AMD Ryzen Threadripper 1900X vs Intel Core i5-12400T Comparison

The AMD Ryzen Threadripper 1900X and Intel Core i5-12400T are both desktop processors that land at the same 57th percentile in the benchmark database, yet they achieve that standing through entirely different means. The Threadripper 1900X dominates the Cinebench suite with six wins, while the Core i5-12400T counters with decisive victories in Geekbench, particularly in single-core performance. The data reveals a classic tension between a high-core-count platform from 2017 and a modern, power-efficient architecture from Intel's 12th generation.

Where Each One Wins

The AMD Ryzen Threadripper 1900X is the clear winner in rendering workloads. It takes all six Cinebench tests, with margins ranging from 7.9% to 8% across both multi-core and single-core variants. In Cinebench R23 multi-core, the Threadripper scores 14286 against the Intel's 13234, a 7.9% advantage. This consistent sweep suggests the Threadripper's 8-core, 16-thread configuration with 32 MB of L3 cache provides a solid foundation for sustained compute tasks. Even in single-core Cinebench tests, the Threadripper holds an edge, scoring 2016 versus 1868 in R23 single-core, which is notable given the Intel part's higher boost clock.

The Intel Core i5-12400T wins in Geekbench, and it wins big. The multi-core score of 7144 versus 6588 gives Intel a 7.8% lead, flipping the narrative from Cinebench. More striking is the single-core Geekbench result: 2044 versus 1205, a 41% gap in Intel's favor. This is the largest delta in the entire head-to-head comparison. The i5-12400T also carries integrated UHD Graphics 730, which the Threadripper lacks entirely, making it the more versatile option for systems without a discrete GPU.

The use-case split is stark. The Threadripper 1900X is built for threaded productivity where Cinebench-style workloads dominate. The Core i5-12400T, with its modern Alder Lake architecture, excels in latency-sensitive single-threaded tasks and Geekbench-style mixed workloads. Users prioritizing rendering should look at AMD; those needing responsive general-purpose computing should consider Intel.

Architecture Differences

The two processors come from different eras and design philosophies. The Threadripper 1900X uses AMD's Zen architecture, fabricated on a 14 nm process at GlobalFoundries. It packs 9,600 million transistors across a dual-die design measuring 2x 213 mm². This is a high-power, high-core-count part with a 180 W TDP, designed for the AMD Socket SP3r2 platform. It supports quad-channel DDR4 memory with 85.3 GB/s of bandwidth and offers 60 PCIe Gen 3 lanes from the CPU, a massive amount of connectivity for its time.

The Core i5-12400T uses Intel's Alder Lake architecture on a 10 nm process, built on a single 163 mm² die. It is a fundamentally different approach: 6 cores and 12 threads with a 35 W TDP, making it far more power-efficient on paper. The socket is Intel Socket 1700, and memory support spans both DDR4 and DDR5, though the memory bus is dual-channel. The PCIe implementation is Gen 5 with 20 lanes from the CPU, offering newer signaling technology but fewer total lanes. The Intel part also includes integrated graphics, a feature absent from the Threadripper.

Cache hierarchies differ significantly. The Threadripper allocates 96 KB of L1 and 512 KB of L2 per core, with a 32 MB L3 pool. The i5-12400T has 80 KB of L1 and 1.25 MB of L2 per core, but only 18 MB of shared L3. The larger per-core L2 on the Intel part suggests faster access to frequently used data, which may contribute to its Geekbench single-core dominance. The Threadripper's larger L3 cache benefits multi-threaded workloads that share data across cores.

Clock speeds tell another story. The Threadripper runs at a base of 3.80 GHz with a 4.00 GHz boost. The i5-12400T has a base clock of 1800.00 MHz, but boosts to 4.20 GHz. The Intel part boosts higher but starts much lower, indicating a power-management strategy that relies on short bursts of high frequency. The Threadripper maintains a higher sustained base clock, which helps in all-core workloads.

Head-to-Head Benchmarks

The Cinebench results are remarkably consistent. In Cinebench R15 multi-core, the Threadripper scores 1440 against 1333, an 8% win. The single-core R15 test shows 203 versus 188, also an 8% margin. Moving to R20, the multi-core score is 6000 versus 5558, another 8% edge, with single-core at 846 versus 784, a 7.9% difference. The R23 results mirror this pattern: multi-core 14286 versus 13234, and single-core 2016 versus 1868, both at 7.9%. This uniformity across Cinebench versions indicates the Threadripper's architectural advantage is stable across workload scales.

The Geekbench results break the pattern. In multi-core, the i5-12400T scores 7144 versus 6588, a 7.8% lead for Intel. This is nearly the same magnitude as the Threadripper's Cinebench wins, but in the opposite direction. The single-core Geekbench test is where the i5-12400T truly separates itself: 2044 versus 1205, a 41% deficit for the Threadripper. This is not a marginal difference; it is a generational gap in single-threaded efficiency.

Interpreting these numbers requires noting the test differences. Cinebench favors sustained multi-threaded rendering, where the Threadripper's 8 cores and higher base clock shine. Geekbench includes memory latency and branch prediction tests that reward the i5-12400T's newer architecture and higher boost clock. The 41% single-core Geekbench gap suggests the Threadripper's Zen cores are significantly behind Alder Lake in per-cycle performance, despite the higher base frequency.

The average benchmark scores reflect the overall balance. The Threadripper averages 4073 across all tests, with a percentile of 57. The i5-12400T averages 4019, also at the 57th percentile. Their nearest rivals confirm the close grouping: the Threadripper sits within 1.2% of the AMD Ryzen 9 5980HS, while the i5-12400T is within 0.9% of the Intel Xeon E-2336.

FAQ

Q: Which processor wins more benchmarks?

A: The AMD Ryzen Threadripper 1900X wins 6 of the 8 head-to-head tests, all within the Cinebench suite. The Intel Core i5-12400T wins the remaining 2, both in Geekbench.

Q: How large is the single-core Geekbench gap?

A: The Intel Core i5-12400T scores 2044 in Geekbench single-core, which is 41% higher than the Threadripper 1900X's 1205. This is the largest performance delta between the two processors.

Q: Do both processors have integrated graphics?

A: No. The Intel Core i5-12400T includes UHD Graphics 730. The AMD Ryzen Threadripper 1900X has no integrated graphics, requiring a discrete GPU for display output.

Q: What is the TDP difference?

A: The Threadripper 1900X has a TDP of 180 W. The Core i5-12400T has a TDP of 35 W, which is substantially lower.

Q: How do their average benchmark scores compare?

A: The Threadripper 1900X has an average benchmark score of 4073. The Core i5-12400T averages 4019, a difference of roughly 1.3% in favor of AMD.

Q: Which processor has more PCIe lanes?

A: The Threadripper 1900X offers 60 PCIe Gen 3 lanes from the CPU. The Core i5-12400T provides 20 PCIe Gen 5 lanes.

Specification Differences

The two processors differ in nearly every core specification. The Threadripper 1900X uses 8 cores and 16 threads, while the i5-12400T uses 6 cores and 12 threads. Base clocks are 3.80 GHz versus 1800.00 MHz, and boost clocks are 4.00 GHz versus 4.20 GHz. TDP is 180 W versus 35 W. Sockets are AMD Socket SP3r2 versus Intel Socket 1700.

Memory support diverges: the Threadripper supports DDR4 only with a quad-channel bus and 85.3 GB/s bandwidth. The i5-12400T supports both DDR4 and DDR5 with a dual-channel bus and no listed bandwidth figure. PCIe versions differ as well: Gen 3 with 60 lanes versus Gen 5 with 20 lanes. The Threadripper has no integrated graphics; the i5-12400T includes UHD Graphics 730.

Cache configurations are distinct. The Threadripper has 96 KB L1 and 512 KB L2 per core, with 32 MB of L3. The i5-12400T has 80 KB L1 and 1.25 MB L2 per core, with 18 MB of shared L3. The process nodes also differ: 14 nm at GlobalFoundries versus 10 nm at Intel. The die size is 2x 213 mm² versus 163 mm². The Threadripper has 9,600 million transistors; the i5-12400T has no listed transistor count.

Additional differences include the multiplier: the Threadripper is unlocked, while the i5-12400T is locked. The Threadripper's launch MSRP is $549; the i5-12400T's is $192. The Threadripper launched in 2017, while the i5-12400T has no listed release date. Neither supports ECC memory.

The Verdict

The data supports a clear split based on workload. Choose the AMD Ryzen Threadripper 1900X if the priority is Cinebench-style rendering performance. It wins all six Cinebench tests by roughly 8%, and its 8-core, 16-thread configuration with 32 MB of L3 cache and quad-channel memory bandwidth provides a robust platform for threaded compute. The 180 W TDP and 60 PCIe Gen 3 lanes indicate a workstation-oriented design that expects heavy, sustained loads. The unlocked multiplier also allows for tuning, though the high power draw is a consideration.

Choose the Intel Core i5-12400T if the priority is single-threaded responsiveness and Geekbench performance. The 41% lead in Geekbench single-core is decisive, and the 7.8% multi-core Geekbench win shows strength in mixed workloads. The 35 W TDP makes it far more power-efficient, and the integrated UHD Graphics 730 adds functionality the Threadripper lacks. The support for both DDR4 and DDR5 offers memory flexibility, and the PCIe Gen 5 interface provides modern connectivity despite fewer lanes.

The average benchmark scores are nearly identical, with the Threadripper at 4073 and the i5-12400T at 4019, both at the 57th percentile. This means the processors are comparable in overall throughput, but the distribution of performance is opposite. The Threadripper wins where core count matters; the i5-12400T wins where per-core efficiency matters. For rendering, the Threadripper is the data-backed choice. For general-purpose computing with an emphasis on single-threaded speed, the i5-12400T is superior. The verdict depends entirely on which benchmark suite reflects the intended use case.