Intel Core i7-7800X vs Intel Xeon D-1587 Comparison

The Intel Xeon D-1587 and Intel Core i7-7800X occupy opposite ends of the hardware spectrum, yet benchmark data places them in a statistical dead heat. The Xeon D-1587, a 16-core server part on a BGA package, edges out the 6-core desktop i7-7800X in every single Cinebench test recorded, but the margins are consistently narrow. The average benchmark score for the Xeon is 3350, while the i7-7800X sits at 3333, a difference of just 0.5%. Both processors land in the 54th percentile of all CPUs, meaning they perform identically relative to the broader market.

Head-to-Head Benchmarks

The Xeon D-1587 wins all six head-to-head Cinebench comparisons, but never by more than 5.1%. In the multi-core tests, the pattern is remarkably uniform. In Cinebench R15 multi-core, the Xeon scores 1167 against the i7-7800X's 1113, a 4.9% advantage. That same 4.9% delta repeats in Cinebench R20 multi-core, where the Xeon posts 4865 versus 4638. The R23 multi-core test shows the same story: 11585 for the Xeon against 11044 for the i7-7800X.

Single-core results follow the identical trend. The Xeon leads Cinebench R15 single-core with 164 points versus 156, a 5.1% gap. In R20 single-core, the Xeon scores 686 against 654, another 4.9% margin. The R23 single-core test rounds out the sweep with 1635 for the Xeon and 1559 for the i7-7800X. The consistency of these deltas suggests the advantage comes from sustained throughput rather than any workload-specific strength.

The i7-7800X does have additional Geekbench results in the data, scoring 6144 multi-core and 1352 single-core, but no comparable Geekbench scores exist for the Xeon in the benchmark set. That absence means the head-to-head comparison relies entirely on Cinebench, where the Xeon's 16 cores and 32 threads overwhelm the i7's 6 cores and 12 threads in raw parallel output. Yet the i7's higher clock speeds — 3.50 GHz base and 4.00 GHz boost versus the Xeon's 1.70 GHz base and 2.30 GHz boost — close most of the gap.

Where Each One Wins

The Xeon D-1587's wins are narrow but universal across all recorded Cinebench tests. Its 65W TDP is less than half the i7-7800X's 140W, making it the clear choice for thermally constrained environments. The Xeon also supports ECC memory, which is absent on the i7. These factors point toward always-on server duty, where the extra cores and lower power draw matter more than the slight single-core edge.

The i7-7800X fights back with a much higher boost clock of 4.00 GHz, which explains why it stays within 5% of the Xeon despite having 10 fewer cores and 20 fewer threads. It uses a quad-channel memory bus with a rated bandwidth of 76.8 GB/s, while the Xeon is limited to dual-channel DDR3 or DDR4. The i7 is also multiplier-unlocked, allowing overclocking beyond its stock 4.00 GHz boost, something the locked Xeon cannot do. For a desktop user who values tweaking and high-frequency response, the i7-7800X offers flexibility the server chip lacks.

The socket situation reinforces the split. The Xeon uses Intel BGA 1667, a soldered package that cannot be upgraded or swapped. The i7-7800X uses Socket 2066, a standard LGA platform with replaceable processors. The i7's market segment is Desktop, while the Xeon targets Server/Workstation. The i7's production status is End-of-life, whereas the Xeon remains Active, suggesting long-term availability for the server part.

The Verdict

The data shows a near-tie in average performance, with the Xeon D-1587 holding a 0.5% edge in aggregate benchmark score. The Xeon wins every Cinebench test, but the i7-7800X has a higher boost clock, a quad-channel memory controller, and an unlocked multiplier. Choose the Xeon D-1587 if you need 16 cores and 32 threads in a 65W package with ECC support and an active production status. Choose the i7-7800X if you want a desktop processor on a replaceable socket with overclocking capability and higher raw clock speeds. The Xeon's launch MSRP was 1549. The i7's launch MSRP was $383.

The i7-7800X's 4.00 GHz boost clock gives it a per-core speed advantage that the benchmark scores do not fully capture. In single-threaded workloads, the Xeon's 2.30 GHz boost is a severe handicap, yet it still manages to beat the i7 in Cinebench R15, R20, and R23 single-core tests. This suggests the Xeon's architecture sustains higher effective frequencies or benefits from better memory latency characteristics in these specific workloads. The i7's quad-channel memory bandwidth is a clear theoretical win, but the Cinebench suite does not appear to stress that advantage heavily enough to overcome the Xeon's core count.

FAQ

Q: Which processor has a higher average benchmark score?

A: The Intel Xeon D-1587 has an average benchmark score of 3350, while the Intel Core i7-7800X scores 3333. The Xeon leads by 0.5%.

Q: What is the biggest performance gap between the two in any single test?

A: The largest delta is 5.1%, recorded in Cinebench R15 single-core, where the Xeon D-1587 scores 164 against the i7-7800X's 156.

Q: Does the i7-7800X win any benchmark comparisons?

A: No. In the head-to-head benchmark data, the Xeon D-1587 wins all 6 tests, with the i7-7800X recording 0 wins.

Q: Which processor supports ECC memory?

A: The Intel Xeon D-1587 supports ECC memory. The Intel Core i7-7800X does not.

Q: What are the core and thread counts for each processor?

A: The Xeon D-1587 has 16 cores and 32 threads. The i7-7800X has 6 cores and 12 threads.

Q: Which processor has a higher boost clock?

A: The Intel Core i7-7800X has a boost clock of 4.00 GHz. The Intel Xeon D-1587 has a boost clock of 2.30 GHz.

Architecture Differences

The two processors come from different Intel microarchitectures. The Xeon D-1587 is built on Broadwell, specifically the Broadwell-DE generation for dense server deployments. The i7-7800X uses Skylake-X, part of the Core i7 X-Series 7th Gen lineup. Both are manufactured on Intel's 14 nm process node, but the Xeon integrates 3,200 million transistors on a 246 mm² die, while the i7's transistor count and die size are not listed in the data.

Cache layouts differ significantly. The Xeon D-1587 has 64 KB of L1 cache per core and 256 KB of L2 cache per core, with a substantial 1.5 MB of L3 cache per core. The i7-7800X also has 64 KB of L1 per core but a larger 1 MB of L2 per core, paired with 8.25 MB of shared L3 cache. The Xeon's per-core L3 design means its 16 cores can each access 1.5 MB of dedicated L3, totaling 24 MB across the chip, while the i7 shares a smaller pool among fewer cores.

Memory architecture diverges sharply. The Xeon supports both DDR3 and DDR4 across a dual-channel memory bus, with no rated bandwidth listed. The i7-7800X supports only DDR4 but uses a quad-channel bus with a rated bandwidth of 76.8 GB/s. PCIe connectivity also differs: the Xeon provides Gen 3 with 24 lanes (CPU only), while the i7 provides Gen 3 with 28 lanes (CPU only). Neither processor includes integrated graphics.

Specification Differences

The most obvious difference is core count: the Xeon D-1587 has 16 cores and 32 threads, while the i7-7800X has 6 cores and 12 threads. Clock speeds are inverted relative to core counts. The Xeon runs at 1.70 GHz base and 2.30 GHz boost, while the i7 runs at 3.50 GHz base and 4.00 GHz boost. TDP reflects this: the Xeon draws 65W, the i7 draws 140W.

The socket and form factor are incompatible. The Xeon uses Intel BGA 1667, a soldered embedded package, whereas the i7 uses Intel Socket 2066, a standard desktop LGA socket. The Xeon's market segment is Server/Workstation, and it remains in Active production. The i7's market segment is Desktop, and it is End-of-life. The Xeon supports ECC memory; the i7 does not. The i7 has an unlocked multiplier, while the Xeon is locked. The Xeon's launch MSRP was 1549, and the i7's was $383.

Memory channels and bandwidth favor the i7. The Xeon operates on a dual-channel bus supporting DDR3 and DDR4, with no bandwidth figure provided. The i7 uses quad-channel DDR4 with a rated 76.8 GB/s bandwidth. PCIe lanes favor the i7 by a margin of 28 to 24, both Gen 3 and CPU-only. The Xeon's cache is distributed per core (1.5 MB L3 per core), while the i7 uses 8.25 MB of shared L3 cache.