Intel Core i9-9900KF vs Intel Xeon W-1290E Comparison

The Intel Xeon W-1290E and Intel Core i9-9900KF are both 14 nm Intel parts with a 95 W TDP, but they target entirely different market segments. The Xeon W-1290E is a server/workstation processor with ECC memory support and a locked multiplier, while the i9-9900KF is an end-of-life desktop chip with an unlocked multiplier and no integrated graphics. Benchmark data from the database shows the Xeon winning all six head-to-head Cinebench comparisons, with margins between 7.8% and 8%. The i9-9900KF does hold a slight clock speed advantage, but the Xeon’s two extra cores and larger L3 cache prove decisive in every recorded test.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Xeon W-1290E has 10 cores and 20 threads, while the Intel Core i9-9900KF has 8 cores and 16 threads. The Xeon’s 2-core lead translates into a consistent 8% advantage across all multi-core Cinebench tests.

Q: Does the Xeon W-1290E support ECC memory?

A: Yes, the Xeon W-1290E supports ECC memory, which is a key feature for workstation and server reliability. The Core i9-9900KF does not support ECC memory, making it less suitable for error-correcting workloads.

Q: What is the difference in boost clock speeds?

A: The Core i9-9900KF boosts to 5.00 GHz, which is 0.20 GHz higher than the Xeon W-1290E’s 4.80 GHz boost. Despite this clock speed deficit, the Xeon still wins every single-core benchmark in the head-to-head comparison.

Q: Which CPU has a higher average benchmark score?

A: The Xeon W-1290E has an average benchmark score of 4775, compared to 4652 for the Core i9-9900KF. The Xeon also sits at the 59th percentile of all CPUs, one percentile point higher than the i9-9900KF’s 58th percentile.

Q: Are both CPUs on the same manufacturing process?

A: Yes, both are built on Intel’s 14 nm process node and fabricated by Intel. However, they use different architectures: the Xeon uses Comet Lake, while the i9-9900KF uses Coffee Lake-R.

Q: Which CPU has a larger L3 cache?

A: The Xeon W-1290E has 20 MB of shared L3 cache, while the Core i9-9900KF has 16 MB of shared L3 cache. This 4 MB difference, combined with the extra cores, contributes to the Xeon’s multi-core performance lead.

Architecture Differences

The Xeon W-1290E and Core i9-9900KF diverge significantly in their underlying architectures despite sharing the same 14 nm process and Intel foundry. The Xeon W-1290E is built on the Comet Lake architecture and belongs to the Xeon generation, while the i9-9900KF uses the Coffee Lake architecture and falls under the Core i9 (Coffee Lake Refresh) generation. This architectural split explains several downstream differences in features and capabilities.

The Xeon’s Comet Lake design is paired with the Intel Socket 1200, whereas the i9-9900KF uses the older Intel Socket 1151. This means the two processors are not socket-compatible, and system builders must choose a platform based on the target CPU. The Xeon’s market segment is Server/Workstation, while the i9-9900KF is explicitly a Desktop part. The production status also differs: the Xeon is listed as Active, while the i9-9900KF is End-of-life.

Memory support is another major architectural divider. Both CPUs support DDR4 memory and use a dual-channel memory bus, but the Xeon W-1290E offers a higher memory bandwidth of 46.9 GB/s compared to the i9-9900KF’s 42.7 GB/s. More importantly, the Xeon supports ECC memory, which is a critical feature for error-prone workstation workloads, while the i9-9900KF does not. The Xeon also includes integrated graphics in the form of Intel UHD Graphics P630, whereas the i9-9900KF has no integrated graphics at all, a distinction reflected in the “KF” suffix.

The die sizes and cache hierarchies further underline the architectural differences. The Xeon has a die size of 206 mm², while the i9-9900KF is smaller at 180.3 mm². Both have 64 KB of L1 cache and 256 KB of L2 cache per core, but the shared L3 cache differs: 20 MB on the Xeon versus 16 MB on the i9-9900KF. The Xeon’s larger die and cache allocation are consistent with its workstation positioning, where additional cores and cache are prioritized over raw clock speed.

Other notable differences include the multiplier unlock status. The i9-9900KF has an unlocked multiplier, making it overclockable, while the Xeon W-1290E is locked. The PCIe configuration is identical for both CPUs: Gen 3 with 16 lanes (CPU only). The release dates also differ, with the i9-9900KF launching in January 2019 and the Xeon W-1290E arriving over a year later in May 2020.

The Verdict

The data points to the Intel Xeon W-1290E as the stronger performer in every recorded benchmark. Across six Cinebench tests, the Xeon wins all of them, with deltas ranging from 7.8% to 8%. This consistency suggests the Xeon’s architectural advantages, specifically its two additional cores and 4 MB of extra L3 cache, more than compensate for its lower boost clock. Users who prioritize multi-threaded workloads, ECC memory support, or integrated graphics should choose the Xeon W-1290E.

The Core i9-9900KF does have its own merits. It boosts to 5.00 GHz, which is 0.20 GHz higher than the Xeon, and it has an unlocked multiplier for overclocking. Its smaller 180.3 mm² die and lower launch MSRP of $488 (compared to the Xeon’s $552) may appeal to enthusiasts on a desktop platform. However, the i9-9900KF is end-of-life, lacks ECC support, and has no integrated graphics. For a new build, the Xeon’s active production status and superior benchmark results make it the more future-proof option.

The performance gap is modest but consistent. In Cinebench R23 multi-core, the Xeon scores 16510 versus 15292 for the i9-9900KF, an 8% lead. In single-core R23, the Xeon scores 2330 versus 2158, also an 8% lead. The i9-9900KF never wins a single head-to-head benchmark, so the choice is clear for pure performance: the Xeon W-1290E is the better CPU.

Specification Differences

The following fields differ between the Intel Xeon W-1290E and the Intel Core i9-9900KF:

• Cores: 10 (Xeon) vs 8 (i9-9900KF)
• Threads: 20 (Xeon) vs 16 (i9-9900KF)
• Base Clock: 3.50 GHz (Xeon) vs 3.60 GHz (i9-9900KF)
• Boost Clock: 4.80 GHz (Xeon) vs 5.00 GHz (i9-9900KF)
• Socket: Intel Socket 1200 (Xeon) vs Intel Socket 1151 (i9-9900KF)
• Architecture: Comet Lake (Xeon) vs Coffee Lake (i9-9900KF)
• Codename: Comet Lake (Xeon) vs Coffee Lake-R (i9-9900KF)
• Generation: Xeon (Comet Lake) vs Core i9 (Coffee Lake Refresh)
• Die Size: 206 mm² (Xeon) vs 180.3 mm² (i9-9900KF)
• L3 Cache: 20 MB shared (Xeon) vs 16 MB shared (i9-9900KF)
• Memory Bandwidth: 46.9 GB/s (Xeon) vs 42.7 GB/s (i9-9900KF)
• ECC Memory: Supported (Xeon) vs Not supported (i9-9900KF)
• Integrated Graphics: Intel UHD Graphics P630 (Xeon) vs None (i9-9900KF)
• Market Segment: Server/Workstation (Xeon) vs Desktop (i9-9900KF)
• Production Status: Active (Xeon) vs End-of-life (i9-9900KF)
• Release Date: 2020-05-12 (Xeon) vs 2019-01-07 (i9-9900KF)
• Launch MSRP: $552 (Xeon) vs $488 (i9-9900KF)
• Multiplier Unlocked: No (Xeon) vs Yes (i9-9900KF)
• Part Number: SRJFB (Xeon) vs SRG1ASRFAA (i9-9900KF)

Identical fields include the 14 nm process node, Intel as the foundry, DDR4 memory support, dual-channel memory bus, PCIe Gen 3 with 16 lanes (CPU only), and a 95 W TDP.

Head-to-Head Benchmarks

The head-to-head benchmark data shows a clean sweep for the Intel Xeon W-1290E across all six Cinebench tests. The largest margin is 8%, which appears in four of the six tests, while the smallest is 7.8% in Cinebench R15 single-core.

In Cinebench R15 multi-core, the Xeon scores 1664 against 1541 for the i9-9900KF, an 8% advantage. This result reflects the Xeon’s two extra cores and larger L3 cache, which directly benefit multi-threaded rendering tasks. The single-core R15 test shows a smaller gap: the Xeon scores 234 versus 217, a 7.8% delta. Notably, the Xeon wins this single-core test despite the i9-9900KF’s higher 5.00 GHz boost clock, indicating that architectural efficiency plays a role beyond raw clock speed.

Cinebench R20 multi-core continues the pattern, with the Xeon at 6934 and the i9-9900KF at 6422, again an 8% lead. The single-core R20 test shows the Xeon at 978 versus 906, a 7.9% delta. These results are consistent with the R15 data, suggesting a stable performance gap regardless of the workload generation.

The most demanding test, Cinebench R23 multi-core, sees the Xeon score 16510 against 15292 for the i9-9900KF, an 8% lead. Single-core R23 shows the Xeon at 2330 versus 2158, also 8%. The i9-9900KF’s best performance comes in single-core tests, but it still trails the Xeon by at least 7.8% in every case.

The Xeon’s average benchmark score of 4775 is 123 points higher than the i9-9900KF’s 4652. In the global percentile ranking, the Xeon sits at the 59th percentile, one point above the i9-9900KF’s 58th. The nearest rivals for the Xeon include the Intel Core i5-1350P (avg score 4776, 0% delta) and the AMD Ryzen 9 3950X (avg score 4807, -0.7% delta). The i9-9900KF’s nearest rivals include the Intel Core i9-10900F (avg score 4664, -0.3% delta) and the Intel Core i9-10900 (avg score 4614, 0.8% delta). These rival comparisons show both CPUs are positioned in a crowded mid-to-high performance tier, but the Xeon consistently edges out the i9-9900KF in direct measurements.