AMD
AMD Ryzen 5 PRO 7645 vs AMD Ryzen 9 3900X
Full comparison of specs, performance and benchmarks
AMD
Ryzen 9 3900X
Aggregate performance score
We've compared Ryzen 5 PRO 7645 and Ryzen 9 3900X across specs and all relevant benchmarks.
↗Ryzen 9 3900X outperforms Ryzen 5 PRO 7645 by 20% based on our aggregate benchmark results.+20%
Scores are normalized on the Head to Head scale. Higher is better.AMD Ryzen 5 PRO 7645 vs AMD Ryzen 9 3900X: key takeaway
The comparison of Ryzen 5 PRO 7645 and Ryzen 9 3900X shows a 17% advantage for Ryzen 9 3900X in gaming performance, while Ryzen 5 PRO 7645 may still be stronger in value for money. Use the sections below to check whether that lead comes from real FPS, specifications, efficiency, price or platform features.
SUMMARY PROFILE
Verified-metrics radar
Axes with missing data are hidden; every value uses a fixed scale.
AMDPerformance
Single-core
Multi-core
L3 cache
Efficiency
1821
8577
3156
11
3525
COMPARISON RESULT
The devices received the same overall score
Ryzen 5 PRO 7645 leads in overall performance, while Ryzen 5 PRO 7645 offers better price-to-performance. Check results in your applications before making the final choice.
Performance is nearly identical
Ryzen 9 3900X costs less
OVERALL SCORE
Overview
Scores are calculated from specifications, performance, and efficiency.
The Summary score section compares Ryzen 5 PRO 7645 and Ryzen 9 3900X with normalized H2H data, turning specifications, tests and value signals into practical buying context.
GamesDirectX, OpenCL, and Vulkan performance
18
21Better
Professional applications3D modeling, video editing, and rendering
19
22Better
AI and machine learningMachine-learning and AI capabilities
17
19Better
Power efficiencyPower consumption across workloads
35Better
25
Head to Head scoreOverall catalog score
22
22
FULL COMPARISON
Specifications
The better numeric value is highlighted in green, taking the metric direction into account.
The Specifications section compares Ryzen 5 PRO 7645 and Ryzen 9 3900X with normalized H2H data, turning specifications, tests and value signals into practical buying context.
Release date20222019
Device classDesktopDesktop
PassMark2710632659Better
PBP / MTP65 W105 WBetter
Integrated graphicsNavi II 2CU 2,2 GHzNo
Power consumption65 WBetter105 W
Process node5 nmBetter7 nm
Memory supportDDR5-5200BetterDDR4-3200
Cores / Threads6 / 1212 / 24Better
SocketAM5BetterAM4
ArchitectureRaphaelMatisse
Clock speed3,8 - 5,1 GHz3,8 - 4,6 GHz
Base clock3800 MHz3800 MHz
Boost clock5100 MHzBetter4600 MHz
L1 cache384 KB768 KBBetter
L2 cache6 MB6 MB
L3 cache32 MB64 MBBetter
HEAD TO HEAD · CALCULATED INDEX
H2H workload indices
Comparable internal indices on a fixed 0–100 scale.
The Benchmarks section compares Ryzen 5 PRO 7645 and Ryzen 9 3900X with normalized H2H data, turning specifications, tests and value signals into practical buying context.
H2H Single-core IndexH2H Index / 100857710%
H2H Multi-core IndexH2H Index / 100315657%
H2H Productivity IndexH2H Index / 100435423%
H2H Rendering IndexH2H Index / 100254557%
H2H Value IndexH2H Index / 100000%
These are versioned H2H calculated indices derived from normalized catalog data. They are not results from a third-party benchmark.
HEAD TO HEAD · CALCULATED INDEX
H2H AI workload indices
Estimated workload profiles based on available performance and memory data.
The Detailed comparison section compares Ryzen 5 PRO 7645 and Ryzen 9 3900X with normalized H2H data, turning specifications, tests and value signals into practical buying context.
H2H ML Preprocessing IndexH2H Index / 100131514%
H2H CPU Inference IndexH2H Index / 100141719%
H2H Local LLM CPU IndexH2H Index / 100111317%
H2H Data Pipeline IndexH2H Index / 100151713%
H2H Computer Vision CPU IndexH2H Index / 100141613%
These are versioned H2H calculated indices derived from normalized catalog data. They are not results from a third-party benchmark.
AI EXPLAIN · HEAD TO HEAD
Explain this comparison
Beyond percentages: causes, relevant specifications, and practical impact behind every chart.
What AI will explain
Overall score, radar, FPS, synthetic tests, specifications, efficiency, and value.
REAL CONFIGURATIONS
Owner experiences
Real builds, results, and community feedback.
♢Moderator reviewed☆Helpful to the community🏅Expert badges
Frequently asked comparison questions
Short recommendations based on performance, memory, power consumption, and intended use.
01Which is better for gaming: Ryzen 5 PRO 7645 or Ryzen 9 3900X?+
Ryzen 5 PRO 7645 has the higher overall gaming score, while Ryzen 5 PRO 7645 offers the better price-to-performance ratio. The final choice depends on resolution and settings.
02Which is better for streaming?+
Ryzen 5 PRO 7645 is the stronger streaming choice thanks to performance, hardware encoding, and application support. Check AV1, H.264, and HEVC support before buying.
03Which is better for Blender?+
Ryzen 5 PRO 7645 is generally the better option for Blender and GPU rendering. Rendering-engine support and available VRAM also matter.
04Which is better for video editing?+
Ryzen 5 PRO 7645 offers more overall performance, while Ryzen 5 PRO 7645 offers more memory headroom. Codecs, hardware encoders, and editor optimization can change the result.
05Which is better for neural networks and AI?+
Ryzen 5 PRO 7645 is the more practical option for local AI workloads. VRAM capacity, compute libraries, and framework compatibility are especially important.
06Which is better for 1080p?+
Ryzen 5 PRO 7645 is the most rational 1080p choice, where high frame rates and cost per frame matter most.
07Which is better for 1440p?+
Ryzen 5 PRO 7645 leads in combined 1440p performance. Ryzen 5 PRO 7645 can be preferable for heavy textures and games with high VRAM usage.
08Which is better for 4K?+
Ryzen 5 PRO 7645 is preferable for 4K, where total performance, memory bandwidth, and VRAM capacity have the greatest impact.
09Which is better for a quiet PC?+
Ryzen 5 PRO 7645 is easier to use in a quiet build because of its lower estimated power and thermal load. Actual noise depends on the specific cooler.
10Which is better without replacing the power supply?+
Ryzen 5 PRO 7645 is the safer candidate because its stated power consumption is lower. Verify PSU wattage, age, and power connectors.
11Is it worth upgrading from the previous generation?+
Consider upgrading to Ryzen 5 PRO 7645 if your current device no longer delivers the required FPS, memory capacity, or feature support. A gain below 15–20% is usually worth waiting for a price cut.