AMD Ryzen Threadripper 1900X vs Intel Core i7-6900K Comparison

Head-to-Head Benchmarks

The benchmark data presents a fascinating split decision between these two eight-core, sixteen-thread desktop processors. Across the eight recorded tests, the AMD Ryzen Threadripper 1900X claims six victories, while the Intel Core i7-6900K takes two, but the margins and test types reveal a more nuanced story than the raw win count suggests.

The Threadripper 1900X is decisively ahead in every Cinebench workload. In Cinebench R15 multi-core, it scores 1440 against Intel's 1254, a 14.8% advantage. The single-core R15 test shows a 15.3% gap, with AMD scoring 203 versus Intel's 176. This pattern repeats exactly in the newer Cinebench versions: R20 multi-core shows 6000 versus 5226 (14.8%), R20 single-core shows 846 versus 737 (14.8%), R23 multi-core shows 14286 versus 12444 (14.8%), and R23 single-core shows 2016 versus 1756 (14.8%). The consistency of that 14.8% delta across nearly all Cinebench iterations is striking; it suggests a systematic architectural advantage in how the Zen design handles these rendering workloads, regardless of the specific benchmark generation.

However, the Geekbench results flip the script entirely. The Intel Core i7-6900K posts a multi-core score of 8774 against AMD's 6588, a 24.9% lead. The single-core Geekbench test also favors Intel, 1392 versus 1205, a 13.4% margin. This is a dramatic reversal. The same two CPUs that are nearly tied in Cinebench R15 multi-core (within 186 points) are separated by over 2000 points in Geekbench multi-core. Benchmark results indicate that Geekbench's workload mix rewards the Intel architecture's design in ways that Cinebench's rendering pipeline does not.

Looking at the average benchmark scores, the Threadripper 1900X sits at 4073, placing it in the 57th percentile of all CPUs in the database. The i7-6900K averages 3970, also landing in the 57th percentile. The overall average scores differ by just 103 points, roughly 2.5%, yet the individual test deltas range from 13.4% to 24.9% in opposite directions. This wide variance means the "winner" depends heavily on the target application.

The nearest rival data for the AMD chip places it alongside the Intel Core i5-12500TE (4083, 0.3% faster), the AMD Ryzen 7 PRO 2700X (4114, 1% faster), and the AMD Ryzen 9 5980HS (4121, 1.2% faster). For the Intel chip, the nearest rivals include the AMD Ryzen 7 PRO 5875U (3971, essentially tied), the AMD Ryzen 5 PRO 4650G (3977, 0.2% faster), and the Intel Xeon E5-2669 v3 (3959, 0.3% slower). Both chips occupy similar territory in the overall performance hierarchy, surrounded by a mix of mobile and desktop parts.

FAQ

Q: Which processor wins more benchmark tests?

A: The AMD Ryzen Threadripper 1900X wins 6 of the 8 recorded head-to-head tests, while the Intel Core i7-6900K wins 2.

Q: What is the biggest performance gap between the two?

A: The largest margin is in Geekbench multi-core, where the Intel Core i7-6900K leads by 24.9%. The AMD chip's largest winning margin is 15.3% in Cinebench R15 single-core.

Q: Are the Cinebench results consistent across versions?

A: Yes, the AMD chip leads by 14.8% in Cinebench R15 multi-core, R20 multi-core, R20 single-core, R23 multi-core, and R23 single-core, with a 15.3% lead in R15 single-core.

Q: Do both processors share the same core and thread count?

A: Yes, both the AMD Ryzen Threadripper 1900X and the Intel Core i7-6900K have 8 cores and 16 threads.

Q: How do their overall average benchmark scores compare?

A: The AMD Ryzen Threadripper 1900X averages 4073, while the Intel Core i7-6900K averages 3970, a difference of approximately 2.5% in favor of AMD.

Q: Which chip has a higher base clock speed?

A: The AMD Ryzen Threadripper 1900X has a base clock of 3.80 GHz, while the Intel Core i7-6900K has a base clock of 3.20 GHz.

Architecture Differences

The two processors come from different architectural lineages. The AMD Ryzen Threadripper 1900X is built on the Zen architecture, specifically the Whitehaven variant from the Ryzen Threadripper generation. It is fabricated on a 14 nm process at GlobalFoundries, using a dual-die design with a total die size of 2x 213 mm². The chip contains 9,600 million transistors. The Intel Core i7-6900K, by contrast, uses the Broadwell architecture from the Broadwell-E generation. It is also built on a 14 nm process, but at Intel's fabs, with a single die measuring 246 mm² and containing 3,400 million transistors. The transistor count difference is substantial: AMD's design packs nearly three times as many transistors, though spread across two dies.

Cache configurations differ markedly. The AMD chip provides 96 KB of L1 cache per core and 512 KB of L2 cache per core, with a 32 MB shared L3 cache. The Intel chip offers 64 KB of L1 per core and 256 KB of L2 per core, with a 20 MB shared L3 cache. AMD's larger L3 cache, 32 MB versus 20 MB, gives it a 60% capacity advantage in the final cache level, which likely contributes to its Cinebench performance.

Memory support is similar in structure: both support DDR4 memory with a quad-channel memory bus. However, the AMD chip achieves a higher theoretical memory bandwidth of 85.3 GB/s, compared to Intel's 76.8 GB/s. Neither processor supports ECC memory, and neither includes integrated graphics.

PCI Express connectivity differs significantly. The AMD Ryzen Threadripper 1900X provides 60 PCIe Gen 3 lanes (CPU only), while the Intel Core i7-6900K provides 40 PCIe Gen 3 lanes. That is a 50% lane advantage for AMD, which matters for multi-GPU configurations or high-density storage setups.

Clock speeds favor AMD as well. The Threadripper 1900X has a base clock of 3.80 GHz and a boost clock of 4.00 GHz. The i7-6900K runs at 3.20 GHz base and 3.70 GHz boost. Both chips have unlocked multipliers for overclocking. The AMD chip carries a 180 W TDP, while the Intel chip is rated at 140 W.

The sockets are incompatible: AMD uses Socket SP3r2, while Intel uses Socket 2011-3. The production status also differs, with AMD listed as active and Intel listed as end-of-life. The release dates place AMD's chip about 15 months later, launching in August 2017 versus May 2016 for Intel.

The Verdict

The data paints a clear picture of two chips with complementary strengths. The AMD Ryzen Threadripper 1900X is the superior choice for Cinebench-style rendering workloads, where it maintains a consistent 14.8% to 15.3% lead across every version of the test. Its larger L3 cache, higher clock speeds, and greater memory bandwidth all align with that result. The Intel Core i7-6900K, however, dominates Geekbench, with a 24.9% multi-core lead and a 13.4% single-core lead, indicating that applications with Geekbench-like workload patterns will favor Intel's architecture.

For users whose primary applications resemble Cinebench, the AMD chip delivers a reliable double-digit performance advantage. For users running Geekbench-type workloads, the Intel chip is the stronger performer despite its lower clock speeds and smaller cache. The overall average scores are close, 4073 versus 3970, but the distribution of wins is not balanced: six comprehensive wins for AMD in one benchmark family, two comprehensive wins for Intel in another.

The production status is a practical differentiator. AMD's chip remains active, while Intel's is end-of-life, which may affect availability for new builds. The PCIe lane difference, 60 versus 40, also favors AMD for expansion-heavy systems. The Intel chip's lower TDP, 140 W versus 180 W, could matter for cooling requirements, though both require robust cooling solutions given their desktop HEDT positioning.

The recorded data does not declare an overall victor; it declares a workload-dependent pairing. The Threadripper 1900X is the rendering champion, the i7-6900K is the Geekbench champion, and the choice rests on which benchmark family better represents the intended use case.

Specification Differences

| Specification | AMD Ryzen Threadripper 1900X | Intel Core i7-6900K |

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

| Base Clock | 3.80 GHz | 3.20 GHz |

| Boost Clock | 4.00 GHz | 3.70 GHz |

| TDP | 180 W | 140 W |

| Socket | AMD Socket SP3r2 | Intel Socket 2011-3 |

| Process Node | 14 nm (GlobalFoundries) | 14 nm (Intel) |

| Transistors | 9,600 million | 3,400 million |

| Die Size | 2x 213 mm² | 246 mm² |

| L1 Cache | 96 KB (per core) | 64 KB (per core) |

| L2 Cache | 512 KB (per core) | 256 KB (per core) |

| L3 Cache | 32 MB | 20 MB (shared) |

| Memory Bandwidth | 85.3 GB/s | 76.8 GB/s |

| PCIe Lanes | Gen 3, 60 Lanes (CPU only) | Gen 3, 40 Lanes (CPU only) |

| Release Date | 2017-08-30 | 2016-05-30 |

| Production Status | Active | End-of-life |

| Launch MSRP | $549 | $1089 |

Both processors share 8 cores, 16 threads, DDR4 memory support, quad-channel memory buses, lack of ECC support, lack of integrated graphics, and unlocked multipliers. The AMD chip was launched at a lower MSRP, though both sit in the high-end desktop segment. The Intel chip's launch MSRP was $1089, while AMD's was $549, but pricing considerations are secondary to the performance profile each chip delivers in its respective benchmark strongholds.