AMD Ryzen 3 3100U vs AMD Ryzen 7 5705G Comparison

Head-to-Head Benchmarks

The recorded data does not include direct head-to-head benchmark comparisons between the AMD Ryzen 3 3100U and the AMD Ryzen 7 5705G. The head-to-head benchmark array is empty, and the win counts for both processors are zero. However, the Ryzen 3 3100U has a full set of PassMark benchmark scores, while the Ryzen 7 5705G has no benchmark entries in the database.

For the Ryzen 3 3100U, the available PassMark results show a single-thread score of 1592 and a multithread score of 3348. The processor achieves 8873 in integer math, 5854 in floating-point math, and 38455 in data compression. Data encryption scores 1972, extended instructions score 2116, and random string sorting reaches 4666. The find prime numbers test returns a score of 18, and the physics test scores 232. The average benchmark score for the Ryzen 3 3100U is 6247, placing it in the 62nd percentile among all CPUs in the database.

Because the Ryzen 7 5705G lacks recorded benchmark scores, the database cannot compute a direct comparison. The nearest rivals for the Ryzen 3 3100U provide context for its standing: the AMD Ryzen Threadripper 1950X averages 6231 (0.3% lower), the AMD EPYC 7272 averages 6186 (1.0% lower), the Intel Core i9-10920X averages 6347 (1.6% higher), and the Intel Core i9-7940X averages 6147 (1.6% lower). These deltas are small, indicating the Ryzen 3 3100U sits in a tightly clustered performance band despite its modest core count.

Architecture Differences

The two processors come from different generations and use different underlying designs. The Ryzen 3 3100U belongs to the 3000 series and is based on the Picasso architecture, which uses the Zen+ microarchitecture. Its generation is listed as Ryzen 3 (Zen+ (Picasso)). The Ryzen 7 5705G belongs to the 5000 series and is based on the Cezanne architecture, using the Zen 3 microarchitecture, listed as Ryzen 7 (Zen 3 (Cezanne)).

The manufacturing process differs significantly. The Ryzen 3 3100U is built on a 12 nm process at GlobalFoundries, with 4,940 million transistors on a 210 mm² die. The Ryzen 7 5705G uses a 7 nm process at TSMC, with 10,700 million transistors on a 180 mm² die. The smaller process node and higher transistor count allow the Ryzen 7 5705G to pack substantially more compute resources into a slightly smaller physical area.

Core and thread counts diverge sharply. The Ryzen 3 3100U has 2 cores and 2 threads, while the Ryzen 7 5705G has 8 cores and 16 threads. This is a 4x difference in cores and an 8x difference in threads. The Ryzen 3 3100U operates with a base clock of 1.90 GHz and a boost clock of 3.20 GHz. The Ryzen 7 5705G runs at a base clock of 3.80 GHz and boosts to 4.60 GHz, which represents substantially higher clock speeds at both ends.

Cache configurations also differ. The Ryzen 3 3100U has 96 KB of L1 cache per core, 512 KB of L2 cache per core, and 4 MB of shared L3 cache. The Ryzen 7 5705G has 64 KB of L1 cache per core, 512 KB of L2 cache per core, and 16 MB of L3 cache. The L3 cache difference is notable: the Ryzen 7 5705G offers four times the shared L3 capacity of the Ryzen 3 3100U.

Integrated graphics differ as well. The Ryzen 3 3100U uses Radeon Vega 8 graphics, while the Ryzen 7 5705G uses Radeon Graphics with 512 shader processors (listed as Radeon Graphics 512SP). The Ryzen 3 3100U is a mobile part with a 15 W TDP, while the Ryzen 7 5705G is a desktop part with a 65 W TDP. The Ryzen 3 3100U uses AMD Socket FP5, whereas the Ryzen 7 5705G uses AMD Socket AM4. The multiplier on the Ryzen 3 3100U is locked, while the Ryzen 7 5705G has an unlocked multiplier.

Both processors support DDR4 memory in dual-channel configuration. The Ryzen 3 3100U has a memory bandwidth of 38.4 GB/s, and the Ryzen 7 5705G has a memory bandwidth of 51.2 GB/s. Neither supports ECC memory. Both use PCIe Gen 3, though the Ryzen 7 5705G specifies 16 lanes for the CPU only, while the Ryzen 3 3100U does not list a lane count.

FAQ

Q: Which processor has more cores and threads?

A: The Ryzen 7 5705G has 8 cores and 16 threads. The Ryzen 3 3100U has 2 cores and 2 threads.

Q: What are the clock speed differences?

A: The Ryzen 3 3100U has a base clock of 1.90 GHz and a boost clock of 3.20 GHz. The Ryzen 7 5705G has a base clock of 3.80 GHz and a boost clock of 4.60 GHz.

Q: How does the cache compare between the two?

A: The Ryzen 3 3100U has 96 KB of L1 cache per core, 512 KB of L2 cache per core, and 4 MB of shared L3 cache. The Ryzen 7 5705G has 64 KB of L1 cache per core, 512 KB of L2 cache per core, and 16 MB of L3 cache.

Q: What are the TDP ratings?

A: The Ryzen 3 3100U is rated at 15 W TDP. The Ryzen 7 5705G is rated at 65 W TDP.

Q: Which processor uses a smaller manufacturing process?

A: The Ryzen 7 5705G uses a 7 nm process from TSMC. The Ryzen 3 3100U uses a 12 nm process from GlobalFoundries.

Q: Do both processors use the same memory type?

A: Both support DDR4 memory in dual-channel configuration. The Ryzen 3 3100U has a memory bandwidth of 38.4 GB/s, while the Ryzen 7 5705G has a memory bandwidth of 51.2 GB/s.

Specification Differences

The Ryzen 3 3100U and Ryzen 7 5705G differ across nearly every major specification field in the database.

• Series: 3000 series for the Ryzen 3 3100U; 5000 series for the Ryzen 7 5705G.
• Cores: 2 for the Ryzen 3 3100U; 8 for the Ryzen 7 5705G.
• Threads: 2 for the Ryzen 3 3100U; 16 for the Ryzen 7 5705G.
• Base clock: 1.90 GHz for the Ryzen 3 3100U; 3.80 GHz for the Ryzen 7 5705G.
• Boost clock: 3.20 GHz for the Ryzen 3 3100U; 4.60 GHz for the Ryzen 7 5705G.
• TDP: 15 W for the Ryzen 3 3100U; 65 W for the Ryzen 7 5705G.
• Socket: AMD Socket FP5 for the Ryzen 3 3100U; AMD Socket AM4 for the Ryzen 7 5705G.
• Architecture: Zen+ (Picasso) for the Ryzen 3 3100U; Zen 3 (Cezanne) for the Ryzen 7 5705G.
• Process node: 12 nm for the Ryzen 3 3100U; 7 nm for the Ryzen 7 5705G.
• Foundry: GlobalFoundries for the Ryzen 3 3100U; TSMC for the Ryzen 7 5705G.
• Transistors: 4,940 million for the Ryzen 3 3100U; 10,700 million for the Ryzen 7 5705G.
• Die size: 210 mm² for the Ryzen 3 3100U; 180 mm² for the Ryzen 7 5705G.
• L1 cache: 96 KB per core for the Ryzen 3 3100U; 64 KB per core for the Ryzen 7 5705G.
• L3 cache: 4 MB shared for the Ryzen 3 3100U; 16 MB for the Ryzen 7 5705G.
• Memory bandwidth: 38.4 GB/s for the Ryzen 3 3100U; 51.2 GB/s for the Ryzen 7 5705G.
• Integrated graphics: Radeon Vega 8 for the Ryzen 3 3100U; Radeon Graphics 512SP for the Ryzen 7 5705G.
• Market segment: Mobile for the Ryzen 3 3100U; Desktop for the Ryzen 7 5705G.
• Multiplier unlocked: No for the Ryzen 3 3100U; Yes for the Ryzen 7 5705G.
• Part number: YM3100C4T2OFG for the Ryzen 3 3100U; 100-000001800 for the Ryzen 7 5705G.

The two share identical L2 cache (512 KB per core), memory type (DDR4), memory bus (dual-channel), ECC support (none for both), and PCIe generation (Gen 3).

Where Each One Wins

The Ryzen 3 3100U has the advantage in power efficiency. Its 15 W TDP is dramatically lower than the 65 W TDP of the Ryzen 7 5705G. It also uses the FP5 socket, which is designed for mobile platforms, making it suitable for compact, low-power systems. The Ryzen 3 3100U has a recorded average benchmark score of 6247 and sits in the 62nd percentile among all CPUs, meaning it outperforms many processors despite having only 2 cores and 2 threads. Its 96 KB of L1 cache per core is larger than the 64 KB per core on the Ryzen 7 5705G, which can benefit certain latency-sensitive workloads.

The Ryzen 7 5705G wins on raw compute capacity. It offers 8 cores and 16 threads compared to 2 cores and 2 threads, along with substantially higher clock speeds (3.80 GHz base and 4.60 GHz boost versus 1.90 GHz and 3.20 GHz). It has four times the L3 cache (16 MB versus 4 MB), higher memory bandwidth (51.2 GB/s versus 38.4 GB/s), and a smaller 7 nm process node from TSMC. The unlocked multiplier allows user-controlled overclocking, which is not possible on the Ryzen 3 3100U. The Ryzen 7 5705G also carries 10,700 million transistors versus 4,940 million, and its Radeon Graphics 512SP integrated solution pairs with the newer Zen 3 architecture.

The Verdict

The recorded data supports a clear differentiation between these two processors. The Ryzen 3 3100U is a mobile-oriented, low-power part with a 15 W TDP, 2 cores, and 2 threads. Its benchmark scores, including a 1592 single-thread result and a 3348 multithread result, place it in the 62nd percentile of all CPUs. The Ryzen 7 5705G is a desktop-oriented part with a 65 W TDP, 8 cores, and 16 threads, built on a newer 7 nm process with a newer microarchitecture. It has no recorded benchmark scores in the database, so direct numeric comparison is unavailable.

The choice between them depends on the platform and workload. For a low-power mobile system where the FP5 socket and 15 W TDP are required, the Ryzen 3 3100U is the only viable option between the two. For a desktop system with AM4 socket support, the Ryzen 7 5705G provides more cores, more threads, higher clocks, more cache, and an unlocked multiplier. The benchmark data for the Ryzen 3 3100U shows it competes closely with much higher-end processors in the database, with nearest rivals like the Ryzen Threadripper 1950X and EPYC 7272 within roughly 1% of its average score. The Ryzen 7 5705G, with its 8-core, 16-thread configuration and Zen 3 architecture, is positioned for substantially heavier multi-threaded workloads, though its lack of recorded benchmark scores prevents a quantified confirmation in this database.