Intel Core i9-9880H vs Intel Core i9-9900T Comparison

Head-to-Head Benchmarks

The benchmark data splits this comparison into two distinct camps. The Intel Core i9-9880H wins six of the eight recorded head-to-head tests, but the Intel Core i9-9900T takes the two Geekbench victories, and one of those is by a substantial margin.

In the Cinebench suite, the mobile i9-9880H consistently leads. The R15 multicore test shows the 9880H scoring 1152 against the 9900T's 1117, a 3% advantage. Single-core R15 follows the same pattern: 162 versus 157, a 3.1% lead for the 9880H. The R20 results are nearly identical in proportional terms, with the 9880H posting 4803 multicore and 677 single-core, against 4658 and 657 for the 9900T, again a 3% gap in both disciplines. The R23 test reinforces this, with the 9880H at 11437 multicore and 1614 single-core, while the 9900T lands at 11091 and 1565, a 3% delta in each case.

The Geekbench results flip the narrative. In Geekbench multicore, the 9900T scores 7298 against the 9880H's 6248, a decisive 16.8% win for the desktop part. That is the largest margin in either direction across all tests. Geekbench single-core also favors the 9900T, with 1452 versus 1372, a 5.8% lead.

What does this mean? The Cinebench family of tests, which are heavily threaded and render-focused, show a consistent but narrow advantage for the 9880H. The Geekbench tests, which mix integer, floating-point, and memory patterns, show a clear reversal. The 9900T's 16.8% multicore win in Geekbench is more than five times larger than the 9880H's 3% Cinebench advantage. So while the 9880H wins more tests, the 9900T wins bigger where it wins.

The overall average benchmark score tells a slightly different story. The 9900T averages 3499 across all recorded tests, while the 9880H averages 3433. That puts the desktop chip about 1.9% ahead by this aggregate metric, despite losing six individual tests. The 9900T also sits at the 55th percentile against all CPUs in the database, while the 9880H sits at the 54th. These are nearly identical overall positions, but they hint that the 9900T's Geekbench outliers carry more weight in the average than the 9880H's narrow Cinebench wins.

Architecture Differences

Both processors share the same fundamental architecture generation: Coffee Lake, built on Intel's 14 nm process. The 9900T is part of the Coffee Lake-R refresh with the codename Coffee Lake-R, while the 9880H belongs to the Coffee Lake-HR line. Both are 14 nm parts fabricated by Intel, so there is no process-node advantage on either side.

Core and thread counts are identical. Each chip has 8 cores and 16 threads. The cache hierarchy is also the same: 64 KB of L1 per core, 256 KB of L2 per core, and 16 MB of shared L3 cache. Neither supports ECC memory. Both use DDR4 memory over a dual-channel bus, and both deliver a memory bandwidth of 42.7 GB/s.

The differences start with clock speeds. The 9900T has a base clock of 2.10 GHz and a boost of 4.40 GHz. The 9880H runs higher across the board: 2.30 GHz base and 4.80 GHz boost. That 0.40 GHz boost advantage likely explains the 9880H's consistent Cinebench wins, since those tests scale well with peak frequency. But the 9900T's higher Geekbench scores suggest that sustained performance under mixed workloads favors the desktop part, possibly due to thermal headroom or power delivery characteristics.

Thermal design power differs markedly. The 9900T is rated at 35 W, while the 9880H carries a 45 W TDP. That is unusual, because the 9880H has the higher clocks but also the higher power envelope. The 9900T's lower TDP is a deliberate design choice for compact desktop systems, whereas the 9880H is tuned for high-performance laptops where 45 W is a typical allowance.

Physical specifications diverge as well. The 9900T uses Intel Socket 1151 and has a die size of 180.3 mm². The 9880H is a mobile BGA part, soldered to the board via Intel BGA 1440, with a smaller die at 149 mm². PCIe support also differs: the 9900T provides Gen 3 with 16 lanes from the CPU, while the 9880H lists Gen 3 without a specific lane count in the database. Integrated graphics are nearly identical: UHD Graphics 630 on the 9900T and UHD 630 on the 9880H.

Both chips were released on the same date, 2019-04-22, and both are end-of-life. Neither has an unlocked multiplier. The 9900T carries a launch MSRP of $423. The 9880H has no recorded launch MSRP.

Where Each One Wins

The 9880H is the stronger choice for threaded rendering workloads. Its Cinebench R15, R20, and R23 multicore scores all beat the 9900T by 3%, which indicates a small but repeatable advantage in CPU-bound rendering tasks. The higher 4.80 GHz boost clock is the likely driver, and the 45 W TDP gives it more sustained power headroom than the 35 W desktop chip. For single-threaded Cinebench tests, the 9880H also wins by 3% to 3.1%, so it is not just a multicore specialist. Users running short, frequency-sensitive workloads like photo filters or script compilation in single-threaded mode would see a modest edge here.

The 9900T wins in Geekbench, and it wins decisively in multicore. The 16.8% margin over the 9880H is the largest gap in the entire head-to-head set. Geekbench's mix of memory, integer, and floating-point tasks appears to favor the desktop part's thermal design. With a 35 W TDP and a socketed platform, the 9900T may sustain boost clocks longer under mixed loads, or at least avoid the thermal throttling that can affect a mobile BGA chip in a constrained chassis. The 5.8% single-core Geekbench win reinforces this pattern: even in single-threaded mixed workloads, the 9900T leads.

The average benchmark score also favors the 9900T, but barely. At 3499 versus 3433, the difference is about 1.9%, which is within the noise of many real-world workloads. The percentile rankings, 55th versus 54th, are effectively tied. So the split is not about one chip being categorically superior. It is about workload type. For Cinebench-style rendering, pick the 9880H. For Geekbench-style mixed computing, the 9900T is the one.

FAQ

Q: Which processor has the higher boost clock?

A: The Intel Core i9-9880H boosts to 4.80 GHz, while the Intel Core i9-9900T boosts to 4.40 GHz. The 9880H also has a higher base clock at 2.30 GHz versus 2.10 GHz.

Q: How much faster is the 9900T in Geekbench multicore?

A: The 9900T scores 7298, while the 9880H scores 6248. That is a 16.8% advantage for the 9900T, the largest margin in any head-to-head test.

Q: Does the 9880H win every Cinebench test?

A: Yes. In Cinebench R15, R20, and R23, both multicore and single-core, the 9880H leads by 3% to 3.1%. The R15 single-core margin is 3.1%, while all other Cinebench deltas are 3%.

Q: What is the TDP difference between these two chips?

A: The 9900T has a 35 W TDP, while the 9880H has a 45 W TDP. Despite the higher TDP, the 9880H still loses to the 9900T in Geekbench tests.

Q: Do both processors have the same core and thread counts?

A: Yes, both have 8 cores and 16 threads. They also share the same L3 cache size of 16 MB shared, and identical L1 and L2 cache per core.

Q: Which chip has a higher average benchmark score?

A: The 9900T averages 3499 across all recorded tests, compared to 3433 for the 9880H. The 9900T also sits at the 55th percentile versus the 9880H's 54th percentile.

The Verdict

The data points to a workload-dependent decision. The Intel Core i9-9880H is the pick for Cinebench-style rendering and single-threaded frequency-sensitive tasks. It wins all six Cinebench tests by 3% or 3.1%, and its 4.80 GHz boost clock is the highest of the two. The 45 W TDP suggests it can sustain performance in a laptop chassis designed for that power envelope. If the primary use is video rendering, 3D scene compilation, or any heavily threaded CPU workload measured by Cinebench, the 9880H is the better performer.

The Intel Core i9-9900T is the pick for mixed computing workloads as measured by Geekbench. Its 16.8% multicore win and 5.8% single-core win over the 9880H are too large to ignore, and its 35 W TDP makes it an efficient desktop option for compact builds. The average benchmark score also favors the 9900T, albeit by a slim 1.9% margin. For users who run a variety of applications, from office productivity to code compilation to light content creation, the 9900T's Geekbench dominance suggests broader real-world competence.

There is no universal winner. The 9880H wins more tests, but the 9900T wins the bigger ones. The 55th versus 54th percentile rankings confirm that these chips are peers in the overall CPU landscape. Choose the 9880H if rendering performance is the sole priority. Choose the 9900T if you want the higher average score, the better Geekbench results, and the lower 35 W TDP in a socketed desktop platform.