CPU Comparison

The Intel Core i7-6800K and the Intel Atom x7211RE represent opposite ends of Intel’s design philosophy, separated by nearly a decade of process evolution and market intent. The i7-6800K is a 6-core, 12-thread desktop flagship from the Broadwell-E era, built for maximum throughput on a 140 W power budget. The Atom x7211RE is a 2-core, 2-thread mobile part from the Amston Lake family, sipping just 6 W while targeting embedded and low-power workloads. Benchmark data confirms a massive performance gulf, but the Atom’s inclusion of integrated graphics and newer memory support reveals a different set of priorities.

Where Each One Wins

The Intel Core i7-6800K wins every single head-to-head benchmark in the dataset, and it does so by overwhelming margins. In Cinebench R23 multi-core, the i7-6800K scores 9093 against the Atom’s 1804, a 404% advantage. The single-core gap is equally stark: 1283 versus 254 in Cinebench R23, a 405.1% delta. This is not a close contest by any metric; the i7-6800K is designed for compute-heavy desktop tasks like rendering, compilation, and scientific simulation, where its 6 cores and 12 threads can be fully utilized.

The Atom x7211RE, despite losing all five head-to-head tests, has a clear domain where it excels: power efficiency and system integration. Its 6 W TDP versus the i7-6800K’s 140 W means the Atom can operate in fanless or passively cooled embedded systems where the i7-6800K would require substantial cooling infrastructure. The Atom also includes UHD Graphics 16EU, while the i7-6800K has no integrated graphics, making the Atom a complete system-on-chip for low-cost, low-power appliances. In benchmark terms, the Atom’s PassMark single-thread score of 1317 is actually higher than its Cinebench R23 single-core score of 254 would suggest, indicating its strength in lightweight, instruction-level tasks that don’t scale with core count.

The i7-6800K’s percentile ranking of 51 among all CPUs places it in the middle of the pack, while the Atom’s identical 51 percentile is surprising given its much lower raw scores. This suggests the Atom’s average benchmark score of 2811 is buoyed by PassMark tests that favor its specific architecture, whereas the i7-6800K’s average of 2838 is dominated by Cinebench workloads. For pure multi-core muscle, the i7-6800K is the unambiguous winner; for low-power, always-on systems with modest compute needs, the Atom is the viable choice.

Architecture Differences

The two processors are built on fundamentally different microarchitectures separated by two process nodes. The i7-6800K uses Intel’s Broadwell-E architecture on a 14 nm process, while the Atom x7211RE uses the Amston Lake architecture on a 10 nm node. The i7-6800K is a high-performance desktop part with 6 cores, 12 threads, and a base clock of 3.40 GHz boosting to 3.60 GHz. The Atom x7211RE has just 2 cores and 2 threads, with a 1.00 GHz base clock that can boost to 3.20 GHz. The Atom’s boost behavior is notable: a 3.2x increase over base, reflecting its power-management-oriented design.

Cache hierarchies diverge significantly. The i7-6800K allocates 64 KB of L1 and 256 KB of L2 per core, plus a shared 15 MB L3 cache. The Atom x7211RE has larger per-core L1 at 96 KB, but its L2 is 2 MB shared across both cores, and its L3 is 6 MB shared. This reflects the Atom’s Gracemont core design, which prioritizes area efficiency and lower power over raw per-core performance. The i7-6800K’s larger L3 is crucial for keeping its 12 threads fed with data.

Memory support is another major divergence. The i7-6800K uses DDR4 with a quad-channel memory bus, yielding 76.8 GB/s of bandwidth. The Atom x7211RE supports both DDR4 and DDR5, but with a single-channel bus, capping bandwidth at 38.4 GB/s. For memory-intensive workloads, the i7-6800K has a 100% bandwidth advantage. The i7-6800K also offers 28 PCIe Gen 3 lanes, while the Atom provides just 9 Gen 3 lanes. Neither supports ECC memory, and the i7-6800K has an unlocked multiplier for overclocking, whereas the Atom is locked. The i7-6800K uses Socket 2011-3, while the Atom is soldered to BGA 1264.

FAQ

Q: Which processor has better multi-core performance?

A: The Intel Core i7-6800K is overwhelmingly faster. In Cinebench R23 multi-core, it scores 9093 versus the Atom’s 1804, a 404% lead. The same pattern holds in Cinebench R20 multi-core (3819 vs 757) and Cinebench R15 multi-core (916 vs 181).

Q: Does the Atom x7211RE have any performance advantage?

A: No. The i7-6800K wins all five head-to-head benchmarks in the dataset. The Atom’s only comparative strength is its PassMark single-thread score of 1317, which is higher than its Cinebench scores would suggest, but it still loses to the i7-6800K in every shared test.

Q: What are the power consumption differences?

A: The i7-6800K has a TDP of 140 W, while the Atom x7211RE has a TDP of just 6 W. This 134 W difference makes the Atom suitable for passive cooling and battery-powered embedded systems, whereas the i7-6800K requires active cooling and a robust power delivery system.

Q: Do these CPUs support the same memory types?

A: No. The i7-6800K supports only DDR4 with a quad-channel interface. The Atom x7211RE supports both DDR4 and DDR5, but only with a single-channel interface, resulting in half the memory bandwidth (38.4 GB/s vs 76.8 GB/s).

Q: Which processor has integrated graphics?

A: Only the Atom x7211RE includes integrated graphics, specifically UHD Graphics 16EU. The i7-6800K has no integrated graphics, requiring a discrete GPU for display output.

Q: Are these processors in the same market segment?

A: No. The i7-6800K is a desktop part that is end-of-life, while the Atom x7211RE is an active mobile/embedded processor. Their sockets differ (2011-3 vs BGA 1264), and their market segments are listed as Desktop and Mobile respectively.

Specification Differences

The two CPUs differ in nearly every specification field. The i7-6800K has 6 cores and 12 threads, while the Atom x7211RE has 2 cores and 2 threads. Base clocks are 3.40 GHz versus 1.00 GHz, and boost clocks are 3.60 GHz versus 3.20 GHz. TDP is the largest relative difference: 140 W versus 6 W. The i7-6800K uses Socket 2011-3, while the Atom uses BGA 1264. Process nodes are 14 nm versus 10 nm. Cache configurations differ: the i7-6800K has 64 KB L1 and 256 KB L2 per core, plus 15 MB shared L3; the Atom has 96 KB L1 per core, 2 MB shared L2, and 6 MB shared L3. Memory support is DDR4 quad-channel for the i7-6800K versus DDR4/DDR5 single-channel for the Atom. Memory bandwidth is 76.8 GB/s versus 38.4 GB/s. PCIe lanes are 28 versus 9, both Gen 3. The i7-6800K has no integrated graphics, while the Atom has UHD Graphics 16EU. The i7-6800K has an unlocked multiplier; the Atom does not. Release dates are 2016-05-30 for the i7-6800K and 2024-04-07 for the Atom. Launch MSRP values are $434 and $42, respectively.

Head-to-Head Benchmarks

The largest single win for the i7-6800K comes in Cinebench R20 single-core, where it scores 538 against the Atom’s 106, a 407.5% delta. This is the only benchmark where the Atom scores below 200 points, highlighting the i7-6800K’s superior per-thread execution. In multi-core tests, the margins are similarly extreme: Cinebench R15 multi-core shows 916 versus 181 (406.1%), and Cinebench R23 multi-core shows 9093 versus 1804 (404%). The consistency of the ~405% delta across all five tests is remarkable, suggesting that the i7-6800K’s advantage is architectural rather than workload-specific.

The Atom’s best relative showing is in Cinebench R23 multi-core, where its 1804 points represent a 404% deficit, the smallest gap in percentage terms, though still a rout. The i7-6800K’s 12 threads allow it to scale far better in multi-threaded rendering, while the Atom’s 2 threads cap its throughput. The single-core tests (Cinebench R20 and R23) show the i7-6800K at 407.5% and 405.1% ahead, respectively. These numbers indicate that even at similar boost clocks (3.60 GHz vs 3.20 GHz), the Broadwell-E core is vastly more efficient at executing instructions than the Gracemont core.

The average benchmark scores tell a nuanced story: the i7-6800K averages 2838 across all tests, while the Atom averages 2811. This puts both processors in the 51st percentile of all CPUs, but the composition of those averages differs. The i7-6800K’s scores are heavily weighted by Cinebench results, while the Atom’s average is pulled up by PassMark tests like data compression (20820) and integer math (6517). In the head-to-head Cinebench tests, the i7-6800K wins every time, but the Atom’s PassMark suite reveals strengths in specific instruction-heavy tasks that don’t appear in the direct comparison. For a workload like data compression, the Atom’s 20820 PassMark score shows it can handle certain real-world tasks competitively, even though it loses decisively in synthetic rendering benchmarks.