Intel Atom x7809C vs Intel Core i7-7700K Comparison

The Intel Core i7-7700K and the Intel Atom x7809C represent two very different philosophies within Intel's lineup, separated by seven years of design evolution. The database places the Core i7-7700K at the 68th percentile among all CPUs, while the Atom x7809C sits just one point lower at the 67th percentile, indicating they are closer in overall performance than their architectural origins would suggest. The head-to-head benchmark data confirms this, with the Core i7-7700K taking 15 of the 17 recorded tests, though the Atom’s two victories reveal meaningful strengths in specific workloads.

FAQ

Q: Which processor wins more benchmark tests in the database?

A: The Intel Core i7-7700K wins 15 of the 17 head-to-head tests against the Intel Atom x7809C, while the Atom takes the remaining 2 tests.

Q: What is the largest performance gap between the two processors?

A: The biggest margin is in the PassMark single-thread test, where the Core i7-7700K scores 2708 against the Atom’s 1462, a delta of 85.2%. The second-largest gap favors the Atom in data encryption, where it leads by 57.3%.

Q: How do their multi-core Cinebench scores compare?

A: The Core i7-7700K leads in every Cinebench multi-core test, but by slim margins. In Cinebench R23 multi-core, the 7700K scores 8189 versus 7997 for the Atom, a 2.4% advantage.

Q: Does the Atom x7809C have any advantage in power-related specifications?

A: Yes, the Atom x7809C has a TDP of 25 watts compared to the Core i7-7700K’s 91 watts, a substantial difference for systems where thermal output and power draw are critical factors.

Q: What are the release dates for these two processors?

A: The Intel Core i7-7700K was released on January 2, 2017, while the Intel Atom x7809C followed much later, with a release date of April 7, 2024.

Q: Which processor offers a higher single-thread score in PassMark?

A: The Core i7-7700K is far ahead, scoring 2708 in PassMark single-thread versus 1462 for the Atom, representing an 85.2% lead.

Architecture Differences

The two chips are built on fundamentally different foundations. The Core i7-7700K uses the Kaby Lake architecture on a 14 nm process node, while the Atom x7809C employs the Amston Lake architecture, also branded as the Atom generation with Gracemont cores, on a 10 nm node. This process difference is significant, as the newer 10 nm node allows the Atom to achieve its performance with dramatically lower power consumption.

The core configurations differ sharply. The 7700K packs 4 cores with 8 threads, relying on Hyper-Threading to reach that thread count. The Atom x7809C uses 8 physical cores and 8 threads, with no hyper-threading, meaning every thread maps to a dedicated core. Despite having twice the physical core count, the Atom’s Gracemont cores are designed for efficiency rather than raw throughput, which explains why it cannot outpace the older Kaby Lake chip in most tests.

Clock speeds tell a similar story. The 7700K runs at a base of 4.20 GHz with a boost of 4.50 GHz, while the Atom starts much lower at 2.00 GHz but boosts to 3.60 GHz. The maximum boost clock of the 7700K is nearly 1 GHz higher, giving it a distinct advantage in latency-sensitive tasks that depend on single-core speed.

Cache hierarchies also diverge. The 7700K provides 64 KB of L1 cache per core, 256 KB of L2 per core, and a shared 8 MB L3 cache. The Atom allocates 96 KB of L1 per core, a larger 2 MB L2 per module, but only 6 MB of shared L3. The Atom’s larger L1 and L2 caches reflect its design for efficiency, though the 7700K’s larger L3 pool helps in multi-threaded workloads.

Memory support is another clear split. The 7700K supports DDR4 memory over a dual-channel bus, while the Atom supports both DDR4 and DDR5 but only over a single-channel bus. Interestingly, both processors record the same memory bandwidth of 38.4 GB/s in the database, despite the channel difference, likely due to the Atom’s support for faster memory modules.

The 7700K includes integrated graphics in the form of HD 630, whereas the Atom x7809C has no integrated graphics at all. The 7700K also offers 16 PCIe Gen 3 lanes, while the Atom provides only 9 PCIe Gen 3 lanes. The 7700K features an unlocked multiplier, allowing overclocking, while the Atom’s multiplier is locked.

Head-to-Head Benchmarks

The head-to-head data paints a clear picture of a processor that dominates in general-purpose and single-threaded work, with a few exceptions that highlight the Atom’s specialized strengths.

In Cinebench tests, the 7700K wins all six recorded benchmarks, but by narrow margins. Cinebench R15 multi-core shows a 2.5% lead (825 vs 805), while single-core in the same test is a 2.7% gap (116 vs 113). The R20 suite follows the same pattern: multi-core at 3439 vs 3358 (2.4%) and single-core at 485 vs 474 (2.3%). Cinebench R23 results are equally close, with multi-core at 8189 vs 7997 (2.4%) and single-core at 1156 vs 1129 (2.4%). These figures suggest that for rendering workloads, the two chips are nearly interchangeable in performance.

The PassMark suite reveals the 7700K’s broader dominance. In data compression, the 7700K scores 136852 against 111525, a commanding 22.7% lead. Extended instructions show an even larger gap, 8943 vs 5509, a 62.3% advantage. Single-thread performance is the most lopsided: 2708 vs 1462, an 85.2% difference, recorded identically in both the single_thread and singlethread tests.

Other PassMark tests favor the 7700K by smaller margins. Integer math shows a 5.6% lead (30553 vs 28946), floating point math a 5% edge (18741 vs 17856), and random string sorting a 9.4% advantage (17208 vs 15728). Prime number finding is close, with 31 vs 29, a 6.9% gap. PassMark multithread shows just a 2.3% difference (9627 vs 9409).

The Atom x7809C claims two wins. Data encryption is its standout victory: 7832 vs 3343, a 57.3% lead for the Atom. This suggests its Gracemont cores include hardware acceleration for encryption workloads, making it the clear choice for that specific task. The Atom also wins the PassMark physics test, scoring 686 against 655, a 4.5% advantage.

The wins distribution of 15 for the 7700K and 2 for the Atom aligns with their overall average benchmark scores: 13291 for the 7700K versus 12607 for the Atom, a difference of roughly 5.4%.

Specification Differences

The two processors differ across nearly every major specification category, reflecting their distinct market positions.

The Core i7-7700K uses 4 cores and 8 threads, while the Atom x7809C uses 8 cores and 8 threads. Base clocks are 4.20 GHz versus 2.00 GHz, and boost clocks are 4.50 GHz versus 3.60 GHz, both favoring the 7700K.

TDP is a major differentiator: 91 watts for the 7700K versus 25 watts for the Atom. This makes the Atom far more suitable for compact, passively cooled systems, while the 7700K requires active cooling and a desktop platform.

The socket types are incompatible. The 7700K uses Intel Socket 1151, while the Atom uses Intel BGA 1264, meaning the Atom is soldered to the board and not upgradeable. The 7700K is a desktop part, while the Atom is classified as mobile.

Process nodes differ at 14 nm versus 10 nm, with the Atom built on the newer process. Cache configurations also differ: the 7700K has 64 KB L1 per core and 256 KB L2 per core, while the Atom has 96 KB L1 per core and 2 MB L2 per module. L3 cache is 8 MB shared for the 7700K versus 6 MB shared for the Atom.

Memory support diverges in both type and channel count. The 7700K supports only DDR4 over dual-channel, while the Atom supports DDR4 and DDR5 over single-channel. Memory bandwidth is recorded as 38.4 GB/s for both, despite the channel difference.

PCIe lanes are another split: 16 lanes for the 7700K versus 9 lanes for the Atom, both at Gen 3. The 7700K has integrated HD 630 graphics, while the Atom has N/A for integrated graphics. The 7700K has an unlocked multiplier, the Atom’s is locked. The 7700K was released in 2017, while the Atom arrived in 2024.

Where Each One Wins

The Core i7-7700K is the clear winner for most desktop workloads, particularly those that rely on single-thread performance. Its 85.2% lead in PassMark single-thread makes it vastly superior for everyday application responsiveness, web browsing, and lightly threaded software. The 62.3% advantage in extended instructions also points to better performance in vectorized compute tasks, which benefit from the 7700K’s higher clock speeds and older but potent architecture.

For content creation and rendering, the 7700K maintains a consistent but narrow edge across all Cinebench versions. The 2.4% to 2.5% margins in multi-core tests mean that users rendering videos or images will see a small but measurable benefit from the 7700K. Similarly, integer math, floating point, and random string sorting all favor the 7700K by margins between 5% and 9.4%, making it the better choice for general productivity and development workloads.

The Atom x7809C wins decisively in data encryption, where its 57.3% lead makes it the obvious pick for workloads involving heavy cryptographic operations, such as VPN gateways, secure communication servers, or database encryption. This is a specialized but real advantage that cannot be ignored.

The Atom’s other win, a 4.5% edge in PassMark physics, suggests it handles certain simulation workloads slightly better, though this is a narrow margin and unlikely to sway most users.

Beyond raw performance, the Atom’s 25 watt TDP versus the 7700K’s 91 watts positions it as the logical choice for power-sensitive deployments. Edge computing, network appliances, and fanless industrial systems benefit from the Atom’s efficiency, even if it trails in most benchmark tests. The Atom’s support for DDR5 memory and its newer 10 nm process also give it a forward-looking edge in platform longevity, despite its single-channel memory bus.

In summary, the 7700K is the superior general-purpose processor, winning 15 of 17 tests and offering a massive single-thread advantage. The Atom x7809C is the specialist, winning encryption workloads decisively and offering a dramatically lower power envelope, making it the right tool for specific embedded and efficiency-focused roles.