Intel Core i7-3930K vs Intel Xeon E3-1285L v4 Comparison

The Intel Xeon E3-1285L v4 and the Intel Core i7-3930K represent two distinct eras of Intel design, yet they land in the same performance percentile. The Xeon is a 14 nm Broadwell part aimed at servers, while the i7 is a 32 nm Sandy Bridge-E desktop flagship. The recorded data shows a consistent, if narrow, victory for the older i7 across every benchmark, but the reasons behind that outcome and the contexts where each chip makes sense are worth examining.

Where Each One Wins

The benchmark results are unambiguous: the Intel Core i7-3930K wins all six recorded head-to-head tests. There is no single test where the Xeon E3-1285L v4 comes out ahead. The margins are small, ranging from 1% to 1.2%, but they are uniform across both single-core and multi-core workloads.

The i7-3930K’s advantage is rooted in its core count. It offers 6 cores and 12 threads, compared to the Xeon’s 4 cores and 8 threads. That 50% core advantage shows up in multi-threaded tests. In Cinebench R15 multi-core, the i7 scores 701 against the Xeon’s 693, a 1.1% gap. In Cinebench R20 multi-core, the i7 posts 2921 versus 2891, and in R23 multi-core, it reaches 6955 versus 6884. The i7 also holds a slight edge in single-core tests: 98 versus 97 in R15, 412 versus 407 in R20, and 981 versus 971 in R23.

The Xeon’s case is not about winning benchmarks; it is about efficiency and platform features. It consumes 65 W of TDP, exactly half of the i7’s 130 W. It includes integrated graphics (Intel Iris Pro P6300), which the i7 lacks entirely. It supports ECC memory, a feature absent on the i7. The Xeon also uses a smaller 14 nm process with a 160 mm² die, versus the i7’s 32 nm process and 435 mm² die. These are qualitative strengths that do not appear in the raw Cinebench scores but matter for specific deployments.

The i7’s wins are consistent, but they are not decisive. A 1% margin in any test is within noise for most workloads. The data suggests that for pure compute throughput, the i7 has a slight edge, but the Xeon’s architectural advantages make it a different kind of product.

The Verdict

The database indicates that the Intel Core i7-3930K is the faster processor in every recorded benchmark. If the decision is based solely on Cinebench scores, the i7 is the clear choice. It delivers higher numbers in single-core and multi-core tests, and its 12 threads provide more headroom for parallel workloads. The i7 also has an unlocked multiplier, allowing overclocking, while the Xeon is locked.

However, the Xeon E3-1285L v4 is not without merit. It matches the i7’s boost clock at 3.80 GHz, but it does so at half the TDP. For systems where power draw and heat dissipation are primary concerns, the Xeon is the better fit. Its integrated graphics remove the need for a discrete GPU in basic display scenarios, and ECC memory support is a requirement for certain server and workstation applications. The Xeon also uses a much newer 14 nm process, which contributes to its efficiency.

The i7-3930K is the choice for raw performance and overclocking headroom. The Xeon is the choice for low-power, ECC-capable, integrated-graphics systems that do not need the extra two cores. The data shows the i7 wins on performance, but the Xeon wins on efficiency. Neither is a universal recommendation; they target different use cases.

The i7’s 6-core design with 12 threads is a structural advantage that the Xeon cannot overcome despite its newer architecture. The Xeon’s 14 nm node does not translate into higher clocks, as both parts top out at 3.80 GHz. The result is a consistent, narrow win for the i7 across the board.

Head-to-Head Benchmarks

The most decisive margin appears in Cinebench R20 single-core, where the i7-3930K leads by 1.2%. The i7 scores 412, while the Xeon scores 407. This is the largest delta in the entire set. The i7 also leads by 1.1% in Cinebench R15 multi-core, with 701 versus 693. Every other test shows a 1% gap.

In Cinebench R23 multi-core, the i7 records 6955 against the Xeon’s 6884. That 71-point difference is the largest absolute gap, but the percentage is only 1%. The i7’s two extra cores and four extra threads explain this result. Similarly, Cinebench R20 multi-core shows 2921 versus 2891, a 30-point difference.

Single-core results are closer. In Cinebench R15, the i7 scores 98 versus 97, a single point. In R23, it is 981 versus 971, a 10-point gap. The i7’s single-core advantage is small but consistent, suggesting its architecture handles lightly threaded workloads slightly better despite being older.

The i7 also has additional Geekbench scores in its record, with 2991 multi-core and 617 single-core. The Xeon does not have corresponding Geekbench entries in the database. This is not a head-to-head comparison, but it adds context to the i7’s profile.

The pattern is clear: the i7 wins every test, but the margins are modest. The largest percentage lead is 1.2%, and the smallest is 1%. For users upgrading from similar-era hardware, this difference is unlikely to be perceptible in everyday use. The i7’s win is real but not dramatic.

FAQ

Q: Does the Intel Core i7-3930K outperform the Xeon in multi-core tests?

A: Yes. The i7 wins all three multi-core Cinebench tests: 701 versus 693 in R15, 2921 versus 2891 in R20, and 6955 versus 6884 in R23.

Q: Is the Xeon more power-efficient than the i7?

A: Yes. The Xeon has a 65 W TDP, while the i7 has a 130 W TDP. The Xeon also uses a 14 nm process, whereas the i7 uses a 32 nm process.

Q: Does the Xeon support ECC memory?

A: Yes, ECC memory is enabled on the Xeon. The i7 does not support ECC memory.

Q: Which processor has integrated graphics?

A: The Xeon includes Intel Iris Pro P6300 integrated graphics. The i7 has no integrated graphics.

Q: What is the core and thread count difference?

A: The Xeon has 4 cores and 8 threads. The i7 has 6 cores and 12 threads.

Q: Are the boost clocks the same?

A: Yes, both processors have a 3.80 GHz boost clock. The Xeon has a 3.40 GHz base clock, while the i7 has a 3.20 GHz base clock.

Architecture Differences

The two processors belong to different architectural generations. The Xeon E3-1285L v4 is based on Broadwell-DT, a 14 nm design with 1,400 million transistors on a 160 mm² die. The i7-3930K is based on Sandy Bridge-E, a 32 nm design with 2,270 million transistors on a 435 mm² die.

The process node difference is significant. The 14 nm node allows the Xeon to achieve its 65 W TDP with a smaller die, while the 32 nm node requires more power and space. The i7’s larger die accommodates more cores: 6 versus the Xeon’s 4. The i7 also has more L3 cache, with 12 MB shared, compared to the Xeon’s 6 MB shared.

The memory interfaces differ as well. The Xeon uses dual-channel DDR3 with a bandwidth of 29.9 GB/s. The i7 uses quad-channel DDR3 with a bandwidth of 51.2 GB/s. This gives the i7 a substantial theoretical memory bandwidth advantage, though the benchmark data does not isolate memory-bound workloads.

Both processors support PCIe Gen 3, but the i7 provides 40 lanes from the CPU, while the Xeon’s lane count is not specified in the record. The Xeon has integrated graphics, a feature absent on the i7. The i7 has an unlocked multiplier, while the Xeon is locked.

The Xeon supports ECC memory, making it suitable for error-correcting workloads. The i7 does not. The Xeon is classified as a server/workstation part, while the i7 is a desktop part. Both are end-of-life products, with the Xeon released in June 2015 and the i7 released in November 2011.

Specification Differences

The core counts differ: the Xeon has 4 cores and 8 threads, while the i7 has 6 cores and 12 threads. The base clocks are 3.40 GHz for the Xeon and 3.20 GHz for the i7, but both boost to 3.80 GHz. The Xeon has a 65 W TDP, the i7 has a 130 W TDP.

The Xeon uses Intel Socket 1150, while the i7 uses Intel Socket 2011. The process nodes are 14 nm for the Xeon and 32 nm for the i7. Transistor counts are 1,400 million for the Xeon and 2,270 million for the i7. Die sizes are 160 mm² for the Xeon and 435 mm² for the i7.

L3 cache is 6 MB shared on the Xeon and 12 MB shared on the i7. Both use DDR3 memory, but the Xeon is dual-channel with 29.9 GB/s bandwidth, while the i7 is quad-channel with 51.2 GB/s bandwidth. ECC memory is supported on the Xeon but not on the i7.

The Xeon includes Intel Iris Pro P6300 integrated graphics; the i7 has none. The Xeon is locked, while the i7 has an unlocked multiplier. The Xeon targets the server/workstation segment, the i7 targets desktop. The launch MSRP for the Xeon is $445, and for the i7 it is $583.