Intel Arc G3 EXTREME vs Intel Core Ultra 7 366H Comparison

Intel Arc G3 EXTREME and Intel Core Ultra 7 366H are both mobile processors built on Intel's Panther Lake architecture, yet the benchmark data reveals a clear performance hierarchy between them. The Core Ultra 7 366H wins 15 of the 17 recorded head-to-head comparisons, while the Arc G3 EXTREME manages only 2 victories, both in the same PassMark single-thread test. The average benchmark score difference is substantial: the Arc G3 EXTREME sits at 36,699, while the Core Ultra 7 366H reaches 41,263, a gap that places them in different performance percentiles (85th vs 87th among all CPUs).

Head-to-Head Benchmarks

The most dramatic separation occurs in Cinebench R23, where the Core Ultra 7 366H delivers 28,477 points in multi-core against the Arc G3 EXTREME's 14,655, a 48.5% deficit for the Arc part. Single-core R23 tells an even starker story: the Core Ultra 7 366H scores 4,020 versus 1,862, making the Arc G3 EXTREME 53.7% slower. These are the two largest deltas in the entire comparison, indicating that the Core Ultra 7 366H holds a commanding lead in both heavily threaded and lightly threaded rendering workloads.

Cinebench R15 results follow the same pattern but with different magnitudes. The multi-core test shows the Core Ultra 7 366H at 2,870 versus 2,192 for the Arc G3 EXTREME, a 23.6% advantage. The single-core R15 test shows the Core Ultra 7 366H at 405 versus 267, a 34.1% lead. Interestingly, the R20 tests compress the gap considerably: multi-core scores are 11,960 versus 10,945 (8.5% difference), and single-core scores are 1,688 versus 1,545, also 8.5%. This inconsistency across Cinebench versions suggests the Core Ultra 7 366H gains disproportionately more in the newer R23 workload, possibly reflecting better optimization for that test's instruction mix.

PassMark integer math shows the Core Ultra 7 366H at 83,695 versus 71,164, a 15% advantage. Floating-point math shows a similar 16.1% gap: 103,615 versus 86,929. The Core Ultra 7 366H also leads in extended instructions (26,901 versus 24,017, a 10.7% gap) and prime number finding (326 versus 248, a 23.9% gap). Data compression favors the Core Ultra 7 366H by 6.2% (327,455 versus 307,094), and data encryption shows a 7.6% edge (25,845 versus 23,881).

The Core Ultra 7 366H wins the PassMark multithread test with 33,429 versus 30,659, an 8.3% margin, and the physics test with 2,880 versus 2,515, a 12.7% gap. Random string sorting goes to the Core Ultra 7 366H by 6.2% (39,814 versus 37,331). The only bright spot for the Arc G3 EXTREME is PassMark single-thread, where it scores 4,293 against 4,043, a 6.2% win that appears twice in the recorded data (both as passmark_single_thread and passmark_singlethread). This single-thread victory is notable because it contradicts the Cinebench single-core results, where the Core Ultra 7 366H wins by wide margins. The PassMark single-thread test apparently measures something different from Cinebench's single-core workload, giving the Arc G3 EXTREME a narrow but consistent advantage.

The Verdict

The data points decisively toward the Intel Core Ultra 7 366H as the stronger processor across nearly every workload category. Its 16 cores and 16 threads outnumber the Arc G3 EXTREME's 14 cores and 14 threads, and its higher base clock (2.00 GHz versus 1.90 GHz) and boost clock (4.80 GHz versus 4.70 GHz) contribute to the performance gap. The Core Ultra 7 366H also holds the higher percentile ranking (87th versus 85th) and a higher average benchmark score (41,263 versus 36,699).

The Arc G3 EXTREME does claim a single meaningful victory in PassMark single-thread performance, a 6.2% edge that could matter for specific legacy workloads or applications that mirror that test's characteristics. However, this is an isolated win against a broad sweep of losses. The Cinebench R23 single-core result, where the Core Ultra 7 366H leads by 53.7%, suggests that most modern single-threaded applications will favor the Core Ultra 7 366H despite the PassMark counterexample.

For rendering, mathematical computation, encryption, compression, and physics simulation, the Core Ultra 7 366H is the clear choice. The Arc G3 EXTREME only makes sense for users whose primary workload aligns with the PassMark single-thread test pattern, a narrow use case that the broader benchmark data does not support.

FAQ

Q: Which processor wins more head-to-head benchmarks?

A: The Intel Core Ultra 7 366H wins 15 of the 17 recorded head-to-head comparisons. The Intel Arc G3 EXTREME wins 2, both being the PassMark single-thread test.

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

A: The largest gap is in Cinebench R23 single-core, where the Core Ultra 7 366H scores 4,020 versus 1,862 for the Arc G3 EXTREME, a 53.7% difference. The second largest is Cinebench R23 multi-core at 48.5%.

Q: Does the Arc G3 EXTREME win any benchmark?

A: Yes, the Arc G3 EXTREME wins the PassMark single-thread test with a score of 4,293 versus 4,043 for the Core Ultra 7 366H, a 6.2% advantage. This result appears twice in the database under two test names.

Q: How do the average benchmark scores compare?

A: The Core Ultra 7 366H has an average benchmark score of 41,263, while the Arc G3 EXTREME averages 36,699. The difference places the Core Ultra 7 366H in the 87th percentile versus the 85th percentile for the Arc G3 EXTREME.

Q: Which processor has more cores and threads?

A: The Core Ultra 7 366H has 16 cores and 16 threads. The Arc G3 EXTREME has 14 cores and 14 threads.

Q: How do the processors compare in PassMark integer math?

A: The Core Ultra 7 366H scores 83,695 in PassMark integer math, which is 15% higher than the Arc G3 EXTREME's 71,164.

Specification Differences

The two processors differ in core count, thread count, clock speeds, memory support, memory bandwidth, PCIe lanes, integrated graphics, release date, and part number. The Core Ultra 7 366H has 16 cores and 16 threads, while the Arc G3 EXTREME has 14 cores and 14 threads. Base clock speeds are 2.00 GHz for the Core Ultra 7 366H and 1.90 GHz for the Arc G3 EXTREME. Boost clocks are 4.80 GHz and 4.70 GHz, respectively.

Memory support differs: the Core Ultra 7 366H supports both DDR5 and LPDDR5X, while the Arc G3 EXTREME supports only LPDDR5X. Memory bandwidth also differs, with the Arc G3 EXTREME rated at 136.5 GB/s and the Core Ultra 7 366H at 115.2 GB/s. Both use dual-channel memory buses.

PCIe configuration differs significantly: the Core Ultra 7 366H provides Gen 5 with 12 lanes (CPU only), while the Arc G3 EXTREME provides Gen 5 with 4 lanes (CPU only). The integrated graphics units differ as well: the Arc G3 EXTREME uses Arc B390 graphics, while the Core Ultra 7 366H uses Intel Xe3 Graphics.

The release dates are different, with the Core Ultra 7 366H releasing earlier at 2026-01-04 and the Arc G3 EXTREME at 2026-05-27. The part numbers are SA4R9Q9EL for the Core Ultra 7 366H and SA4R3 for the Arc G3 EXTREME. Both processors share the same TDP of 25, the same socket (Intel BGA 2540), the same 3 nm process node, and neither has an unlocked multiplier.

Architecture Differences

Both processors share the Panther Lake codename and are built on Intel's 3 nm process node. The Arc G3 EXTREME is designated as part of the Arc G3 generation (Panther Lake), while the Core Ultra 7 366H belongs to the Ultra 7 generation (Panther Lake-H). The series field is null for the Arc G3 EXTREME, whereas the Core Ultra 7 366H is listed in the Core Ultra Series 3.

Cache configurations are identical between the two: L1 cache is 192 KB per core, L2 cache is 2.5 MB per core, and L3 cache is 18 MB shared. Neither processor uses 3D V-Cache, and neither lists total L3 cache separately.

Both processors are produced by Intel and neither supports ECC memory. Both are classified as mobile market segment processors with active production status. The memory bandwidth difference (136.5 GB/s for the Arc G3 EXTREME versus 115.2 GB/s for the Core Ultra 7 366H) is notable given that the Core Ultra 7 366H otherwise leads in performance, suggesting the bandwidth advantage does not translate into benchmark wins.

The integrated graphics differ, with the Arc G3 EXTREME featuring Arc B390 and the Core Ultra 7 366H featuring Intel Xe3 Graphics. The PCIe lane difference (4 lanes versus 12 lanes for Gen 5) indicates the Core Ultra 7 366H has more expansion headroom for external devices, though the Arc G3 EXTREME's higher memory bandwidth could benefit integrated graphics workloads.

Where Each One Wins

The Intel Core Ultra 7 366H wins in every Cinebench test (R15, R20, R23, both single-core and multi-core), all PassMark computational tests (integer math, floating-point math, extended instructions, prime number finding, data compression, data encryption), and the PassMark multithread, physics, and random string sorting tests. This makes it the preferred processor for rendering, scientific computing, encryption, compression, and any workload that scales with multiple cores.

The Intel Arc G3 EXTREME wins only the PassMark single-thread test, with a 6.2% margin over the Core Ultra 7 366H. This could indicate an advantage in specific single-threaded applications that resemble the PassMark test, but the Cinebench single-core results contradict this pattern. The Arc G3 EXTREME also has a higher memory bandwidth (136.5 GB/s versus 115.2 GB/s), which may benefit memory-intensive tasks even though the benchmark data does not show a corresponding win.

The Core Ultra 7 366H's additional 2 cores and 2 threads, combined with higher clock speeds, support its dominance in multi-threaded workloads. Its earlier release date (January 2026 versus May 2026) suggests it established a presence in the mobile market before the Arc G3 EXTREME arrived. The data shows a processor that is broadly superior in performance, with the Arc G3 EXTREME offering only a narrow single-thread niche and a memory bandwidth specification advantage that does not materialize into benchmark victories.