AMD Ryzen 3 4300U vs Intel Core i5-5675C Comparison

The Intel Core i5-5675C and AMD Ryzen 3 4300U are both 4-core, 4-thread processors, yet they represent fundamentally different design philosophies and eras. The data shows a split decision: the Intel chip wins the newer Cinebench R23 multi-core test and both Geekbench tests, while the AMD chip dominates the Cinebench R15 tests and the R23 single-core test. With a 41st percentile ranking for both against all CPUs and near-identical average benchmark scores (1759 for Intel vs. 1742 for AMD), the choice between them hinges entirely on which workloads matter most. The Intel Core i5-5675C is the pick for sustained multi-threaded rendering and general-purpose computing, while the AMD Ryzen 3 4300U is the pick for single-thread responsiveness and older benchmark suites.

The Verdict

The benchmark data does not crown a single overall winner; it declares a tie on wins (3-3) with a razor-thin average score margin. The Intel Core i5-5675C holds a 1% advantage in average benchmark score (1759 vs. 1742), placing it in the same performance tier as its nearest rival, the Intel Xeon E3-1241 v3, which it edges out by 0.2%. The AMD Ryzen 3 4300U sits exactly level with the Intel Core i3-10100 (0% deltaPct), showing it trades blows with a modern entry-level desktop chip.

Strictly from the data, users should pick the Intel Core i5-5675C if their priority is multi-core rendering in the Cinebench R23 workload, where it posts a 37.6% advantage (4912 vs. 3571). It also wins the Geekbench multi-core test by 9.5% (4159 vs. 3798) and the Geekbench single-core test by 8.4% (1388 vs. 1281). Conversely, the AMD Ryzen 3 4300U is the clear choice for single-threaded tasks, as it leads by 35.5% in Cinebench R23 single-core (1074 vs. 693) and by a massive 57.9% in Cinebench R15 single-core (163.9 vs. 69). The AMD chip also wins the older Cinebench R15 multi-core test by 12% (562.5 vs. 495). The verdict is workload-dependent: Intel for modern multi-core and Geekbench, AMD for single-core and legacy Cinebench tests.

Where Each One Wins

The Intel Core i5-5675C wins in 3 of the 6 head-to-head benchmarks. Its most significant victory is in Cinebench R23 multi-core, where the 4912 score is 37.6% higher than the AMD's 3571. This is the largest margin of victory in either direction across all tests, indicating a substantial advantage in sustained multi-threaded rendering workloads. The Intel chip also wins both Geekbench tests, with a 9.5% multi-core advantage (4159 vs. 3798) and an 8.4% single-core advantage (1388 vs. 1281). These wins suggest that in the Geekbench suite, the Intel architecture extracts more performance per clock, despite the AMD chip having a higher boost clock of 3.70 GHz versus 3.60 GHz.

The AMD Ryzen 3 4300U wins the other 3 benchmarks. Its most dominant victory is in Cinebench R15 single-core, where the 163.9 score is 57.9% higher than Intel's 69. This is a staggering lead that dwarfs any other difference. The AMD chip also wins Cinebench R15 multi-core by 12% (562.5 vs. 495) and Cinebench R23 single-core by 35.5% (1074 vs. 693). The pattern is clear: the AMD chip excels in the Cinebench family, particularly in single-core tests, while the Intel chip shows its strength in Geekbench and the newer R23 multi-core test. Users running older Cinebench R15 benchmarks will see a clear AMD advantage, while those using Geekbench will favor Intel.

Architecture Differences

The two processors come from different foundries and process nodes. The Intel Core i5-5675C uses a 14 nm process from Intel, while the AMD Ryzen 3 4300U uses a 7 nm process from TSMC. The AMD chip integrates 9,800 million transistors on a 156 mm² die, whereas the Intel chip has a die size of 182 mm² with no transistor count listed. These differences explain the power characteristics: the Intel chip has a 65 W TDP, while the AMD chip is rated at just 15 W, reflecting its mobile design and more efficient process node.

The cache configurations differ in the L2 cache. Both share 64 KB of L1 per core and 4 MB of shared L3 cache, but the Intel chip has 256 KB of L2 per core, while the AMD chip has 512 KB of L2 per core. This doubles the L2 capacity for the AMD chip, which can improve performance in certain workloads that fit within the faster L2 cache. Memory support also diverges: the Intel chip supports DDR3 with dual-channel memory and a bandwidth of 25.6 GB/s, while the AMD chip supports DDR4 and LPDDR4 with dual-channel memory and a bandwidth of 51.2 GB/s, exactly double the Intel figure.

The platform and feature sets differ significantly. The Intel chip uses the Intel Socket 1150 and is a desktop part with 16 PCIe Gen 3 lanes (CPU only), while the AMD chip uses the AMD Socket FP6 and is a mobile part with PCIe Gen 3 (lane count not specified). The Intel chip has an unlocked multiplier, while the AMD chip is locked. Integrated graphics also differ: the Intel chip features Iris Pro Graphics 6200, while the AMD chip features Radeon Graphics 320SP. The Intel chip launched in 2015 with a launch MSRP of $276, while the AMD chip launched in 2020 with no launch MSRP listed. Both are marked as Active in production status.

FAQ

Q: Which processor has the higher boost clock?

A: The AMD Ryzen 3 4300U has a boost clock of 3.70 GHz, which is 0.10 GHz higher than the Intel Core i5-5675C's boost clock of 3.60 GHz. The Intel chip has a higher base clock of 3.10 GHz versus the AMD chip's 2.70 GHz.

Q: What is the performance gap in the Cinebench R23 multi-core test?

A: The Intel Core i5-5675C wins this test with a score of 4912, which is 37.6% higher than the AMD Ryzen 3 4300U's score of 3571. This is the largest performance gap in any head-to-head benchmark between the two.

Q: How do the two compare on the average benchmark score?

A: The Intel Core i5-5675C has an average benchmark score of 1759, while the AMD Ryzen 3 4300U has an average score of 1742. This puts the Intel chip 1% ahead on average, though both sit at the 41st percentile of all CPUs.

Q: Which chip has the better single-core Cinebench R15 performance?

A: The AMD Ryzen 3 4300U leads by a wide margin, scoring 163.9 versus the Intel Core i5-5675C's 69. This represents a 57.9% advantage for the AMD chip, the largest single-core delta in the entire comparison.

Q: What are the memory bandwidth differences?

A: The AMD Ryzen 3 4300U supports DDR4 and LPDDR4 memory with a bandwidth of 51.2 GB/s, exactly double the 25.6 GB/s of the Intel Core i5-5675C, which only supports DDR3. Both use dual-channel memory buses.

Q: Do both processors have the same core and thread counts?

A: Yes, both the Intel Core i5-5675C and the AMD Ryzen 3 4300U have 4 cores and 4 threads. They also share the same L1 cache size of 64 KB per core and the same shared L3 cache of 4 MB.

Head-to-Head Benchmarks

The largest win for the Intel Core i5-5675C comes in Cinebench R23 multi-core, where it scores 4912 against the AMD's 3571, a 37.6% lead. This is a decisive victory that suggests the Intel chip can sustain higher multi-threaded throughput in this modern rendering workload. The Intel chip also wins the Geekbench multi-core test with a score of 4159 versus 3798, a 9.5% margin, and the Geekbench single-core test with a score of 1388 versus 1281, an 8.4% margin. These Geekbench wins indicate that the Intel architecture is more efficient in this specific benchmark suite, despite the AMD chip having a higher boost clock.

The AMD Ryzen 3 4300U counters with its own set of decisive victories. The single-core Cinebench R15 test shows a 57.9% advantage for AMD (163.9 vs. 69), which is the most lopsided result in the entire comparison. The AMD chip also wins the Cinebench R23 single-core test by 35.5% (1074 vs. 693), showing that its single-core performance is consistently superior across Cinebench versions. In the Cinebench R15 multi-core test, the AMD chip scores 562.5 versus 495, a 12% advantage. This creates an interesting split: AMD dominates all Cinebench tests except R23 multi-core, while Intel dominates Geekbench and the R23 multi-core test.

The data reveals that the AMD Ryzen 3 4300U's single-core advantage is substantial and consistent, with leads of 57.9% and 35.5% in the two Cinebench single-core tests. However, the Intel Core i5-5675C's multi-core win in R23 is even larger in percentage terms (37.6%) than the AMD's multi-core win in R15 (12%). In the Geekbench suite, the Intel chip wins both tests by single-digit percentages (9.5% and 8.4%), showing a more modest but consistent edge. The overall picture is one of trade-offs: neither chip dominates across all metrics, and the choice depends heavily on which benchmark suite reflects the user's actual workload.

Specification Differences

The core and thread counts are identical (4 cores, 4 threads), but nearly every other specification differs. The Intel Core i5-5675C has a base clock of 3.10 GHz and a boost clock of 3.60 GHz, while the AMD Ryzen 3 4300U has a base clock of 2.70 GHz and a boost clock of 3.70 GHz. The TDP differs dramatically: the Intel chip is rated at 65 W, while the AMD chip is rated at 15 W. The sockets are incompatible: Intel Socket 1150 for the Intel chip versus AMD Socket FP6 for the AMD chip.

The process node and foundry differ: Intel uses a 14 nm process from its own foundry, while AMD uses a 7 nm process from TSMC. The AMD chip has 9,800 million transistors on a 156 mm² die, while the Intel chip has a 182 mm² die with no transistor count listed. Cache differences appear in the L2 cache, with the Intel chip having 256 KB per core and the AMD chip having 512 KB per core; both share 64 KB L1 per core and 4 MB shared L3. Memory support is different: the Intel chip uses DDR3 with a bandwidth of 25.6 GB/s, while the AMD chip uses DDR4/LPDDR4 with a bandwidth of 51.2 GB/s.

Other differences include the PCIe configuration (Intel: Gen 3, 16 lanes CPU only; AMD: Gen 3, unspecified lanes), integrated graphics (Iris Pro Graphics 6200 vs. Radeon Graphics 320SP), market segment (Desktop vs. Mobile), and release date (2015-05-14 vs. 2020-01-05). The Intel chip has an unlocked multiplier and a launch MSRP of $276, while the AMD chip has a locked multiplier and no launch MSRP listed. The part numbers also differ (SR2B6SR2FX vs. 100-000000085), as does the generation classification (Core i5 (Broadwell) vs. Ryzen 3 (Zen 2 (Renoir))).