD Radeon 780M
differs
Power
TDP (AMD method)
A45 W (configurable: 35–54 W)
B35–54 W
not directly comparableAMD 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.
Questions and answers
Do AMD Ryzen 5 8645HS and AMD Ryzen 7 7840HS 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 8645HS and AMD Ryzen 7 7840HS have?
AMD Ryzen 5 8645HS: 6 cores / 12 threads. AMD Ryzen 7 7840HS: 8 cores / 16 threads (manufacturer data).
Do these CPUs have integrated graphics?
AMD Ryzen 5 8645HS: AMD Radeon 760M. AMD Ryzen 7 7840HS: AMD Radeon 780M.
See also
Data sources (2)
- AMD — specifications of AMD Ryzen 5 8645HS, specifications of AMD Ryzen 7 7840HSchecked 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 3.2.1, benchmark Blender Benchmark 3.3.0, benchmark Blender Benchmark 3.4.0, benchmark Blender Benchmark 3.5.0, 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 5.3.0checked November 14, 2026
How we compare: methodology. Where the data comes from: sources.