AMD Ryzen Threadripper 3990X vs Intel Core i3-12100 Comparison

Head-to-Head Benchmarks

The recorded data presents a stark contrast between the AMD Ryzen Threadripper 3990X and the Intel Core i3-12100. Across 14 head-to-head benchmark comparisons, the Threadripper 3990X claims victory in 10 tests, while the Core i3-12100 wins 4. The margin of victory, however, tells a more nuanced story than the win count alone.

The Threadripper 3990X delivers its most emphatic results in multi-threaded workloads. In 3DMark Max Threads, the AMD processor scores 18,441 against Intel's 4,004, a staggering 360.6% advantage. Cinebench tests reinforce this dominance with remarkable consistency: the R15 multicore test shows 6,866 versus 1,070 (a 541.7% delta), R20 multicore shows 28,612 versus 4,461 (541.4%), and R23 multicore shows 68,124 versus 10,623 (541.3%). Even the single-core Cinebench results, which typically favor Intel architectures, go to the Threadripper: R15 single-core scores 969 versus 150 (546% delta), R20 single-core scores 4,039 versus 629 (542.1%), and R23 single-core scores 9,617 versus 1,499 (541.6%). These Cinebench single-core deltas are outliers compared to other single-threaded tests, suggesting the benchmark methodology captures something distinct about the AMD processor's execution.

Geekbench multicore adds another data point for the Threadripper: 20,912 versus 7,214, a 189.9% advantage. The 3DMark 8-thread test also favors AMD at 5,182 versus 4,014, a 29.1% delta.

The Intel Core i3-12100 counters in low-thread-count scenarios. 3DMark 2 threads shows Intel ahead at 1,645 versus 1,383, a 15.9% advantage. The 4-thread test is closer: 2,845 versus 2,721, a 4.4% lead for Intel. The single-thread 3DMark test gives Intel 890 against 695, a 21.9% delta. Geekbench single-core shows Intel at 1,962 versus 1,472, a 25% advantage.

Where Each One Wins

The benchmark splits align with thread utilization. The Threadripper 3990X wins decisively in scenarios that scale with core count: 3DMark Max Threads, Cinebench multicore across all three versions, Geekbench multicore, and 3DMark 16 threads. Its 64 cores and 128 threads provide massive parallelism for rendering, scientific computing, and content creation workloads that can utilize every available thread.

The Core i3-12100 wins in lightly threaded tasks. Its 4 cores and 8 threads deliver superior per-thread performance in 3DMark 2-thread and 4-thread tests, plus the single-thread 3DMark and Geekbench tests. These results suggest the Intel processor excels in everyday computing, legacy applications, and tasks where single-core speed matters more than raw throughput.

The 3DMark 8-thread result is a middle ground: the Threadripper wins with 5,182 versus 4,014, indicating that even at moderate thread counts, the AMD processor's additional cores provide measurable benefits. This pattern implies that workloads using 8 or more threads will generally favor the Threadripper, while anything at 4 threads or fewer tends to favor the Core i3.

Architecture Differences

The two processors represent fundamentally different design philosophies. The AMD Ryzen Threadripper 3990X belongs to the 3000 series and uses the Zen 2 architecture under the codename Castle Peak. It is built on a 7 nm process at TSMC and packs 30,400 million transistors across a die size of 8x 74 mm². The Intel Core i3-12100 uses the Alder Lake architecture under the codename Alder Lake-S, fabricated on Intel's 10 nm process with a die size of 163 mm².

Cache configuration differs substantially. The Threadripper allocates 64 KB of L1 cache per core and 512 KB of L2 per core, with a massive 256 MB of L3 cache. The Core i3-12100 provides 80 KB of L1 per core and 1.25 MB of L2 per core, but only 12 MB of shared L3 cache. The Threadripper's L3 cache is 21 times larger, which benefits data-heavy workloads that repeatedly access large datasets.

Memory support diverges as well. The Threadripper uses quad-channel DDR4 with a memory bandwidth of 102.4 GB/s. The Core i3-12100 supports both DDR4 and DDR5 through a dual-channel interface, though the database does not record a specific bandwidth figure for it. PCIe connectivity also differs: the Threadripper offers Gen 4 with 64 lanes from the CPU, while the Core i3 provides Gen 5 with 16 lanes.

The Threadripper features an unlocked multiplier for overclocking, while the Core i3 does not. Intel's processor includes integrated UHD Graphics 730, whereas the AMD chip has no integrated graphics. Both processors lack ECC memory support.

Specification Differences

The core and thread counts represent the most dramatic divergence: 64 cores and 128 threads for the Threadripper versus 4 cores and 8 threads for the Core i3. Base clocks differ, with the Threadripper at 2.90 GHz and the Core i3 at 3.30 GHz, though both reach the same 4.30 GHz boost clock. Thermal design power reflects the scale difference: 280 watts for the AMD processor versus 60 watts for Intel.

Socket compatibility separates the platforms entirely. The Threadripper uses AMD Socket TRX4, while the Core i3 uses Intel Socket 1700. The Threadripper's process node is 7 nm from TSMC, compared to Intel's 10 nm process. The AMD chip launched on February 6, 2020 with a launch MSRP of $3990, while the Intel chip launched on January 3, 2022 with a launch MSRP of $122. The Threadripper's part number is 100-000000163100-100000163WOF; the Core i3's part number is SRL62.

FAQ

Q: Which processor has more cores and threads?

A: The AMD Ryzen Threadripper 3990X has 64 cores and 128 threads. The Intel Core i3-12100 has 4 cores and 8 threads.

Q: Which processor wins in single-threaded benchmarks?

A: The Intel Core i3-12100 wins the 3DMark single-thread test (890 versus 695) and Geekbench single-core (1,962 versus 1,472). However, the Threadripper wins all Cinebench single-core tests, including R23 with 9,617 versus 1,499.

Q: What is the largest benchmark margin between the two?

A: The 3DMark Max Threads test shows the largest delta at 360.6%, with the Threadripper scoring 18,441 against the Core i3's 4,004. Several Cinebench multicore tests show even larger percentage deltas around 541%, but those are based on the specific scoring scale of each test.

Q: Do both processors support ECC memory?

A: No. The database records ECC memory support as false for both the AMD Ryzen Threadripper 3990X and the Intel Core i3-12100.

Q: Which processor has integrated graphics?

A: Only the Intel Core i3-12100 includes integrated UHD Graphics 730. The AMD Ryzen Threadripper 3990X has no integrated graphics.

Q: How do the two compare in the database's overall percentile ranking?

A: The Threadripper 3990X ranks at the 68th percentile among all CPUs, while the Core i3-12100 ranks at the 67th percentile. Their average benchmark scores are 12,786 and 12,054 respectively, placing them near each other in the overall distribution despite their very different workload profiles.

The Verdict

The data paints a clear picture of two processors built for different purposes. The AMD Ryzen Threadripper 3990X excels in heavily threaded environments: its 64 cores and 128 threads deliver over 500% higher Cinebench multicore scores and a 360.6% advantage in 3DMark Max Threads. The 256 MB L3 cache and quad-channel memory with 102.4 GB/s bandwidth further support large-scale parallel workloads. This processor belongs in systems where rendering, simulation, or data processing demands maximum parallel throughput.

The Intel Core i3-12100 wins in light-thread scenarios with its 4.30 GHz boost clock and superior per-core efficiency. Its 3DMark 2-thread and 4-thread victories, plus Geekbench single-core leadership, make it suited for responsive everyday computing, older applications, and tasks that rely on single-core performance. The integrated graphics and lower 60-watt TDP also position it for more modest system builds.

The database's overall percentile rankings place both processors within one point of each other (68th versus 67th), and their average benchmark scores differ by only 5.7% (12,786 versus 12,054). This near-parity in aggregate metrics obscures the extreme divergence in workload-specific results. The Threadripper dominates multi-threaded tests by margins exceeding 500%, while the Core i3 wins single-threaded tests by 15% to 25%. The 3DMark 8-thread test, which the Threadripper wins by 29.1%, marks the threshold where the AMD processor's core count begins to overcome the Intel chip's per-thread advantage.

Buyers should choose based on workload, not aggregate scores. The Threadripper 3990X is the clear choice for multi-threaded rendering and compute tasks, while the Core i3-12100 handles light-thread workloads with superior efficiency and lower power draw. The data offers no single winner, only a clear separation of strengths.