Intel Core i5-4690 vs Intel Xeon D-1521 Comparison

The Intel Core i5-4690 and Intel Xeon D-1521 are remarkably close in raw benchmark performance, despite targeting entirely different market segments. The data shows the i5-4690 wins all six head-to-head Cinebench tests, but by margins of 0.6% or less—effectively a statistical tie in most workloads. The real differentiators are architectural: the Xeon D-1521 is a 14nm Broadwell part with 8 threads and ECC support, while the i5-4690 is a 22nm Haswell desktop chip with integrated graphics and higher clock speeds. Both CPUs sit at the 36th percentile among all tested processors, with average benchmark scores of 1375 and 1367 respectively.

FAQ

Q: Which processor has the higher multi-core Cinebench R23 score?

A: The Intel Core i5-4690 scores 4754 versus the Xeon D-1521's 4728, a margin of 0.5%. This is the largest multi-core gap in the head-to-head results, but it remains negligible for real-world performance.

Q: Do the two CPUs have identical single-threaded performance?

A: Nearly so. In Cinebench R15 single-core, both score exactly 67. In R20, the i5-4690 scores 281 versus 280 for the Xeon D-1521 (0.4% difference), and in R23 the gap is 671 versus 667 (0.6%). The i5-4690 edges ahead in every single-core test.

Q: What is the most significant architectural difference?

A: The Xeon D-1521 uses a 14nm process node versus 22nm for the i5-4690, and it supports 8 threads versus 4. The Xeon also has a larger shared L3 cache structure of 1.5 MB per core, while the i5 has 6 MB total shared L3.

Q: Which processor supports ECC memory?

A: Only the Xeon D-1521 supports ECC memory. The i5-4690 does not. The Xeon also supports both DDR3 and DDR4 memory, while the i5-4690 is limited to DDR3.

Q: How do the average benchmark scores compare?

A: The i5-4690 has an average benchmark score of 1375, while the Xeon D-1521 scores 1367. Both rank at the 36th percentile among all CPUs, and their nearest rivals are similarly matched—the i5-4690's closest competitor (i5-1030NG7) scores 1376, while the Xeon's closest (i7-3820QM) scores 1366.

Q: What are the TDP ratings for each?

A: The i5-4690 has a TDP of 84 watts, while the Xeon D-1521 draws only 45 watts. This makes the Xeon significantly more power-efficient despite nearly identical performance.

Architecture Differences

The two processors represent different generations and design philosophies from Intel. The i5-4690 is built on the Haswell architecture using a 22nm process node, while the Xeon D-1521 uses the Broadwell architecture on a 14nm node. This process shrink allows the Xeon to pack 3,200 million transistors into a 246 mm² die, compared to 1,400 million transistors in the i5-4690's 177 mm² die.

Core configuration differs significantly. Both have 4 physical cores, but the Xeon D-1521 supports Hyper-Threading, providing 8 threads total versus the i5-4690's 4 threads. The i5-4690 compensates with higher clock speeds: 3.40 GHz base and 3.80 GHz boost, versus 2.40 GHz base and 2.70 GHz boost for the Xeon. This clock advantage explains why the i5-4690 edges ahead in single-core tests despite the Xeon's architectural advantages.

Cache layouts are notably different. The i5-4690 uses a 6 MB shared L3 cache, while the Xeon D-1521 allocates 1.5 MB of L3 per core. Both have identical L1 (64 KB per core) and L2 (256 KB per core) configurations. The Xeon's per-core L3 allocation is typical of server-oriented designs that benefit from isolated cache partitions.

Memory support is a major divergence. The i5-4690 supports only DDR3 in dual-channel configuration, while the Xeon D-1521 supports both DDR3 and DDR4. The Xeon also includes ECC memory support, a critical feature for server workloads, and offers 24 PCIe Gen 3 lanes (CPU only) versus the i5-4690's standard Gen 3 PCIe implementation. The i5-4690 includes integrated Intel HD 4600 graphics; the Xeon has no integrated graphics at all.

Market positioning explains these choices. The i5-4690 is a desktop part on Intel Socket 1150, while the Xeon D-1521 uses Intel BGA 1667 and targets server/workstation applications. The Xeon was released later (October 2015 versus April 2014) and remains in active production, whereas the i5-4690's production status is not specified in the data.

Head-to-Head Benchmarks

The head-to-head results show a consistent but narrow victory for the i5-4690 across all six Cinebench tests. In Cinebench R15 multi-core, the i5-4690 scores 479 versus 476 for the Xeon D-1521, a 0.6% advantage. The R15 single-core test shows a perfect tie at 67 points each.

Cinebench R20 results follow the same pattern. The i5-4690 scores 1996 in multi-core versus 1985 for the Xeon (0.6% delta), and 281 versus 280 in single-core (0.4% delta). Cinebench R23 shows the i5-4690 at 4754 versus 4728 in multi-core (0.5%) and 671 versus 667 in single-core (0.6%).

The pattern is clear: the i5-4690 wins every test, but the largest margin is 0.6%. These differences fall well within typical run-to-run variance for benchmark testing. The Xeon's 8-thread advantage appears to be fully offset by the i5-4690's higher clock speeds—the i5 boosts 1.1 GHz higher than the Xeon, which compensates for the Xeon's extra threads.

For context, both CPUs perform at the 36th percentile of all tested processors. The i5-4690's nearest rivals include the i5-1030NG7 (average score 1376, delta -0.1%) and i7-3740QM (1378, -0.2%), placing it firmly in mid-range territory. The Xeon D-1521's nearest rivals include the i7-3820QM (1366, +0.1%) and Xeon E5-1410 v2 (1368, -0.1%), confirming its similar performance tier.

Specification Differences

The two processors differ in nearly every major specification category. The i5-4690 runs at 3.40 GHz base and 3.80 GHz boost, while the Xeon D-1521 is clocked lower at 2.40 GHz base and 2.70 GHz boost. TDP is a major differentiator: 84 watts for the i5 versus 45 watts for the Xeon.

Socket compatibility is entirely different: the i5-4690 uses Intel Socket 1150, while the Xeon D-1521 uses Intel BGA 1667. The architectures are Haswell versus Broadwell, with process nodes of 22nm versus 14nm. The Xeon has more transistors (3,200 million versus 1,400 million) and a larger die (246 mm² versus 177 mm²).

Thread count is the only advantage for the Xeon: 8 threads versus 4. The i5-4690 has integrated Intel HD 4600 graphics; the Xeon has none. Memory support differs: the i5 supports DDR3 only, while the Xeon supports both DDR3 and DDR4. ECC memory is available only on the Xeon.

The Xeon D-1521 offers 24 PCIe Gen 3 lanes (CPU only), while the i5-4690's PCIe configuration is not detailed beyond Gen 3 support. The Xeon has a part number (SR2DF) and an active production status, while the i5-4690 lacks both. The Xeon also carries a launch MSRP of $199, while the i5-4690 has no listed launch MSRP.

Where Each One Wins

The i5-4690 wins in raw benchmark performance across every test in the data. Its higher clock speeds deliver a consistent, if small, advantage in both single-core and multi-core Cinebench workloads. The i5-4690 is also the only one of the two with integrated graphics, making it a more complete package for desktop systems that do not use a discrete GPU.

The Xeon D-1521 wins in power efficiency and platform features. Its 45-watt TDP is less than half the i5-4690's 84-watt rating, making it suitable for dense, low-power server deployments. The Xeon's ECC memory support and dual DDR3/DDR4 compatibility make it the clear choice for data integrity-sensitive workloads. Its 8 threads provide better parallel processing capability in heavily threaded server applications, even if Cinebench does not show a decisive advantage.

The per-core L3 cache allocation on the Xeon (1.5 MB per core) may benefit workloads that exhibit cache locality per thread, while the i5-4690's shared 6 MB L3 could be more flexible for general-purpose desktop use. The Xeon's active production status and 24 PCIe Gen 3 lanes indicate it is designed for ongoing server integration, whereas the i5-4690 appears to be a legacy desktop part.

The Verdict

The benchmark data makes the i5-4690 the winner on pure performance, but the margins are so small that this victory is almost symbolic. With a 0.6% maximum delta across all tests, neither CPU offers a meaningful performance advantage over the other in Cinebench workloads. The i5-4690's higher clock speeds are fully offset by the Xeon's additional threads.

The real decision comes down to platform requirements. For a desktop build where integrated graphics, higher clock speeds, and a standard socket are priorities, the i5-4690 is the sensible choice. It wins every benchmark test and provides a complete package without needing a separate GPU.

For server or workstation deployments, the Xeon D-1521 is the only viable option. ECC memory support, DDR4 compatibility, lower power consumption, and an active production status make it suitable for environments where data integrity and energy efficiency matter more than a 0.5% Cinebench score difference. The Xeon's 8 threads and per-core L3 cache allocation also suggest better headroom for server-specific workloads not captured in these consumer-oriented benchmarks.

Users who need a drop-in desktop processor should choose the i5-4690. Users building or maintaining server infrastructure should choose the Xeon D-1521. The performance data says they are essentially equal; the platform features say the choice is already made for you.