CPU Comparison
Intel Core i5-6500
Core i9-9980XE
PERFORMANCE BENCHMARKS
Analysis: Intel Core i5-6500 vs Intel Core i9-9980XE
The Verdict
The data presents an unambiguous hierarchy. The Intel Core i9-9980XE wins all 8 head-to-head benchmark comparisons, with margins ranging from 23.5% to 82.4%. The Core i5-6500, a 2015 quad-core Skylake part, is decisively outclassed by the 2018 18-core Skylake-X flagship. Neither chip holds a performance advantage in any measured test; the i9-9980XE is simply faster in every single metric, from single-threaded workloads to heavily parallelized rendering tasks.
For a user strictly evaluating these two processors, the choice is clear: the i9-9980XE is the superior part in absolute performance. The data shows no scenario where the i5-6500 wins a benchmark. However, the i9-9980XE carries a launch MSRP of $1979, and its 165W TDP versus the i5-6500's 65W TDP indicates a much higher power envelope. The i5-6500 remains a functional, low-power entry point, but the benchmark results show it is not competitive with the i9-9980XE. The i9-9980XE is the only choice if performance is the sole criterion.
Where Each One Wins
Based strictly on the benchmark data, there is no category where the Intel Core i5-6500 wins. The i9-9980XE claims victory in all 8 head-to-head tests. The i5-6500's only advantage is qualitative: a lower 65W TDP, a smaller 177 mm² die size, and an integrated GPU (HD Graphics 530) which the i9-9980XE lacks.
The i9-9980XE's victories are most pronounced in multi-threaded workloads. In Cinebench R23 multicore, it scores 26780 versus 4760, a delta of -82.2%. This pattern holds across all Cinebench versions (R15, R20, R23), with the i9-9980XE consistently delivering roughly 5.6 times the multicore score. The Geekbench multicore test shows a similar but slightly smaller gap: 11270 versus 3118, a -72.3% delta.
The single-threaded tests are closer but still favor the i9-9980XE. In Geekbench single-core, the i9-9980XE scores 1437 against the i5-6500's 1099, a -23.5% delta. This is the smallest margin in the entire comparison. Cinebench R23 single-core shows a larger gap: 3780 versus 672, a -82.2% delta. The i9-9980XE's higher boost clock of 4.50 GHz versus 3.60 GHz contributes to its single-threaded superiority, though the i5-6500's lower base clock (3.20 GHz) does not help its case.
Architecture Differences
Both processors are built on Intel's 14 nm process node and share the Skylake microarchitecture lineage, but they are fundamentally different designs. The i5-6500 is a Skylake mainstream chip with 4 cores and 4 threads, while the i9-9980XE is a Skylake-X HEDT (High-End Desktop) part with 18 cores and 36 threads. This core count difference is the primary driver of the performance gap.
The cache hierarchy differs significantly. The i5-6500 has 64 KB of L1 cache and 256 KB of L2 cache per core, with a shared 6 MB L3 cache. The i9-9980XE also has 64 KB of L1 cache per core, but its L2 cache is 1 MB per core, and its shared L3 cache is 24.75 MB. This larger cache allocation is consistent with the high-core-count design.
The memory subsystems are also distinct. The i5-6500 supports DDR4 in a dual-channel configuration with a memory bandwidth of 34.1 GB/s. The i9-9980XE supports DDR4 in a quad-channel configuration with a memory bandwidth of 85.3 GB/s. This 2.5x bandwidth advantage helps feed the i9-9980XE's additional cores.
The socket and platform differ as well. The i5-6500 uses Intel Socket 1151, while the i9-9980XE uses Intel Socket 2066. The i9-9980XE offers 44 PCIe Gen 3 lanes (CPU only) versus 16 lanes on the i5-6500. The i9-9980XE has an unlocked multiplier for overclocking; the i5-6500 is locked. The i5-6500 includes integrated HD Graphics 530; the i9-9980XE has no integrated graphics. The die size also reflects the complexity difference: 177 mm² for the i5-6500 versus 484 mm² for the i9-9980XE.
FAQ
Q: Is the Intel Core i9-9980XE faster than the Core i5-6500 in every benchmark?
A: Yes. The head-to-head data shows the i9-9980XE wins all 8 tests, with no wins recorded for the i5-6500. The deltas range from -23.5% in Geekbench single-core to -82.4% in Cinebench R15 single-core.
Q: How much faster is the i9-9980XE in multi-core workloads?
A: In Cinebench R23 multicore, the i9-9980XE scores 26780 versus 4760 for the i5-6500, a -82.2% delta. The Geekbench multicore test shows a -72.3% delta (11270 versus 3118).
Q: Does the i5-6500 have any advantages over the i9-9980XE?
A: Qualitatively, yes. The i5-6500 has a 65W TDP versus 165W for the i9-9980XE, a smaller die size (177 mm² versus 484 mm²), and integrated HD Graphics 530. The i9-9980XE has no integrated graphics. However, no benchmark advantage exists for the i5-6500.
Q: What is the difference in single-threaded performance?
A: The i9-9980XE wins all single-threaded tests. The smallest margin is in Geekbench single-core: 1437 versus 1099, a -23.5% delta. The largest is in Cinebench R23 single-core: 3780 versus 672, a -82.2% delta.
Q: What are the core and thread counts for each processor?
A: The i5-6500 has 4 cores and 4 threads. The i9-9980XE has 18 cores and 36 threads. Both are built on the 14 nm process.
Q: What memory configurations do they support?
A: Both support DDR4. The i5-6500 uses a dual-channel bus with 34.1 GB/s bandwidth. The i9-9980XE uses a quad-channel bus with 85.3 GB/s bandwidth.
Head-to-Head Benchmarks
The benchmark data is one-sided, but the margins vary significantly by workload type. The i9-9980XE's largest wins come in multi-threaded tests, where its 18 cores and 36 threads dominate. In Cinebench R15 multicore, the i9-9980XE scores 2699 against 479 for the i5-6500, a -82.3% delta. This is the largest multi-core margin in the entire comparison. The Cinebench R20 and R23 multicore tests show nearly identical deltas of -82.2%, with scores of 11247 versus 1999 and 26780 versus 4760, respectively.
The Geekbench multicore test shows a slightly smaller gap of -72.3%, with the i9-9980XE scoring 11270 against 3118. This suggests that Geekbench's workload scaling is less sensitive to core count than Cinebench's, but the i9-9980XE still wins decisively.
Single-threaded performance is where the gap narrows, but the i9-9980XE still wins every test. The Geekbench single-core score is the closest contest: 1437 versus 1099, a -23.5% delta. This is attributable to the i9-9980XE's higher boost clock of 4.50 GHz versus 3.60 GHz for the i5-6500. However, the Cinebench single-core tests show a much larger gap. Cinebench R15 single-core scores 380 versus 67, a -82.4% delta. Cinebench R20 single-core scores 1587 versus 282, a -82.2% delta. Cinebench R23 single-core scores 3780 versus 672, also a -82.2% delta. This pattern indicates that Cinebench's single-threaded workload is far more punishing to the i5-6500 than Geekbench's.
The i9-9980XE's absolute dominance is clear: it wins every benchmark, with deltas ranging from -23.5% to -82.4%. The i5-6500's only competitive moment is in Geekbench single-core, where it trails by less than a quarter. Everywhere else, the i9-9980XE is multiple times faster. For users seeking maximum performance, the data leaves no doubt.