AMD Ryzen 7 5800U vs Intel Core i7-7800X Comparison

The AMD Ryzen 7 5800U and Intel Core i7-7800X occupy the same overall performance percentile, but they achieve it through radically different means. The Ryzen 7 5800U is a modern 8-core mobile chip built on a 7 nm process, while the Core i7-7800X is a 6-core desktop part from 2017 built on 14 nm. Benchmark results show a split decision: the AMD chip wins four of six head-to-head tests, but the Intel chip wins the two most demanding multi-threaded workloads. The data suggests a mobile processor that outclasses an older desktop part in most everyday and single-threaded tasks, while the desktop part retains a lead in sustained all-core rendering.

Head-to-Head Benchmarks

The most decisive victories belong to the AMD Ryzen 7 5800U in the Cinebench R15 suite. In the multi-core test, the AMD chip scores 1613 against Intel’s 1113, a 44.9% advantage. The single-core test is even more lopsided: AMD scores 229 versus Intel’s 156, a 46.8% margin. These are not marginal wins; they represent a generational gap in per-clock efficiency and architectural throughput. The Ryzen 7 5800U’s Zen 3 architecture delivers substantially higher performance per thread than the older Skylake-X design, which explains why a 15 W mobile processor can outrun a 140 W desktop part in these specific tests.

The Geekbench results reinforce AMD’s dominance in general-purpose workloads. The Ryzen 7 5800U scores 7132 in multi-core, which is 16.1% higher than Intel’s 6144. In single-core, AMD’s 1656 beats Intel’s 1352 by 22.5%. These results indicate that for typical desktop applications, web browsing, and office productivity, the AMD chip is the faster processor despite its mobile designation. The Intel part’s higher base clock of 3.50 GHz does not compensate for its lower instructions-per-clock and older microarchitecture.

However, the tables turn completely in Cinebench R23. The Intel Core i7-7800X scores 11044 in multi-core, beating AMD’s 8154 by 26.2%. This is a substantial reversal, and it suggests that the R23 benchmark scales better with the Intel chip’s capabilities, possibly due to sustained power delivery or memory bandwidth advantages. The Intel part also wins single-core R23, scoring 1559 against AMD’s 1427, a smaller 8.5% margin. This is notable because R23 single-core is typically a strong indicator of modern efficiency, yet the older Intel chip edges out the newer AMD part here.

The win distribution is 4-2 in favor of AMD, but the Intel wins are not trivial. The R23 multi-core result is the largest absolute score in the entire comparison, showing that the Core i7-7800X can still deliver heavy rendering performance when the workload allows. The average benchmark scores tell a similar story: AMD’s average is 3369, while Intel’s is 3333, a difference of only 1.1% according to the nearestRivals data. This puts both processors in the same performance class overall, with the Ryzen 7 5800U holding a razor-thin edge in aggregate.

The Verdict

The data supports a clear split recommendation. For users who prioritize single-threaded responsiveness, general application speed, and efficiency, the AMD Ryzen 7 5800U is the definitive choice. It wins single-core by margins ranging from 8.5% to 46.8% depending on the benchmark, and it wins Geekbench multi-core by 16.1%. This makes it the better processor for everyday computing, software compilation, and any workload that benefits from modern architectural efficiency.

For users whose primary workload is sustained multi-core rendering, particularly in Cinebench R23, the Intel Core i7-7800X takes the crown. Its 26.2% lead in R23 multi-core is the single largest winning margin in the comparison, indicating that certain all-core workloads still favor the older desktop chip. However, this advantage comes with caveats: the Intel part is end-of-life, has a 140 W TDP, and is tied to the Socket 2066 platform.

The percentile data shows both chips sit at the 54th percentile among all CPUs, meaning they are statistically equivalent in overall standing. The Ryzen 7 5800U’s 1.1% average score advantage over the Core i7-7800X is within the noise of benchmark variation. The verdict is that the Ryzen 7 5800U is the more versatile and future-proof processor, while the Core i7-7800X remains a niche pick for specific rendering tasks where its R23 multi-core strength shines.

Where Each One Wins

The AMD Ryzen 7 5800U wins in four of six benchmarks, establishing dominance in several distinct categories. It wins both Cinebench R15 tests, which are older but still representative of legacy software performance. It also wins both Geekbench tests, which are more modern and better reflect current application behavior. This means the AMD chip is the superior choice for general-purpose computing, including office suites, web browsing, and software development. The 44.9% and 46.8% margins in R15 suggest that the AMD chip is dramatically faster in older or less optimized software, likely due to its higher per-core efficiency.

The Intel Core i7-7800X wins in Cinebench R23, both multi-core and single-core. This is significant because R23 is a modern benchmark that stresses current rendering engines. The 26.2% multi-core win shows that the Intel chip can leverage its higher base clock of 3.50 GHz and larger L2 cache of 1 MB per core in sustained workloads. The 8.5% single-core win in R23 is more surprising and suggests that Skylake-X’s implementation handles this specific test better than Zen 3. For users running video encoding or 3D rendering software that is optimized similarly to R23, the Intel chip offers a tangible performance advantage.

The split is essentially about workload type. The AMD chip wins in short bursts and general tasks, while the Intel chip wins in sustained all-core rendering. The Ryzen 7 5800U’s 15 W TDP and 8 cores make it an efficiency champion, but the Intel part’s 140 W TDP allows it to sustain higher clocks under load, which pays off in R23.

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD Ryzen 7 5800U has an average benchmark score of 3369, while the Intel Core i7-7800X has 3333. The AMD chip leads by 1.1% according to the nearestRivals deltaPct.

Q: Does the Intel Core i7-7800X beat the AMD Ryzen 7 5800U in any test?

A: Yes, the Intel chip wins Cinebench R23 multi-core with a score of 11044 versus AMD’s 8154, a 26.2% advantage. It also wins R23 single-core with 1559 versus 1427, an 8.5% margin.

Q: What is the biggest performance gap in the comparison?

A: The largest margin is in Cinebench R15 single-core, where the AMD Ryzen 7 5800U scores 229 against Intel’s 156, a 46.8% difference.

Q: Which processor is more efficient?

A: The AMD Ryzen 7 5800U has a TDP of 15 W, while the Intel Core i7-7800X has a TDP of 140 W. The AMD chip also uses a 7 nm process from TSMC, whereas Intel uses a 14 nm process.

Q: Are these two CPUs in the same performance class?

A: Yes, both sit at the 54th percentile among all CPUs. Their average benchmark scores differ by only 1.1%, with AMD slightly ahead.

Q: Which chip has more cores and threads?

A: The AMD Ryzen 7 5800U has 8 cores and 16 threads. The Intel Core i7-7800X has 6 cores and 12 threads.

Architecture Differences

The AMD Ryzen 7 5800U is built on the Zen 3 architecture with the codename Cezanne-U, fabricated on a 7 nm process by TSMC. It contains 10,700 million transistors on a 180 mm² die. The Intel Core i7-7800X uses the Skylake architecture with the codename Skylake-X, fabricated on a 14 nm process by Intel. The Intel chip’s transistor count and die size are not listed in the data.

The cache hierarchies differ significantly. The AMD chip has 64 KB of L1 cache per core, 512 KB of L2 cache per core, and 16 MB of shared L3 cache. The Intel chip also has 64 KB of L1 cache per core, but it offers 1 MB of L2 cache per core and only 8.25 MB of shared L3 cache. This means Intel’s per-core L2 cache is double AMD’s, but AMD’s total L3 cache is nearly double Intel’s.

Memory support also differs. Both support DDR4, but the AMD chip uses a dual-channel bus with 51.2 GB/s bandwidth. The Intel chip uses a quad-channel bus with 76.8 GB/s bandwidth. This gives Intel a 50% theoretical memory bandwidth advantage, which may explain its stronger performance in sustained multi-threaded workloads like Cinebench R23.

The AMD chip includes integrated graphics (Radeon Vega 8), while the Intel chip has none. The AMD chip uses PCIe Gen 3 with 8 lanes, while the Intel chip uses PCIe Gen 3 with 28 lanes. The AMD chip is unlocked for overclocking? No, the multiplier is locked. The Intel chip has an unlocked multiplier, allowing overclocking.

Specification Differences

The two processors differ in nearly every core specification. The AMD Ryzen 7 5800U has 8 cores and 16 threads, while the Intel Core i7-7800X has 6 cores and 12 threads. The AMD chip has a base clock of 1900 MHz and a boost clock of 4.40 GHz. The Intel chip has a base clock of 3500 MHz and a boost clock of 4.00 GHz.

The TDP ratings are dramatically different: the AMD chip is rated at 15 W, while the Intel chip is rated at 140 W. The AMD chip uses the AMD Socket FP6, while the Intel chip uses Intel Socket 2066. The AMD chip is a mobile part, while the Intel chip is a desktop part.

The release dates are several years apart: the AMD chip launched on January 11, 2021, while the Intel chip launched on June 25, 2017. The AMD chip is still in active production, while the Intel chip is end-of-life. The Intel chip has a launch MSRP of $383, which is stated once here.

The AMD chip’s part number is 100-000000285, while the Intel chip’s is SR3L4. The AMD chip does not support ECC memory, and neither does the Intel chip. The AMD chip has a locked multiplier, while the Intel chip’s multiplier is unlocked. The AMD chip includes integrated Radeon Vega 8 graphics, while the Intel chip has no integrated graphics.