AMD Ryzen 5 6600U vs AMD Ryzen 5 7535U Comparison

The AMD Ryzen 5 6600U and AMD Ryzen 5 7535U are nearly identical on paper, sharing the same Zen 3+ architecture, 6 nm TSMC process, 6 cores, and 12 threads. Yet the benchmark data reveals a consistent, if modest, performance split between the two. The 6600U wins 11 of 17 head-to-head comparisons, while the 7535U takes 6. The average benchmark scores are close — 22897 for the 6600U versus 22791 for the 7535U — a difference of just 0.5%. This is a story of small margins, but those margins are not random; they cluster in specific workload types that hint at deeper architectural and power-delivery differences.

Head-to-Head Benchmarks

The 6600U's biggest victory comes in Cinebench R15 multi-core, where it scores 1493 against the 7535U's 1330, a 12.3% advantage. This is the largest delta in the entire comparison, and it suggests that the 6600U's sustained multi-threaded performance under this older rendering workload is substantially better. The gap narrows in Cinebench R23 multi-core, but the 6600U still leads with 9159.5 versus 8591, a 6.6% edge. Both Cinebench tests stress all cores heavily, so the 6600U's consistent lead here points to a real advantage in sustained all-core throughput.

Single-core results tell a similar story, though with smaller margins. In Cinebench R15 single-core, the 6600U scores 233 versus 225, a 3.6% lead. Geekbench single-core shows 1673 against 1602, a 4.4% edge for the 6600U. Cinebench R23 single-core is closer: 1456.5 versus 1414, just 3% apart. These are not overwhelming wins, but they are consistent — the 6600U is faster in every CPU-centric benchmark that measures raw compute.

The 7535U fights back in the Passmark suite, though its wins are narrow. It takes Passmark single-thread with 3203 versus 3132, a 2.2% lead — interesting, given that the 6600U wins Geekbench single-core. The 7535U also wins Passmark physics (839 versus 825, up 1.7%), Passmark integer math (62109 versus 61723, up 0.6%), and Passmark multithread (17039 versus 17026, up 0.1%). These are marginal gains, hovering near the noise floor of benchmarking. The 7535U's Passmark single-thread advantage is its most notable counterpoint to the 6600U's Geekbench win, suggesting the two chips trade blows depending on the test's specific instruction mix and memory access patterns.

Elsewhere, the 6600U holds narrow leads in data compression (201364 versus 200252, 0.6%), data encryption (12783 versus 12706, 0.6%), extended instructions (13356 versus 13187, 1.3%), and floating-point math (33991 versus 33971, 0.1%). The floating-point result is essentially a tie, as is random string sorting (21241 versus 21267, 0.1% for the 7535U). The pattern is clear: the 6600U dominates in rendering and synthetic compute workloads, while the 7535U's wins are confined to specific Passmark subtests where its higher boost clock of 4.55 GHz versus 4.50 GHz may provide a slight edge in short, single-threaded bursts.

Architecture Differences

Both processors are built on Zen 3+ using TSMC's 6 nm process, with a die size of 208 mm². The core configuration is identical: 6 cores, 12 threads, 64 KB of L1 cache per core, 512 KB of L2 per core, and 16 MB of shared L3. Memory support is also the same — DDR5, dual-channel, with 76.8 GB/s of bandwidth — and both use the AMD Socket FP7. The integrated graphics are the same Radeon 660M, and PCIe connectivity is Gen 4 with 20 lanes.

The key architectural difference lies in the codename and the TDP. The 6600U is part of the 6000 series, codenamed Rembrandt, while the 7535U belongs to the 7000 series, codenamed Rembrandt-R. The "R" suffix typically indicates a refresh, and here it comes with a higher thermal design power: the 7535U is rated at 28 watts, versus 15 watts for the 6600U. This is a significant divergence. The higher TDP should, in theory, allow the 7535U to sustain higher clocks for longer periods, yet the benchmark data shows the 6600U winning the majority of tests. This suggests that the 6600U's 15-watt rating may be a more efficient implementation, or that the 7535U's higher TDP is not translating into proportional performance gains in these specific workloads.

Another notable difference is ECC memory support. The 7535U lists ECC memory as true, while the 6600U lists it as false. This is a functional distinction that could matter for users running memory-sensitive tasks, though it does not appear in the benchmark scores. The base clocks are identical at 2.90 GHz, and the boost clocks differ by only 0.05 GHz (4.55 versus 4.50). The release dates also differ — the 7535U has a recorded release date of January 3, 2023, while the 6600U's release date is not provided — but this does not affect performance metrics.

The Verdict

The data is unambiguous: the AMD Ryzen 5 6600U is the faster processor in the majority of benchmarks. It wins 11 of 17 comparisons, including all Cinebench and Geekbench tests, which are the most widely recognized cross-platform CPU benchmarks. Its multi-core lead in Cinebench R15 (12.3%) and R23 (6.6%) is substantial enough to be noticeable in rendering and video encoding tasks. Its single-core lead in Geekbench (4.4%) and Cinebench R15 (3.6%) also makes it the better choice for lightly-threaded applications.

However, the 7535U is not without merit. Its Passmark single-thread score of 3203 versus 3132 (2.2% higher) suggests that in certain short, bursty workloads, it may feel slightly snappier. Its wins in Passmark physics and integer math, though small, indicate that it handles specific compute patterns marginally better. The higher TDP of 28 watts versus 15 watts is a double-edged sword: it may allow for more consistent performance in thermally unconstrained chassis, but it also means higher power consumption and potentially more heat, which is a critical consideration for mobile devices.

The average benchmark scores place both chips at the 76th percentile among all CPUs, and the 6600U's nearest rival, the Ryzen 5 2600X, is just 0.3% ahead in average score. The 7535U is 0.5% behind the 6600U in this metric. For users who prioritize raw compute performance, the 6600U is the clear winner. For those who value ECC memory support or prefer the 7000 series branding, the 7535U offers a trade-off that sacrifices measurable performance in most benchmarks.

FAQ

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

A: The AMD Ryzen 5 6600U wins all multi-core benchmarks. It leads by 12.3% in Cinebench R15 multi-core (1493 versus 1330) and by 6.6% in Cinebench R23 multi-core (9159.5 versus 8591).

Q: Does the 7535U win any benchmarks?

A: Yes, the 7535U wins 6 of 17 head-to-head comparisons, including Passmark single-thread (3203 versus 3132, 2.2% higher) and Passmark physics (839 versus 825, 1.7% higher).

Q: Are the core and thread counts the same?

A: Yes, both processors have 6 cores and 12 threads.

Q: What is the difference in thermal design power?

A: The 6600U has a TDP of 15 watts, while the 7535U has a TDP of 28 watts.

Q: Do both processors support ECC memory?

A: No. The 7535U lists ECC memory support as true, while the 6600U lists it as false.

Q: Which chip has a higher boost clock?

A: The 7535U boosts to 4.55 GHz, which is 0.05 GHz higher than the 6600U's 4.50 GHz boost clock.

Where Each One Wins

The AMD Ryzen 5 6600U is the winner for rendering, video encoding, and any application that scales across multiple cores. Its Cinebench R15 multi-core score of 1493 is 12.3% higher than the 7535U's 1330, and its Cinebench R23 multi-core lead of 6.6% reinforces this. It also wins every Geekbench test, making it the stronger choice for general-purpose computing, including office productivity and web browsing. The 6600U's consistent single-core wins in Cinebench and Geekbench mean it will feel faster in most everyday tasks.

The AMD Ryzen 5 7535U wins in Passmark single-thread performance, scoring 3203 versus 3132, which is a 2.2% advantage. This could translate to slightly faster response times in applications that are not heavily multi-threaded and rely on short, single-core bursts. Its Passmark physics win (839 versus 825, 1.7% higher) and integer math win (62109 versus 61723, 0.6% higher) suggest it handles certain simulation and calculation workloads marginally better. For users who require ECC memory support, the 7535U is the only option between the two, as the 6600U does not support it.

Specification Differences

The two processors differ in the following fields: the 6600U belongs to the 6000 series with codename Rembrandt, while the 7535U is in the 7000 series with codename Rembrandt-R. The 6600U has a TDP of 15 watts, whereas the 7535U has a TDP of 28 watts. The boost clock differs slightly: 4.50 GHz for the 6600U versus 4.55 GHz for the 7535U. ECC memory support is false for the 6600U and true for the 7535U. The 7535U has a recorded release date of January 3, 2023, while the 6600U's release date is not listed. The part numbers also differ: the 6600U is 100-000000536100-000000548, and the 7535U is 100-000000988(FP7)100-000000992(FP7r2). All other specifications — cores, threads, base clock, socket, architecture, process node, foundry, die size, cache, memory support, memory bus, memory bandwidth, PCIe, integrated graphics, market segment, and production status — are identical.