Intel Core i5-13400T vs Intel Core i9-9820X Comparison

The Intel Core i5-13400T and Intel Core i9-9820X occupy different corners of the desktop market, yet their benchmark results land surprisingly close. The database records show the older i9-9820X winning every head-to-head Cinebench test, but the i5-13400T counters with a far lower power envelope, a modern platform, and integrated graphics. Both chips share a 10-core count, but the similarities end there, as the data reveals a generational clash between Raptor Lake and Skylake-X.

FAQ

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

A: The Intel Core i9-9820X wins all three multi-core Cinebench tests. It scores 1759 in R15, 7332 in R20, and 17459 in R23, while the i5-13400T scores 1716, 7152, and 17029 respectively. The i9 leads by 2.4% to 2.5% in each case.

Q: Do both CPUs have the same number of cores?

A: Yes, both have 10 cores. However, the i9-9820X has 20 threads, while the i5-13400T has 16 threads, giving the i9 a 4-thread advantage.

Q: What is the power consumption difference?

A: The i5-13400T has a TDP of 35 watts, while the i9-9820X has a TDP of 165 watts. The i5 draws significantly less power, making it a more efficient choice for low-power builds.

Q: Does the i5-13400T support DDR5 memory?

A: Yes, the i5-13400T supports both DDR4 and DDR5 memory in a dual-channel configuration. The i9-9820X only supports DDR4, but it uses a quad-channel memory bus with a recorded bandwidth of 85.3 GB/s.

Q: Which processor has integrated graphics?

A: Only the i5-13400T includes integrated graphics, specifically UHD Graphics 730. The i9-9820X has no integrated graphics, requiring a discrete GPU for display output.

Q: What is the production status of each chip?

A: The i5-13400T is listed as Active, while the i9-9820X is marked as End-of-life. The i5 was released on 2023-01-03, and the i9 was released on 2018-10-18.

Architecture Differences

The two processors come from different architectural eras. The i5-13400T is built on Raptor Lake, using a 10 nm process node, while the i9-9820X uses the older Skylake architecture on a 14 nm node. This process gap directly influences power efficiency and thermal behavior, as reflected in the TDP figures: 35 watts for the i5 versus 165 watts for the i9.

Cache hierarchies also differ. The i5-13400T has 80 KB of L1 cache per core, 1.25 MB of L2 per core, and 20 MB of shared L3 cache. The i9-9820X has 64 KB of L1 per core, 1 MB of L2 per core, and 16.5 MB of shared L3 cache. The i5 offers more cache at every level, which helps explain its competitive performance despite a much lower power budget.

Memory support is another major split. The i5-13400T supports both DDR4 and DDR5 in a dual-channel configuration, while the i9-9820X is limited to DDR4 but uses a quad-channel bus with a memory bandwidth of 85.3 GB/s. The i9's wider memory bus is a legacy advantage for bandwidth-heavy workloads, though the i5's DDR5 support offers a modern upgrade path.

PCIe connectivity differs as well. The i5-13400T provides Gen 5 with 20 lanes (CPU only), while the i9-9820X provides Gen 3 with 44 lanes (CPU only). The i5 has a faster PCIe standard, but the i9 offers more than double the lane count, which matters for multi-GPU or expansion-heavy systems.

The i5-13400T includes UHD Graphics 730, while the i9-9820X has no integrated graphics. The i5 also uses the Intel Socket 1700, whereas the i9 uses the Intel Socket 2066. The i9 has an unlocked multiplier, while the i5 does not. Finally, the i5 is an active product, while the i9 is end-of-life.

Head-to-Head Benchmarks

The head-to-head data covers six Cinebench tests, and the i9-9820X wins all of them. The margins are consistent, ranging from 2.4% to 2.5% in favor of the i9. In Cinebench R15 multi-core, the i9 scores 1759 against the i5's 1716, a 2.4% lead. The single-core R15 test shows a similar pattern: 248 for the i9 versus 242 for the i5, again a 2.4% difference.

Moving to Cinebench R20, the i9 scores 7332 in multi-core, beating the i5's 7152 by 2.5%. In single-core R20, the i9 scores 1034 against 1009, a 2.4% edge. The largest absolute gap appears in Cinebench R23 multi-core, where the i9 scores 17459 and the i5 scores 17029, a 2.5% difference. The single-core R23 test shows 2464 for the i9 and 2404 for the i5, a 2.4% margin.

The i5-13400T also has Geekbench scores in the database, with 10227 multi-core and 1899 single-core, but these are not part of the head-to-head comparison. The i9-9820X does not have Geekbench results recorded. Across the six head-to-head tests, the i9 wins all six, giving it a clean sweep with a 6-0 record.

The consistency of the deltas is notable. Every test falls within a narrow 2.4% to 2.5% band, suggesting that the i9's advantage is uniform across both single-threaded and multi-threaded workloads. The i5's newer architecture and higher boost clock of 4.4 GHz (versus 4.2 GHz for the i9) are not enough to overcome the i9's higher base clock of 3.3 GHz (versus 1.3 GHz for the i5) and its additional 4 threads.

Specification Differences

The two processors differ in nearly every specification field. The i5-13400T has 16 threads, while the i9-9820X has 20 threads. The base clock is 1300 MHz for the i5 and 3300 MHz for the i9, while the boost clock is 4.4 GHz for the i5 and 4.2 GHz for the i9. The TDP is 35 watts for the i5 and 165 watts for the i9.

The socket is Intel Socket 1700 for the i5 and Intel Socket 2066 for the i9. The architecture is Raptor Lake for the i5 and Skylake for the i9, with process nodes of 10 nm and 14 nm respectively. The i5 has 80 KB of L1 per core, 1.25 MB of L2 per core, and 20 MB of shared L3. The i9 has 64 KB of L1 per core, 1 MB of L2 per core, and 16.5 MB of shared L3.

Memory support differs: the i5 supports DDR4 and DDR5 in dual-channel, while the i9 supports only DDR4 in quad-channel with a memory bandwidth of 85.3 GB/s. PCIe is Gen 5 with 20 lanes for the i5, and Gen 3 with 44 lanes for the i9. The i5 has UHD Graphics 730, while the i9 has none. The i5 is Active, the i9 is End-of-life. The release dates are 2023-01-03 for the i5 and 2018-10-18 for the i9. The launch MSRP is $221 for the i5 and $889 for the i9. The i5 has a locked multiplier, the i9 is unlocked. Part numbers are SRMBR for the i5 and SREZ8 for the i9.

The Verdict

The data points to a clear split in use cases. The i9-9820X is the faster processor in every recorded Cinebench test, with a 2.4% to 2.5% lead across the board. It also offers 20 threads, a quad-channel memory bus with 85.3 GB/s of bandwidth, and 44 PCIe Gen 3 lanes. For users who need maximum multi-threaded performance on an older platform, the i9 is the stronger choice, provided they can accommodate its 165-watt TDP and lack of integrated graphics.

The i5-13400T, however, delivers nearly the same performance with a fraction of the power draw. Its 35-watt TDP makes it suitable for compact or low-power systems, and it includes UHD Graphics 730, eliminating the need for a discrete GPU in basic builds. It also supports DDR5 memory and PCIe Gen 5, offering a modern foundation for future upgrades. The i5 is an active product, while the i9 is end-of-life, which affects long-term availability and support.

Benchmark results indicate that the i9-9820X is the raw performance winner, but the i5-13400T is the more balanced and forward-looking option. The i5's average benchmark score of 5210 sits close to the i9's 5049, and both chips rank at the 60th percentile among all CPUs. The i5's nearest rivals include the Intel Xeon E-2378G and Intel Core i9-10850K, while the i9's nearest rivals include the Intel Core i9-12900TE and AMD Ryzen 7 PRO 5750GE. For a new build, the i5-13400T offers modern features and efficiency. For an existing Socket 2066 platform, the i9-9820X remains a capable performer.