AMD Ryzen 5 7520U vs Intel Core i7-3960X Comparison

# Head-to-Head Benchmarks

The AMD Ryzen 5 7520U dominates the Intel Core i7-3960X across most benchmark categories, winning 5 of 6 head-to-head comparisons. The single exception is Cinebench R23 multi-core, where the Intel part’s six-core, twelve-thread configuration delivers a decisive 28.2% advantage (7170 vs 5149). That win, however, is the only bright spot for the older Sandy Bridge-E flagship.

The most lopsided result comes in Geekbench single-core, where the AMD Ryzen 5 7520U scores 1185 against the Intel Core i7-3960X’s 657 — an 80.4% margin. This gap reflects the fundamental architectural chasm between a 2022 6nm Mendocino chip and a 2011 32nm Sandy Bridge-E processor. Cinebench R15 single-core tells a similar story, with the Ryzen 5 7520U ahead by 65.5% (168.8 vs 102). Even in Cinebench R23 single-core, where the gap narrows, the AMD part still leads by 15.7% (1171 vs 1012).

Multi-core results are more nuanced. In Cinebench R15 multi-core, the Ryzen 5 7520U wins 834 to 722, a 15.5% edge despite having only 4 cores and 8 threads versus the Intel’s 6 cores and 12 threads. Geekbench multi-core also favors the AMD chip, 3766 to 3193, a 17.9% margin. These results suggest that the Ryzen 5 7520U’s Zen 2 architecture extracts significantly more performance per thread than the aging Sandy Bridge design.

The Intel Core i7-3960X’s only multi-core triumph, Cinebench R23, is substantial but isolated. Its 7170 score versus 5149 for the AMD part represents a 28.2% advantage, likely due to its larger 15 MB shared L3 cache and higher 130W TDP enabling sustained all-core loads. Yet this does not offset the broader pattern: average benchmark scores are nearly identical (2046 for AMD vs 2037 for Intel, a 0.4% difference), placing both at the 45th percentile among all CPUs. The Ryzen 5 7520U edges ahead in average score, but the practical difference is negligible.

Notably, the Ryzen 5 7520U achieves these results with a 15W TDP, while the Intel Core i7-3960X consumes 130W — an 8.7x difference in thermal envelope. The data shows that architectural efficiency, not raw power, drives most of the wins.

# The Verdict

For anyone prioritizing modern single-threaded performance and energy efficiency, the AMD Ryzen 5 7520U is the clear choice. Its Geekbench single-core score of 1185 versus 657 for the Intel Core i7-3960X — an 80.4% advantage — makes it the superior processor for everyday applications, web browsing, and lightly threaded workloads. The Ryzen 5 7520U also wins in Cinebench R23 single-core (1171 vs 1012, +15.7%) and Cinebench R15 single-core (168.8 vs 102, +65.5%), reinforcing its dominance in single-thread scenarios.

For users with heavily multi-threaded workloads that scale beyond four cores, the Intel Core i7-3960X offers a meaningful edge in one specific test: Cinebench R23 multi-core, where it leads by 28.2% (7170 vs 5149). This suggests that sustained all-core rendering tasks could favor the Intel part, particularly given its 6-core/12-thread configuration and 15 MB L3 cache. However, this advantage does not extend to Cinebench R15 multi-core (where AMD wins 834 to 722) or Geekbench multi-core (where AMD wins 3766 to 3193).

The average benchmark scores tell an important story: both processors sit at the 45th percentile, with the AMD part averaging 2046 and the Intel part averaging 2037. This near-parity in overall performance, combined with the AMD’s 5-to-1 win count in head-to-head tests, suggests that the Ryzen 5 7520U is the more balanced processor. The Intel Core i7-3960X, now end-of-life and launched at $990 (state once as launch MSRP), offers no advantage beyond that single Cinebench R23 multi-core result.

Choose the AMD Ryzen 5 7520U for general-purpose use, mobile computing, and efficiency. Choose the Intel Core i7-3960X only if your specific workload is dominated by the type of sustained multi-threaded rendering that Cinebench R23 measures — and even then, the 130W TDP and end-of-life status warrant caution.

# FAQ

Q: Which processor has a higher single-core Geekbench score?

A: The AMD Ryzen 5 7520U scores 1185, which is 80.4% higher than the Intel Core i7-3960X’s 657.

Q: Does the Intel Core i7-3960X win any benchmark?

A: Yes, it wins Cinebench R23 multi-core with a score of 7170, beating the AMD Ryzen 5 7520U’s 5149 by 28.2%.

Q: How do their average benchmark scores compare?

A: The AMD Ryzen 5 7520U averages 2046, while the Intel Core i7-3960X averages 2037 — a 0.4% difference favoring the AMD part.

Q: What is the TDP difference between the two?

A: The AMD Ryzen 5 7520U has a TDP of 15W, while the Intel Core i7-3960X has a TDP of 130W.

Q: Which processor has more cores and threads?

A: The Intel Core i7-3960X has 6 cores and 12 threads, while the AMD Ryzen 5 7520U has 4 cores and 8 threads.

Q: What are the release dates for these processors?

A: The AMD Ryzen 5 7520U was released on 2022-09-19, while the Intel Core i7-3960X was released on 2011-11-13.

# Specification Differences

The AMD Ryzen 5 7520U and Intel Core i7-3960X differ fundamentally across nearly every specification. The AMD part offers 4 cores and 8 threads, while the Intel part provides 6 cores and 12 threads. Base clocks are 2.80 GHz for the AMD and 3.30 GHz for the Intel, but boost clocks favor the AMD at 4.30 GHz versus 3.90 GHz.

Thermal design power is a major differentiator: the AMD Ryzen 5 7520U is rated at 15W, while the Intel Core i7-3960X is rated at 130W. Sockets differ completely — AMD Socket FT6 for the former, Intel Socket 2011 for the latter. Memory support also diverges: the AMD part uses LPDDR5 with dual-channel configuration and 88.0 GB/s bandwidth, while the Intel part uses DDR3 with quad-channel configuration and 51.2 GB/s bandwidth.

PCIe capabilities differ sharply. The AMD Ryzen 5 7520U provides Gen 3 with 4 lanes (CPU only), whereas the Intel Core i7-3960X offers Gen 3 with 40 lanes (CPU only). The AMD part includes integrated Radeon 610M graphics; the Intel part has no integrated graphics. The AMD chip is still in active production, while the Intel chip is end-of-life. The Intel Core i7-3960X has an unlocked multiplier; the AMD Ryzen 5 7520U does not. Launch MSRP for the Intel part was $990; the AMD part has no listed launch MSRP.

# Architecture Differences

The architectural gap between these two processors spans over a decade of design evolution. The AMD Ryzen 5 7520U uses Zen 2 architecture (codename Mendocino) built on a 6nm process at TSMC, with a die size of 100 mm². The Intel Core i7-3960X uses Sandy Bridge architecture (codename Sandy Bridge-E) built on a 32nm process at Intel, with a die size of 435 mm² and 2,270 million transistors.

Cache hierarchies differ substantially. The AMD part features 64 KB L1 per core, 512 KB L2 per core, and 4 MB shared L3. The Intel part has 64 KB L1 per core, 256 KB L2 per core, and 15 MB shared L3. The Intel’s larger L3 cache likely contributes to its Cinebench R23 multi-core win, providing more room for working sets in multi-threaded rendering.

Memory architecture reflects their respective eras. The AMD Ryzen 5 7520U supports LPDDR5 with dual-channel memory bus and 88.0 GB/s bandwidth. The Intel Core i7-3960X supports DDR3 with quad-channel memory bus but only 51.2 GB/s bandwidth. Neither supports ECC memory. The AMD part’s newer memory technology offers a 72% bandwidth advantage, which helps explain its multi-core wins in Geekbench and Cinebench R15.

The Ryzen 5 7520U belongs to AMD’s 7000 series and Ryzen 5 (Zen 2 Mendocino) generation, while the Intel Core i7-3960X is part of the Core i7 Extreme (Sandy Bridge-E) generation. The Intel part’s unlocked multiplier and 40 PCIe lanes target enthusiast desktop builds, whereas the AMD part’s 4 PCIe lanes and 15W TDP target mobile efficiency.

# Where Each One Wins

The AMD Ryzen 5 7520U wins in every single-core benchmark category. Geekbench single-core shows an 80.4% advantage (1185 vs 657), Cinebench R15 single-core shows a 65.5% advantage (168.8 vs 102), and Cinebench R23 single-core shows a 15.7% advantage (1171 vs 1012). This makes the AMD part the clear choice for applications that depend on per-thread performance — web browsing, office productivity, legacy software, and any workload that cannot fully utilize multiple cores.

The AMD Ryzen 5 7520U also wins in two of three multi-core benchmarks. Geekbench multi-core (3766 vs 3193, +17.9%) and Cinebench R15 multi-core (834 vs 722, +15.5%) both favor the AMD part. These results indicate that the Zen 2 architecture’s efficiency, combined with LPDDR5 memory bandwidth of 88.0 GB/s, delivers superior multi-threaded performance in many scenarios despite having fewer cores.

The Intel Core i7-3960X wins exclusively in Cinebench R23 multi-core, with a 28.2% margin (7170 vs 5149). This specific test likely benefits from the Intel part’s 15 MB L3 cache and 6-core/12-thread configuration, which can sustain heavy all-core loads for extended periods. For users running Cinebench R23 or similar rendering workloads that scale linearly with core count, the Intel part offers a tangible advantage.

Overall, the AMD Ryzen 5 7520U is the more versatile processor, winning 83% of head-to-head benchmarks and matching the Intel part’s average score (2046 vs 2037). The Intel Core i7-3960X is a niche choice for multi-threaded rendering workloads that resemble Cinebench R23’s demands — but its 130W TDP, end-of-life status, and dated DDR3 memory architecture make it a difficult recommendation outside that specific use case.