Intel Core i5-9400F vs Intel Xeon Gold 6348 Comparison

The Intel Core i5-9400F and Intel Xeon Gold 6348 are both Intel processors, but they occupy opposite ends of the product spectrum. One is a 6-core desktop chip from 2019, the other a 28-core server powerhouse from 2021. The benchmark data reflects this chasm, with the Xeon Gold 6348 delivering a clean sweep across all six head-to-head Cinebench tests.

Head-to-Head Benchmarks

The Xeon Gold 6348 dominates every benchmark in the comparison, and the margin is consistently massive. In Cinebench R15 multi-core, the Xeon scores 4441 against the i5-9400F's 810, a delta of -81.8% from the i5's perspective. That means the Xeon is roughly 5.5 times faster in this test. The single-core R15 result tells a similar story: 626 for the Xeon versus 114 for the i5, again a -81.8% delta. The Xeon's advantage is not merely about core count; its per-thread performance is also far ahead.

Moving to Cinebench R20, the pattern holds. The Xeon Gold 6348 posts 18507 multi-core, dwarfing the i5-9400F's 3376. The single-core score of 2612 for the Xeon more than quintuples the i5's 476. The delta remains locked at -81.8% across all tests, which shows that the relative performance gap is consistent regardless of workload type. The most recent test in the suite, Cinebench R23, reinforces this: the Xeon scores 44066 multi-core and 6221 single-core, while the i5 manages 8040 and 1135, respectively.

These aren't close contests. The Xeon Gold 6348 is ahead by a factor of five in multi-threaded rendering and by a similar margin in single-threaded tasks. For the i5-9400F, there are no bright spots in this head-to-head. Its best result, a 1135 in R23 single-core, is less than one-fifth of the Xeon's 6221. The data shows a complete and unambiguous victory for the server chip.

Where Each One Wins

The Xeon Gold 6348 wins every benchmark category listed, so the use-case split is stark. The Xeon's 28 cores and 56 threads make it the obvious choice for heavily parallel workloads like Cinebench multi-core rendering, where its 44066 R23 score is over five times the i5's 8040. It also wins in single-threaded tasks, which is notable because the i5 has a higher base clock (2.90 GHz vs 2.60 GHz) and boost clock (4.10 GHz vs 3.50 GHz). The Xeon's architectural advantage overcomes the clock speed deficit.

The i5-9400F has no benchmark wins in this comparison. However, its data shows it is not without merit in a broader context. Its passmark single-thread score is 2428, and its geekbench single-core score is 1344. These are respectable numbers for a desktop part, and its 65W TDP suggests it is far easier to cool and power than the Xeon's 235W. In a purely practical sense, the i5 wins on efficiency and platform simplicity, but not on raw performance. The Xeon wins everywhere that performance is measured.

Architecture Differences

The two chips come from different architectural eras. The i5-9400F uses Coffee Lake, specifically the Coffee Lake Refresh generation, built on Intel's 14 nm process. The Xeon Gold 6348 uses Ice Lake-SP, a 10 nm design. This process shrink is a key reason the Xeon can pack 28 cores while maintaining competitive clock speeds. The i5's core count is 6 with 6 threads, lacking Hyper-Threading, while the Xeon offers 28 cores and 56 threads.

Cache hierarchies differ significantly. Both have 64 KB of L1 per core, but the L2 cache jumps from 256 KB per core on the i5 to 1 MB per core on the Xeon. The shared L3 cache is also vastly different: 9 MB on the i5 versus 42 MB on the Xeon. This larger cache pool helps the Xeon feed its many cores and handle larger working sets. The memory controllers also diverge. The i5 supports dual-channel DDR4 with 42.7 GB/s bandwidth, while the Xeon supports eight-channel DDR4 with 204.8 GB/s bandwidth. The Xeon also supports ECC memory, which the i5 does not. PCIe capabilities are generations apart: the i5 has PCIe Gen 3 with 16 lanes, while the Xeon has PCIe Gen 4 with 64 lanes.

Specification Differences

The most obvious difference is core and thread count: 6 cores/6 threads on the i5 versus 28 cores/56 threads on the Xeon. Base clocks are 2.90 GHz for the i5 and 2.60 GHz for the Xeon, but the boost clocks flip the advantage: 4.10 GHz for the i5 and 3.50 GHz for the Xeon. The TDP is a major separator, with the i5 at 65W and the Xeon at 235W. Sockets are incompatible: the i5 uses Intel Socket 1151, while the Xeon uses Intel Socket 4189.

Process node is 14 nm for the i5 and 10 nm for the Xeon. L2 cache is 256 KB per core on the i5 versus 1 MB per core on the Xeon. L3 cache is 9 MB shared on the i5 versus 42 MB shared on the Xeon. Memory bandwidth is 42.7 GB/s for the i5 versus 204.8 GB/s for the Xeon. ECC memory support is absent on the i5 and present on the Xeon. PCIe lanes are 16 on the i5 versus 64 on the Xeon, with Gen 3 versus Gen 4. The market segments differ: Desktop for the i5, Server/Workstation for the Xeon. The i5 is end-of-life, while the Xeon is active. Release dates are January 2019 for the i5 and April 2021 for the Xeon.

FAQ

Q: Which CPU is faster in single-core performance?

A: The Xeon Gold 6348 wins all single-core tests. In Cinebench R23 single-core, it scores 6221 versus the i5-9400F's 1135, a delta of -81.8%.

Q: How much more multi-core performance does the Xeon offer?

A: In Cinebench R23 multi-core, the Xeon scores 44066 while the i5 scores 8040. This represents a roughly 5.5x advantage for the Xeon, with a delta of -81.8%.

Q: Does the i5-9400F support ECC memory?

A: No. The i5-9400F does not support ECC memory, while the Xeon Gold 6348 does support ECC memory.

Q: What are the socket requirements for each CPU?

A: The i5-9400F uses Intel Socket 1151, while the Xeon Gold 6348 uses Intel Socket 4189. They are not interchangeable.

Q: Which processor has a higher boost clock?

A: The i5-9400F has a higher boost clock at 4.10 GHz, compared to the Xeon's 3.50 GHz. Despite this, the Xeon still wins every single-core benchmark.

Q: What is the memory bandwidth difference?

A: The Xeon supports eight-channel memory with 204.8 GB/s bandwidth, while the i5 supports dual-channel memory with 42.7 GB/s bandwidth.

The Verdict

The data is unambiguous: the Intel Xeon Gold 6348 is the vastly superior processor in every measured benchmark. It wins all six Cinebench tests by a consistent margin of 81.8%. If your workload is rendering, heavy multi-threaded computation, or anything that scales with core count, the Xeon's 28 cores and 56 threads obliterate the i5-9400F's 6 cores and 6 threads. The Xeon also wins in single-threaded performance, despite lower clock speeds, thanks to its newer 10 nm architecture and larger cache.

The i5-9400F is not without a role, but it is not a competitor to the Xeon. Its 65W TDP makes it a low-power option, and its 14 nm process is older, but it is entirely outclassed in performance. The i5's average benchmark score is 13041, and its percentile ranking is 68, while the Xeon's average is 12746 with a percentile of 67. These aggregate scores are close, but they are skewed by the fact that the i5 has many more benchmark entries, including PassMark tests, while the Xeon only has Cinebench results in this pack.

Choose the Xeon Gold 6348 if you need server-grade performance, ECC memory, eight-channel bandwidth, and 64 PCIe Gen 4 lanes. Choose the i5-9400F only if you are building a low-power desktop system on Socket 1151 and accept that it will be roughly five times slower in multi-core rendering. For any workload where performance matters, the Xeon is the only rational choice based on this data. The i5-9400F is end-of-life, while the Xeon remains an active product, further cementing the Xeon's position as the superior investment for serious compute tasks.