Intel Core i5-12500T vs Intel Core i7-9800X Comparison

The Verdict

The benchmark data presents a clear split between these two Intel desktop processors. The Intel Core i7-9800X, an end-of-life Skylake-X part, wins six of the eight head-to-head comparisons, taking every Cinebench test across R15, R20, and R23 in both single-core and multi-core runs. The Intel Core i5-12500T, an active Alder Lake-S chip, counters with wins in both Geekbench tests, including a substantial 24.6% margin in single-core performance. The i7-9800X is the choice for sustained multi-threaded rendering workloads where its eight cores and sixteen threads deliver consistent Cinebench advantages, with a 10.8% lead in every multi-core Cinebench test. The i5-12500T is the better pick for general desktop responsiveness and lightly threaded applications, as shown by its Geekbench single-core score of 1854 against 1398 for the i7-9800X. Its 35W TDP also makes it far more suitable for compact or power-conscious systems compared to the 165W TDP of the i7-9800X. Users needing PCIe Gen 5 connectivity and integrated graphics will find those only on the i5-12500T, while those needing quad-channel memory or 44 PCIe Gen 3 lanes must choose the i7-9800X. The data does not show a universal winner; it shows two processors with different strengths for different usage patterns.

FAQ

Q: Which processor is faster in Cinebench R23 multi-core?

A: The Intel Core i7-9800X scores 15416 in Cinebench R23 multi-core, which is 10.8% ahead of the Intel Core i5-12500T's score of 13913 in the same test.

Q: Which processor wins in Geekbench single-core?

A: The Intel Core i5-12500T wins Geekbench single-core with a score of 1854, beating the Intel Core i7-9800X which scores 1398. The delta is 24.6% in favor of the i5-12500T.

Q: Do these processors support the same memory types?

A: No. The Intel Core i7-9800X supports DDR4 memory only, while the Intel Core i5-12500T supports both DDR4 and DDR5 memory.

Q: Which processor has integrated graphics?

A: Only the Intel Core i5-12500T has integrated graphics, featuring UHD Graphics 770. The Intel Core i7-9800X has no integrated graphics listed in the database.

Q: How do the average benchmark scores compare?

A: The Intel Core i7-9800X has an average benchmark score of 4455, placing it in the 58th percentile of all CPUs. The Intel Core i5-12500T has an average benchmark score of 4216, placing it in the 57th percentile.

Q: Which processor supports more PCIe lanes?

A: The Intel Core i7-9800X supports 44 PCIe Gen 3 lanes (CPU only), while the Intel Core i5-12500T supports 20 PCIe Gen 5 lanes (CPU only). The i5-12500T uses a newer PCIe generation but offers fewer lanes.

Architecture Differences

The two processors come from fundamentally different Intel design eras. The Intel Core i7-9800X uses the Skylake architecture under the Skylake-X codename, built on Intel's 14 nm process node. It belongs to the Core i7 X-Series 9th Gen family. The Intel Core i5-12500T uses the Alder Lake architecture under the Alder Lake-S codename, built on Intel's 10 nm process node. It belongs to the Core 12th Gen family and is part of the Core i5 Alder Lake-S series. The die size for the i5-12500T is 163 mm², while no die size is recorded for the i7-9800X.

Cache layouts differ notably between the two. The i7-9800X has 64 KB of L1 cache per core, 1 MB of L2 cache per core, and 16.5 MB of shared L3 cache. The i5-12500T has 80 KB of L1 cache per core, 1.25 MB of L2 cache per core, and a larger 18 MB of shared L3 cache. Despite having fewer cores, the i5-12500T carries more total cache capacity at the L3 level.

Memory architecture also diverges. The i7-9800X supports DDR4 memory over a quad-channel bus with a recorded memory bandwidth of 85.3 GB/s. The i5-12500T supports both DDR4 and DDR5 memory over a dual-channel bus, with no memory bandwidth figure recorded in the database. PCIe support differs as well: the i7-9800X provides 44 PCIe Gen 3 lanes, while the i5-12500T provides 20 PCIe Gen 5 lanes. Neither processor supports ECC memory. The i5-12500T includes integrated UHD Graphics 770, while the i7-9800X has no integrated graphics listed.

The i7-9800X has an unlocked multiplier, allowing overclocking, while the i5-12500T has a locked multiplier. The i7-9800X is marked as end-of-life in production status, while the i5-12500T is marked as active. The i7-9800X was released on 2018-10-18, while no release date is recorded for the i5-12500T. The i7-9800X has a launch MSRP of $589, while no launch MSRP is recorded for the i5-12500T.

Specification Differences

The core configuration differs immediately: the i7-9800X has 8 cores and 16 threads, while the i5-12500T has 6 cores and 12 threads. Base clock speeds are dramatically different. The i7-9800X has a base clock of 3.80 GHz, while the i5-12500T has a base clock of 2000.00 MHz. Boost clocks are closer, with the i7-9800X boosting to 4.50 GHz and the i5-12500T boosting to 4.40 GHz.

Thermal design power is a major separator. The i7-9800X has a TDP of 165W, while the i5-12500T has a TDP of 35W. That is a difference of 130W and makes the i5-12500T far more appropriate for low-power or small-form-factor builds. The sockets are incompatible: the i7-9800X uses Intel Socket 2066, while the i5-12500T uses Intel Socket 1700.

Memory support differs as noted above: the i7-9800X is DDR4-only with quad-channel support, while the i5-12500T supports both DDR4 and DDR5 over dual-channel. Memory bandwidth is recorded for the i7-9800X at 85.3 GB/s, with no figure for the i5-12500T. PCIe support differs: the i7-9800X has Gen 3 with 44 lanes, the i5-12500T has Gen 5 with 20 lanes. The i7-9800X has no integrated graphics; the i5-12500T has UHD Graphics 770. The multiplier is unlocked on the i7-9800X and locked on the i5-12500T. Part numbers also differ: SREZ9 for the i7-9800X and SRL5W for the i5-12500T. The process node differs: 14 nm for the i7-9800X and 10 nm for the i5-12500T.

Head-to-Head Benchmarks

The Cinebench suite tells a consistent story. In Cinebench R15 multi-core, the i7-9800X scores 1553 against 1402 for the i5-12500T, a 10.8% margin. In Cinebench R15 single-core, the i7-9800X scores 219 against 197, an 11.2% margin. Cinebench R20 multi-core shows the i7-9800X at 6474 versus 5843, again 10.8% ahead. Cinebench R20 single-core has the i7-9800X at 913 versus 824, another 10.8% advantage. Cinebench R23 multi-core shows the i7-9800X at 15416 versus 13913, a 10.8% lead. Cinebench R23 single-core has the i7-9800X at 2176 versus 1964, also 10.8% ahead. In every Cinebench test except R15 single-core, the delta is exactly 10.8%, which indicates a consistent per-thread and per-core advantage for the older chip in this rendering workload.

The Geekbench results flip the picture. In Geekbench multi-core, the i5-12500T scores 7733 against 7488 for the i7-9800X, a 3.2% win for the newer chip. In Geekbench single-core, the i5-12500T scores 1854 against 1398 for the i7-9800X, a commanding 24.6% margin. This is the largest performance gap in either direction across all eight head-to-head tests. The i7-9800X wins six of the eight comparisons, but the i5-12500T takes the two Geekbench tests, including the single-core test by a wide margin.

The average benchmark scores reflect the mixed results. The i7-9800X averages 4455 across its benchmark suite, placing it in the 58th percentile of all CPUs. The i5-12500T averages 4216, placing it in the 57th percentile. The i7-9800X sits within 1.3% of its nearest rivals, the Intel Core i7-12700TE and Intel Core i5-1250P, which score 4513 and 4515 respectively. The i5-12500T sits within 1.3% of the Intel Core i9-9900, which scores 4163, and within 0.7% of the Intel Core i5-11500H at 4187. The i7-9800X also sits 0.3% behind the AMD Ryzen 5 PRO 5650GE, which scores 4470, and 1% ahead of the AMD Ryzen 7 PRO 4750GE, which scores 4411. The i5-12500T sits 0.4% behind the Intel Xeon E-2378 at 4232 and 0.7% behind the Intel Core i7-1265U at 4248.

The benchmark data indicates the i7-9800X is the stronger multi-threaded rendering part, with its Cinebench wins showing a consistent 10.8% advantage across most tests. The i5-12500T, however, demonstrates superior single-threaded performance in Geekbench, likely reflecting the architectural efficiency of Alder Lake. Its 24.6% single-core Geekbench win is the standout result of this comparison. The i5-12500T also wins Geekbench multi-core, though by a much smaller 3.2% margin, suggesting that its lower core count is partially offset by higher per-core efficiency in that workload. Users prioritizing Cinebench-style rendering should choose the i7-9800X; users prioritizing Geekbench-style general performance and lower power draw should choose the i5-12500T.