AMD Ryzen 3 3100U vs AMD Ryzen 5 7400F Comparison

The Verdict

The benchmark data presents an unambiguous hierarchy between these two AMD processors. The Ryzen 5 7400F wins every single recorded head-to-head comparison, taking 11 of 11 tests. The Ryzen 3 3100U trails by margins ranging from 56.8% to 90.6% depending on the workload. This is not a close contest by any metric in the database.

The Ryzen 5 7400F sits at the 83rd percentile of all CPUs tracked, with an average benchmark score of 32,750. The Ryzen 3 3100U lands at the 62nd percentile with an average of 6,247. The 7400F's nearest rivals in the database are the Intel Core i5-14600T (0.1% ahead), Intel Core Ultra 7 155H (0.2% ahead), AMD Ryzen 7 PRO 6850H (0.2% behind), and AMD Ryzen AI 7 PRO 360 (0.3% ahead). The 3100U's nearest rivals are the AMD Ryzen Threadripper 1950X (0.3% ahead), AMD EPYC 7272 (1% ahead), Intel Core i9-10920X (1.6% behind), and Intel Core i9-7940X (1.6% ahead).

For a user selecting between these two, the data points clearly toward the 7400F for any compute-heavy task. The 3100U, with its mobile segment design and integrated graphics, serves a fundamentally different purpose. The 7400F is a desktop processor with no integrated graphics, while the 3100U is a mobile part. The choice hinges on the platform: a laptop or compact mobile system versus a desktop build. The 7400F's launch MSRP is $229, but the database shows no price for the 3100U.

Architecture Differences

The two processors come from different eras and design philosophies. The Ryzen 3 3100U belongs to the 3000 series, built on the Picasso codename using the Zen+ architecture. Its process node is 12 nm, fabricated by GlobalFoundries, with a transistor count of 4,940 million and a die size of 210 mm². The Ryzen 5 7400F is part of the 7000 series, with the Raphael codename and the Zen 4 architecture. It uses a 5 nm process from TSMC, packs 6,570 million transistors into a 71 mm² die.

The core configurations differ substantially. The 3100U has 2 cores and 2 threads, while the 7400F doubles to 6 cores and 12 threads. Cache hierarchies also diverge: the 3100U provides 96 KB of L1 per core, 512 KB of L2 per core, and 4 MB of shared L3 cache. The 7400F offers 64 KB of L1 per core, 1 MB of L2 per core, and a much larger 32 MB of shared L3. The smaller L1 per core on the 7400F is offset by the larger L2 and the eightfold increase in L3 capacity.

Memory support marks another generational split. The 3100U uses DDR4 with dual-channel access and a memory bandwidth of 38.4 GB/s. The 7400F uses DDR5 with dual-channel access and 83.2 GB/s of bandwidth. ECC memory is not supported on the 3100U but is enabled on the 7400F. PCIe generations also differ: the 3100U has Gen 3, while the 7400F has Gen 5 with 24 lanes (CPU only).

Socket compatibility reinforces the divide. The 3100U uses AMD Socket FP5, a mobile platform, while the 7400F uses AMD Socket AM5 for desktop builds. The 3100U includes integrated Radeon Vega 8 graphics; the 7400F has no integrated graphics at all. Clock speeds reflect the power envelopes: the 3100U runs at 1.90 GHz base and 3.20 GHz boost with a 15 W TDP, while the 7400F runs at 3.70 GHz base and 4.70 GHz boost with a 65 W TDP. The 7400F also has an unlocked multiplier, which the 3100U does not.

FAQ

Q: Which processor has a higher single-thread score?

A: The Ryzen 5 7400F records a single-thread score of 3,689, which is 56.8% higher than the Ryzen 3 3100U's 1,592. The same delta applies to the duplicate singlethread test in the database.

Q: How large is the gap in multithreaded performance?

A: The 7400F scores 25,645 in the PassMark multithread test, compared to the 3100U's 3,348. That is a delta of 86.9%, meaning the 7400F delivers roughly 7.7 times the multithreaded score.

Q: Does the Ryzen 3 3100U support ECC memory?

A: No. The database lists ECC memory support as false for the 3100U. The Ryzen 5 7400F supports ECC memory.

Q: What is the memory bandwidth difference?

A: The 3100U has a memory bandwidth of 38.4 GB/s with DDR4 support. The 7400F has 83.2 GB/s with DDR5 support, more than double the bandwidth.

Q: Which processor includes integrated graphics?

A: The Ryzen 3 3100U includes Radeon Vega 8 integrated graphics. The Ryzen 5 7400F has no integrated graphics (listed as N/A), so a discrete GPU is required for display output.

Q: How do the two processors compare in the find prime numbers test?

A: The 7400F scores 191, while the 3100U scores 18, a delta of 90.6%. This is the largest percentage gap among all recorded head-to-head tests.

Specification Differences

The two processors differ across nearly every specification field in the database.

• Series: 3000 series (3100U) versus 7000 series (7400F)
• Cores: 2 (3100U) versus 6 (7400F)
• Threads: 2 (3100U) versus 12 (7400F)
• Base clock: 1.90 GHz (3100U) versus 3.70 GHz (7400F)
• Boost clock: 3.20 GHz (3100U) versus 4.70 GHz (7400F)
• TDP: 15 W (3100U) versus 65 W (7400F)
• Socket: AMD Socket FP5 (3100U) versus AMD Socket AM5 (7400F)
• Architecture: Zen+ (3100U) versus Zen 4 (7400F)
• Codename: Picasso (3100U) versus Raphael (7400F)
• Process node: 12 nm (3100U) versus 5 nm (7400F)
• Foundry: GlobalFoundries (3100U) versus TSMC (7400F)
• Transistors: 4,940 million (3100U) versus 6,570 million (7400F)
• Die size: 210 mm² (3100U) versus 71 mm² (7400F)
• L1 cache per core: 96 KB (3100U) versus 64 KB (7400F)
• L2 cache per core: 512 KB (3100U) versus 1 MB (7400F)
• L3 cache shared: 4 MB (3100U) versus 32 MB (7400F)
• Memory support: DDR4 (3100U) versus DDR5 (7400F)
• Memory bandwidth: 38.4 GB/s (3100U) versus 83.2 GB/s (7400F)
• ECC memory: false (3100U) versus true (7400F)
• PCIe: Gen 3 (3100U) versus Gen 5, 24 Lanes CPU only (7400F)
• Integrated graphics: Radeon Vega 8 (3100U) versus N/A (7400F)
• Market segment: Mobile (3100U) versus Desktop (7400F)
• Release date: 2026-05-31 (3100U) versus 2025-01-08 (7400F)
• Multiplier unlocked: false (3100U) versus true (7400F)
• Part number: YM3100C4T2OFG (3100U) versus 100-000001845 (7400F)

Head-to-Head Benchmarks

The head-to-head results show a consistent pattern. The Ryzen 5 7400F wins all 11 recorded tests, with the smallest delta in single-thread workloads and the largest in prime number calculations.

The single-thread test shows the closest relative performance. The 7400F scores 3,689 against the 3100U's 1,592, a delta of 56.8%. This is still a decisive win, but it indicates that per-core performance differences, while large, are less extreme than the multithreaded gaps. The duplicate singlethread test confirms the same numbers.

The data compression test gives the 7400F a score of 289,999 versus 38,455, a delta of 86.7%. The data encryption test shows 16,712 versus 1,972, a delta of 88.2%. Extended instructions deliver 21,747 versus 2,116, a delta of 90.3%. Floating point math scores 45,799 versus 5,854, a delta of 87.2%. Integer math scores 74,745 versus 8,873, a delta of 88.1%.

The multithread test records 25,645 for the 7400F and 3,348 for the 3100U, a delta of 86.9%. Physics simulation scores 1,660 versus 232, a delta of 86%. Random string sorting yields 35,096 versus 4,666, a delta of 86.7%. The find prime numbers test shows the largest gap: 191 versus 18, a delta of 90.6%.

No test in the database favors the Ryzen 3 3100U. The wins count stands at 0 for the 3100U and 11 for the 7400F. The average benchmark scores reinforce this: 6,247 for the 3100U versus 32,750 for the 7400F, a roughly 5.2-fold difference.

Where Each One Wins

The Ryzen 5 7400F wins every workload category recorded in the database. The data shows no scenario where the 3100U outperforms it. However, the use cases differ based on platform constraints rather than benchmark scores.

The 7400F is the clear choice for desktop computing where performance matters. Its 6 cores and 12 threads, combined with the larger 32 MB L3 cache and DDR5 bandwidth of 83.2 GB/s, deliver superior results in compression, encryption, math operations, and multithreaded tasks. The unlocked multiplier allows overclocking, and the ECC memory support suits error-sensitive workloads. The desktop segment and AM5 socket require a discrete GPU, but the benchmark data justifies that investment for compute-heavy applications.

The 3100U serves the mobile segment with its FP5 socket and 15 W TDP. It includes Radeon Vega 8 integrated graphics, which means a system built around it needs no separate GPU for basic display. Its lower power draw and mobile design make it suitable for portable systems where battery life and heat dissipation matter more than raw throughput. The 2-core, 2-thread configuration and 4 MB L3 cache limit its performance, but the integrated graphics provide a complete package for lightweight tasks.

The percentile rankings frame the broader context. The 7400F at the 83rd percentile sits among mid-range desktop processors, while the 3100U at the 62nd percentile occupies a lower tier. The nearest rivals for the 7400F are all recent mid-range parts within 0.3% of its average score. The 3100U's nearest rivals include high-core-count workstation and server chips from earlier generations, which reflects its position as a low-power mobile part rather than a performance contender.

For users constrained to a mobile platform, the 3100U is the only option of the two. For desktop builders, the 7400F's benchmark dominance makes it the obvious selection based on recorded data. The release dates differ by roughly 16 months, with the 3100U releasing on 2026-05-31 and the 7400F on 2025-01-08, but the performance gap is not a matter of release timing; it is a fundamental architectural and configurational difference.