Intel Core i7-3930K vs Intel Xeon E3-1535M v5 Comparison

The Intel Core i7-3930K and the Intel Xeon E3-1535M v5 represent two distinct approaches to Intel processor design, separated by four years of architectural evolution. The 3930K is a high-power, unlocked desktop flagship from the Sandy Bridge-E era, while the Xeon E3-1535M v5 is a low-power, mobile workstation part built on Skylake. Despite their different lineages, benchmark data shows they land in nearly the same performance tier, though the nature of their performance differs in subtle ways.

Head-to-Head Benchmarks

In every benchmark recorded, the Intel Core i7-3930K emerges as the winner, though by a remarkably consistent and narrow margin. The largest victory for the 3930K comes in the Cinebench R20 single-core test, where it scores 412 against the Xeon’s 398, a delta of 3.5%. The same 3.5% advantage appears in the Cinebench R15 multi-core test, with the 3930K scoring 701 versus 677. This pattern of near-uniform 3.4% to 3.5% leads across all six head-to-head tests indicates a fundamental clock-speed advantage rather than any architectural superiority in raw IPC.

The multi-core results tell a similar story. In Cinebench R23 multi-core, the 3930K scores 6955 against the Xeon’s 6726, a 3.4% edge despite the 3930K having 6 cores and 12 threads versus the Xeon’s 4 cores and 8 threads. The Xeon’s newer Skylake architecture and higher IPC per clock nearly compensate for having two fewer physical cores and four fewer threads. The same dynamic plays out in Cinebench R15 multi-core, where the 3930K’s 701 beats the Xeon’s 677, and in Cinebench R20 multi-core, where the scores are 2921 versus 2824.

Single-core tests show even closer competition, which is expected given that both processors boost to similar frequencies. The 3930K’s boost clock is 3.80 GHz versus the Xeon’s 3.70 GHz, and this 100 MHz advantage translates almost directly into the observed 3.2% to 3.5% single-core deltas. In Cinebench R23 single-core, the 3930K scores 981 versus 949, a 3.4% lead. The Cinebench R15 single-core test shows 98 versus 95, a 3.2% margin. These results indicate that the Xeon’s architectural efficiency gains from Skylake are almost exactly offset by the 3930K’s higher operating frequencies.

There are no tests in which the Xeon E3-1535M v5 wins. The head-to-head record stands at 6 wins for the 3930K and 0 for the Xeon. However, the average benchmark scores tell a slightly different story. The 3930K’s average benchmark score is 1960, while the Xeon’s is 1945 — a difference of less than 1%. Both processors sit at the 44th percentile of all CPUs, meaning they perform better than 44% of the processors in the benchmark database. The 3930K’s nearest rivals include the Intel Xeon D-2712T (average score 1964, delta -0.2%) and the AMD Ryzen 5 PRO 3400GE (average score 1954, delta +0.3%). The Xeon’s nearest rivals include the Intel Xeon E3-1230 v5 (average score 1947, delta -0.1%) and the Intel Core i5-1035G7 (average score 1948, delta -0.2%). This places both chips in a crowded mid-range performance band where they trade blows with similarly-scoring modern parts.

FAQ

Q: Which processor has the higher single-core benchmark score?

A: The Intel Core i7-3930K wins every single-core test. It scores 98 versus 95 in Cinebench R15, 412 versus 398 in Cinebench R20, and 981 versus 949 in Cinebench R23. The margins range from 3.2% to 3.5% in favor of the 3930K.

Q: How do the multi-core scores compare?

A: The 3930K also wins all multi-core tests. It leads by 3.5% in Cinebench R15 (701 versus 677), by 3.4% in Cinebench R20 (2921 versus 2824), and by 3.4% in Cinebench R23 (6955 versus 6726).

Q: What is the average benchmark score for each processor?

A: The Intel Core i7-3930K has an average benchmark score of 1960, while the Intel Xeon E3-1535M v5 has an average of 1945. Both are at the 44th percentile of all CPUs.

Q: Does the Xeon E3-1535M v5 win any benchmark comparisons?

A: No. In the six head-to-head benchmarks recorded, the Xeon wins zero. The 3930K wins all six, with the smallest margin being 3.2% in Cinebench R15 single-core.

Q: How do these processors compare to their nearest rivals?

A: The 3930K is nearly identical in average score to the Intel Xeon D-2712T (1964, delta -0.2%) and the AMD Ryzen 5 2600H (1967, delta -0.3%). The Xeon E3-1535M v5 is closest to the Intel Xeon E3-1230 v5 (1947, delta -0.1%) and the Intel Core i7-9850HL (1941, delta +0.2%).

Q: Which processor has the higher boost clock?

A: The Intel Core i7-3930K has a boost clock of 3.80 GHz, while the Intel Xeon E3-1535M v5 boosts to 3.70 GHz. The base clocks are 3.20 GHz and 2.90 GHz respectively.

Architecture Differences

The architectural divide between these two processors is substantial. The Intel Core i7-3930K is built on the Sandy Bridge architecture, specifically the Sandy Bridge-E variant, using a 32 nm process node from Intel. It contains 2,270 million transistors on a 435 mm² die. The Xeon E3-1535M v5 employs the Skylake architecture (Skylake-H codename) on a 14 nm process, with 2,300 million transistors on a much smaller 122 mm² die. This process shrink allows the Xeon to pack a similar transistor count into roughly one-quarter the die area.

The 3930K features 6 cores and 12 threads, while the Xeon offers 4 cores and 8 threads. Both have identical per-core L1 cache at 64 KB and L2 cache at 256 KB per core. The L3 cache differs: the 3930K has 12 MB shared, while the Xeon has 8 MB shared. This 4 MB L3 advantage for the 3930K partially explains why it maintains a lead in multi-threaded workloads despite having fewer architectural improvements.

Memory architecture also differs significantly. The 3930K supports DDR3 memory in a quad-channel configuration with a theoretical bandwidth of 51.2 GB/s. The Xeon supports both DDR3 and DDR4 in a dual-channel configuration, yielding 34.1 GB/s of bandwidth. The Xeon’s lower bandwidth is a consequence of its mobile-oriented design, which prioritizes power efficiency over raw throughput.

The Xeon supports ECC memory, while the 3930K does not. The 3930K has an unlocked multiplier, enabling overclocking, while the Xeon’s multiplier is locked. The Xeon includes integrated graphics in the form of HD Graphics P530, whereas the 3930K has no integrated graphics. PCIe connectivity also differs: the 3930K provides Gen 3 with 40 lanes (CPU only), while the Xeon provides Gen 3 with 16 lanes (CPU only).

Specification Differences

The two processors differ across nearly every major specification category. The 3930K has 6 cores and 12 threads versus the Xeon’s 4 cores and 8 threads. Base clocks are 3.20 GHz for the 3930K and 2.90 GHz for the Xeon; boost clocks are 3.80 GHz and 3.70 GHz respectively. Thermal design power is dramatically different: the 3930K is rated at 130 W, while the Xeon is rated at 45 W.

The sockets are incompatible: the 3930K uses Intel Socket 2011, while the Xeon uses Intel BGA 1440. The 3930K is a desktop part, while the Xeon is designated for the server/workstation market segment. Process nodes differ (32 nm versus 14 nm), as do die sizes (435 mm² versus 122 mm²). The 3930K uses quad-channel DDR3 memory, while the Xeon uses dual-channel DDR3/DDR4. The 3930K has no integrated graphics and no ECC support; the Xeon has both. The 3930K has an unlocked multiplier; the Xeon does not.

The L3 cache differs: 12 MB shared on the 3930K versus 8 MB shared on the Xeon. PCIe lanes differ: 40 versus 16. Release dates are separated by nearly four years: the 3930K launched on November 13, 2011, while the Xeon launched on October 26, 2015. The part numbers are SR0GWSR0KY for the 3930K and SR2FM for the Xeon.

The Verdict

The benchmark data paints a clear picture: the Intel Core i7-3930K outperforms the Intel Xeon E3-1535M v5 in every recorded test, but only by margins of 3.2% to 3.5%. The 3930K’s advantage stems from its higher base and boost clocks, larger L3 cache, and additional cores and threads. The Xeon’s newer Skylake architecture and smaller process node do not translate into a performance win; they instead deliver comparable performance at a fraction of the power draw — 45 W versus 130 W.

Users who prioritize raw multi-threaded performance, as measured by Cinebench scores, should favor the 3930K. Its 6-core, 12-thread configuration with 12 MB of L3 cache provides a consistent edge in all multi-core workloads. Those who need ECC memory support, integrated graphics, or a low-power mobile form factor would be forced to choose the Xeon, as the 3930K lacks all three. The Xeon’s dual-channel memory configuration and 16 PCIe lanes also make it more suitable for compact, power-constrained systems.

The 44th percentile ranking for both chips indicates they are mid-pack performers in the broader CPU landscape. The 3930K’s nearest rival, the Intel Xeon D-2712T, scores within 0.2% of it, while the Xeon’s closest competitor, the Intel Xeon E3-1230 v5, sits within 0.1%. Neither chip is a performance leader in 2025 terms, but the 3930K holds a narrow, consistent advantage over the Xeon in every benchmark recorded. For a desktop user seeking maximum compute throughput from an older platform, the 3930K is the data-supported choice. For a mobile workstation requiring ECC and low power, the Xeon is the only option that fits.