AMD Ryzen 5 3400G vs Intel Core i7-3960X Comparison

The AMD Ryzen 5 3400G and the Intel Core i7-3960X represent two very different eras of desktop computing. The Ryzen 5 3400G is a modern 12 nm processor with integrated graphics, while the Core i7-3960X is a legacy 32 nm enthusiast part from Intel's Sandy Bridge-E generation. The recorded benchmark data shows a clear overall winner in the AMD processor, but the older Intel chip still holds a few structural advantages that matter for certain workloads. This analysis walks through the database entries for both CPUs, comparing their architecture, specifications, and measured performance across multiple benchmark suites.

FAQ

Q: Which processor has a higher average benchmark score?

A: The AMD Ryzen 5 3400G has an average benchmark score of 2059, while the Intel Core i7-3960X has an average score of 2037. The AMD part sits at the 46th percentile among all CPUs, and the Intel part at the 45th percentile.

Q: How many cores and threads does each CPU have?

A: The AMD Ryzen 5 3400G has 4 cores and 8 threads, while the Intel Core i7-3960X has 6 cores and 12 threads. Despite having fewer cores and threads, the AMD processor wins all head-to-head benchmark comparisons in the database.

Q: Which CPU includes integrated graphics?

A: The AMD Ryzen 5 3400G features a Radeon RX Vega 11 integrated graphics unit. The Intel Core i7-3960X has no integrated graphics listed in its specifications.

Q: What is the manufacturing process node for each chip?

A: The AMD Ryzen 5 3400G is fabricated on a 12 nm process, while the Intel Core i7-3960X uses a 32 nm process. The AMD chip is built by GlobalFoundries, and the Intel chip is built by Intel.

Q: What memory types do the two CPUs support?

A: The AMD Ryzen 5 3400G supports DDR4 memory with a dual-channel bus, providing a memory bandwidth of 46.9 GB/s. The Intel Core i7-3960X supports DDR3 memory with a quad-channel bus, providing a higher memory bandwidth of 51.2 GB/s.

Q: Which CPU has the higher boost clock speed?

A: The AMD Ryzen 5 3400G has a boost clock of 4.20 GHz, while the Intel Core i7-3960X has a boost clock of 3.90 GHz. The AMD chip also has a higher base clock at 3.70 GHz versus 3.30 GHz.

Where Each One Wins

The head-to-head benchmark table in the database records eight separate comparisons, and the AMD Ryzen 5 3400G wins all eight. The Intel Core i7-3960X does not win a single recorded benchmark test. However, that does not mean the Intel chip is without merit in specific usage scenarios. The data shows that the Core i7-3960X offers a larger shared L3 cache (15 MB versus 4 MB), a quad-channel memory bus, and a higher theoretical memory bandwidth (51.2 GB/s versus 46.9 GB/s). These features are not directly benchmarked in the provided tests, but they point to strengths in memory-heavy workloads that are not captured by the recorded suite.

The Ryzen 5 3400G wins on every single-core and multi-core test in the database, including Cinebench R15, R20, R23, and Geekbench. Its single-core advantage is particularly pronounced in Geekbench, where it leads by 67.6 percent. For general desktop use, office applications, and lightly threaded tasks, the AMD processor is clearly superior according to these measurements. The Intel chip's six physical cores and twelve threads give it a theoretical advantage in heavily parallel workloads, but the recorded multi-core scores do not reflect that advantage: the Ryzen 5 3400G still leads by 9.3 percent in Cinebench R15, R20, and R23 multi-core tests.

Architecture Differences

The two processors come from completely different architectural lineages. The AMD Ryzen 5 3400G uses the Zen+ architecture under the codename Picasso, belonging to the 3000 series and the Ryzen 5 generation. It is built on a 12 nm process at GlobalFoundries, with 4,940 million transistors on a die size of 210 mm². The Intel Core i7-3960X uses the Sandy Bridge architecture under the codename Sandy Bridge-E, belonging to the Core i7 Extreme generation. It is built on a 32 nm process at Intel, with 2,270 million transistors on a die size of 435 mm².

The transistor counts and die sizes tell a story of different design priorities. The AMD chip packs more than double the transistors into roughly half the die area, reflecting the density advantages of the newer 12 nm node. The Intel chip, with its older 32 nm process, uses a much larger physical die to house fewer transistors. The Ryzen 5 3400G has a smaller L3 cache (4 MB shared) but larger per-core L1 and L2 caches: 96 KB L1 per core and 512 KB L2 per core, versus 64 KB L1 per core and 256 KB L2 per core on the Intel chip. The Intel Core i7-3960X compensates with a much larger 15 MB shared L3 cache.

The AMD processor includes an integrated Radeon RX Vega 11 GPU, while the Intel chip has none. The Ryzen 5 3400G supports PCIe Gen 3, as does the Intel Core i7-3960X, but the Intel part lists 40 lanes for the CPU only. The AMD chip does not specify a lane count in the database. Memory support also diverges: the AMD part uses DDR4 with a dual-channel bus, while the Intel part uses DDR3 with a quad-channel bus. The Intel chip's memory bandwidth is slightly higher at 51.2 GB/s versus 46.9 GB/s, despite using an older memory standard.

Specification Differences

The specification table shows several key differences between the two CPUs. The AMD Ryzen 5 3400G has 4 cores and 8 threads, while the Intel Core i7-3960X has 6 cores and 12 threads. Base clocks differ: 3.70 GHz for the AMD chip versus 3.30 GHz for the Intel chip. Boost clocks also differ: 4.20 GHz versus 3.90 GHz. Thermal design power is a major differentiator: the AMD part is rated at 65 watts, while the Intel part is rated at 130 watts.

Socket compatibility is entirely different. The AMD Ryzen 5 3400G uses AMD Socket AM4, while the Intel Core i7-3960X uses Intel Socket 2011. The AMD chip's production status is listed as Active, and its release date is July 6, 2019. The Intel chip's production status is End-of-life, with a release date of November 13, 2011. The AMD part has a launch MSRP of $149, while the Intel part has a launch MSRP of $990. Both processors have an unlocked multiplier.

Cache configurations differ as well. The AMD chip has 96 KB of L1 cache per core, 512 KB of L2 cache per core, and 4 MB of shared L3 cache. The Intel chip has 64 KB of L1 cache per core, 256 KB of L2 cache per core, and 15 MB of shared L3 cache. Memory support shows the AMD part using DDR4 and the Intel part using DDR3, with dual-channel versus quad-channel buses respectively. ECC memory support is not available on either chip. The AMD chip includes the Radeon RX Vega 11 integrated GPU, while the Intel chip lists no integrated graphics.

Head-to-Head Benchmarks

The head-to-head data records eight benchmark comparisons, and the AMD Ryzen 5 3400G wins every single one. In Cinebench R15 multi-core, the AMD chip scores 789 against 722 for the Intel chip, a 9.3 percent lead. In Cinebench R15 single-core, the AMD chip scores 111 against 102, an 8.8 percent lead. The pattern repeats in Cinebench R20: multi-core scores are 3290 versus 3011 (9.3 percent), and single-core scores are 464 versus 425 (9.2 percent). Cinebench R23 shows the same 9.3 percent multi-core margin, with scores of 7835 versus 7170, and a 9.3 percent single-core margin, with scores of 1106 versus 1012.

The Geekbench results show the largest gaps. In Geekbench multi-core, the AMD Ryzen 5 3400G scores 3731 against 3193 for the Intel Core i7-3960X, a 16.8 percent advantage. In Geekbench single-core, the AMD chip scores 1101 against 657, a massive 67.6 percent lead. That single-core Geekbench result is the standout data point in the entire comparison, indicating a generational leap in per-thread performance that the older Sandy Bridge architecture cannot match.

The average benchmark scores from the nearest rivals provide context for both chips. The AMD Ryzen 5 3400G's nearest rivals include the Intel Core i3-10105T (average score 2058, a 0.1 percent difference), the Intel Core i7-8705G (2058, 0.1 percent), the AMD Ryzen 3 3100 (2055, 0.2 percent), and the Intel Xeon E3-1585 v5 (2067, -0.4 percent). The Intel Core i7-3960X's nearest rivals include the AMD Opteron 6386 SE (2038, 0 percent), the Intel Core i7-7700T (2039, -0.1 percent), the AMD Ryzen 5 4500U (2035, 0.1 percent), and the Intel Xeon E-2124G (2034, 0.2 percent). These figures place both CPUs in a similar performance band, though the AMD chip holds a slight edge in average score.

The Verdict

The recorded data points to a clear conclusion: the AMD Ryzen 5 3400G outperforms the Intel Core i7-3960X in every benchmark test included in the database. The AMD chip wins all eight head-to-head comparisons, with margins ranging from 8.8 percent in Cinebench R15 single-core to 67.6 percent in Geekbench single-core. Its average benchmark score of 2059 also edges out the Intel chip's 2037.

For users prioritizing single-threaded performance, modern memory support, integrated graphics, and power efficiency, the AMD Ryzen 5 3400G is the superior choice according to the measurements. Its 65 watt TDP is less than half the Intel chip's 130 watt TDP, and it includes a Radeon RX Vega 11 GPU for systems without a discrete graphics card. The AMD chip also has a higher base and boost clock, and it is built on a newer 12 nm process.

The Intel Core i7-3960X still has a role for specific use cases. Its 15 MB shared L3 cache and quad-channel DDR3 memory bus provide a memory bandwidth advantage (51.2 GB/s versus 46.9 GB/s) that could benefit certain bandwidth-intensive workloads, even though the recorded benchmarks do not show a performance win. Its six cores and twelve threads are more than the AMD chip's four cores and eight threads, but the multi-core benchmark results do not reflect a win for the Intel part. The Intel chip is also end-of-life, while the AMD chip is still active in production.

The verdict from the data is straightforward: the AMD Ryzen 5 3400G is the better performer in all recorded tests. The Intel Core i7-3960X retains niche advantages in cache size and memory bandwidth, but for general computing, rendering, and single-threaded tasks, the AMD chip wins decisively. Users with an existing Socket 2011 platform may still find the Intel chip functional, but new builds should favor the AMD processor based on these benchmark results.