AMD Ryzen 3 3100U vs Intel Core i9-12900E Comparison

Head-to-Head Benchmarks

The recorded data shows no direct head-to-head benchmark suite for these two processors, so the comparison must be assembled from their respective individual benchmark profiles. The AMD Ryzen 3 3100U and the Intel Core i9-12900E sit in entirely different performance strata, and the numbers make that gap explicit.

In single-threaded work, the Intel part is decisively ahead. Geekbench single-core scores show the i9-12900E at 1775, while the Ryzen 3 3100U posts 1592 on PassMark single-thread. That is a difference of roughly 11.5% in favor of Intel. Cinebench R23 single-core reinforces this: the i9-12900E scores 3321, a figure the Ryzen cannot approach because it lacks any Cinebench entries in the database. The PassMark data compression test is a bright spot for AMD, with the Ryzen 3 3100U scoring 38455, a strong result that eclipses what the Intel chip would likely manage, though no direct compression score exists for the i9-12900E in the pack.

The multi-threaded gap is far more dramatic. The i9-12900E delivers 23529 in Cinebench R23 multicore, 9882 in R20 multicore, and 10280 in Geekbench multicore. The Ryzen 3 3100U counters with a PassMark multithread score of 3348. When placed side by side, the Intel processor is roughly seven times faster in multi-threaded throughput, a chasm that reflects core count and clock speed differences. The Ryzen 3 3100U does manage a respectable PassMark integer math score of 8873 and floating point math of 5854, but these do little to close the overall gap.

The average benchmark scores in the database tell a similar story. The i9-12900E averages 6611, while the Ryzen 3 3100U averages 6247. That is a 5.8% advantage for Intel in aggregate, though the percentile rankings are identical: both sit at the 62nd percentile of all CPUs. This is a curious statistical artifact, the two chips land in the same percentile band despite vastly different workloads and target markets. The nearest rivals for each chip underscore the positioning. The Ryzen 3 3100U sits within 1.6% of the Intel Core i9-7940X and 1% of the AMD EPYC 7272, a group of high-end desktop and server parts. The i9-12900E, by contrast, is within 0.4% of the Intel Core i5-13500E and 0.4% of the Intel Core i5-13400E, suggesting it behaves like a midrange desktop part in aggregate scoring despite its i9 branding.

Architecture Differences

The two processors come from divergent design philosophies and process nodes. The AMD Ryzen 3 3100U is built on a 12 nm process at GlobalFoundries, using the Picasso codename and Zen+ architecture. It packs just 2 cores and 2 threads, a dual-core configuration with no simultaneous multithreading. The Intel Core i9-12900E uses a 10 nm process at Intel, carries the Alder Lake-S codename and Alder Lake architecture, and scales to 16 cores and 24 threads, a hybrid arrangement that the database records without specifying performance and efficiency core split.

Cache hierarchies differ sharply. The Ryzen 3 3100U has 96 KB of L1 per core, 512 KB of L2 per core, and 4 MB of shared L3. The i9-12900E has 80 KB of L1 per core, 1.25 MB of L2 per core, and 30 MB of shared L3. The Intel chip offers over seven times the L3 capacity, a massive advantage for data-heavy workloads. Transistor counts also diverge: AMD lists 4,940 million transistors on a 210 mm² die, while Intel does not report a transistor count but shows a 215 mm² die, making the two silicon areas nearly identical despite the process node difference.

Memory support splits the pair. The Ryzen 3 3100U supports DDR4 only, dual-channel, with a memory bandwidth of 38.4 GB/s. The i9-12900E supports both DDR4 and DDR5, also dual-channel, though the database does not list a bandwidth figure for Intel. ECC memory is unsupported on both. PCIe generations differ: AMD uses Gen 3, while Intel uses Gen 5 with 20 lanes on the CPU. Integrated graphics also differ, the Ryzen 3 3100U carries Radeon Vega 8, while the i9-12900E has UHD Graphics 770.

The socket and market segment are polar opposites. AMD uses Socket FP5 and targets mobile devices. Intel uses Socket 1700 and targets desktop. The Ryzen 3 3100U has a locked multiplier, while the i9-12900E is multiplier-unlocked, allowing overclocking. The Intel part also has a launch MSRP of $494, while the AMD chip has no recorded launch price.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core i9-12900E has 16 cores and 24 threads. The AMD Ryzen 3 3100U has 2 cores and 2 threads, a fourfold difference in core count and a twelvefold difference in thread count.

Q: How do their single-threaded scores compare?

A: The i9-12900E scores 1775 in Geekbench single-core and 3321 in Cinebench R23 single-core. The Ryzen 3 3100U scores 1592 in PassMark single-thread. The Intel chip leads by roughly 11.5% on the Geekbench versus PassMark comparison, though the tests differ.

Q: What is the average benchmark score for each?

A: The i9-12900E averages 6611, while the Ryzen 3 3100U averages 6247. Both sit at the 62nd percentile of all CPUs in the database.

Q: Do both processors support ECC memory?

A: No. Neither the AMD Ryzen 3 3100U nor the Intel Core i9-12900E supports ECC memory.

Q: What memory types does each support?

A: The Ryzen 3 3100U supports DDR4 only. The i9-12900E supports both DDR4 and DDR5. Both use dual-channel memory buses, with AMD recording 38.4 GB/s bandwidth.

Q: Are these processors unlocked for overclocking?

A: The Intel Core i9-12900E has an unlocked multiplier. The AMD Ryzen 3 3100U does not, its multiplier is locked.

Specification Differences

The two chips differ in nearly every measurable specification. The Ryzen 3 3100U uses AMD Socket FP5, the i9-12900E uses Intel Socket 1700. Core counts: 2 versus 16. Threads: 2 versus 24. Base clocks: 1.90 GHz versus 2.30 GHz. Boost clocks: 3.20 GHz versus 5.00 GHz. TDP: 15 watts versus 65 watts.

Process node: 12 nm for AMD, 10 nm for Intel. Foundry: GlobalFoundries for AMD, Intel for Intel. Die size: 210 mm² for AMD, 215 mm² for Intel. Transistors: 4,940 million for AMD, not reported for Intel. Cache: L1 is 96 KB per core on AMD versus 80 KB per core on Intel, L2 is 512 KB per core versus 1.25 MB per core, L3 is 4 MB shared versus 30 MB shared.

Memory: DDR4 only for AMD, DDR4 and DDR5 for Intel. Memory bandwidth: 38.4 GB/s for AMD, not reported for Intel. PCIe: Gen 3 for AMD, Gen 5 with 20 lanes for Intel. Integrated graphics: Radeon Vega 8 for AMD, UHD Graphics 770 for Intel. Market segment: mobile for AMD, desktop for Intel. Release dates: 2026-05-31 for AMD, 2022-01-03 for Intel. The Intel part has a launch MSRP of $494, the AMD part has none.

The Verdict

The data points to a clear split by workload and platform. The Intel Core i9-12900E is the overwhelming choice for multi-threaded performance, with a Cinebench R23 multicore score of 23529 against the Ryzen 3 3100U's PassMark multithread of 3348. The 16 cores, 24 threads, and 30 MB of L3 cache make it suitable for rendering, compilation, or any parallel task. The unlocked multiplier adds flexibility for users who want to push clocks beyond the 5.00 GHz boost.

The AMD Ryzen 3 3100U is a mobile part with a 15-watt TDP, designed for power efficiency rather than raw throughput. Its 2 cores and 4 MB L3 cache limit it to light workloads. The PassMark data compression score of 38455 is notable, suggesting the chip handles certain single-threaded data tasks well, but the overall picture is one of a low-power entry point.

The identical 62nd percentile ranking for both chips is a statistical curiosity. It implies that in the aggregate benchmark distribution, both land in the same middle band, despite the i9-12900E being a desktop powerhouse and the Ryzen 3 3100U being a mobile economy part. This likely reflects the different benchmark suites each chip was tested with, the Intel part uses Cinebench and Geekbench, while the AMD part uses PassMark tests.

Users should choose based on platform and power constraints. The i9-12900E is for desktop systems requiring high multi-core throughput. The Ryzen 3 3100U is for mobile devices where a 15-watt TDP and integrated Vega 8 graphics matter more than core count.

Where Each One Wins

The Intel Core i9-12900E wins decisively in multi-threaded workloads. Its Cinebench R23 multicore score of 23529 dwarfs the Ryzen 3 3100U's multithread result by a factor of seven. The 30 MB shared L3 cache and 24 threads give it a massive edge in rendering, video encoding, and scientific computing. Its Geekbench multicore score of 10280 further confirms this dominance. The 5.00 GHz boost clock also gives it a single-thread advantage, with a Geekbench single-core score of 1775 and Cinebench R23 single-core of 3321.

The AMD Ryzen 3 3100U wins in power efficiency and specific single-threaded data tasks. Its 15-watt TDP is a fraction of the Intel chip's 65 watts, making it suitable for fanless or battery-powered designs. The PassMark data compression score of 38455 is a standout, indicating strong performance in compression algorithms. Its floating point math score of 5854 and integer math score of 8873 are respectable for a dual-core part, and the integrated Radeon Vega 8 graphics eliminate the need for a discrete GPU in basic systems.

The Ryzen 3 3100U also wins on platform simplicity. Its Socket FP5 and DDR4 support make it a drop-in solution for thin laptops, while its 38.4 GB/s memory bandwidth is adequate for its workload envelope. The Intel chip requires a Socket 1700 board and offers both DDR4 and DDR5, adding flexibility but also complexity.

The data does not support any scenario where the Ryzen 3 3100U outperforms the i9-12900E in raw compute. The only categories where AMD leads are the PassMark-specific tests like data compression, and even there the lack of a comparable Intel score makes the margin uncertain. The verdict is straightforward: the i9-12900E is for heavy desktop workloads, the Ryzen 3 3100U is for light mobile use.