Intel Core i5-8600T vs Intel Core i5-9600 Comparison

The Intel Core i5-8600T and Intel Core i5-9600 are both six-core, six-thread desktop processors built on the same 14 nm Coffee Lake architecture, but they are positioned for different workloads. The 8600T is a low-power part with a 35 W TDP, while the 9600 is a mainstream chip with a 65 W TDP. Benchmark results show a consistent, if modest, performance gap in favor of the 9600 across every tested workload, making the choice between them largely a question of power efficiency versus outright speed.

Head-to-Head Benchmarks

The Intel Core i5-9600 wins all six head-to-head benchmark comparisons, with the margin hovering around 4.3–4.4% in each test. In Cinebench R15 multi-core, the 9600 scores 820 against the 8600T’s 784, a 4.4% advantage. The single-core R15 result is similar: 115 versus 110, a 4.3% lead. Moving to Cinebench R20, the multi-core gap stays at 4.4% (3419 vs 3270), and the single-core test also shows 4.4% (482 vs 461). The newer Cinebench R23 workload repeats the pattern: multi-core scores 8141 for the 9600 and 7787 for the 8600T (-4.3%), while single-core is 1149 against 1099 (-4.4%).

The Geekbench results are not part of the head-to-head table, but the standalone data shows a larger divergence. The 8600T scores 4277 multi-core and 1278 single-core in Geekbench, while the 9600 does not have Geekbench scores listed in the FACT PACK. This means the Cinebench suite provides the only direct comparison, and it is remarkably consistent. Every deltaPct is between -4.3 and -4.4, indicating that the performance difference scales uniformly across both single-threaded and multi-threaded workloads. This uniformity suggests the gap stems from clock speed rather than any architectural quirk.

For context, the 8600T’s average benchmark score is 2383, placing it at the 48th percentile of all CPUs. Its nearest rival is the Intel Core i5-1038NG7, which scores 2398 (0.6% higher). The 9600’s average score is 2354, also at the 48th percentile, with its closest competitor being the Intel Xeon E3-1285 v6 at 2348 (0.3% lower). Both chips are effectively in the same performance tier, but the 9600 trades blows with different rivals. The 8600T is 0.4% ahead of the Xeon E-2234 (2374), while the 9600 is 0.9% behind that same Xeon. These rival deltas reinforce that the two i5s are more similar to each other than either is to the surrounding field.

Architecture Differences

Both processors share the Coffee Lake codename and use the 14 nm process node from Intel. They have identical core counts (6), thread counts (6), and cache hierarchies: 64 KB of L1 per core, 256 KB of L2 per core, and 9 MB of shared L3. Memory support is also the same: DDR4 in dual-channel mode with a 42.7 GB/s bandwidth, and neither supports ECC. Both use the Intel Socket 1151 and are end-of-life products. The integrated graphics are UHD Graphics 630 on both, and neither has an unlocked multiplier.

The key differences are clock speed, TDP, and die size. The 8600T has a base clock of 2.30 GHz and a boost clock of 3.70 GHz, while the 9600 runs at 3.10 GHz base and 4.50 GHz boost. That is a 0.8 GHz advantage in base clock and 0.8 GHz in boost for the 9600, which explains the consistent ~4.4% benchmark lead. The TDP gap is stark: 35 W for the 8600T versus 65 W for the 9600. This makes the 8600T a much lower-power part, likely intended for compact or thermally constrained systems.

The die size is listed as 154 mm² for the 8600T, while it is null for the 9600. The part numbers differ (SR3X3 for the 8600T, SR3X2 for the 9600), and the release dates are different: the 8600T launched in April 2018, while the 9600 came six months later in October 2018. The 9600 is labeled as part of the "Coffee Lake Refresh" generation, while the 8600T is simply "Coffee Lake." Despite that refresh label, the architecture and process node are unchanged, so the performance delta comes entirely from clocks and power envelope.

Where Each One Wins

The Intel Core i5-9600 is the clear winner in every benchmark category. It is faster in single-core and multi-core tests across all three Cinebench versions (R15, R20, R23). For users who prioritize raw throughput—whether in rendering, compilation, or general desktop responsiveness—the 9600 delivers a consistent 4.3–4.4% improvement. The data shows no workload where the 8600T comes out ahead; it has zero wins in the head-to-head comparison.

The 8600T’s advantage is not in performance but in efficiency. Its 35 W TDP is nearly half the 9600’s 65 W TDP. This makes the 8600T the better choice for systems where heat dissipation and power draw are critical, such as small-form-factor builds, silent PCs, or always-on servers. The lower TDP does not require a massive cooling solution, and the chip can still offer six cores for multi-threaded tasks, albeit at reduced clocks. The 9600, by contrast, demands more substantial cooling and power delivery but returns a modest speed bump.

In practical terms, the 9600 is the pick for a desktop user who wants maximum performance from a six-core part on the Socket 1151 platform. The 8600T is the pick for a builder who needs six cores in a low-power envelope and is willing to sacrifice roughly 4% performance to get it. Neither chip stands out in the broader market: both sit at the 48th percentile of all CPUs, and their average benchmark scores (2383 vs 2354) are within 1.2% of each other. The 8600T actually has a slightly higher average score than the 9600, which is notable given its lower clocks, but that figure includes Geekbench results that are not available for the 9600.

FAQ

Q: Which processor is faster in multi-core workloads?

A: The Intel Core i5-9600 wins all multi-core Cinebench tests. In Cinebench R23 multi-core, it scores 8141 versus the 8600T’s 7787, a 4.3% advantage. The R20 multi-core result is 3419 versus 3270 (4.4% faster).

Q: Is the single-core performance gap the same as multi-core?

A: Yes, the delta is nearly identical. In Cinebench R15 single-core, the 9600 leads by 4.3% (115 vs 110), and in R20 single-core, the lead is 4.4% (482 vs 461). The R23 single-core gap is also 4.4% (1149 vs 1099).

Q: What is the TDP difference between these two CPUs?

A: The 8600T has a TDP of 35 W, while the 9600 has a TDP of 65 W. This is the largest specification gap between them and explains the 8600T’s suitability for low-power builds.

Q: Are they based on the same architecture?

A: Yes, both use the Coffee Lake architecture on a 14 nm process, with the same 6 cores, 6 threads, and 9 MB of shared L3 cache. The 9600 is labeled as "Coffee Lake Refresh," but the underlying design is identical.

Q: Which chip has a higher boost clock?

A: The 9600 boosts to 4.50 GHz, while the 8600T boosts to 3.70 GHz. The base clocks are 3.10 GHz and 2.30 GHz, respectively.

Q: Do they support the same memory?

A: Yes, both support DDR4 in dual-channel mode with a memory bandwidth of 42.7 GB/s. Neither supports ECC memory.

Specification Differences

| Specification | Intel Core i5-8600T | Intel Core i5-9600 |

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

| Base Clock | 2.30 GHz | 3.10 GHz |

| Boost Clock | 3.70 GHz | 4.50 GHz |

| TDP | 35 W | 65 W |

| Die Size | 154 mm² | Not specified |

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

| Release Date | April 2018 | October 2018 |

| Part Number | SR3X3 | SR3X2 |

| Launch MSRP | $213 | Not specified |

The two chips share the same core count, thread count, cache layout, socket, memory support, PCIe configuration (Gen 3, 16 lanes), integrated graphics (UHD 630), and process node. The differences are confined to clocks, power envelope, die size, generation label, release timing, and part number. The 9600’s higher clocks and TDP make it the faster part, while the 8600T’s lower TDP and smaller die size (where listed) position it as the efficiency-focused option.