AMD Ryzen 5 7540U vs AMD Ryzen 7 8840U Comparison

The AMD Ryzen 5 7540U and AMD Ryzen 7 8840U are both 28-watt mobile processors built on the same TSMC 4 nm process, but they target different performance tiers within the Zen 4 architecture. The data shows a clear split: the Ryzen 7 8840U dominates in multi-threaded workloads, while the Ryzen 5 7540U holds a slight edge in certain single-threaded tests. Out of the 17 head-to-head benchmarks recorded, the Ryzen 7 wins 14, while the Ryzen 5 wins 3.

Head-to-Head Benchmarks

The most decisive victories for the AMD Ryzen 7 8840U come in computationally intensive multi-core tasks. In PassMark’s integer math test, the Ryzen 7 scores 85,740 against the Ryzen 5’s 60,152, a delta of -29.8% from the Ryzen 5’s perspective, meaning the Ryzen 7 is roughly 30% faster. Floating point math shows a similar gap: 48,820 versus 36,077, a 26.1% difference. These are the two largest performance deltas in the entire comparison.

Cinebench results reinforce this pattern. In Cinebench R23 multi-core, the Ryzen 7 scores 12,972, which is 20% higher than the Ryzen 5’s 10,383. The older Cinebench R15 multi-core test shows a 17.2% advantage for the Ryzen 7 (2,024 versus 1,676). Geekbench multi-core follows suit, with the Ryzen 7 at 9,610 and the Ryzen 5 at 7,956, a 17.2% gap. PassMark’s multithread score also favors the Ryzen 7 by 20.4% (23,346 versus 18,576).

Memory and data-intensive tasks further demonstrate the Ryzen 7’s lead. Data compression scores 267,525 for the Ryzen 7 against 211,581 for the Ryzen 5, a 20.9% difference. Data encryption shows a 21.8% advantage (16,072 versus 12,563). Random string sorting, which stresses memory access patterns, is 23% faster on the Ryzen 7 (32,158 versus 24,760). Extended instructions (SIMD workloads) show a 17.9% edge for the Ryzen 7 (18,654 versus 15,307). Physics simulation in PassMark is 18% faster on the Ryzen 7 (1,176 versus 964), and the prime number finding test shows a 15.4% advantage (78 versus 66).

The single-core picture is far closer, but it does not uniformly favor the Ryzen 7. In Geekbench single-core, the AMD Ryzen 5 7540U wins outright, scoring 2,083 versus 1,970 for the Ryzen 7, a 5.7% advantage. In PassMark’s single-thread test, the two are effectively tied: the Ryzen 5 scores 3,544 and the Ryzen 7 scores 3,543, a delta of 0%. Cinebench single-core results slightly favor the Ryzen 7, but by tiny margins: 266 versus 264 in R15 (-0.8%) and 1,703 versus 1,699 in R23 (-0.2%). These single-core numbers are within the noise of benchmark variance, except for the Geekbench result, which is a genuine if modest win for the Ryzen 5.

Architecture Differences

Both processors share the Zen 4 microarchitecture, the Phoenix/Hawk Point family lineage, and the identical 4 nm TSMC process node. The transistor count is the same at 25,000 million, and the die size is identical at 178 mm². The cache hierarchy is also identical: 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3. Memory support matches as well, with dual-channel DDR5 and a memory bandwidth of 89.6 GB/s. PCIe connectivity is the same: Gen 4 with 20 lanes from the CPU.

The core counts differ, which explains most of the multi-threaded performance gap. The Ryzen 5 7540U has 6 cores and 12 threads, while the Ryzen 7 8840U has 8 cores and 16 threads. That is a 33% increase in core count and thread count for the Ryzen 7. Clock speeds also differ: the Ryzen 5 has a base clock of 3.20 GHz and a boost clock of 4.90 GHz, while the Ryzen 7 runs at a base of 3.30 GHz and boosts to 5.10 GHz. The Ryzen 7 thus has a 0.10 GHz higher base and a 0.20 GHz higher boost.

The integrated graphics differ as well. The Ryzen 5 7540U ships with the Radeon 740M, while the Ryzen 7 8840U includes the Radeon 780M. The socket and packaging are not the same: the Ryzen 5 uses AMD Socket FP7, while the Ryzen 7 uses AMD Socket FP8, though the Ryzen 7 part numbers also list FP7r2 and FP7 variants. ECC memory support is present on the Ryzen 5 but absent on the Ryzen 7. The Ryzen 5 belongs to the 7000 series, while the Ryzen 7 is part of the 8000 series, with codenames Phoenix and Hawk Point respectively. The Ryzen 5 launched on 2023-05-02, while the Ryzen 7 launched on 2023-12-05, a gap of roughly seven months.

Where Each One Wins

The AMD Ryzen 7 8840U wins in every multi-threaded workload recorded. This includes all Cinebench multi-core tests, Geekbench multi-core, PassMark multithread, data compression, data encryption, extended instructions, prime number finding, floating point math, integer math, physics, and random string sorting. For users running video encoding, 3D rendering, software compilation, or heavy data processing, the Ryzen 7 is the clear choice. The benchmark data shows a consistent 15-30% advantage across these tasks, directly attributable to the two additional cores and higher boost clock.

The AMD Ryzen 5 7540U wins in two specific areas. First, Geekbench single-core, where it scores 2,083 versus 1,970, a 5.7% lead. This is the only benchmark where the Ryzen 5 has a non-trivial advantage. Second, the PassMark single-thread test, where it wins by a single point (3,544 versus 3,543), which is effectively a tie but still recorded as a win. For applications that are strictly single-threaded and do not scale with core count, the Ryzen 5 performs at parity with the Ryzen 7, and in the Geekbench test it is measurably faster. The data also shows the Ryzen 5 has a lower base and boost clock, so its single-core wins are not due to raw frequency but rather to other architectural characteristics or benchmark variance.

For integrated graphics, the Ryzen 7 has the superior Radeon 780M compared to the Ryzen 5’s Radeon 740M, though no separate graphics benchmarks are provided in the data.

FAQ

Q: Which processor is faster in multi-core workloads?

A: The AMD Ryzen 7 8840U wins all multi-core benchmarks. The biggest margin is in PassMark integer math, where it scores 85,740 versus 60,152, a 29.8% advantage. Cinebench R23 multi-core shows a 20% lead (12,972 versus 10,383).

Q: Is the Ryzen 5 7540U better in any benchmark?

A: Yes. The Ryzen 5 7540U wins Geekbench single-core with 2,083 versus 1,970, a 5.7% edge. It also wins PassMark single-thread by 1 point (3,544 versus 3,543), which is a statistical tie.

Q: Do the two CPUs have the same architecture?

A: Yes, both use Zen 4 architecture on a 4 nm TSMC process node. They share the same transistor count (25,000 million), die size (178 mm²), L1/L2/L3 cache sizes, DDR5 memory support, and 89.6 GB/s memory bandwidth.

Q: What is the core count difference?

A: The Ryzen 5 7540U has 6 cores and 12 threads. The Ryzen 7 8840U has 8 cores and 16 threads, which is 33% more cores and threads.

Q: Do they support ECC memory?

A: The Ryzen 5 7540U supports ECC memory. The Ryzen 7 8840U does not support ECC memory.

Q: What are the clock speed differences?

A: The Ryzen 5 7540U has a 3.20 GHz base and 4.90 GHz boost. The Ryzen 7 8840U has a 3.30 GHz base and 5.10 GHz boost.

Specification Differences

The only differing specifications between the two processors are as follows. The Ryzen 5 7540U has 6 cores and 12 threads, while the Ryzen 7 8840U has 8 cores and 16 threads. Base clocks are 3.20 GHz versus 3.30 GHz, and boost clocks are 4.90 GHz versus 5.10 GHz. The Ryzen 5 uses AMD Socket FP7, while the Ryzen 7 uses AMD Socket FP8, though the Ryzen 7 also lists FP7r2 and FP7 part numbers. The integrated graphics differ: Radeon 740M on the Ryzen 5 versus Radeon 780M on the Ryzen 7. ECC memory support is present on the Ryzen 5 but not on the Ryzen 7. The series differs (7000 series versus 8000 series), as do the codenames (Phoenix versus Hawk Point). The release dates differ: 2023-05-02 for the Ryzen 5 and 2023-12-05 for the Ryzen 7. The Ryzen 5 has two part numbers (100-000000957 for FP7r2 and 100-000000966 for FP7), while the Ryzen 7 has three (100-000001323 for FP7r2, 100-000001375 for FP7, and 100-000001312 for FP8).

The Verdict

The data makes the decision straightforward for multi-threaded workloads: the AMD Ryzen 7 8840U is the superior processor. It wins 14 of 17 benchmarks, with the largest margins in integer math (29.8%), floating point math (26.1%), and random string sorting (23%). The 8-core, 16-thread configuration with a 5.10 GHz boost clock consistently outperforms the 6-core, 12-thread Ryzen 5 across Cinebench, Geekbench, and PassMark multi-core tests. Users who run parallel workloads — rendering, compiling, data analysis — should choose the Ryzen 7 without hesitation.

The AMD Ryzen 5 7540U is only the better choice for a narrow set of single-threaded scenarios. Its Geekbench single-core score of 2,083 beats the Ryzen 7’s 1,970 by 5.7%, and it matches the Ryzen 7 in PassMark single-thread (3,544 versus 3,543). For applications that do not utilize more than one or two cores, the Ryzen 5 offers equal or slightly better performance at a lower core count. The Ryzen 5 also has ECC memory support, which the Ryzen 7 lacks, making it the more appropriate option for systems requiring error-correcting memory. The Ryzen 7’s Radeon 780M integrated graphics are a step up from the Radeon 740M, which matters for gaming or GPU-accelerated tasks without a discrete card.

Given the overall benchmark dominance, the Ryzen 7 8840U is the stronger processor for the vast majority of users. The Ryzen 5 7540U is a viable alternative only for those prioritizing single-thread performance in a specific benchmark or requiring ECC memory support. Both CPUs sit at the same 76th percentile in the global CPU ranking, and their average benchmark scores are nearly identical (24,188 for the Ryzen 5 versus 23,982 for the Ryzen 7), which reflects that the Ryzen 5’s single-thread wins offset some of the Ryzen 7’s multi-thread dominance in the aggregate. But for raw throughput and parallel processing, the Ryzen 7 is the clear winner.