Intel Core i5-4670K vs Intel Core i5-5675R Comparison

The Intel Core i5-4670K and Intel Core i5-5675R are both 4-core, 4-thread desktop processors, but they are separated by two generations of Intel architecture and target completely different sockets. The benchmark data shows a narrow but consistent victory for the i5-4670K across nearly every CPU workload, with the i5-5675R managing a single win in Geekbench multi-core. However, the i5-5675R brings a more advanced 14nm process, a lower 65W TDP, and a significantly stronger integrated GPU, making the choice less about raw compute and more about platform and graphics priorities.

Where Each One Wins

The i5-4670K is the clear winner for pure processor-bound tasks. It takes 7 of the 8 head-to-head benchmark comparisons, including every Cinebench test and Geekbench single-core. Its advantage is small but consistent, ranging from a 0.3% edge in Cinebench R23 single-core to a 5.5% lead in Geekbench single-core. For users running applications that rely heavily on single-threaded performance or lightly-threaded workloads, the i5-4670K is the better choice according to the data.

The i5-5675R wins only one test: Geekbench multi-core, with a score of 3738 versus 3700 for the i5-4670K, a 1% advantage. This single result suggests that in some mixed-thread workloads, the newer Broadwell architecture can edge ahead, but it is an isolated data point. The i5-5675R also holds a major advantage in integrated graphics, featuring Iris Pro Graphics 6200 compared to the HD 4600 in the i5-4670K, which makes it the better option for systems without a discrete GPU, even though this does not show up in the CPU benchmark scores.

Specification Differences

The two processors differ in several fundamental specifications. The i5-4670K has higher clock speeds: a base clock of 3.40 GHz and a boost clock of 3.80 GHz, compared to 3.10 GHz and 3.60 GHz for the i5-5675R. The i5-4670K also has a higher TDP at 84W versus 65W for the i5-5675R, indicating the latter is more power-efficient.

The sockets are incompatible: the i5-4670K uses Intel Socket 1150, while the i5-5675R uses Intel BGA 1364, meaning they require different motherboards. The i5-4670K has an unlocked multiplier for overclocking, while the i5-5675R is locked. Memory support is DDR3 dual-channel for both, but the i5-5675R lists a memory bandwidth of 29.9 GB/s, while the i5-4670K has no such figure in the data. The i5-5675R also has a launch MSRP of $265, while the i5-4670K has no launch MSRP listed.

Architecture Differences

The architectural gap is significant. The i5-4670K is built on the Haswell architecture using a 22 nm process node, with 1,400 million transistors on a 177 mm² die. The i5-5675R uses the newer Broadwell architecture on a 14 nm process node, with a slightly larger die size of 182 mm² and no transistor count listed in the data.

Cache configurations also differ. Both have 64 KB of L1 cache per core and 256 KB of L2 cache per core, but the i5-4670K has 6 MB of shared L3 cache, while the i5-5675R has only 4 MB of shared L3 cache. The integrated graphics differ as well: the i5-4670K comes with Intel HD 4600, while the i5-5675R features the more capable Iris Pro Graphics 6200. Both support PCIe Gen 3, but the i5-5675R specifies exactly 16 lanes (CPU only), while the i5-4670K just lists Gen 3.

Head-to-Head Benchmarks

The Cinebench results are remarkably close. In Cinebench R15 multi-core, the i5-4670K scores 478 against 476 for the i5-5675R, a 0.4% win. The single-core test is a tie at 67 points each, with the i5-4670K declared the winner due to a 0% delta. Moving to Cinebench R20, the i5-4670K again wins multi-core with 1995 versus 1987 (0.4%) and single-core with 281 versus 280 (0.4%). In Cinebench R23, the pattern holds: the i5-4670K scores 4751 against 4733 in multi-core (0.4%) and 670 against 668 in single-core (0.3%).

Geekbench tells a slightly different story. In Geekbench multi-core, the i5-5675R wins with 3738 against 3700 for the i5-4670K, a 1% difference. But in Geekbench single-core, the i5-4670K dominates with 1302 against 1234, a 5.5% margin — the largest single win in the entire head-to-head set. This suggests the i5-4670K has a clear advantage in single-threaded workloads, while the i5-5675R's only multi-core win hints at better thread scaling in certain applications.

Looking at the broader context, both processors sit at the 40th percentile of all CPUs. The i5-4670K has an average benchmark score of 1656, slightly above the i5-5675R's 1648. The nearest rivals for the i5-4670K include the Intel Xeon E-2124 (1658, -0.1%), AMD Ryzen 5 3550H (1653, 0.2%), Intel Core i7-4770HQ (1660, -0.2%), and Intel Core i7-4810MQ (1651, 0.3%). The i5-5675R's rivals are the Intel Core i7-4810MQ (1651, -0.2%), Intel Core i7-5700HQ (1645, 0.2%), AMD Opteron 6380 (1643, 0.3%), and AMD Ryzen 5 3550H (1653, -0.3%). This places both chips in a very tight competitive cluster, with no rival more than 0.3% away in either direction.

FAQ

Q: Which processor has the higher clock speed?

A: The Intel Core i5-4670K has a base clock of 3.40 GHz and a boost clock of 3.80 GHz. The Intel Core i5-5675R is lower, with a base of 3.10 GHz and a boost of 3.60 GHz.

Q: Can the Intel Core i5-5675R be overclocked?

A: No. The i5-5675R has a locked multiplier, while the i5-4670K has an unlocked multiplier, making the latter the only one of the two suitable for overclocking.

Q: What is the difference in integrated graphics?

A: The i5-4670K includes Intel HD 4600 graphics, while the i5-5675R features the more advanced Iris Pro Graphics 6200.

Q: How much L3 cache does each processor have?

A: The i5-4670K has 6 MB of shared L3 cache, while the i5-5675R has 4 MB of shared L3 cache.

Q: Which processor has a lower power draw?

A: The i5-5675R has a TDP of 65W, compared to 84W for the i5-4670K, making the Broadwell chip more power-efficient.

Q: In which benchmark does the i5-5675R outperform the i5-4670K?

A: The i5-5675R wins only Geekbench multi-core, scoring 3738 against 3700, a 1% advantage.

The Verdict

The data points to the Intel Core i5-4670K as the superior processor for raw CPU performance. It wins 7 out of 8 benchmarks, including all Cinebench versions and Geekbench single-core. The largest margin is a 5.5% lead in Geekbench single-core, which is significant for applications that depend on single-threaded performance. The i5-4670K also has a higher average benchmark score (1656 versus 1648) and sits in the same 40th percentile as its rival. Its unlocked multiplier and higher clock speeds make it the better choice for users who plan to overclock or prioritize compute performance.

The Intel Core i5-5675R should be chosen by users who need its specific advantages. It has a lower 65W TDP for more power-efficient builds, a newer 14nm process node, and a substantially better integrated GPU in the Iris Pro Graphics 6200. Its only benchmark win, Geekbench multi-core, shows it can keep up in some multi-threaded scenarios, but the 1% margin is negligible. The i5-5675R also has a launch MSRP of $265, which is the only price data available. For a system without a discrete graphics card, the i5-5675R's integrated graphics are a clear benefit, but for pure processor performance, the i5-4670K wins decisively.