Intel Core i7-5550U vs Intel Pentium Silver J5040 Comparison

The Intel Core i7-5550U and Intel Pentium Silver J5040 are both end-of-life mobile processors from Intel, but they represent very different design philosophies and eras. The Core i7-5550U is a 2015 dual-core part from the Broadwell generation with Hyper-Threading, while the Pentium Silver J5040 is a 2019 quad-core chip built on the Goldmont Plus architecture. Benchmark data from the database shows a clear and consistent performance advantage for the newer Pentium across every recorded test, despite the Core i7 carrying a higher launch MSRP. This analysis breaks down the recorded scores, specifications, and architectural differences to determine which processor suits which workload.

FAQ

Q: Which processor has the higher single-core Cinebench R23 score?

A: The Intel Pentium Silver J5040 achieves 386 points in Cinebench R23 single-core, while the Intel Core i7-5550U scores 333 points. The Pentium leads by 13.7 percent in this test.

Q: How does the multi-core performance compare in Cinebench R15?

A: In Cinebench R15 multi-core, the Intel Pentium Silver J5040 records 276 points, which is 13.8 percent higher than the Intel Core i7-5550U's 238 points. This is the smallest relative gap between the two processors in any recorded benchmark.

Q: What are the core and thread counts for each processor?

A: The Intel Core i7-5550U has 2 cores and 4 threads, while the Intel Pentium Silver J5040 has 4 cores and 4 threads. The Pentium does not support Hyper-Threading, but its physical core count is double that of the Core i7.

Q: Does either processor support ECC memory?

A: No. Both the Intel Core i7-5550U and the Intel Pentium Silver J5040 report `eccMemory: false` in the database, so neither supports ECC memory.

Q: Which chip has a higher boost clock?

A: The Intel Pentium Silver J5040 boosts to 3.20 GHz, whereas the Intel Core i7-5550U boosts to 3.00 GHz. Both have a base clock of 2000.00 MHz.

Q: What is the thermal design power (TDP) difference?

A: The Intel Core i7-5550U has a TDP of 15 watts, while the Intel Pentium Silver J5040 has a TDP of 10 watts. The Pentium consumes less power while delivering higher benchmark scores.

The Verdict

The recorded data points to a clear winner for most users: the Intel Pentium Silver J5040 outperforms the Intel Core i7-5550U in every single benchmark recorded in the database. Out of five head-to-head tests, the Pentium wins all five, with a consistent margin of roughly 13.7 to 14.2 percent depending on the workload. This is a notable result because the Core i7-5550U was positioned as a higher-tier product at launch, with a launch MSRP of $426 compared to the Pentium's $161. The Pentium's advantage appears across both single-threaded and multi-threaded tests, meaning it is not a case of one chip favoring one workload type over another; the J5040 is simply faster everywhere.

Who should pick the Intel Core i7-5550U? The data suggests very few users would benefit from choosing this older chip. It has a lower average benchmark score of 813 compared to the Pentium's 801, a difference of 1.5 percent, but that average is skewed by the Pentium having more recorded single-core results. In the direct head-to-head benchmarks, the Core i7 loses every time. The only reason to select the Core i7-5550U would be if the specific socket (Intel BGA 1168) or the integrated graphics (Intel HD 6000) were required for a legacy platform, since the Pentium uses Intel BGA 1090 and UHD Graphics 605. But purely on compute performance, the Pentium Silver J5040 is the superior choice.

Who should pick the Intel Pentium Silver J5040? Anyone looking for a low-power mobile processor with better benchmark results. The Pentium offers double the physical cores, a higher boost clock, higher memory bandwidth at 38.4 GB/s versus 29.9 GB/s, and a lower TDP of 10 watts versus 15 watts. Its launch MSRP of $161 is also lower, although pricing is not a factor in this analysis. The J5040 sits at the 21st percentile of all CPUs in the database, while the Core i7-5550U sits at the 22nd percentile, so both are near the lower end of overall performance, but the Pentium is the better performer within that range.

Head-to-Head Benchmarks

The head-to-head benchmark results in the database are remarkably consistent. The Intel Pentium Silver J5040 wins all five recorded tests, with the delta percentage hovering around negative 13.7 percent for the Core i7-5550U in most cases. The largest margin of victory for the Pentium comes in Cinebench R20 single-core, where the J5040 scores 162 points against the Core i7-5550U's 139 points, a difference of 14.2 percent. This is the only test where the margin exceeds 14 percent, indicating that the Pentium's single-thread advantage is slightly more pronounced in the newer Cinebench version.

In Cinebench R23 single-core, the Pentium Silver J5040 scores 386 points, while the Core i7-5550U scores 333 points. That is a 13.7 percent lead for the Pentium, the same relative margin seen in R23 multi-core. The R23 multi-core test shows the Pentium at 2739 points versus the Core i7's 2363 points, again a 13.7 percent difference. This consistency across both single-core and multi-core workloads suggests that the Pentium's architectural efficiency from Goldmont Plus gives it a uniform advantage over the older Broadwell design.

Cinebench R20 multi-core results follow the same pattern: the Pentium Silver J5040 records 1150 points, while the Core i7-5550U records 992 points. The 13.7 percent gap is identical to the R23 multi-core result. Even in the older Cinebench R15 multi-core test, which often favors higher clock speeds, the Pentium leads with 276 points against the Core i7's 238 points, a 13.8 percent difference. There is no benchmark in the database where the Core i7-5550U comes out ahead, and the near-identical margins across all tests indicate a stable performance differential rather than a workload-specific fluke.

The average benchmark scores in the database reinforce this picture. The Core i7-5550U has an average benchmark score of 813, while the Pentium Silver J5040 has an average of 801. That the Pentium's average is slightly lower despite winning every head-to-head test is due to the fact that the averages include different test suites; the Core i7 has an extra single-core result in its benchmark list that pulls its average up. The nearest rivals for each chip also show similar levels: the Core i7-5550U's closest rival is the Intel Core 2 Extreme QX9775 with an identical average score of 813, while the Pentium Silver J5040's nearest rival is the AMD A10-7700K with an average of 801. Both processors sit in a performance tier populated by older desktop and mobile parts, but the Pentium is consistently ahead of the Core i7 in direct comparison.

Specification Differences

The specification tables for these two processors reveal several key differences beyond raw benchmark scores. The most obvious is core count: the Intel Core i7-5550U has 2 cores and 4 threads, while the Intel Pentium Silver J5040 has 4 cores and 4 threads. This means the Core i7 relies on Hyper-Threading to reach four threads, whereas the Pentium achieves the same thread count with physical cores. Neither chip has an unlocked multiplier, so overclocking is not an option for either.

Clock speeds differ as well. Both processors have the same base clock of 2000.00 MHz, but the boost clock favors the Pentium at 3.20 GHz versus the Core i7's 3.00 GHz. This 200 MHz boost advantage contributes to the Pentium's higher single-core scores. The TDP also differs, with the Core i7-5550U rated at 15 watts and the Pentium Silver J5040 at 10 watts, making the Pentium the more power-efficient option according to the recorded specifications.

Memory support is another point of divergence. The Core i7-5550U supports DDR3 memory, while the Pentium Silver J5040 supports DDR4. Both use dual-channel memory buses, but the memory bandwidth figures favor the Pentium: 38.4 GB/s for the J5040 versus 29.9 GB/s for the Core i7. The PCIe lanes also differ, with the Core i7 offering Gen 2 with 12 lanes and the Pentium offering Gen 2 with 6 lanes, both counted for CPU-only usage. The integrated graphics are different as well: the Core i7 has Intel HD 6000, while the Pentium has UHD Graphics 605.

Socket compatibility is a major separation point. The Core i7-5550U uses Intel BGA 1168, while the Pentium Silver J5040 uses Intel BGA 1090. These sockets are not interchangeable, meaning any system built for one processor cannot simply swap in the other. The die size also differs, with the Core i7 measuring 133 mm² and the Pentium at 93 mm². The Core i7 has a transistor count of 1,900 million, while the database does not list a transistor count for the Pentium. Finally, the release dates are far apart: the Core i7 launched in February 2015, and the Pentium launched in November 2019, which explains the architectural gap between them.

Architecture Differences

The architectural divide between these two chips is substantial. The Intel Core i7-5550U is based on Broadwell, specifically the Broadwell-U codename, and belongs to the Core i7 (Broadwell-U) generation. It is built on a 14 nm process node at Intel's foundry. The cache hierarchy for the Core i7 includes 64 KB of L1 cache per core, 256 KB of L2 cache per core, and 4 MB of shared L3 cache. This is a classic high-end mobile design from 2015, with a relatively large L3 cache for its era and a transistor count of 1,900 million.

The Intel Pentium Silver J5040 uses Goldmont Plus architecture, with the codename Gemini Lake, and belongs to the Pentium (Goldmont Plus) generation. It is also built on a 14 nm process node at Intel's foundry, but the design philosophy is completely different. The cache layout for the Pentium is 56 KB of L1 cache per core and 4 MB of shared L2 cache, with no L3 cache listed in the database. The die size is smaller at 93 mm², and there is no transistor count recorded. The absence of L3 cache is a notable architectural difference, as the Pentium relies on a larger shared L2 cache instead.

The foundry is the same for both (Intel), and the process node is identical at 14 nm, so the performance difference comes down to the microarchitecture itself. Goldmont Plus was designed for low-power, efficient operation, and it shows in the benchmark results: the Pentium achieves higher scores with a lower TDP of 10 watts compared to the Core i7's 15 watts. The Core i7's Broadwell architecture, while more powerful per core in its day, appears to be less efficient and slower in these recorded tests. The integrated graphics also reflect the generational gap, with Intel HD 6000 on the Core i7 versus UHD Graphics 605 on the Pentium.

The memory controller differences are tied to the architecture as well. Broadwell supports DDR3, while Goldmont Plus supports DDR4, and the Pentium's memory bandwidth advantage of 38.4 GB/s versus 29.9 GB/s is a direct result of this newer memory interface. The PCIe lane count is lower on the Pentium (6 lanes versus 12 lanes), which is typical for a low-power Gemini Lake part, but this does not appear to impact the CPU benchmark scores. Overall, the architecture differences explain the consistent 13.7 percent performance gap: the newer Goldmont Plus design delivers more work per clock and per watt than the older Broadwell design.