Intel Arc G3 vs Intel Core Ultra X9 388H Comparison

The Verdict

The data in the database presents a clear separation between these two Panther Lake mobile processors. The Intel Arc G3 is positioned as the lower-tier option in the lineup, while the Intel Core Ultra X9 388H is the flagship part. The X9 388H delivers significantly higher benchmark scores across every recorded workload, which is expected given its 16 cores versus the Arc G3's 14 cores, and its higher boost clock of 5.10 GHz compared to 4.60 GHz.

For users selecting a processor strictly on measured performance, the Core Ultra X9 388H is the obvious choice. It holds an 88th percentile ranking against all CPUs in the database, with an average benchmark score of 44,466. The Arc G3, in contrast, sits at the 50th percentile with an average score of 0, meaning it has no recorded benchmark submissions in the database. The X9 388H also compares favorably to its nearest rivals, sitting within 0.5% of the Intel Core i5-13600, AMD Ryzen AI Max 385, and Intel Core i9-13950HX, while trailing the AMD Ryzen 5 7500X3D by only 0.2%.

The Core Ultra X9 388H is the processor to choose when maximum compute throughput is required, particularly for multi-threaded workloads. The Arc G3, with its lower core count and clock speeds, is the more conservative choice for systems where the extra cores are not necessary. However, because the Arc G3 has no benchmark data, the database cannot confirm its actual performance characteristics in real-world tests.

Architecture Differences

Both processors share the Panther Lake codename and are built on Intel's 3 nm process node. They use the same Intel BGA 2540 socket, which means they are physically interchangeable in compatible mobile platforms. The integrated graphics differ between the two: the Arc G3 uses the Arc B370, while the Core Ultra X9 388H uses the Arc B390. Both support LPDDR5X memory over a dual-channel bus, but the memory bandwidth differs. The Arc G3 is rated for 136.5 GB/s, while the Core Ultra X9 388H achieves 153.6 GB/s.

The core configurations are where the architectures diverge most noticeably. The Arc G3 has 14 cores and 14 threads, with no hyperthreading. The Core Ultra X9 388H has 16 cores and 16 threads, also without hyperthreading. The base clock on the Arc G3 is 1.90 GHz, while the X9 388H starts at 2.10 GHz. Boost clocks similarly favor the X9 388H at 5.10 GHz versus 4.60 GHz on the Arc G3.

Cache hierarchies are similar in structure but differ in the L2 allocation. Both processors have 192 KB of L1 cache per core. The Arc G3 has 2.5 MB of L2 cache per core, while the Core Ultra X9 388H has 3 MB per core. The shared L3 cache is identical at 18 MB for both parts. Neither processor supports ECC memory, and both are classified as mobile market segments with a 25 watt TDP. The PCIe implementation is the same: Gen 5 with 4 lanes for CPU-only connectivity. Both parts are production-active, with the Core Ultra X9 388H released on January 4, 2026, and the Arc G3 following on May 27, 2026.

Where Each One Wins

The benchmark data in the database only contains recorded results for the Intel Core Ultra X9 388H. The Arc G3 has an empty benchmark array, so there are no recorded wins for that processor. The X9 388H, therefore, wins in every category where measurements exist.

For multi-core performance, the X9 388H shows strong results across Cinebench tests. It scores 2,955 in Cinebench R15 multicore, 13,101 in R20 multicore, and 18,911 in R23 multicore. Single-core results are equally solid: 309.5 in R15, 1,849 in R20, and 2,200.5 in R23. These numbers indicate a processor that handles both heavily threaded workloads and lightly threaded tasks with comparable efficiency.

The Passmark suite reinforces this picture. The X9 388H records 36,811 in multithreaded tests and 4,280 in single-thread tests. Integer math scores 90,882, while floating-point math reaches 112,550. Data compression hits 361,763, and data encryption reaches 28,490. Extended instruction workloads score 29,943. Prime number finding, a test sensitive to clock speed and branch prediction, scores 358. Random string sorting completes at 44,010, and physics calculations score 3,226.

Because the Arc G3 has no benchmark entries, the database cannot determine where it might win. The architecture suggests it would trail in both single-core and multi-core tests due to lower clock speeds and two fewer cores, but without recorded data, any such conclusion would be speculative. The database only reports what is measured, and the measurements exist solely for the X9 388H.

FAQ

Q: Which processor has a higher boost clock?

A: The Intel Core Ultra X9 388H has a boost clock of 5.10 GHz, while the Intel Arc G3 boosts to 4.60 GHz.

Q: Do both processors use the same socket?

A: Yes, both the Intel Arc G3 and the Intel Core Ultra X9 388H use the Intel BGA 2540 socket.

Q: What is the difference in L3 cache between the two?

A: There is no difference. Both processors have 18 MB of shared L3 cache.

Q: Which processor has more cores?

A: The Intel Core Ultra X9 388H has 16 cores, while the Intel Arc G3 has 14 cores. Both have the same number of threads as cores, so 16 threads versus 14 threads.

Q: How does the Core Ultra X9 388H compare to the AMD Ryzen 5 7500X3D?

A: The Core Ultra X9 388H has an average benchmark score of 44,466, which is 0.2% lower than the AMD Ryzen 5 7500X3D's average score of 44,573.

Q: What integrated graphics do each of these processors feature?

A: The Intel Arc G3 features the Arc B370 integrated graphics, while the Intel Core Ultra X9 388H features the Arc B390.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries for the Intel Arc G3 versus the Intel Core Ultra X9 388H. The wins counter shows 0 for both processors, and the head-to-head benchmark array is empty. However, the overall benchmark scores for the X9 388H provide a clear picture of its performance level, which can be compared to its nearest rivals.

The Core Ultra X9 388H's average benchmark score of 44,466 places it just below the AMD Ryzen 5 7500X3D, which scores 44,573, a difference of 0.2%. It edges out the Intel Core i9-13950HX, which scores 44,342, by 0.3%. The AMD Ryzen AI Max 385 scores 44,309, putting the X9 388H 0.4% ahead. The Intel Core i5-13600 scores 44,240, placing the X9 388H 0.5% ahead.

Looking at specific workload categories for the X9 388H, the Cinebench R23 multicore score of 18,911 represents the processor's peak sustained multi-threaded performance. The R23 single-core score of 2,200.5 indicates that the 5.10 GHz boost clock is effective for lightly threaded workloads. In the Passmark suite, the floating-point math score of 112,550 is notably higher than the integer math score of 90,882, suggesting strong FPU execution resources. Data compression at 361,763 is the highest raw score in the Passmark set, reflecting efficient memory bandwidth utilization for that workload.

The physics score of 3,226 and the prime number finding score of 358 are lower relative to other Passmark tests, which is typical for processors that prioritize integer and floating-point throughput over specialized single-thread latency. The random string sorting score of 44,010 sits between the integer and floating-point results, indicating balanced memory access patterns for that test.

Without recorded benchmarks for the Arc G3, the database cannot produce a direct head-to-head comparison. The X9 388H's results stand alone, and the Arc G3's absence from the benchmark records means no comparative conclusions can be drawn from measured data. The architecture differences, specifically the two additional cores and higher clocks on the X9 388H, suggest the direction of performance, but the database only confirms results for the X9 388H.