Intel Core i7-7740X vs Intel Xeon E5-4650 v3 Comparison

The Intel Xeon E5-4650 v3 and the Intel Core i7-7740X represent two very different philosophies for high-end Intel silicon: one is a twelve-core server workhorse from the Haswell era, while the other is a quad-core desktop flagship from the Kaby Lake generation. The benchmark data reveals a surprisingly consistent picture, with the older Xeon taking every single head-to-head victory in the Cinebench suite, despite its significantly lower clock speeds and older architecture. This makes for a compelling case study in how core counts and thread counts can outweigh raw clock speed in modern rendering workloads.

Head-to-Head Benchmarks

The most striking aspect of this comparison is the absolute consistency of the results. Across all six Cinebench tests, the Intel Xeon E5-4650 v3 wins, with a deltaPct that hovers remarkably close to 11.7% in every single instance. In the Cinebench R15 multicore test, the Xeon scores 928 against the Core i7-7740X's 831, a difference of 11.7%. The single-core R15 test tells a similar story, with the Xeon at 131 and the i7-7740X at 117, a 12% lead for the server chip. This is counterintuitive at first glance, because the i7-7740X has a base clock of 4.30 GHz and a boost of 4.60 GHz, while the Xeon is stuck at 2.10 GHz base and 2.80 GHz boost.

The pattern holds in newer test versions. In Cinebench R20, the Xeon's multicore score of 3869 eclipses the i7-7740X's 3465, again by 11.7%. The single-core R20 result is 546 versus 488, a margin of 11.9%. Moving to the rigorous Cinebench R23, the Xeon posts a multicore score of 9212 against the i7's 8250, and a single-core score of 1300 against 1164. Both deltas sit at exactly 11.7%. The data suggests that the Xeon's 12 cores and 24 threads are not just scaling well in multi-threaded tasks; they are somehow also delivering superior single-threaded performance in this specific benchmark suite, which is a surprising outcome given the i7's clock speed advantage.

One potential explanation for the Xeon's single-core lead is that the Cinebench workload, even in "single-core" mode, may benefit from the larger 30 MB shared L3 cache on the Xeon compared to the 8 MB shared L3 cache on the i7-7740X. The i7's higher clock speed cannot compensate for the Xeon's massive cache advantage and its older, but wider, Haswell architecture. The data is unambiguous: the Xeon wins all 6 benchmarks, leaving the i7-7740X with 0 wins in this head-to-head comparison. This is a decisive sweep that defies the expectation that a newer, faster-clocked desktop processor would at least win the single-threaded tests.

Where Each One Wins

Based strictly on the benchmark data, there is no workload category where the Intel Core i7-7740X comes out ahead. The Xeon E5-4650 v3 wins in both single-core and multi-core Cinebench tests, meaning it would be the better choice for rendering, video encoding, and even lightly-threaded tasks that rely on a single core's efficiency in this specific benchmark engine. The i7-7740X's only advantage in the fact pack is its unlocked multiplier, which allows for overclocking, but no overclocked benchmark scores are provided to quantify that potential benefit.

For users focused on Cinebench performance, the Xeon is the clear pick. Its 12 cores and 24 threads provide a substantial advantage in multi-threaded rendering, as evidenced by the 9212 versus 8250 R23 multicore score. The i7-7740X, with its 4 cores and 8 threads, is simply outclassed in this metric. However, it is worth remembering the i7-7740X has a Geekbench score in the fact pack (5246 multi-core, 1619 single-core) which is not present for the Xeon, so this comparison is limited to the Cinebench suite. The data suggests that for any workload represented by these benchmarks, the Xeon E5-4650 v3 is the superior processor.

FAQ

Q: Which processor is faster in multi-core Cinebench R23?

A: The Intel Xeon E5-4650 v3 is significantly faster, scoring 9212 compared to the Intel Core i7-7740X's 8250. This represents an 11.7% advantage for the Xeon.

Q: Does the Core i7-7740X win any benchmark in this comparison?

A: No. The head-to-head data shows the Xeon E5-4650 v3 winning all 6 benchmarks, with the Core i7-7740X recording 0 wins.

Q: How do the single-core scores compare?

A: The Xeon E5-4650 v3 wins all single-core tests. In Cinebench R23, it scores 1300 versus the i7-7740X's 1164, a lead of 11.7%. This is despite the i7's higher base and boost clock speeds.

Q: What is the average benchmark score difference between the two?

A: The Xeon E5-4650 v3 has an average benchmark score of 2664, while the Core i7-7740X has an average score of 2648. The Xeon is slightly ahead.

Q: Which processor has more cores and threads?

A: The Intel Xeon E5-4650 v3 has 12 cores and 24 threads. The Intel Core i7-7740X has 4 cores and 8 threads.

Q: Is the Core i7-7740X newer than the Xeon?

A: Yes. The Core i7-7740X was released on 2017-06-25, while the Xeon E5-4650 v3 was released on 2015-05-31.

Specification Differences

The specification sheets reveal fundamental differences in design philosophy. The Intel Xeon E5-4650 v3 is built on a 22 nm process node, while the Intel Core i7-7740X uses a more modern 14 nm node. The Xeon features 12 cores and 24 threads, compared to the i7-7740X's 4 cores and 8 threads. This core disparity is the core of their performance difference. Clock speeds also diverge sharply: the Xeon has a base clock of 2.10 GHz and a boost of 2.80 GHz, whereas the i7-7740X has a base of 4.30 GHz and a boost of 4.60 GHz.

The memory specifications also differ. While both support DDR4 memory and a Quad-channel memory bus, the Xeon has a listed memory bandwidth of 68.3 GB/s, a figure not provided for the i7-7740X. Crucially, the Xeon supports ECC memory (true), while the i7-7740X does not (false). The PCIe support also differs: the Xeon has "Gen 3, 40 Lanes(CPU only)" while the i7-7740X is simply listed as "Gen 3". The Xeon is a Server/Workstation part, while the i7-7740X is a Desktop part, and the Xeon's multiplier is locked, whereas the i7-7740X's multiplier is unlocked for overclocking.

Architecture Differences

The architectural gap between these two chips is significant. The Intel Xeon E5-4650 v3 is based on the Haswell architecture (codename Haswell-EP), while the Intel Core i7-7740X uses the Kaby Lake architecture (codename Kaby Lake-X). The Xeon's die size is 356 mm² and contains 2,600 million transistors, while the i7-7740X does not have these figures listed in the data. The Xeon features a 30 MB shared L3 cache, which is substantially larger than the i7-7740X's 8 MB shared L3 cache. Both share the same 64 KB L1 and 256 KB L2 cache per core. The Xeon's larger cache and higher core count are its defining architectural features, while the i7-7740X relies on a newer process node and higher clock speeds. The Xeon's memory bandwidth of 68.3 GB/s is a listed advantage over the i7-7740X, which has no memory bandwidth figure provided.

The Verdict

The data is unequivocal: for any workload represented by the Cinebench benchmarks, the Intel Xeon E5-4650 v3 is the superior processor. It wins every benchmark by a consistent margin of around 11.7%, despite being an older, lower-clocked part. Its 12 cores and 24 threads provide a massive advantage in multi-threaded rendering, and its larger cache appears to help it even win single-threaded tests. The Xeon also offers ECC memory support and a higher memory bandwidth (68.3 GB/s), making it a more robust platform for workstation and server environments.

The Intel Core i7-7740X, on the other hand, is a desktop processor with an unlocked multiplier, suggesting it is intended for overclocking enthusiasts. However, without overclocked benchmark data, its only theoretical advantage is its higher clock speed, which did not translate to a single win in this comparison. Its 4 cores and 8 threads are simply not enough to compete with the Xeon's 12 cores and 24 threads. The i7-7740X is a quad-core part from 2017, while the Xeon is a twelve-core part from 2015, and the benchmark results show that core count wins out. Users who prioritize Cinebench rendering performance should choose the Xeon E5-4650 v3. Users who specifically need an unlocked multiplier for overclocking would have to consider the Core i7-7740X, but the data offers no benchmark evidence to support that choice for performance gains. The Xeon E5-4650 v3 is the clear winner in this head-to-head analysis.