AMD Ryzen 7 3780U

Launched in late 2019 for thin-and-light laptops, the AMD Ryzen 7 3780U is a 4-core, 8-thread mobile processor built on the Zen+ architecture (codenamed "Picasso") using a 12 nm process at GlobalFoundries. It occupies the 42nd percentile among all CPUs in the database, with an average benchmark score of 1710. The 3780U sits in a peculiar position: it is an older-generation part now at end-of-life, yet its score profile places it within a hair's breadth of several desktop and mobile chips from different eras. This analysis breaks down the data to see exactly where this mobile chip stands, what its single-thread and multi-thread split implies for daily use, and who should still consider it for a laptop today.

Single-Thread vs Multi-Thread Behavior

The most striking feature in the benchmark data is the massive gap between single-thread and multi-thread performance. In Cinebench R23, the 3780U scores 834 points in single-core and 5914 points in multi-core. The multi-core score is roughly 7.1 times the single-core score, which is remarkably high for a 4-core/8-thread part — an ideal scaling would be about 8 times, so the 3780U is extracting nearly perfect parallel efficiency from its eight threads. This suggests the Zen+ architecture handles heavy multi-threaded loads without significant contention, a strong point for a 15 W mobile chip.

However, the single-thread score of 834 in R23 is low in absolute terms. For comparison, the nearest rivals in the database have average scores around 1710 — but these are averaged across multiple benchmark types. Looking at the raw Cinebench numbers, the 3780U’s single-core performance is clearly the limiting factor. The base clock of 2.30 GHz and boost of 4.00 GHz represent a large turbo range, but the single-thread results indicate that the chip cannot sustain high clocks under short bursts, or that the Zen+ core design is simply outclassed by newer architectures. The R15 single-core score of 84 is similarly modest. The data implies that for everyday tasks like web browsing, office documents, and light coding — which rely heavily on single-thread speed — the 3780U will feel adequate but not snappy, especially when compared to modern mid-range laptop chips.

The multi-thread picture is far more favorable. The R20 multi-core score of 2483 and R15 multi-core score of 595 show that the 3780U can handle sustained parallel workloads — video encoding, 3D rendering, and batch photo processing — much better than its single-thread results would suggest. The 4 MB shared L3 cache and 512 KB L2 per core help keep threads fed, but the real story is the near-linear scaling. For a 15 W part, this multi-thread capability is its primary strength, and it explains why the average benchmark score of 1710 is not lower despite weak single-thread results.

How It Compares

The nearest rivals are a mixed bag of desktop and mobile parts, all with average scores within 0.2% of the 3780U’s 1710. The Intel Xeon E3-1265L v4 matches the 3780U exactly with an average score of 1709 and a deltaPct of 0%. This is a low-power server chip from a previous generation. The data shows the 3780U ties it in overall performance, but the Xeon likely achieves that score with different strengths — probably better sustained multi-thread on a desktop platform, while the 3780U counters with better integrated graphics (Radeon Vega 11) and lower power consumption. The tie means neither chip has a decisive overall edge.

The Intel Core i7-990X is a 6-core desktop part from 2011, scoring 1708 with a deltaPct of 0.1% — meaning the 3780U is 0.1% faster on average. This is a remarkable result for a 15 W mobile chip against a high-end desktop processor with more cores. However, the i7-990X likely wins in raw multi-thread due to its core count, while the 3780U’s advantage comes from better single-thread and memory bandwidth (38.4 GB/s dual-channel DDR4) relative to the older platform. The delta is so small as to be noise, but the implication is that the 3780U holds its own against a desktop chip that was once top-tier.

The Intel Xeon E5-1620 v3 scores 1713, putting the 3780U at -0.2% behind. This is a 4-core/8-thread Haswell-EP desktop chip. The 3780U nearly matches it, which is impressive given the Xeon has access to quad-channel memory and higher TDP limits. The 3780U closes the gap through higher clocks per core (boost 4.00 GHz) and a more modern memory controller. The data suggests the 3780U’s performance is roughly equivalent to a mid-range desktop Xeon from 2014, making it a capable part for its power envelope.

Finally, the Intel Core i7-4860HQ is a mobile chip from 2014, scoring 1714 with the 3780U at -0.2%. This is perhaps the most direct comparison: both are 4-core mobile processors with integrated graphics. The 3780U matches the i7-4860HQ within noise, despite the Intel part having a higher base clock (likely around 2.4 GHz) and more mature architecture at the time. The 3780U ties it, meaning Zen+ brings competitive performance to the mobile segment even against a well-regarded Haswell mobile chip.

Who Should Consider It

Given the benchmark data, the 3780U is best suited for users whose workloads are heavily multi-threaded but do not demand top-tier single-thread speed. For gaming, the data is mixed: the Radeon Vega 11 integrated graphics is the only graphics option, and while the multi-core score of 5914 in R23 suggests the CPU can feed a discrete GPU, the 15 W TDP limits sustained performance. The single-thread score of 834 in R23 means lighter e-sports titles may run fine, but modern AAA games that rely on strong single-thread performance will likely bottleneck. The 42nd percentile overall ranking reinforces that this is not a high-end gaming CPU.

Content creation is a stronger use case. The multi-thread R20 score of 2483 and R15 score of 595 indicate that video editing software like Premiere Pro or DaVinci Resolve, which use many threads, will see respectable performance. Batch photo processing in Lightroom and 3D modeling in Blender will also benefit from the near-linear scaling. For a mobile workstation in a thin-and-light chassis, the 3780U offers a balanced profile, though the 4 MB L3 cache is small by modern standards, which may hurt in large dataset workloads.

Office and productivity tasks are where the 3780U will feel most at home, but with a caveat. Spreadsheets, word processing, and web apps are mostly single-threaded, and the R15 single-core score of 84 is low — modern office laptops score much higher. The 3780U will handle these tasks without issue, but it will not feel fast. For users who run macro-heavy Excel workbooks or compile code, the multi-thread strength helps, but the single-thread weakness shows in every click and scroll. End-of-life status also means it is only available in older laptops, so buyers should only consider it if the price is right and the multi-thread workloads are the priority.

FAQ

Q: How does the Ryzen 7 3780U perform in multi-threaded workloads compared to its single-threaded performance?

A: The multi-thread score of 5914 in Cinebench R23 is about 7.1 times the single-core score of 834, indicating near-perfect scaling across 8 threads. This means heavy parallel tasks like rendering and encoding are its strong suit, while single-thread tasks lag behind.

Q: Is the Ryzen 7 3780U faster than the Intel Core i7-990X?

A: The 3780U has an average benchmark score of 1710, which is 0.1% higher than the i7-990X’s 1708. This is a statistical tie, but the 3780U achieves this with far lower power consumption (15 W TDP) and a modern platform.

Q: What memory does the Ryzen 7 3780U support?

A: It supports DDR4 memory in a dual-channel configuration, with a maximum memory bandwidth of 38.4 GB/s. It does not support ECC memory.

Q: Does the Ryzen 7 3780U have integrated graphics?

A: Yes, it includes Radeon Vega 11 integrated graphics, which is the only graphics option since the chip is designed for mobile thin-and-light laptops.

Q: What is the production status of the Ryzen 7 3780U?

A: The part is marked as end-of-life, having been released on October 21, 2019. It is no longer in production, so it is only available in existing laptops or the used market.

Q: How does the Ryzen 7 3780U compare to the Intel Core i7-4860HQ?

A: The 3780U scores 1710 on average, which is 0.2% lower than the i7-4860HQ’s 1714. The two are effectively identical in overall performance, making the 3780U a competitive successor to this older mobile chip.

Power and Thermals

The Ryzen 7 3780U has a TDP of 15 W, which places it in the ultra-low-power class for mobile processors. This is the standard envelope for thin-and-light laptops without discrete cooling solutions. The 12 nm process node from GlobalFoundries is not the most efficient by modern standards, but the 15 W TDP means the chip is designed to be passively cooled or with a small fan. The data shows that the 3780U can sustain multi-threaded loads well for its class — the R23 multi-core score of 5914 is high for a 15 W part — but this comes with the caveat that sustained boosts to 4.00 GHz will generate heat. A capable air cooler, such as a single heat pipe with a slim fan, should suffice for most workloads. However, users pushing long rendering tasks will likely see the chip throttle to base clock (2.30 GHz) to stay within the 15 W envelope. The lack of an unlocked multiplier means no overclocking headroom, so thermals are purely a factor of the laptop’s chassis design, not user tuning.

Platform and Compatibility

The 3780U uses the AMD Socket FP5, a BGA (ball-grid array) socket that is soldered to the motherboard, meaning it is not upgradeable. The platform is based on the Zen+ "Picasso" architecture, which supports PCIe Gen 3. The integrated Radeon Vega 11 graphics is the only GPU option, and it relies on the dual-channel DDR4 memory (38.4 GB/s bandwidth) for its framebuffer. The chip supports only DDR4 memory — no DDR5 — and does not support ECC memory. The 4 MB shared L3 cache is the total cache pool, which is small by modern standards but adequate for the 4-core design. The upgrade path is effectively nonexistent: the socket is end-of-life, so any laptop with this chip is a sealed unit. Users should consider the lack of upgradeability a fixed constraint, and the PCIe Gen 3 support means any storage or GPU expansion is limited to that generation’s bandwidth. The part number YW3700C4T4MFG confirms the mobile, soldered design.

Benchmark Performance

The raw benchmark scores paint a clear picture of a chip that is a multi-threaded overachiever and a single-threaded underperformer. In Cinebench R23, the multi-core score of 5914 places it well above what one might expect from a 4-core/15 W part, while the single-core score of 834 is its Achilles’ heel. The R20 scores (2483 multi, 350 single) and R15 scores (595 multi, 84 single) follow the same pattern. The average benchmark score of 1710, derived from all tests, sits at the 42nd percentile of all CPUs, meaning it is slightly below the median of the entire database — but this is skewed by the fact that the database includes many desktop and high-power parts.

Comparing to rivals, the 3780U is within 0.2% of all four nearest competitors. Against the Intel Xeon E3-1265L v4, it is exactly tied (0% delta), while it is 0.1% faster than the Intel Core i7-990X. It trails the Intel Xeon E5-1620 v3 and the Intel Core i7-4860HQ by 0.2% each. These deltas are minuscule and within measurement noise, so the 3780U effectively matches all four. The implication is that the 3780U delivers desktop-class multi-threaded performance from a 2014-2016 era in a 15 W mobile package, but its single-thread scores (834 in R23) are far below what those rivals likely achieve in that specific test — the overall average masks the single-thread weakness. For a buyer, this means the 3780U is a specialized tool: excellent for rendering and encoding, but not for tasks that demand quick single-thread reactions. The data suggests that AMD sacrificed single-thread strength to achieve the multi-thread scaling within the power budget, a trade-off that defines this chip’s entire character.