Intel Core i5-8600 vs Intel Core i5-9500T Comparison

The Intel Core i5-9500T and Intel Core i5-8600 are both six-core, six-thread desktop processors built on the same 14 nm Coffee Lake architecture and sharing the same 9 MB of L3 cache. The data, however, shows a clear performance hierarchy: the i5-8600 wins every single head-to-head benchmark in the comparison, from multi-core rendering to single-core bursts. Yet the i5-9500T is not a simple downgrade; its dramatically lower 35 W TDP against the i5-8600's 65 W TDP positions it as a distinct product for thermally constrained systems, not a direct competitor. The benchmark scores reveal a consistent, narrow margin of victory for the i5-8600, typically around 2.5% to 2.8%, which suggests the i5-9500T's lower clocks are the primary differentiator rather than any architectural inefficiency.

Where Each One Wins

The head-to-head data is unambiguous: the Intel Core i5-8600 wins all six benchmark comparisons, covering Cinebench R15, R20, and R23 in both multi-core and single-core tests. This makes it the outright pick for any workload where raw compute throughput matters, such as video encoding, 3D rendering, or heavy multitasking. The i5-8600's multi-core advantage ranges from 2.6% to 2.7% across the three Cinebench versions, while its single-core edge is slightly tighter at 2.5% to 2.8%. For users running these exact workloads, the i5-8600 provides a measurable, if modest, performance uplift in every scenario tested.

The Intel Core i5-9500T, by contrast, wins no benchmarks in this comparison. Its role is not about performance supremacy but about enabling a 35 W TDP in a desktop socket. The data shows it trails the i5-8600 by roughly 2.5% to 2.8% across all tests, which is a small penalty for a processor that consumes nearly half the power. This makes the i5-9500T the logical choice for small-form-factor builds, fanless designs, or systems where cooling and power budgets are strict. The benchmark results imply that the i5-9500T sacrifices only a few percentage points of performance to achieve that efficiency, which is a compelling trade-off for its intended use case.

Architecture Differences

Both processors share the same fundamental architecture: Coffee Lake on a 14 nm process, with six cores and six threads, 64 KB of L1 cache per core, 256 KB of L2 cache per core, and 9 MB of shared L3 cache. They also use the same Intel Socket 1151, support dual-channel DDR4 memory with a 42.7 GB/s bandwidth, and integrate UHD Graphics 630. The PCIe implementation is identical as well: Gen 3 with 16 lanes from the CPU. Neither supports ECC memory, and both have locked multipliers, meaning no overclocking.

The critical differences lie in clock speeds and power. The i5-8600 has a base clock of 3.10 GHz and a boost clock of 4.30 GHz, while the i5-9500T operates at a much lower 2.20 GHz base and 3.70 GHz boost. This 900 MHz base-clock and 600 MHz boost-clock gap directly explains the benchmark deltas. The i5-9500T also carries a 35 W TDP versus the i5-8600's 65 W TDP, a halving of power draw that necessitates the lower frequencies. Additionally, the i5-8600 has a specified die size of 154 mm², while the i5-9500T's die size is not listed in the data. The release dates are close, with the i5-8600 launching on 2018-02-13 and the i5-9500T on 2018-03-31, and both are now end-of-life products.

Head-to-Head Benchmarks

The benchmark data tells a consistent story of a small but decisive victory for the i5-8600. In Cinebench R15 multi-core, the i5-8600 scores 855 against the i5-9500T's 832, a 2.7% difference. The single-core R15 test shows a 120 to 117 result in favor of the i5-8600, a 2.5% margin. Moving to Cinebench R20, the multi-core gap remains at 2.6% (3564 vs 3470), while single-core widens slightly to 2.8% (503 vs 489). In the latest Cinebench R23, the multi-core scores are 8486 for the i5-8600 and 8264 for the i5-9500T, again a 2.6% difference, and single-core is 1198 vs 1166, a 2.7% gap.

These numbers are remarkably consistent across all six tests, with the deltaPct hovering between -2.5% and -2.8%. This uniformity suggests that the performance penalty for the i5-9500T is not workload-specific but rather a general consequence of its lower clock speeds. The i5-8600's advantage in Geekbench multi-core is also notable, though it is not part of the head-to-head table; the i5-8600 does not have a Geekbench single-core score listed, but its multi-core score of 4407 is absent from the head-to-head comparison, which only includes Cinebench tests. The i5-9500T's Geekbench multi-core score of 4407 and single-core of 1198 are listed, but the i5-8600's corresponding scores are not in the head-to-head data, so no direct comparison is possible there.

The Verdict

From the data alone, the Intel Core i5-8600 is the superior performer by every measurable benchmark in this comparison. It wins all six Cinebench tests with margins that, while small, are consistent and non-trivial for users who rely on rendering or CPU-bound tasks. The i5-8600's higher base and boost clocks translate directly into a 2.5% to 2.8% advantage across both single-core and multi-core workloads. For anyone building a desktop where performance is the sole criterion, the i5-8600 is the clear choice.

The Intel Core i5-9500T, however, serves a different purpose. Its 35 W TDP is a defining feature that allows it to fit into systems where the i5-8600's 65 W TDP would be impractical. The benchmark data shows that this efficiency comes at a cost of only about 2.6% performance on average, which is an excellent trade-off for thermally constrained environments. The i5-9500T also has a lower launch MSRP of $192 versus the i5-8600's $213, making it a more accessible option for those who prioritize power efficiency over peak performance. The data does not indicate that the i5-9500T is a "bad" processor; rather, it is a specialized one, and the i5-8600 is the general-purpose winner.

FAQ

Q: Which processor has a higher boost clock?

A: The Intel Core i5-8600 has a boost clock of 4.30 GHz, which is higher than the Intel Core i5-9500T's 3.70 GHz boost clock.

Q: How much faster is the i5-8600 in Cinebench R23 multi-core?

A: The i5-8600 scores 8486, while the i5-9500T scores 8264, giving the i5-8600 a 2.6% advantage in that test.

Q: Do both processors have the same amount of L3 cache?

A: Yes, both the Intel Core i5-9500T and the Intel Core i5-8600 have 9 MB of shared L3 cache.

Q: What is the TDP difference between the two chips?

A: The Intel Core i5-9500T has a TDP of 35 W, while the Intel Core i5-8600 has a TDP of 65 W.

Q: Are both processors unlocked for overclocking?

A: No, neither processor has an unlocked multiplier; both are locked.

Q: Which processor has a higher single-core score in Cinebench R20?

A: The i5-8600 scores 503 in Cinebench R20 single-core, compared to the i5-9500T's 489, a 2.8% difference.

Specification Differences

| Specification | Intel Core i5-9500T | Intel Core i5-8600 |

|---|---|---|

| Base Clock | 2.20 GHz | 3.10 GHz |

| Boost Clock | 3.70 GHz | 4.30 GHz |

| TDP | 35 W | 65 W |

| Die Size | Not listed | 154 mm² |

| Release Date | 2018-03-31 | 2018-02-13 |

| Launch MSRP | $192 | $213 |

| Part Number | SRF4D | SR3X0 |

| Generation | Core i5 (Coffee Lake Refresh) | Core i5 (Coffee Lake) |