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InnoReviews

AMD Ryzen 7 8840U vs AMD Ryzen 7 H 255

WINNER
AMD Ryzen 7 8840U
57.4Inno Score
VS
AMD Ryzen 7 H 255
57.3Inno Score
62.9Single-core59.8
44.2Multi-core51
73.5Efficiencyspec-based53.8
68.5iGPU71.7
55.5Platformspec-based61.8
2 spec wins — AMD Ryzen 7 8840U8 spec wins — AMD Ryzen 7 H 255

InnoReviews verdict

This one is close to a dead heat: AMD Ryzen 7 8840U scores 57.4 against 57.3 for AMD Ryzen 7 H 255. Pick by the categories that matter to you — AMD Ryzen 7 8840U edges ahead in single-core, or by price.

Which would you pick?

Key differences

Reasons to pick the AMD Ryzen 7 8840U

  • Stronger single-core score: 63 vs 60
  • 38% lower Base TDP: 28 W vs 45 W

Reasons to pick the AMD Ryzen 7 H 255

  • Stronger multi-core score: 51 vs 44
  • Stronger iGPU score: 72 vs 69
  • 167% higher Max memory: 256 GB vs 96 GB
  • 80% higher Max TDP: 54 W vs 30 W
  • 32% higher Cinebench R23 (multi): 16,137 vs 12,191

General

General comparison: AMD Ryzen 7 8840U versus AMD Ryzen 7 H 255
SpecAMD Ryzen 7 8840UAMD Ryzen 7 H 255
Announced20232025
Process4 nm4 nm
Base TDP28 W+38%45 W
Max TDP30 W54 W+80%

Cores & Clocks

Cores & Clocks comparison: AMD Ryzen 7 8840U versus AMD Ryzen 7 H 255
SpecAMD Ryzen 7 8840UAMD Ryzen 7 H 255
Cores88
Performance cores88
Efficiency cores—0
Threads1616
Base clock3.3 GHz3.8 GHz+15%
Boost clock5.1 GHz+4%4.9 GHz
L3 cache16 MB16 MB

Integrated GPU

Integrated GPU comparison: AMD Ryzen 7 8840U versus AMD Ryzen 7 H 255
SpecAMD Ryzen 7 8840UAMD Ryzen 7 H 255
iGPUAMD Radeon 780MAMD Radeon 780M
iGPU clock2,700 MHz2,600 MHz

Memory

Memory comparison: AMD Ryzen 7 8840U versus AMD Ryzen 7 H 255
SpecAMD Ryzen 7 8840UAMD Ryzen 7 H 255
Memory supportDDR5-5600 / LPDDR5X-7500LPDDR5X-7500 / DDR5-5600
Max memory96 GB256 GB+167%

Benchmarks

Benchmarks comparison: AMD Ryzen 7 8840U versus AMD Ryzen 7 H 255
SpecAMD Ryzen 7 8840UAMD Ryzen 7 H 255
Geekbench 6 (single)—2,546Top 48%
Geekbench 6 (multi)—12,670Top 39%
Cinebench R23 (single)1,619Bottom 41%1,708+5%Top 50%
Cinebench R23 (multi)12,191Top 50%16,137+32%Top 32%
PassMark23,390Top 40%28,205+21%Top 25%
3DMark Time Spy Graphics (iGPU)2,659Top 23%3,077+16%Top 17%

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