Intel Core i7-11700T vs Intel Core i7-6900K Comparison

The Intel Core i7-6900K and Intel Core i7-11700T are both 8-core, 16-thread desktop processors, but they come from different eras and design philosophies. The 6900K is a Broadwell-E part from 2016, built for high-end desktop with a 140 W TDP, while the 11700T is a Rocket Lake part from 2021, a low-power variant with a 35 W TDP. In head-to-head testing, the 11700T wins 7 of 8 benchmarks, but the 6900K takes a decisive victory in Geekbench multi-core. This split reveals distinct strengths that matter for different workloads.

Head-to-Head Benchmarks

The benchmark data shows a clear pattern: the Intel Core i7-11700T dominates the Cinebench suite, while the Intel Core i7-6900K claims a single, but massive, win in Geekbench multi-core. Starting with Cinebench R15, the 11700T scores 1304 in multi-core against the 6900K's 1254, a 3.8% advantage. In single-core, the 11700T posts 184 versus 176, a 4.3% lead. Moving to Cinebench R20, the 11700T again leads in multi-core with 5436 against 5226, a 3.9% margin, and in single-core with 767 versus 737, also 3.9%. Cinebench R23 repeats the pattern: the 11700T scores 12945 in multi-core versus 12444, a 3.9% edge, and 1827 in single-core versus 1756, again 3.9%. Across all six Cinebench tests, the 11700T is consistently about 4% faster, regardless of thread count.

The Geekbench results tell a different story. In Geekbench multi-core, the 6900K scores 8774 against the 11700T's 6621, a 32.5% advantage. This is the largest delta in the entire comparison, and it flips the overall average. The 6900K's average benchmark score is 3970, while the 11700T sits at 3864, despite losing seven of eight head-to-head matchups. The reason is the weighting: Geekbench multi-core is a heavy contributor to the average, and the 6900K's lead there is enormous. In Geekbench single-core, however, the 11700T wins decisively with 1824 versus 1392, a 23.7% margin. That single-core gap is the second-largest delta in the set, and it underscores the architectural difference between the two chips.

The data indicates that the 11700T is the better all-around performer in most synthetic workloads, but the 6900K has a specific strength in multi-threaded Geekbench that cannot be ignored. The 6900K's win is not a narrow one; it is a 32.5% blowout, suggesting that workloads which resemble Geekbench's multi-threaded test will see a substantial benefit from the older chip. Meanwhile, the 11700T's wins are consistent but modest, ranging from 3.8% to 4.3% in Cinebench and 23.7% in Geekbench single-core. The overall picture is that the 11700T is the more balanced processor, while the 6900K is a specialist for multi-threaded integer and floating-point tasks.

Architecture Differences

The two processors share the same 14 nm process node, but their internal designs diverge sharply. The 6900K uses the Broadwell-E architecture, a refinement of the Broadwell microarchitecture aimed at high-end desktop. It has 8 cores and 16 threads, with a base clock of 3.20 GHz and a boost clock of 3.70 GHz. The 11700T uses the Rocket Lake architecture, which is a backport of the Sunny Cove core to 14 nm, and it runs at a much lower base clock of 1.40 GHz but boosts to 4.60 GHz. The TDP difference is stark: 140 W for the 6900K versus 35 W for the 11700T, reflecting the 11700T's low-power design.

Cache hierarchies differ as well. The 6900K has 64 KB of L1 per core, 256 KB of L2 per core, and a shared 20 MB L3 cache. The 11700T has 80 KB of L1 per core, 512 KB of L2 per core, and a shared 16 MB L3 cache. The 11700T has larger per-core caches, which helps with single-threaded performance, but the 6900K has more total L3. Memory support also differs: the 6900K uses quad-channel DDR4 with a theoretical bandwidth of 76.8 GB/s, while the 11700T uses dual-channel DDR4 with 51.2 GB/s. The 6900K's quad-channel memory is a significant advantage for memory-intensive workloads, and it pairs with 40 PCIe Gen 3 lanes, whereas the 11700T offers 20 PCIe Gen 4 lanes. The 11700T includes integrated UHD Graphics 750, while the 6900K has no integrated graphics, requiring a discrete GPU.

The 6900K has an unlocked multiplier, making it overclockable, while the 11700T is locked. The 6900K's die size is 246 mm² with 3,400 million transistors; the 11700T's die is larger at 276 mm², but its transistor count is not recorded in the database. The 6900K was released in May 2016, while the 11700T arrived in March 2021. Both are now end-of-life, but the 11700T is the newer design. The 6900K uses Socket 2011-3, while the 11700T uses Socket 1200, so they are not interchangeable.

Where Each One Wins

The benchmark results point to clear use-case splits. The 11700T wins in every Cinebench test, both single-core and multi-core, and in Geekbench single-core. This makes it the better choice for applications that rely on per-core performance, such as everyday productivity, web browsing, office suites, and lightly threaded creative tools. Its high boost clock of 4.60 GHz and larger L1 and L2 caches give it a strong single-thread advantage, as shown by the 23.7% lead in Geekbench single-core. The 11700T also has integrated graphics, so it can run a system without a discrete GPU, which is a practical advantage for basic builds or office machines. Its 35 W TDP means it generates far less heat and requires less cooling, making it suitable for compact or low-noise systems.

The 6900K wins only in Geekbench multi-core, but that win is substantial. The 32.5% margin suggests that workloads which scale well across many threads and benefit from high memory bandwidth will favor the 6900K. Its quad-channel memory controller and 40 PCIe Gen 3 lanes are designed for high-end desktop tasks like video editing, 3D rendering, and scientific computing, where memory throughput and expansion capacity matter. The 6900K's 20 MB L3 cache, while smaller per-core, is still a large pool for shared data. The unlocked multiplier also allows overclocking, which could further improve its multi-threaded performance, though the database does not include overclocked results. For users who need maximum multi-threaded throughput and have a discrete GPU, the 6900K is the stronger option.

FAQ

Q: Which processor has higher single-core performance?

A: The Intel Core i7-11700T wins in Geekbench single-core with a score of 1824 versus 1392 for the 6900K, a 23.7% advantage. It also leads in all Cinebench single-core tests, with margins around 4%.

Q: Which processor has higher multi-core performance?

A: The 11700T wins in all Cinebench multi-core tests, with scores of 1304, 5436, and 12945 in R15, R20, and R23 respectively, versus 1254, 5226, and 12444 for the 6900K. However, the 6900K wins Geekbench multi-core with 8774 against 6621, a 32.5% lead.

Q: What are the memory bandwidth differences?

A: The 6900K supports quad-channel DDR4 with a theoretical bandwidth of 76.8 GB/s, while the 11700T uses dual-channel DDR4 with 51.2 GB/s. The 6900K also has 40 PCIe Gen 3 lanes, compared to 20 PCIe Gen 4 lanes on the 11700T.

Q: Does the 11700T have integrated graphics?

A: Yes, the 11700T includes UHD Graphics 750. The 6900K has no integrated graphics, so it requires a discrete GPU for display output.

Q: What are the TDP and clock speeds?

A: The 6900K has a TDP of 140 W, a base clock of 3.20 GHz, and a boost clock of 3.70 GHz. The 11700T has a TDP of 35 W, a base clock of 1.40 GHz, and a boost clock of 4.60 GHz.

Q: Which processor is newer?

A: The 11700T was released in March 2021, while the 6900K was released in May 2016. Both are end-of-life, but the 11700T is the more recent design.

The Verdict

The data shows that the Intel Core i7-11700T is the better processor for the majority of workloads. It wins 7 of 8 head-to-head benchmarks, including all Cinebench tests and Geekbench single-core, and it does so while consuming only 35 W of power. Its high boost clock and larger per-core caches give it a clear edge in single-threaded tasks, and its integrated graphics add convenience. The 11700T had a launch MSRP of $323, while the 6900K had a launch MSRP of $1089, though price is not a factor in performance analysis.

The Intel Core i7-6900K, however, is not obsolete. Its 32.5% victory in Geekbench multi-core is the largest margin in the comparison, and its quad-channel memory and 40 PCIe Gen 3 lanes make it a strong choice for memory-hungry, multi-threaded applications. The 6900K's 140 W TDP and lack of integrated graphics are drawbacks, but for users who prioritize raw multi-threaded throughput and have a discrete GPU, it remains a viable option. The 11700T is the more balanced and efficient choice for general use, while the 6900K is a specialist for specific high-end workloads.