AMD Ryzen 3 3100U vs AMD Ryzen 7 5800XT Comparison

The AMD Ryzen 3 3100U and AMD Ryzen 7 5800XT occupy opposite ends of AMD’s performance spectrum, and the benchmark data reflects a decisive separation. The Ryzen 3 3100U is a 2-core, 2-thread mobile processor built for low-power efficiency, while the Ryzen 7 5800XT is an 8-core, 16-thread desktop chip designed for heavy multi-threaded workloads. In every head-to-head benchmark recorded in the database, the Ryzen 7 5800XT wins, delivering an average benchmark score of 29,879 compared to the Ryzen 3 3100U’s 6,247. The gap is not marginal; it is a structural advantage rooted in core count, architecture, and process technology. The data suggests that the Ryzen 3 3100U is suited for basic computing tasks where power draw is critical, while the Ryzen 7 5800XT is for users who need maximum throughput and responsiveness. No benchmark shows the Ryzen 3 3100U ahead, making the choice clear: the 5800XT is the superior processor in raw performance, while the 3100U serves a different, more efficiency-focused segment.

The Verdict

The recorded data leaves no ambiguity: the AMD Ryzen 7 5800XT outperforms the AMD Ryzen 3 3100U in all 11 head-to-head benchmarks. The Ryzen 7 5800XT posts a multithread score of 28,053 against the Ryzen 3 3100U’s 3,348, an 88.1% delta. Single-thread performance also favors the 5800XT, with a score of 3,535 versus 1,592, a 55% delta. The 5800XT’s average benchmark score of 29,879 places it in the 81st percentile of all CPUs, while the 3100U’s 6,247 average sits in the 62nd percentile. The 5800XT’s nearest rivals include the AMD Ryzen 7 7840H (0% delta) and the AMD Ryzen 5 9600X (0.6% delta), showing it is competitive with modern mid-range chips. The 3100U, by contrast, is near the AMD Ryzen Threadripper 1950X (0.3% delta) and Intel Core i9-10920X (-1.6% delta), which are far older and more power-hungry parts. For any workload where performance matters, the 5800XT is the only choice. The 3100U is for devices where the 15W TDP and integrated Radeon Vega 8 graphics are more important than raw compute. The verdict is straightforward: the Ryzen 7 5800XT is the performance leader, and the Ryzen 3 3100U is a low-power alternative that sacrifices speed for efficiency.

Architecture Differences

The two processors come from different eras and design philosophies. The Ryzen 3 3100U uses the Picasso codename, built on a 12nm process from GlobalFoundries, with a die size of 210 mm² and 4,940 million transistors. It is based on the Zen+ architecture, which was a refinement of the first-generation Zen design. The Ryzen 7 5800XT uses the Vermeer codename, built on a 7nm process from TSMC, with a much smaller die size of 74 mm² and 4,150 million transistors. It uses the Zen 3 architecture, which introduced a unified 8-core complex with direct access to L3 cache. The 5800XT has 32 MB of shared L3 cache, while the 3100U has only 4 MB. Per-core L1 cache is 64 KB on the 5800XT versus 96 KB on the 3100U, but the 5800XT’s larger L3 and newer process more than compensate. The 3100U has a 15W TDP and integrates Radeon Vega 8 graphics, while the 5800XT has a 105W TDP and no integrated graphics. The 5800XT supports ECC memory, the 3100U does not. The 5800XT runs on Socket AM4 with PCIe Gen 4 (20 lanes), while the 3100U uses Socket FP5 with PCIe Gen 3. The process node difference (7nm versus 12nm) explains the 5800XT’s ability to pack 8 cores into a smaller die while running at higher clocks. The 3100U’s 2 cores and 2 threads with a 1.90 GHz base clock and 3.20 GHz boost clock are a fraction of the 5800XT’s 8 cores, 16 threads, 3.80 GHz base, and 4.80 GHz boost. The release dates also differ: the 3100U launched in 2026, while the 5800XT launched in 2024, but the 5800XT’s newer architecture still dominates.

Head-to-Head Benchmarks

The head-to-head data shows the Ryzen 7 5800XT winning every recorded test, with deltas ranging from -55% to -91.3%. The largest margin is in extended instructions, where the 5800XT scores 24,270 versus the 3100U’s 2,116, a -91.3% delta. Data encryption follows closely: 21,461 versus 1,972, a -90.8% delta. Integer math shows the 5800XT at 93,942 versus 8,873, a -90.6% delta. Floating-point math is 53,808 versus 5,854, a -89.1% delta, identical to the data compression delta of -89.1% (352,002 versus 38,455). Multithread performance is 28,053 versus 3,348, an -88.1% delta, and random string sorting is 35,911 versus 4,666, a -87% delta. Prime number finding shows 119 versus 18, a -84.9% delta, and physics is 1,355 versus 232, a -82.9% delta. The smallest margin is in single-thread tests, where the 5800XT scores 3,535 versus 1,592, a -55% delta. This pattern indicates that the 5800XT’s advantage grows with core count and complex instruction sets. The 3100U’s 2 cores cannot compete in parallel workloads, and even in single-threaded tasks, the 5800XT’s higher clock speed and Zen 3 architecture provide a 2.2x lead. The data also shows the 5800XT’s 3DMark scores: 7,683 in 16-thread, 6,141 in 8-thread, 3,603 in 4-thread, 1,879 in 2-thread, and 959 in single-thread. Cinebench R23 scores are 23,794 multi-core and 3,359 single-core. These figures are absent for the 3100U, which only has PassMark data, but the PassMark results alone tell the same story.

Specification Differences

The two CPUs differ in nearly every measurable specification. The Ryzen 3 3100U has 2 cores and 2 threads, while the Ryzen 7 5800XT has 8 cores and 16 threads. Base clock is 1.90 GHz versus 3.80 GHz, and boost clock is 3.20 GHz versus 4.80 GHz. TDP is 15W versus 105W. The 3100U uses Socket FP5, the 5800XT uses Socket AM4. Process node is 12nm (GlobalFoundries) versus 7nm (TSMC). Transistor count is 4,940 million versus 4,150 million, and die size is 210 mm² versus 74 mm². L1 cache is 96 KB per core versus 64 KB per core, L2 cache is identical at 512 KB per core, and L3 cache is 4 MB shared versus 32 MB shared. Memory support is DDR4 for both, with dual-channel buses, but memory bandwidth is 38.4 GB/s versus 51.2 GB/s. ECC memory is not supported on the 3100U but is supported on the 5800XT. PCIe is Gen 3 on the 3100U versus Gen 4 with 20 lanes on the 5800XT. Integrated graphics are Radeon Vega 8 on the 3100U and N/A on the 5800XT. The 3100U is a mobile segment part, the 5800XT is desktop. The 5800XT has an unlocked multiplier, the 3100U does not. The 5800XT has a launch MSRP of $249, while the 3100U has no recorded launch MSRP. Release dates are 2026-05-31 for the 3100U and 2024-07-30 for the 5800XT. The 5800XT’s part number is 100-000001582, and the 3100U’s is YM3100C4T2OFG. These differences explain the performance gap: more cores, higher clocks, more cache, and a newer process all favor the 5800XT.

FAQ

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

A: The AMD Ryzen 7 5800XT scores 3,535 in the PassMark single-thread test, while the AMD Ryzen 3 3100U scores 1,592. The delta is -55%, meaning the 5800XT is approximately 2.2x faster.

Q: How do the two compare in multithread performance?

A: The 5800XT scores 28,053 in PassMark multithread, versus 3,348 for the 3100U, a -88.1% delta. The 8-core, 16-thread design of the 5800XT gives it a massive advantage.

Q: Do both processors support ECC memory?

A: No. The Ryzen 7 5800XT supports ECC memory, while the Ryzen 3 3100U does not.

Q: What is the L3 cache size difference?

A: The Ryzen 7 5800XT has 32 MB of shared L3 cache, while the Ryzen 3 3100U has 4 MB. This is an 8x difference.

Q: Which processor has integrated graphics?

A: The Ryzen 3 3100U includes Radeon Vega 8 integrated graphics. The Ryzen 7 5800XT has no integrated graphics, so it requires a discrete GPU.

Q: What is the TDP of each processor?

A: The Ryzen 3 3100U has a TDP of 15W, making it suitable for mobile devices. The Ryzen 7 5800XT has a TDP of 105W, reflecting its higher performance envelope.

Where Each One Wins

The Ryzen 7 5800XT wins in every recorded benchmark, so the question is not where it wins, but where the Ryzen 3 3100U can be justified. The 3100U’s 15W TDP and integrated Radeon Vega 8 graphics make it the only option for fanless or battery-powered designs where power draw is the primary constraint. Its 2 cores and 2 threads are sufficient for light office work, web browsing, and media playback, but the data shows it trails the 5800XT by at least 55% even in single-threaded tasks. The 5800XT, with its 105W TDP, 8 cores, 16 threads, and 32 MB L3 cache, is designed for content creation, software compilation, and gaming, where the multithread scores of 28,053 and Cinebench R23 multi-core of 23,794 matter. The 5800XT’s support for ECC memory and PCIe Gen 4 also makes it suitable for workstation-class builds. The 3100U cannot be recommended for any task where performance is a priority, as its average benchmark score of 6,247 and 62nd percentile ranking place it near older high-end parts like the AMD Ryzen Threadripper 1950X (6,231) and Intel Core i9-10920X (6,347), which are far more capable in absolute terms. The 5800XT’s 81st percentile ranking and its proximity to the Ryzen 7 7840H and Ryzen 5 9600X show it is a current-generation performer. The data implies that the 3100U is a low-cost, low-power entry point, while the 5800XT is the high-performance choice for users who need the full capabilities of a modern desktop processor.