Intel Core i5-6600T

The Intel Core i5-6600T is a low-power quad-core desktop processor from Intel's Skylake generation, released on July 1, 2015. It combines four physical cores with a 35W TDP, making it a candidate for compact and quiet systems. With a base clock of 2.70 GHz and a boost clock of 3.50 GHz, it sits in the lower portion of the performance spectrum, as indicated by its 40th percentile ranking among all CPUs in the benchmark database. The launch MSRP was $213. Its average benchmark score of 1561 places it in a tight cluster with several rivals, and its architecture—Skylake, built on a 14nm process with a 177 mm² die—reflects a mature design that prioritizes efficiency over raw speed.

Benchmark Performance

The i5-6600T's overall average benchmark score of 1561 is effectively indistinguishable from its nearest rivals. The Intel Core i5-4690S and AMD Opteron 6276 both score 1560, a delta of 0.1% ahead. The Intel Atom x7835RE scores 1558 (0.2% behind), and the Intel Core i3-8300 scores 1557 (0.3% behind). These differences are within the noise of benchmark variance, meaning the i5-6600T delivers essentially the same aggregate performance as these other processors. The 40th percentile ranking further underscores its mid-low position—it outperforms 40% of all CPUs in the database, but the majority of processors are faster.

Looking at specific workloads, the Cinebench R23 multicore score of 4735 and single-core score of 668 reveal a strong multi-threaded advantage. The multicore result is more than seven times the single-core figure, but the absolute numbers are modest. In Cinebench R20, the multicore score is 1988 and single-core is 280. The older Cinebench R15 yields 477 multicore and 67 single-core. Geekbench reports 3104 multicore and 1172 single-core. These scores are consistent with a processor that handles everyday tasks with ease but will struggle with heavily threaded professional workloads such as 3D rendering or video encoding.

The close parity with the Intel Core i3-8300 is particularly notable. The i3-8300 is a newer dual-core with hyper-threading, while the i5-6600T has four physical cores without hyper-threading. In multi-threaded applications, the i5-6600T's extra cores likely compensate for its older architecture, resulting in similar overall scores. The single-core scores, however, are lower than what a modern i3 would produce—the i5-6600T's 668 in Cinebench R23 single-core is modest, but for typical office tasks, it remains responsive. The cache hierarchy—64 KB L1 per core, 256 KB L2 per core, and 6 MB shared L3—is typical for a quad-core Skylake part and contributes to its consistent behavior across tests.

Power and Thermals

The defining characteristic of the i5-6600T is its 35W TDP. This is a low-power design, ideal for systems where heat output and fan noise are primary concerns. The base clock of 2.70 GHz and boost clock of 3.50 GHz are modest, but the low TDP allows for a wide range of cooling solutions, from a stock cooler to a low-profile cooler in a small form factor chassis. The 14nm process node and 177 mm² die size reflect a mature manufacturing technology that balances performance and efficiency. The processor is not multiplier-unlocked (multiplierUnlocked: false), so overclocking is not an option, aligning with its power-efficient positioning.

The integrated UHD Graphics 530 is part of the package, but it is not intended for heavy graphics workloads. It provides basic display output and can handle video playback, but for gaming or GPU-accelerated tasks, a discrete graphics card is necessary. The integrated graphics share system memory, and the memory bandwidth of 34.1 GB/s is sufficient for light media use. The 35W TDP also implies that the processor can be passively cooled in some chassis, though a small fan is typically recommended for sustained loads. For users building a silent HTPC or a compact office PC, the i5-6600T's thermal profile is a major advantage.

Who Should Consider It

The i5-6600T is best suited for office productivity, web browsing, and light content creation. Its Cinebench R23 multicore score of 4735 suggests it can handle photo editing, document processing, and even some light video encoding, though not at a professional level. The single-core score of 668 in R23 indicates responsive performance for everyday tasks such as spreadsheets, word processing, and email. The four cores and four threads are enough for multi-tasking, but not for heavy parallel workloads.

For gaming, the i5-6600T's four physical cores are sufficient for many titles, especially when paired with a discrete GPU. Its performance is comparable to the Intel Core i3-8300, which is often used in budget gaming builds. However, the integrated UHD Graphics 530 is not suitable for modern gaming; a dedicated graphics card is required for anything beyond basic 2D or older 3D titles. With a discrete GPU, the CPU can drive entry-level gaming experiences, though frame rates may be limited in CPU-bound scenarios.

The low 35W TDP makes this processor an excellent choice for HTPCs, small form factor systems, or any build where low power consumption and quiet operation are priorities. Since the production status is end-of-life, it is now primarily a used or legacy component, ideal for upgrading an older Socket 1151 system or for a budget build where power efficiency matters more than raw performance. It is not recommended for new high-end builds, but for users who already own a compatible motherboard, it offers a cost-effective upgrade path.

FAQ

Q: What is the socket type for the Intel Core i5-6600T?

A: The processor uses the Intel Socket 1151.

Q: Does the i5-6600T support ECC memory?

A: No, ECC memory is not supported.

Q: What is the TDP of this processor?

A: The TDP is 35 watts.

Q: What integrated graphics does it include?

A: It includes Intel UHD Graphics 530.

Q: What was the launch MSRP?

A: The launch MSRP was $213.

Q: Is the processor overclockable?

A: No, the multiplier is locked (multiplierUnlocked: false).

Platform and Compatibility

The i5-6600T is built for the Intel Socket 1151 platform. It supports both DDR3 and DDR4 memory, with a dual-channel memory bus and a memory bandwidth of 34.1 GB/s. This flexibility allows it to be paired with a range of motherboards, from budget DDR3 boards to more modern DDR4 boards, depending on the chipset. The CPU provides 16 PCIe Gen 3 lanes (CPU only), which can be used for a discrete graphics card or other expansion cards. The integrated UHD Graphics 530 provides display outputs, but the PCIe lanes are available for dedicated GPUs.

The production status is end-of-life, meaning Intel no longer manufactures this processor. For upgrade paths, the Socket 1151 platform supports other Skylake and Kaby Lake processors, but the specific compatibility depends on the motherboard's chipset and BIOS. Since the i5-6600T is end-of-life, users looking to upgrade would need to consider other processors within the same socket generation, but no new releases are planned for this platform. The lack of ECC support and the locked multiplier further define its target market as mainstream desktop users rather than workstation or enthusiast segments. The processor's 177 mm² die size and 14nm process node are consistent with other Skylake parts, and its cache configuration—64 KB L1 per core, 256 KB L2 per core, and 6 MB shared L3—is standard for a quad-core design. For those building a new system, the i5-6600T is a legacy option, but for existing Socket 1151 systems, it remains a viable low-power choice.