AMD Ryzen 7 3800XT vs Intel Core i9-9880H Comparison

The Intel Core i9-9880H and AMD Ryzen 7 3800XT occupy the same broad performance tier in the database, with average benchmark scores of 3433 and 3515 respectively and nearly identical percentile rankings of 54 and 55 against all recorded CPUs. Yet the head-to-head data tells a far more one-sided story than those aggregate figures suggest, and the reason is rooted in one fundamental difference: one is a mobile part and one is a desktop part. The i9-9880H is a Coffee Lake-HR design soldered onto an Intel BGA 1444-style mobile platform, while the 3800XT is a Socket AM4 desktop processor. That distinction shapes everything from thermal envelopes to sustained throughput.

Head-to-Head Benchmarks

Every direct comparison in the recorded data goes to AMD. The Ryzen 7 3800XT sweeps all four head-to-head tests, and the margins are substantial.

The largest gap appears in Cinebench R15 multi-core, where the 3800XT scores 2230 against the i9-9880H's 1152, a 48.3 percent difference. That is not a marginal win, it is a rout, and it reflects the desktop chip's freedom from the mobile power ceiling. The pattern repeats in Geekbench multi-core: 8561 for the 3800XT versus 6248 for the i9-9880H, a 27 percent gap.

Single-core results narrow the spread but do not flip it. The 3800HT posts 219 in Cinebench R15 single-core against 162 for Intel, a 26 percent difference, and 1773 versus 1372 in Geekbench single-core, a 22.6 percent gap. Even in lightly threaded workloads, where the i9-9880H's 4.80 GHz boost clock is nominally higher than AMD's 4.70 GHz, the Zen 2 architecture holds the lead.

The database also records additional 3800XT results that contextualize its scaling: 3DMark CPU profile scores of 748 for single thread, 1475 for two threads, 2795 for four threads, 4743 for eight threads, 6307 for sixteen threads, and 6294 at max threads. The near-identical sixteen-thread and max-thread scores confirm that its 16 threads are fully saturated with no additional headroom beyond the SMT threads.

Architecture Differences

These two chips take entirely different paths to eight cores and sixteen threads. The i9-9880H is built on Intel's 14 nm Coffee Lake process at Intel's own foundry, with a die size of 149 mm². The 3800XT uses TSMC's 7 nm node for its Zen 2 "Matisse 2" design, with a die measuring 74 mm² and 3,800 million transistors. The node gap is the single largest structural difference here, and it explains much of the efficiency story: the desktop part carries a 105 W TDP while the mobile chip is specified at 45 W.

Cache configurations diverge sharply at L2 and L3. Both share 64 KB of L1 per core, but the 3800XT doubles L2 to 512 KB per core versus 256 KB per core on Intel, and doubles L3 to 32 MB versus 16 MB shared. For cache-sensitive workloads like rendering and compilation, that capacity advantage compounds with the clock and power headroom.

Platform features also differ. The 3800XT supports PCIe Gen 4 while the i9-9880H is limited to Gen 3, and AMD's memory bandwidth figure of 51.2 GB/s exceeds Intel's 42.7 GB/s, though both support dual-channel DDR4 and neither supports ECC. The i9-9880H integrates UHD 630 graphics, a necessity for a mobile platform, while the 3800XT has no integrated GPU at all and requires a discrete card. One more enthusiast-relevant distinction: the 3800XT ships with an unlocked multiplier, while the i9-9880H does not, and being soldered to its BGA 1444 socket means no upgrades regardless.

Where Each One Wins

Strictly from the benchmark data, the 3800XT wins everywhere that was measured. The i9-9880H records zero head-to-head victories. Its best showing is Geekbench single-core, where it trails by 22.6 percent, its narrowest deficit.

So where does the i9-9880H make sense? The data points to context rather than raw performance. It is a mobile-segment processor, meaning it belongs in machines where the 3800XT physically cannot go. Its UHD 630 integrated graphics enable operation without a discrete GPU, something the 3800XT cannot do. Its 45 W TDP is less than half the 105 W of the AMD part, which matters in thermally constrained enclosures.

The 3800XT's case is straightforward: it dominates every measured workload. Its average score of 3515 places it in the 55th percentile against all CPUs, and its nearest rivals in the database, the Intel Atom x7213RE at 3520, the Core i3-12300T at 3525, the Xeon E-2176G at 3502, and the Xeon W-2135 at 3530, all cluster within half a percent. Those are odd stablemates for an eight-core desktop chip, which raises an interesting question about how averaging across different benchmark suites can flatten distinctions that individual tests expose clearly.

Specification Differences

The fields where these two processors diverge:

• Base clock: 2.30 GHz (i9-9880H) vs 3.80 GHz (3800XT)
• Boost clock: 4.80 GHz (i9-9880H) vs 4.70 GHz (3800XT), the only clock figure where Intel leads
• TDP: 45 W vs 105 W
• Socket: Intel BGA 1444 vs AMD Socket AM4
• Architecture: Coffee Lake (Coffee Lake-HR) vs Zen 2 (Matisse 2)
• Process node: 14 nm at Intel vs 7 nm at TSMC
• Die size: 149 mm² vs 74 mm²
• L2 cache: 256 KB per core vs 512 KB per core
• L3 cache: 16 MB shared vs 32 MB
• Memory bandwidth: 42.7 GB/s vs 51.2 GB/s
• PCIe: Gen 3 vs Gen 4
• Integrated graphics: UHD 630 vs none
• Market segment: Mobile vs Desktop
• Production status: End-of-life vs Active
• Multiplier: locked vs unlocked
• Launch MSRP: not recorded for the i9-9880H, $399 for the 3800XT
• Release timing: the i9-9880H arrived in April 2019, the 3800XT in July 2020

Where they match: eight cores, sixteen threads, 64 KB L1 per core, DDR4 support, dual-channel memory, no ECC, and a transistor count recorded only for AMD.

FAQ

Q: Does the Intel Core i9-9880H beat the Ryzen 7 3800XT in any benchmark?

A: No. The 3800XT wins all four head-to-head tests in the database, with margins ranging from 22.6 percent in Geekbench single-core to 48.3 percent in Cinebench R15 multi-core.

Q: Why is the multi-core gap so much larger than the single-core gap?

A: The 48.3 percent Cinebench R15 multi-core deficit versus a 26 percent single-core deficit suggests the i9-9880H's 45 W mobile envelope limits sustained all-core throughput, while its 4.80 GHz boost clock keeps single-thread results closer.

Q: Do these chips have the same core and thread counts?

A: Yes. Both are eight-core, sixteen-thread processors, so the performance gap comes from architecture, clocks, cache, and power budget rather than core count.

Q: Can either processor run without a discrete graphics card?

A: Only the i9-9880H, which integrates UHD 630 graphics. The 3800XT has no integrated GPU and requires a discrete card.

Q: Which processor is still in production?

A: The 3800XT is listed as Active. The i9-9880H is End-of-life.

Q: Are these CPUs comparable overall in the database rankings?

A: Surprisingly, yes. Their percentile rankings against all CPUs are 54 and 55, and their average benchmark scores differ by under 100 points, even though the direct comparisons heavily favor the 3800XT.

The Verdict

If the decision is purely about performance, the data leaves no ambiguity: the Ryzen 7 3800XT wins every measured contest, by margins from 22.6 percent to 48.3 percent, backed by double the L2 and L3 cache, higher memory bandwidth, PCIe Gen 4, an unlocked multiplier, and an upgradable AM4 socket. It is also the only one of the two still in active production.

The i9-9880H's justification exists entirely outside the benchmark table. It is a mobile processor for systems where a 105 W desktop part is not an option, it brings integrated graphics the AMD chip lacks, and its 45 W TDP suits portable and compact machines. Within that context it holds its own, sitting at the 54th percentile with rivals like the Core i7-10875H, which scores within a rounding error of it at 3432 versus 3433.

The curious takeaway from this pairing is how misleading aggregate scores can be. Two processors separated by less than one percentile point turn out to be separated by nearly fifty percent in the benchmark that matters most for heavy multi-core work. When comparing across market segments, the head-to-head numbers, not the averages, should drive the decision.